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Report N ' - 7 g ° on Department of Environmental Quality Northwest Region Portland Office a se Theodore R. Kulongoski, Governors ti d ; - _� 1 7 -: 2 020 SW 4 Avenue, Suite 400 1 .- a Portland, OR 97201 -4987 [f. L s .;,.: ` .rj l ( . £ (503) 229 -5263 July 7 2006 A FAX (503) 229 -6945 I AR 1 2007 TTY (503) 229 -5471 JEB DORAN 'L,; i 'L ' k A `0 �=ii� TRI- COUNTY METROPOLITAN DIST OF OREGON �. : , • . -.YT { � ° '�' 710 NE HOLLADAY PORTLAND OR 97232 . Re: Construction Storm Water Control Permit ORR l OA -502 File No. 115367 County: Washington . • Site: Washington County Commuter Rail • Dear Mr. Doran: The Oregon Department of Environmental Quality (DEQ) has received your application and application fees for registration for coverage under the National Pollutant Discharge Elimination System (NPDES) Construction Storm Water Discharge Permit 1200 -C. The purpose of the Construction Storm Water Discharge Permit is to prevent violations of the State Water Quality Standards and minimize adverse impacts to the environment. This statewide Permit term is five years, beginning December 28, 2005 and expiring November 30, 2010, regardless of when you apply for registration within the 5 year time period. DEQ is approving your registration of the requested Permit. Please be aware that in addition to the application fees that you have already submitted you will be assessed an annual fee for each additional year of construction activity as long as this permit is in effect. For phased developments, an erosion control plan for any phases not submitted with your original application must be submitted to this regional DEQ office (Attention: Storm Water) 30 days prior to commencement of construction activities. The plan(s) will be reviewed, and if acceptable, you will be notified of approval by e- mail if your email address is on file with DEQ. Permit Provisions Please review your 1200 -C Permit copy carefully. In general the Permit: . • prohibits visible or measurable quantities of sediments from leaving the construction site, • requires erosion control measures be inspected by the permittee — see the Permit for specific activity timelines, • requires daily visual monitoring when runoff is occurring, . • requires that records of these inspections be kept on site, and • requires all erosion control measures remain in place through the duration of construction. If the construction site is 5 acres or greater and Permit registration occurs: • after May 31, 2006, a 14 -day public review period is required after DEQ review and approval of the Erosion and Sediment Control Plan (ESCP) but prior to DEQ approving the Permit registration, and • after September 30, 2006, one of two options must be met for storm water discharges to streams impaired for turbidity or sediment: o weekly storm water runoff sampling for turbidity when runoff is occurring, or o additional best management practices must be added. 1EO.ut a _ 'i Legal Owner Responsibilities If during project development legal responsibility shifts from the present permittee (you) to another party, this permit must be transferred to the new responsible party. There is a $60 filing fee associated with permit transfer, as well as a one page application that must be submitted to DEQ. Also, it is the responsibility of the owner of the property to properly maintain petroleum separator /trap devices if they are in use at your site. Construction Storm Water Discharge Permit Termination Process Be sure to submit the Permit Termination Request Form (Notice of Termination Form) to this regional DEQ office when your construction activity is completed. If a Termination Form is not received, you will be billed the annual fee for each additional year this permit remains in effect. Construction Storm Water Discharge Permit coverage may be terminated when the following conditions are met: • the permittee has constructed and completed all of the buildings; o the site is stabilized, i.e. landscaped with vegetation growing, and no exposed soil is present, o with no further grading or soil disturbances occurring, and o temporary erosion and /or sediment controls have been removed and properly disposed, or • the permittee is selling individual home lots of less than one acre; o the utilities, roads, and initial grading are complete, and o temporary seeding has occurred, vegetation is growing and no exposed soil is present, and o temporary erosion and /or sediment controls have been removed and properly disposed. In conclusion, this 1200 -C Permit does not authorize excavation or fill in state waterways; including wetlands, and does not replace the requirement for receiving authorization to do this type of work under Section 404 of the Clean Water Act. Please check the DEQ website at http: / /www.deq. state. or. us /wq /wgpermit /stormwaterhome.htm for forms or information. If you have any questions about this 1200 -C Permit, please contact Dennis Jurries by phone at (503) 229 -5937 or email at jurries.dennisadeq.state.or.us . Si " ely, c Dennis Jurries, PE DEQ NWR Storm Water Engineer 2020 SW 4 Avenue, Suite 400 Portland, OR 97201 Enclosure cc: File ?; ;r, ii ,,; Permit Number: 1200 -C Expiration Date: November 30, 2010 Page 1 of 24 GENERAL PERMIT NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM STORMWATER DISCHARGE PERMIT Oregon Department of Environmental Quality 811 SW Sixth Avenue, Portland OR 97204 Telephone: (503) 229 -5279 or 1- 800 - 452 -4011 (toll free in Oregon) Issued pursuant to ORS 468B.050 and Section 402 of the Federal Clean Water Act REGISTERED TO: 07/06/06 GEN 12C WASHINGTON/NWR File No. 115367 ORR10A -502 Tri-County Metropolitan District of Oregon (TriMet) 710 NE Holladay Portland, OR 97232 Site: Washington County Commuter Rail SOURCES COVERED BY THIS PERMIT: Construction activities including clearing, grading, excavation, and stockpiling that will disturb one or more acres and may discharge to surface waters or conveyance systems leading to surface waters of the state. Also included are activities that disturb less than one acre that are part of a common plan of development or sale if the larger common plan of development or sale will ultimately disturb one acre or more and may discharge to surface waters or conveyance systems leading to surface waters of the state. Oregon Administrative Rules (OAR) 340 - 045 -0015 and 0033(5) require all owners or operators responsible for these sources to register under this permit or obtain an individual permit. This permit does not authorize in -water or riparian work regulated by the Federal Clean Water Act Section 404 permit program. These types of activities are regulated by the Oregon Department of State Lands, U.S. Army Corp of Engineers, and the Department of Environmental Quality Section 401 certification program. Unless specifically authorized by this permit, by another National Pollutant Discharge Elimination System (NPDES) or Water Pollution Control Facilities (WPCF) permit, or by OAR, any other direct or indirect discharge to waters of the state is prohibited, including discharges to an underground injection control (UIC) system. '✓t s"�� Issued: December 28, 2005 Lauri Aunan, Administrator Expiration Date: November 30, 2010 Water Quality Division PERMITTED ACTIVITIES Until this permit expires, is modified or revoked, the permit registrant is authorized to construct, install, modify, or operate erosion and sediment control measures and stormwater treatment and control facilities, and to discharge stormwater and certain specified non- stormwater discharges to surface waters of the state in conformance with all the requirements, limitations, and conditions set forth in the permit including attached schedules as follows: Page Schedule A - Limitations and Controls for Stormwater and Non - Stormwater Discharges 3 Schedule B - Minimum Monitoring Requirements 12 Schedule C - Compliance Schedule 14 • Schedule D - Special Conditions 15 Schedule E. - (Not Applicable) NA Schedule F - General Conditions 18 Permit Number: 1200 -C Expiration Date: November 30, 2010 Page 2 of 24 PERMIT REGISTRATION 1. Renewal Requirements a. Activities Registered Under the Previous 1200 -C Permit (issued February 2001). i. Permit registrants must submit a complete permit renewal application to the department prior to the permit expiration date of December 31, 2005 to ensure uninterrupted permit coverage under this permit for construction activities continuing beyond December 31, 2005. ii. An Erosion and Sediment Control Plan (ESCP) submitted prior to December 31, 2005 is not required to be resubmitted to the department or Agent except as required in Schedule C. iii. Permit registrants that do not submit a renewal application by the previous 1200 -C expiration date must submit a new application for coverage under this permit and follow condition #2 below. b. Renewal of Permit Registration under this Permit (December, 2005) i. To maintain continuous permit registration during the renewal process, a permit registrant must submit a complete renewal application with a revised ESCP, if applicable, to the department 180 days prior to this permit expiration unless otherwise approved by the department. ii. If the department fails to act on the application by the expiration date, permit registration is administratively extended until the department takes action on the application. iii. If registration under the renewed permit is not required or appropriate, the department will notify the applicant. 2. New Construction Activities a. Applicants seeking registration under this permit must: i. Submit a complete department- approved application form with an ESCP that complies with the permit requirements to the department or Agent at least thirty (30) days prior to the planned soil disturbance unless otherwise approved by the department. ii. Prior to beginning any soil disturbance activity, receive written notice from the department or Agent that permit registration has been approved. b. The department or Agent will register the applicant after the ESCP has been approved by the department or Agent. For construction activities that disturb five (5) or more acres, a public notice period is required as provided in Condition 4 below. The ESCP is approved when the department or Agent provides written notice of approval. c. If the application for registration is denied by the department or Agent, a construction activity cannot be registered under this permit, or if the applicant does not wish to be regulated by this permit, the applicant may apply for an individual permit in accordance with OAR 340 -045 -0030. 3. Transfer of Permit Registration • To transfer permit registration, an owner or permit registrant must submit a department- approved transfer form prior to permit expiration and prior to transfer of ownership or operation. 4. Public Review Period on Application and ESCP Permit registrants that submit an application and ESCP for construction activities that disturb five (5) or more acres after June 1, 2006 will be subject to a 14 -day public review period before permit registration by the department or Agent. The public review period will begin after the department or Agent has determined that the application is complete. SWM -DY -00473 • December 2005 Permit Number: 1200 -C Expiration Date: November 30, 2010 Page 3 of 24 SCHEDULE A LIMITATIONS AND CONTROLS FOR STOR1NIWATER DISCHARGES 1. Water Quality Standards a. The permit registrant must not cause a violation of instream water quality standards. b. If the permit registrant develops, implements, and revises its ESCP in compliance with Schedule A of this permit, the department assumes that the discharges authorized by this permit will not cause a violation of water quality standards unless the department obtains evidence to the contrary. c. In instances were the department determines that the permit registrant's stormwater discharges are causing a violation of water quality standards, the department may take enforcement action for violations of the permit and will require the permit registrant to do one or more of the following: i. Develop and implement an Action Plan, which is considered an addendum to the ESCP, describing ESCP modifications that are necessary to prevent and control erosion and sediment discharges to meet water quality standards; ii. Submit valid and verifiable data and information that are representative of ambient conditions and indicate that the receiving water is meeting water quality standards; or iii. Curtail stormwater pollutant discharges to the extent possible and submit an individual permit application. 2. Water Quality Requirements for TMDL and 303(d) Listed Waterbodies In addition to other applicable requirements of this permit, if sediment or turbid water from a permit registrant's construction project has the potential to discharge into waterbodies that are listed for turbidity or sedimentation on the most recently EPA - approved Oregon 303(d) list or that have an established Total Maximum Daily Load (TMDL) for sedimentation or turbidity, the permit registrant must implement one of the two following sets of actions, in accordance with Schedule C. a. Option #1; Collect and analyze samples for turbidity in stormwater runoff from the construction site as - required by condition B.2. (p. 12) and compare the results to the benchmark value of 160 Nephelometric Turbidity Units (NTUs). The benchmark is used to determine if best management practices are effective; it is not an effluent limit. If any stormwater sample exceeds the benchmark, then the permit registrant must evaluate the best management practices (BMPs) and the adequacy of the ESCP and take corrective actions. If after such actions have been implemented and sample results still exceed the 160 NTU benchmark, the requirements of Option #2 below must be followed, and the permit registrant must submit an Action Plan to the department identifying the selected BMP(s) that will be implemented and the rationale for choosing the selected BMP(s). b. Option #2: In addition to the applicable BMPs required by condition A.7., implement one or more of the following BMPs to control and treat sediment and turbidity: i. Compost berms, compost blankets, or compost socks; ii. Erosion control mats (rolled or blown); iii. Tackifiers used in combination with perimeter sediment control BMPs; iv. Established vegetated buffers sized at 50 feet plus 25 feet per 5 degrees of slope; v. Water treatment by electro - coagulation, chemical flocculation, or filtration; or vi. Other substantially equivalent sediment or turbidity BMP approved by the department. The selected BMP(s) must be specifically identified in the ESCP as addressing this condition of the permit, and the rationale for choosing the selected BMP(s) must also be provided. 3. Performance Requirements SWM -DY -00473 December 2005 Permit Number: 1200 -C Expiration Date: November 30, 2010 Page 4 of 24 a. Prevent Discharge of Significant Amounts of Sediment. The permit registrant must prevent the discharge of significant amounts of sediment to surface waters or conveyance systems leading to surface waters. Significant amounts of sediment result from the actions or inactions of the permit registrant at a site and result in visual indications that sediment has left or is likely to leave the site. The following conditions describe significant amounts of sediment: i. Earth slides or mud flows; ii. Concentrated flows of stormwater such as rills, rivulets or channels that cause erosion when such flows are not filtered or settled to remove sediment; iii. Turbid flows of stormwater that are not filtered or settled to remove turbidity; iv. Deposits of sediment at the construction site in areas that drain to unprotected stormwater inlets or catch basins that discharge to surface waters. Inlets and catch basins with failing sediment controls due to lack of maintenance or inadequate design are considered unprotected; v. Deposits of sediment from the construction site on public or private streets outside of the permitted construction activity; or vi. Deposits of sediment from the construction site on any adjacent property outside of the permitted construction activity. b. Corrective Action. If significant amounts of sediment or turbidity (as described in A.3.a above) are visibly detected in: 1) the discharge to a conveyance system leading to surface waters; 2) the discharge to surface waters 50 feet downstream; or 3) the discharge in surface waters at any location where more than one -half of the width of the receiving surface waters is affected, the permit registrant must: i. Immediately, but no later than 24 hours after initial detection, take corrective actions or implement additional effective BMPs until the significant amounts of sediment or turbidity are no longer visually detectable and to ensure that the requirements of Conditions A.1. and A.3.a. are met. ii. Evaluate the ESCP to determine the cause of the discharge. iii. Document in the inspection records the corrective actions taken. iv. Submit an Action Plan to the department within ten (10) calendar days of the discharge identifying the correction actions taken to cease the discharge, if such actions require a change to the ESCP or a change in the method(s) of implementing the ESCP, (e.g., increased inspection frequency). Approval of the Action Plan by the department prior to implementation of corrective actions is not - required. The Action Plan must be kept onsite as per condition B.3., p. 13. c. Authorized Stormwater Discharges. Subject to compliance with the terms and conditions of this permit, the permit registrant is authorized to discharge the following: i. Stormwater associated with construction activity that is authorized by this permit. ii. Stormwater from support activities at the construction site (e.g., concrete or asphalt operations, equipment staging yards, material storage areas, excavated material disposal areas, borrow areas) provided: (1) The support activity is directly related to the construction site required to have NPDES permit coverage for discharges of stormwater associated with construction activity; (2) The support activity is not a commercial operation serving multiple unrelated construction projects by different permit registrants, and does not operate beyond the completion of the construction activity at the last construction project it supports; and (3) Appropriate controls and measures are identified in an ESCP covering the discharges from the support activity areas. SWM-DY-00473 December 2005 Permit Number: 1200 -C Expiration Date: November 30, 2010 Page 5 of 24 d. Allowable Non- Stormwater Discharges. This permit authorizes the following non - stormwater discharges to surface water provided they are identified in the ESCP and all necessary controls are implemented to minimize sediment transport: i. Discharges from fire- fighting activities; ii. Fire hydrant and potable water flushing (refer to department guidance); iii. Waters used to wash vehicles where detergents or hot water are not used; iv. Potable water including uncontaminated water line flushing; v. Routine external building wash down that does not use detergents or hot water; vi. Pavement wash waters where spills or leaks of toxic or hazardous materials have not occurred (unless all spilled material has been removed) and where detergents or hot water are not used; vii. Uncontaminated air conditioning or compressor condensate; vi ii. Construction dewatering activities; ix. Foundation or footing drains where flows are not contaminated with process materials such as solvents; and x. Landscape irrigation. For other non - stormwater discharges, the permit registrant may ask the department to determine if another permit is needed. The disposal of wastes to surface water or onsite is not authorized by this permit. The permit registrant must submit a separate permit application for such discharges. 4. Erosion and Sediment Control Plan (ESCP) and Action Plan Preparation and Submittal a. Responsibilities of Permit Registrant. The permit registrant must ensure that an ESCP is prepared and revised as necessary for the construction activity regulated by this permit and submitted to the department or Agent as required by this permit. b. Qualifications to Prepare ESCP. i. For construction activities disturbing 20 or more acres, the ESCP must be prepared and stamped by an Oregon Registered Professional Engineer, Oregon Registered Landscape Architect, or Certified Professional in Erosion and Sediment Control (Soil and Water Conservation Society). ii. If engineered facilities such as sedimentation basins or diversion structures for erosion and sediment control are required, the ESCP must be prepared and stamped by an Oregon Registered Professional Engineer. • c. Submittal of ESCP and if Required, Action Plans. i. The permit registrant must submit the ESCP to the department or Agent prior to obtaining registration under this permit (see Permit Registration, Condition 2 of this permit, p. 2). ii. If ESCP revisions are made after permit registration is approved, the permit registrant must submit revisions to the ESCP in the form of an Action Plan to the department, or if corrective actions are required by A.3.b., p. 4, within 24 hours of initial detection of the stormwater discharge. (1) The Action Plan is considered an addendum to the ESCP. (2) Approval of the Action Plan by the department prior to implementation of corrective actions is not required. (3) An Action Plan may be required due to changes in the project design, local conditions, project schedule (e.g., schedule delays postpone earthwork to wet weather season so additional controls are needed), weather conditions or other appropriate reasons. (4) The Action Plan must clearly identify any necessary changes (such as type or design) to the BMPs identified in the ESCP, their location, maintenance required, and any other revisions necessary to prevent and control erosion and sediment runoff. SWM -DY -00473 December 2005 Permit Number: 1200 -C Expiration Date: November 30, 2010 Page 6 of 24 iii. If the permit registrant does not receive a response on the Action Plan from the department or Agent within ten (10) days of the Action Plan receipt, the proposed revisions are deemed approved. iv. The department or Agent may require the permit registrant to submit an Action Plan at any time if the ESCP is inadequate to prevent the discharge of significant amounts of sediment or turbidity to surface waters or to conveyance systems that discharge to surface waters. The permit registrant must submit the Action Plan according to the timeframe specified by the depattuuent or Agent.. 5. ESCP Implementation a. The permit registrant must ensure that the ESCP is implemented for the construction activity regulated .by this permit. Failure to implement any portion of the ESCP constitutes violation of the permit on the part of the permit registrant. b. The permit registrant must ensure that the ESCP is implemented according to the following sequence: i. Before Construction. (1) Identify, mark, and protect (by fencing off or other means) critical riparian areas and vegetation including important trees and associated rooting zones and vegetation areas to be preserved. (2) Identify vegetative buffer zones between the site and sensitive areas (e.g., wetlands), and other areas to be preserved, especially in perimeter areas. (3) Hold a pre - construction meeting of project construction personnel that includes the inspector required by condition A.6.b. to discuss of erosion and sediment control measures and construction limits. ii. During and After Construction. (1) Site Access Areas (construction entrances, roadways equipment parking areas). Stabilize site entrances and access roads prior to earthwork. f (2) Install Sediment Control Measures. Install perimeter sediment control, including storm drain inlet protection as well as all sediment basins, traps, and barriers which must be in place before vegetation is disturbed. (3) Non - Stormwater Pollution Control Measures. Concurrent with establishing construction access controls and sediment controls, the permit registrant must establish material and waste storage areas, concrete truck and other concrete equipment washout areas and other non - stormwater controls prior to the start of construction activities. (4) Runoff Control. Stabilize stream banks and construct the primary runoff control measures to protect areas from concentrated flows. (5) Land Clearing, Grading and Roadways. • (a) Begin land clearing, excavation, trenching, cutting or grading after installing applicable sediment and runoff control measures. (b) Provide appropriate erosion and sediment control BMPs for all roadways including gravel roadways. (c) Install additional control measures as work progresses as needed. (6) Surface Stabilization (temporary and permanent seeding, mulching). Apply temporary or permanent soil stabilization measures immediately on all disturbed areas as grading progresses. (7) Construction and Paving (install utilities, buildings, paving, etc.). Erosion and sediment control measures must remain in place for the duration of construction, including protection for active storm drain inlets and appropriate non - stormwater pollution controls. (8) Final Stabilization and Landscaping. SWM -DY -00473 December 2005 Permit Number: 1200 -C Expiration Date: November 30, 2010 Page 7 of 24 Provide permanent erosion prevention measures on all exposed areas and remove all temporary control measures as areas are stabilized. 6. ESCP Elements The permit registrant must ensure that the ESCP contains the following elements: a. Local Government Requirements. Include any procedures necessary to meet applicable local government erosion and sediment control or stormwater management requirements. b. Inspections. i. Inspections must be conducted by a person knowledgeable in the principles and practice of erosion and sediment controls who possesses the skills to assess conditions at the construction site that could impact stormwater quality, is knowledgeable in the correct installation of the erosion and sediment controls, and is able to assess the effectiveness of any sediment and erosion control measures selected to control the quality of stormwater discharges from the construction activity. ii. Identify the person(s) or title and experience of the personnel that will conduct inspections. Provide the following for each person: (1) Name; (2) Contact phone number and, if available, e -mail address; and (3) Description of experience and training. c. Narrative Site Description. i. Nature of the construction activity, including a proposed timetable for major activities; ii. Estimates of the total area of the permitted site and the area of the site that is expected to undergo clearing, grading or excavation; iii. Nature of the fill material to be used, the insitu soils, and the erosion potential of such soils; and iv. Names of the receiving water(s) for stormwater runoff. d. Site Map. i. The site map kept on site must represent the actual BMP controls being used onsite, particularly those BMPs identified in the most recent Action Plan(s); ii. The site map must show sufficient roads and features for the department or Agent to locate and access the site; iii: Total property boundary including surface area of the development; iv. Areas of total soil disturbance (including, but not limited to, showing cut and fill areas and pre and post development elevation contours); v. Drainage patterns before and after finish grading; vi. Location(s), size, and type of discharge point(s); vii. Areas used for the storage of soils or wastes; viii.Areas where vegetative practices are to be implemented; ix. Location of all erosion and sediment control measures or structures; x. Location of impervious structures after construction is completed. Include buildings, roads, parking lots, outdoor storage areas, etc., if any; xi. Springs, wetlands and other surface waters located on -site; xii. Boundaries of 100 -year floodplains if determined and easily available; xiii.Location of stormwater discharge points to receiving water(s) or stormwater conveyance systems if applicable; SWM-DY-00473 December 2005 Permit Number: 1200 -C Expiration Date: November 30, 2010 Page 8 of 24 xiv. Location of storm drain catch basins and the location of catch basins with inlet protection, if applicable and a description of the type of catch basins used (e.g., curb inlet, field inlet, grated drain, combination, etc.); xv. Location of septic drain fields if applicable; xvi. Location of existing or proposed drywells or other UICs if applicable; xvii. Location of drinking water wells; xviii. Details of sediment and erosion controls including installation techniques; and xix. Details of detention ponds, storm drain piping, inflow and outflow details. e. Implementation Schedule and Description of BMPs Include in the ESCP the implementation schedule and description of BMPs to be used at the site. See Condition A.S. for implementation requirements and conditions A.7. and A.B. for minimum BMP requirements. 7. Required BMPs The following controls and practices, if appropriate for the site, are required in the ESCP and must be implemented according to the schedule in the ESCP. If the permit registrant determines that any of these controls or practices is not appropriate, the rationale for the change must be provided in the ESCP. a. Wet Weather BMPs. i. Generally construction activities must avoid or minimize excavation and bare ground activities that occur on slopes greater than five (5) percent during the period of October 1 through May 31. ii. Temporary stabilization of soils must be installed at the end of the shift before a holiday or weekend if needed based on weather forecast. • b. Runoff Controls. In developing runoff control practices, at a minimum the following BMPs must be considered: slope drains, energy dissipaters, diversion of run -on, temporary diversion dikes, grass -lined channel (turf reinforcement mats), trench drains, drop inlets, and check dams. c. Erosion Prevention Methods. In developing erosion prevention methods, at a minimum the following BMPs must be considered: i. Clearing and Grading Practices. (1) Provide structural erosion prevention during grading and earthwork- surface roughening and prevent erosion on graded surfaces. (2) Top- soiling, temporary seeding and planting, permanent seeding and planting, mycorrhizae/ biofertilizers, mulches, compost blankets, erosion control blankets and mats, soil binders, soil tackifiers, sodding vegetative buffer strips, and protection of trees with protective construction fences. ii. Wind Erosion/Dust Control. (1) All erosion and sediment controls not in the direct path of work must be installed before any land disturbance. (2) Whenever practicable, clearing and grading must be done in a phased manner to prevent exposed inactive areas from becoming a source of erosion. iii. Vegetative Erosion Control Practices. (1) Preserve existing vegetation and re- vegetate open areas when practicable before and after grading or construction. SWM -DY -00473 December 2005 Permit Number: 1200 -C Expiration Date: November 30, 2010 Page 9 of 24 (2) Biotechnical erosion control measures: live staking, live fascines and brush wattles, stabilization mats, pole planting, brush box, fascines with sub - drains, live pole drains, and brush packing or live gully fill repair. (3) All temporary sediment control practices must not be removed until permanent vegetation or • other cover of exposed areas is established. (4) If vegetative seed mix is used, identify the type of seed mix (percentages of the various seeds of annuals, perennials and clover). d. Sediment Controls. i. Peripheral Erosion and Sediment Controls. (1) Sediment control must be provided along the site perimeter and at all operational internal storm drain inlets at all times during construction. (2) Active inlets must be considered part of the site perimeter because they provide an avenue for sediment and other pollutants to leave the site. ii. Erosion Control Practices. In developing sediment control practices, include in the ESCP installation details and at a minimum the following must be considered: sediment fences, sand bag barrier, gravel bag berm; earth dikes, drainage swales, check dams, subsurface drains which daylight to the surface, pipe slope drains, rock outlet protection, sediment traps, rock and brush filters, compost berm/compost sock, fiber . rolls /wattles, storm drain inlet protection, and temporary or permanent sedimentation basins. iii. Reducing Sediment Tracking. (1) Prior to any land disturbing activities each site must have graveled, paved, or constructed entrances, exits and parking areas with exit tire wash to reduce the tracking of sediment onto • public or private roads. (2) All unpaved roads located onsite must be graveled. Other effective erosion and sediment control measures either on the road or down gradient may be used in place of graveling. (3) When trucking saturated soils from the site, either water -tight trucks must be used or loads must be drained on -site until dripping has been reduced to minimize spillage on roads. e. Non - Stormwater Pollution Controls. Non- Stormwater Pollution Controls BMPs must be in -place throughout the grading and construction phases. In developing non- stormwater pollution control practices, at a minimum the following must be considered: i. Pollution Prevention. (1) BMPs used to prevent pollution of stormwater or to treat stormwater from the following activities: dewatering and ponded water management, paving operation controls, temporary equipment bridge, illicit connection, and illegal discharge. (2) BMPs that will be used to prevent or minimize stormwater from being exposed to pollutants from spills, no discharge of concrete truck wash water, vehicle and equipment cleaning, vehicle and equipment fueling, maintenance, and storage, other cleaning and maintenance activities, and waste handling activities. These pollutants include fuel, hydraulic fluid, and other oils from vehicles and machinery, as well as debris, leftover paints, solvents, and glues from construction operations. ii. Stockpile Erosion and Sediment Control Practices. (1) Stockpiles located away from the construction activity but still under the control of the permit registrant must also be protected to prevent significant amounts of sediment or turbid water from discharging to surface waters. (2) At the end of each workday the soil stockpiles must be stabilized, covered or other BMPs must be implemented to prevent discharges to surface waters. SWM -DY -00473 December 2005 Permit Number: 1200 -C Expiration Date: November 30, 2010 Page 10 of 24 (3) In developing these practices, at a minimum the following must be considered: diversion of uncontaminated flows around stockpiles, use of cover over stockpiles, and installation of sediment fences around stockpiles iii. Solid Waste and Hazardous Materials Management. (1) The department encourages the permit registrant to reuse and recycle construction wastes. (2) Any use of toxic or other hazardous materials must include proper storage, application, and disposal. (3) In developing these practices, at a minimum the following must be described in the ESCP and implemented where practical: written spill prevention and response procedures, employee training on spill prevention and proper disposal procedures; regular maintenance schedule for vehicles and machinery; and material delivery and storage controls, training and signage, material use, covered storage areas for waste and supplies. (4) The permit registrant must manage hazardous wastes, used oils, contaminated soils, concrete management, sanitary waste management, liquid waste management, or other toxic substances discovered or generated during construction activities in accordance with state and federal regulations. In some cases, department approval for management and disposal may be required. f. Inspection and Maintenance. To provide for continued performance, BMPs must be inspected before, during, and after significant storm events. During grading and construction, the permit registrant is responsible for maintaining the stormwater pollution control BMPs. The permit registrant must establish and promptly implement procedures for maintenance and repair of erosion and sediment control measures. i. General Site Maintenance. (1) Significant amounts of sediment that leave the site must be cleaned up within 24 hours and placed back on the site and stabilized or disposed of properly. In addition, the source(s) of the sediment must be controlled to prevent continued discharge within 24 hours. Any instream clean up of sediment must be preformed according to requirements and timelines set by the Oregon Department of State Lands. (2) Sediment must not be intentionally washed into storm sewers or drainage ways. Vacuuming or dry sweeping must be used to clean up released sediments. (3) If fertilizers are used to establish vegetation, the application rates must follow manufacturer's guidelines and the application must be done in such a way to minimize nutrients discharging to surface waters. ii. Maintenance of Erosion and Sediment Controls. (1) For a sediment fence, the trapped sediment must be removed before it reaches one third of the above ground fence height. (2) Other sediment barriers (e.g., biobags): the sediment must be removed before it reaches two inches of accumulation in any area above the sediment barrier(s). (3) For catch basin protection, cleaning must occur when sediment retention capacity has been reduced by fifty percent. (4) For a sediment basin, removal of trapped sediments must occur when design capacity has been reduced by fifty percent. - iii. Stormwater Treatment System Requirement. • If a stormwater treatment system (e.g., electro- coagulation, chemical flocculation, filtration, etc.) for sediment removal is employed, an operation and maintenance plan must be submitted to the department for approval .before startup of the treatment system. Upon department approval of the plan, the permit registrant must implement the plan. SWM-DY-00473 December 2005 Permit Number: 1200 -C Expiration Date: November 30, 2010 Page 11 of 24 8. Additional BMP Requirements During Inactive Periods a. If all construction activities cease at the site for thirty (30) days or more, the entire site must be stabilized using vegetation or a heavy mulch layer, temporary seeding, or another method that does not require germination to control erosion. b. On any significant portion of the site, if construction activities cease for fifteen (15) days or more, temporary covering with straw or compost mulch or other covering that is tackified to prevent soil or wind erosion must occur until work resumes. • • SWM -DY -00473 December 2005 Permit Number: 1200 -C Expiration Date: November 30, 2010 Page 12 of 24 SCHEDULE B MINIMUM MONITORING REQUIREMENTS 1. Visual Monitoring Requirement a. The following must be inspected by the permit registrant: i. All areas of the site disturbed by construction activity to ensure that BMPs are in working order. ii. Discharge point(s) identified in the ESCP for evidence of or the potential for the discharge of pollutants, and to ascertain whether erosion and sediment control measures are effective in preventing significant impacts to surface waters. Where discharge points are inaccessible, nearby downstream locations must be inspected to the extent that such inspections are practicable. iii. BMPs identified in the ESCP and any ESCP revisions documented in Action Plan(s) to assess whether they are functioning properly. iv. Locations where vehicles enter or exit the site for evidence of off -site sediment tracking. v. Areas used for storage of materials that are exposed to precipitation for evidence of spillage or other potential to contaminate stormwater runoff. b. All ESCP controls and practices must be inspected visually according to the following schedule: Site Condition Minimum Frequency 1. Active period Daily when stormwater runoff, including runoff from snow melt, is occurring. 2. Prior to the site becoming inactive or in Once to ensure that erosion and sediment control measure anticipation of site inaccessibility are in working order. Any necessary maintenance and repair must be made prior to leaving the site. 3. Inactive periods greater than seven (7) Once every two (2) weeks. consecutive calendar days 4. Periods during which the site is If practical, inspections must occur daily at a relevant and inaccessible due to inclement weather accessible discharge point or downstream location. 2. Turbidity Monitoring Requirements for TMDL and 303(d) Listed Waterbodies per Option #1 in Condition A.2.a., p. 3. In addition to the requirements in condition B.1. above, permit registrants discharging into waterbodies that are listed for turbidity or sedimentation on the most recently EPA approved Oregon 303(d) list or have an established TMDL for sedimentation or turbidity are subject to the following requirements if Option #1 (condition A.2.a..) is being followed: Frequency Monitoring Points Type of Parameter Minimum Fre q y g Sample Test Method' Turbidity At a minimum one stormwater sample All stormwater Grab Field (NTU) that represents the flow and discharge points turbidimeter characteristics of the stormwater indicated on the site discharge must be collected at each map see A.6.d.xiii., p. monitoring point on a weekly basis 7. when stormwater runoff is detectable. Occurring during regular working hours at the construction site. 2 The permit registrant must use sampling procedures, testing methods and turbidity meter calibration methods approved by the department. SWM -DY -00473 December 2005 Permit Number: 1200 -C Expiration Date: November 30, 2010 Page 13 of 24 3. Recordkeeping Requirements a. Documentation of Visual Inspection. All visual inspections must be documented in writing as follows: i. Inspection date and inspector's name. ii. At the designated discharge location(s) inspections of the quality of the discharge for any turbidity, color, sheen, or floating materials. (1) Inspect and record color and turbidity or clarity in: 1) the discharge to a conveyance system leading to surface waters, 2) the discharge to surface waters 50 feet downstream, or 3) the discharge in surface waters at any location where more than one -half of the width of the receiving surface waters is affected. (2) For turbidity and color, describe any apparent color and the clarity of the discharge, and any apparent difference in comparison with the surface waters. For a sheen or floating material, describe whether this is present or absent. If present, it could indicate concern about a possible spill or leakage from vehicles or materials storage. iii. If a site is inaccessible due to inclement weather, record the inspections noted at a relevant discharge point or downstream location if practical. iv. Location(s) of BMPs that need to be maintained, inspections of all BMPs, including erosion and sediment controls, chemical and waste controls, locations where vehicles enter and exit the site, status of areas that employ temporary or final stabilization control, soil stockpile area, and non - stormwater pollution (e.g., paints, oils, fuels, adhesives) controls. v. Location(s) of BMPs that failed to operate as designed or proved inadequate for a particular location; vi. Location(s) where additional BMPs are needed that did not exist at the time of inspection; and vii. Corrective action required and implementation dates. b. ESCP including Action Plan(s) Retained Onsite. A copy of the ESCP and the Action Plan must be retained on -site and made available on request to the department, Agent, or the local municipality. During inactive periods of greater than seven (7) consecutive calendar days, the ESCP must be retained by the permit registrant but does not need to be at the construction site. c. Inspection and Monitoring Results. All inspection records and monitoring results must be kept on -site and maintained by the permit registrant, made available to the department, Agent, or local municipality upon request, and must include: i. The construction site name as it appears on the registrant's permit and the file or site number. ii. All Action Plans that describe reasons for required changes or modifications to the ESCP and/or other corrective measures implemented during the previous reporting period. iii. Turbidity sampling results required by Condition B.2., p. 12 if applicable. d. Retention of Inspection and Monitoring Results for Three (3) Years: i. All inspection records and monitoring results must be retained for at least three (3) years after project completion. ii. In addition, these records must be delivered or made available to the department within three (3) working days of request. • SWM -DY -00473 December 2005 Permit Number: 1200 -C Expiration Date: November 30, 2010 Page 14 of 24 SCHEDULE C COMPLIANCE SCHEDULE Potential discharges into waterbodies that are on the most recent EPA - approved Oregon 303(d) list for turbidity or sedimentation or have a TMDL for turbidity or sedimentation 1. Permit registrants who obtained permit coverage prior to October 1, 2006 must: a. For EPA - approved TMDLs or 303(d) listings existing at the time permit application is made, comply with the requirements in Condition A.2. by October 1, 2006. b. For future TMDLS or 303(d) listings approved by EPA after permit application is made, comply with the requirements in Condition A.2. no later than ninety (90) days after EPA - approval of the TMDL or 303(d) list. 2. Permit registrants obtaining coverage after October 1, 2006 must: a. For EPA - approved TMDLs or 303(d) listings existing at the time permit application is made, comply with the requirements of Condition A.2. upon obtaining coverage under the permit. If Option #2 is selected, the BMP(s) must be specifically identified in the ESCP as addressing this condition of the permit and the rationale for choosing the selected BMP(s) must also be provided. b. For future TMDLS or 303(d) listings approved by EPA after permit application is made, comply with the requirements in Condition A.2. no later than ninety (90) days after EPA - approval of the TMDL or 303(d) list. SWM -DY -00473 December 2005 Permit Number: 1200 -C Expiration Date: November 30, 2010 Page 15 of 24 SCHEDULE D SPECIAL CONDITIONS 1. In the event of any inconsistency between Schedules A through D and F, Schedules A through D will apply. 2. Registration under this permit does not relieve the permit registrant from all other permitting and licensing requirements. Prior to beginning construction activities, the permit registrant must obtain all other necessary approvals. 3. Required Actions Prior to Termination of Permit Registration a. The following conditions must be met before permit registration is terminated: i. There is no reasonable potential for discharge of a significant amount of construction related sediment or turbidity to surface waters. ii. Construction materials, waste, and temporary erosion and sediment controls have been removed and disposed of properly. This includes any sediment that was being retained by the temporary erosion and sediment controls. iii. All soil disturbance activities by the permittee have been completed and all stormwater discharges from construction activities that are authorized by this permit are eliminated. • iv. All temporary erosion and sediment controls have been removed and properly disposed. v. All disturbed or exposed areas of the site must be fully stabilized as defined in Condition D.4 m. below. b. The permit registrant must complete and submit a Notice of Termination form to the department or Agent after the conditions in D.3.a. above have been satisfied. The department or Agent will not act on a request for termination until all outstanding compliance issues are resolved. 4. Permit- specific Definitions a. Action Plan means an addendum to the ESCP that describes ESCP modifications. b. Agent means a governmental entity that has an agreement with the department to assist with implementation of this general permit. c. Best Management Practices or BMPs means schedules of activities, prohibitions of practices, maintenance procedures, and other physical, structural or managerial practices to prevent or reduce the pollution of waters of the state. BMPs include treatment systems, erosion and sediment control, source control, and operating procedures and practices to control site runoff, spillage or leaks, and waste disposal. d. Borrow Area means the area from which material is excavated to be used as fill material in another area. e. Clean Water Act or CWA means the Federal Water Pollution Control Act (FWPCA) enacted by Public Law 92 -500, as amended by Public Laws 95 -217, 95 -576, 96 -483, and 97 -117; USC 1251 et seq. f. Department or DEQ means the Oregon Department of Environmental Quality. g. Detention means the temporary storage of stormwater to improve quality or reduce the volumetric flow rate of discharge or both. h. Dewatering means the removal and disposal of surface water or groundwater for purposes of preparing a site for construction. i. Discharge Point means the location where stormwater leaves the site. It includes the location where stormwater is discharged to surface water or a stormwater conveyance system. j. Erosion means the movement of soil particles or rock fragments by water or wind. k. Erosion and Sediment Control BMPs means BMPs that are intended to prevent erosion and sedimentation, such as preserving natural vegetation, seeding, mulching and matting, plastic covering, SWM -DY -00473 December 2005 Permit Number: 1200 -C Expiration Date: November 30, 2010 Page 16 of 24 filter fences, and sediment traps and ponds. Erosion and sediment control BMPs are synonymous with stabilization and structural BMPs. 1. Erosion Prevention Methods means a wide range of erosion prevention practices, materials and methods to be applied during earthwork activities including structural methods, techniques to prevent erosion on already graded surfaces, and biotechnical erosion control methods. The best way to control the discharge of sediment and related pollutants from a construction site is to prevent erosion from occurring in the first place. m. Final Stabilization or Fully Stabilized means the completion of all soil disturbing activities at the site by the permit registrant, and the establishment of a permanent vegetative cover, or equivalent permanent stabilization measures (such as riprap, gabions or geotextiles) to prevent erosion. n. Hazardous Materials means the materials defined in 40 CFR part 302 Designation, Reportable Quantities, and Notification. o. Local Government means any county, city, town, or service district. p. National Pollutant Discharge Elimination System or NPDES means the national program under Section 402 of the Federal Clean Water Act for regulation of point source discharges of pollutants to waters of the United States. q. Non - Storrnwater Pollution Controls means general site and materials management measures that directly or indirectly aid in minimizing the discharge of sediment and other construction related pollutants from the construction site. r. Permit Registrant means the owner or operator of the construction activity regulated by this permit who receives notice of registration under this general permit. Owners or operators may be individuals or other legal entities. • s. Pollutant as defined in 40 CFR § 122.2 means dredged spoil, solid waste, incinerator residue, filter backwash, sewage, garbage, domestic sewage sludge (biosolids), munitions, chemical wastes, biological materials, radioactive materials, heat, wrecked or discarded equipment, rock, sand, soil, cellar dirt and industrial, municipal, and agricultural waste discharge into water. It does not mean sewage from vessels within the meaning of section 312 of the FWPCA, nor does it include dredged or fill material discharged in accordance with a permit issued under section 404 of the FWPCA. t. Pollution or Water Pollution as defined by ORS 468B.005(3) means such alteration of the physical, chemical or biological properties of any waters of the state, including change in temperature, taste, color, turbidity, silt or odor of the waters, or such discharge of any liquid, gaseous, solid, radioactive or other substance into any waters of the state, which will or tends to, either by itself or in connection with . any other substance, create a public nuisance or which will or tends to render such waters harmful, detrimental or injurious to public health, safety or welfare, or to domestic, commercial, industrial, agricultural, recreational or other legitimate beneficial uses or to livestock, wildlife, fish or other aquatic life or the habitat thereof. u. Runoff Controls means BMPs that are designed to control the peak volume and flow rate and to prevent scour due to concentrated flows. v. Sediment means solid unconsolidated rock and mineral fragments that come from the weathering of rocks and are transported by water, air, or ice and form layers on the Earth's surface. Sediments can also result from chemical precipitation or secretion by organisms. w. Site means the area where the construction activity is physically located or conducted. x. Source Control BILIPs means physical, structural or mechanical devices or facilities that are intended to prevent pollutants from entering stormwater. A few examples of source control BMPs are erosion control practices, maintenance of stormwater facilities, constructing roofs over storage and working areas, and directing wash water and similar discharges to the sanitary sewer or a dead end sump. y. Storrnwater Conveyance means a sewer, ditch, or swale that is designed to carry stormwater; a stormwater conveyance may also be referred to as a storm drain or storm sewer. SWM -DY -00473 December 2005 Permit Number: 1200 -C Expiration Date: November 30, 2010 Page 17 of 24 z. Stormwater as defined by 40 CFR §122.26(b)(13) means stormwater runoff, snow melt runoff, and surface runoff and drainage. aa. Surface Runoff means that portion of stormwater that does not infiltrate into the ground or evaporates, but instead flows onto adjacent land or watercourses or is routed to stormwater conveyance systems. bb. Surface Water means all water naturally open to the atmosphere (e.g., rivers, lakes, reservoirs, ponds, streams, impoundments, oceans, estuaries, springs, etc.). cc. Total Daily Maximum Load or TMDL means a calculation of the maximum amount of a pollutant that a waterbody can receive and still meet state water quality standards., It is the sum of the allowable loads of a single pollutant from all contributing point and nonpoint sources. Percentages of the TMDL are allocated by the department to the various pollutant sources. The TMDL calculations must include a "margin of safety" to ensure that the waterbody can be protected in case there are unforeseen events or unknown sources of the pollutant. The calculation must also account for seasonable variation in water quality. dd. Turbidity means the optical condition of waters caused by suspended or dissolved particles or colloids that scatter and absorb light rays instead of transmitting Light in straight lines through the water column. Turbidity may be expressed as nephelometric turbidity units (NTUs) measured with a calibrated turbidity meter. ee. Underground Injection Control or UIC means any system, structure, or activity that is created to place fluid below the ground or sub - surface (e.g., sumps, infiltration galleries, drywells, trench drains, drill holes, etc.) ff. Water or Waters of the State as defined by ORS 468B.005(8) means lakes, bays, ponds, impounding reservoirs, springs, wells, rivers, streams, creeks, estuaries, marshes, inlets, canals, the Pacific Ocean within the territorial limits of the State of Oregon and all other bodies of surface or underground waters, natural or artificial, inland or coastal, fresh or salt, public or private (except those private waters which do not combine or effect a junction with natural surface or underground waters), which are wholly or partially within or bordering the state or within its jurisdiction. SWM -DY -00473 December 2005 Permit Number: 1200 -C Expiration Date: November 30, 2010 Page 18 of 24 SCHEDULE F NPDES GENERAL CONDITIONS SECTION A. STANDARD CONDITIONS 1. Duty to Comply The permit registrant must comply with all conditions of this permit. Any permit noncompliance constitutes a violation of Oregon Revised Statutes (ORS) 468B.025, and 40 Code of Federal Regulations (CFR) §122.41(a), and is grounds for enforcement action; for permit termination, revocation or reissuance, or modification; or for denial of a permit renewal application. 2. Penalties for Water Pollution and Permit Condition Violations ORS 468.140 allows the department to impose civil penalties up to $10,000 per day for violation of a term, condition, or requirement of a permit. Additionally 40 CFR §122.41 (A) provides that any person who violates any permit condition, term, or requirement may be subject to a federal civil penalty not to exceed $25,000 per day for each violation. Under ORS 468.943 and 40 CFR §122.41(a), unlawful water pollution, if committed by a person with criminal negligence, is punishable by a fine of up to $25,000 imprisonment for not more than one year, or both. Each day on which a violation occurs or continues is a separately punishable offense. Under ORS 468.946, a person who knowingly discharges, places, or causes to be placed any waste into the waters of the state or in a location where the waste is likely to escape into the waters of the state is subject to a Class B felony punishable by a fine not to exceed $200,000 and up to 10 years in prison. Additionally, under 40 CFR §122.41(a) any person who knowingly discharges, places, or causes to be placed any waste into the waters of the state or in a location where the waste is likely to escape into the waters of the state is subject to a federal civil penalty not to exceed $100,000, and up to 6 years in prison. 3. Duty to Mitigate The permit registrant must take all reasonable steps to minimize or prevent any discharge or sludge use or disposal in violation of this permit that has a reasonable likelihood of adversely affecting human health or the environment. In addition, upon request of the depai talent, the permit registrant must correct any adverse impact on the environment or human health resulting from noncompliance with this permit, including such accelerated or additional monitoring as necessary to determine the nature and impact of the non - complying discharge. 4. Duty to Reapply If the permit registrant wishes to continue an activity regulated by this permit after the expiration date of this permit, the permit registrant must apply for and have the permit renewed. The application must be submitted at Least 180 days before the expiration date of this permit. The department may grant permission to submit an application less than 180 days in advance but no later than the permit expiration date. 5. Permit Actions This permit may be modified, revoked and reissued, or terminated for cause including, but not limited to, the following: a. Violation of any term, condition, or requirement of this permit, a rule, or a statute b. Obtaining this permit by misrepresentation or failure to disclose fully all material facts c. A change in any condition that requires either a temporary or permanent reduction or elimination of the authorized discharge d. The permit registrant is identified as a Designated Management Agency or allocated a wasteload under a Total Maximum Daily Load (TMDL) e. New information or regulations f. Modification of compliance schedules g. Requirements of permit re- opener conditions h. Correction of technical mistakes made in determining permit conditions i. Determination that the permitted activity endangers human health or the environment j. Other causes as specified in 40 CFR §§122.62, 122.64, and 124.5 SWM-DY-00473 December 2005 Permit Number: 1200 -C • Expiration Date: November 30, 2010 Page 19 of 24 • The filing of a request by the permit registrant for a permit modification, revocation or reissuance, termination, or a notification of planned changes or anticipated noncompliance, does not stay any permit condition. 6. Toxic Pollutants The permit registrant must comply with any applicable effluent standards or prohibitions established under Oregon Administrative Rules (OAR) 340 - 041 -0033 for toxic pollutants within the time provided in the regulations that establish those standards or prohibitions, even if the permit has not yet been modified to incorporate the requirement. 7. Property Rights The issuance of this permit does not convey any property rights of any sort, or any exclusive privilege, nor does it authorize any injury to persons of property or invasion of any other private rights, nor any infringement of federal, tribal, state, or local laws or regulations. 8. Permit References Except for effluent standards or prohibitions established under Section 307(a) of the Clean Water Act and OAR 340 - 041-0033for toxic pollutants, all rules and statutes referred to in this permit are those in effect on the date this permit is issued. 9. Permit Fees The permit registrant must pay the fees required by OAR 340 - 045 -0070 to 0075. SECTION B. OPERATION AND MAINTENANCE OF POLLUTION CONTROLS 1. Proper Operation and Maintenance The permit registrant must at all times properly operate and maintain all facilities and systems of treatment and control (and related appurtenances) that are installed or used by the permit registrant to achieve compliance with the conditions of this permit. Proper operation and maintenance also includes adequate laboratory controls and appropriate quality assurance procedures. This provision requires the operation of back -up or auxiliary facilities or similar systems that are installed by a permit registrant only when the operation is necessary to achieve compliance with the conditions of the permit. 2. Duty to Halt or Reduce Activity For industrial or commercial facilities, upon reduction, loss, or failure of the treatment facility, the permit registrant must, to the extent necessary to maintain compliance with its permit, control production or all discharges or both until the facility is restored or an alternative method of treatment is provided. This requirement applies, for example, when the primary source of power of the treatment facility fails or is reduced or lost. It is not a defense for a permit registrant in an enforcement action that it would have been necessary to halt or reduce the permitted activity in order to maintain compliance with the conditions of this permit. 3. Bypass of Treatment Facilities a. Definitions (1) "Bypass" means intentional diversion of waste streams from any portion of the treatment facility. The term "bypass" does not apply if the diversion does not cause effluent limitations to be exceeded, provided the diversion is to allow essential maintenance to assure efficient operation or the diversion is due to nonuse of nonessential treatment units or processes at the treatment facility. (2) "Severe property damage" means substantial physical damage to property, damage to the treatment facilities or treatment processes that causes them to become inoperable, or substantial and permanent loss of natural resources that can reasonably be expected to occur in the absence of a bypass. Severe property damage does not mean economic loss caused by delays in production. b. Prohibition of bypass. (1) Bypass is prohibited unless: (a) Bypass was necessary to prevent loss of life, personal injury, or severe property damage; (b) There were no feasible alternatives to the bypass, such as the use of auxiliary treatment facilities, retention of untreated wastes, or maintenance during normal periods of equipment downtime. This condition is not satisfied if adequate backup equipment should have been installed in the exercise of SWM -DY -00473 December 2005 Permit Number: 1200 -C Expiration Date: November 30, 2010 Page 20 of 24 reasonable engineering judgment to prevent a bypass that occurred during normal periods of equipment downtime or preventative maintenance; and (c) The permit registrant submitted notices and requests as required under General Condition B.3.c. (2) The department may approve an anticipated bypass, after considering its adverse effects and any alternatives to bypassing, when the department determines that it will meet the three conditions listed above in General Condition B.3:b.(1).. c. Notice and request for bypass. (1) Anticipated bypass. If the permit registrant knows in advance of the need for a bypass, a written notice must be submitted to the department at least ten days before the date of the bypass. (2) Unanticipated bypass. The permit registrant must submit notice of an unanticipated bypass as required in General Condition D.S. 4. Upset a. Definition. "Upset" means an exceptional incident in which there is unintentional and temporary noncompliance with technology based permit effluent limitations because of factors beyond the reasonable control of the permit registrant. An upset does not include noncompliance to the extent caused by operation error, improperly designed treatment facilities, inadequate treatment facilities, lack of preventative maintenance, or careless or improper operation. b. Effect of an upset. An upset constitutes an affirmative defense to an action brought for noncompliance with such technology -based permit effluent limitations if the requirements of General Condition B.4.c are met. A determination made during administrative review of claims that noncompliance was caused by upset, and before an action for noncompliance is not final administrative action subject to judicial review. c. Conditions necessary for a demonstration of upset. A permit registrant who wishes to establish the affirmative defense of upset must demonstrate, through properly signed, contemporaneous operating logs, or other relevant evidence that: (I) An upset occurred and that the permit registrant can identify the causes(s) of the upset; (2) The permitted facility was at the time being properly operated; (3) The permit registrant submitted notice of the upset as required in General Condition D.5, hereof (24 -hour notice); and (4) The permit registrant complied with any remedial measures required under General Condition A.3 hereof. d. Burden of proof. In any enforcement proceeding, the permit registrant seeking to establish the occurrence of an upset has the burden of proof. 5. Treatment of Single Operational Upset For purposes of this permit, A Single Operational Upset that leads to simultaneous violations of more than one pollutant parameter will be treated as a single violation. A single operational upset is an exceptional incident that causes simultaneous, unintentional, unknowing (not the result of a knowing act or omission), temporary noncompliance with more than one Clean Water Act effluent discharge pollutant parameter. A single operational upset does not include Clean Water Act violations involving discharge without a NPDES permit or noncompliance to the extent caused by improperly designed or inadequate treatment facilities. Each day of a single operational upset is a violation. 6. Overflows from Stormwater Conveyance Systems (privately owned) a. Definitions (1) "Overflow" means the diversion and discharge of waste streams from any portion of the wastewater conveyance system through a designed overflow device or structure, other than discharges to the wastewater treatment facility. (2) "Severe property damage" means substantial physical damage to property, damage to the conveyance system which causes it to become inoperable, or substantial and permanent loss of natural resources which can reasonably be expected to occur in the absence of an overflow. (3) "Uncontrolled overflow" means the diversion of waste streams other than through a designed overflow device or structure. SWM -DY -00473 December 2005 Permit Number: 1200 -C Expiration Date: November 30, 2010 Page 21 of 24 b. Prohibition of overflows. Overflows are prohibited unless: (1) Overflows were unavoidable to prevent an uncontrolled overflow, loss of life, personal injury, or severe property damage; (2) There were no feasible alternatives to the overflows, such as the use of auxiliary conveyance systems, or maximization of conveyance system storage; and (3) The overflows are the result of an upset as defined in General Condition B.4 and meeting all requirements of this condition. c. Uncontrolled overflows are prohibited where wastewater is likely to escape or be carried into the waters of the State by any means. d. Reporting required.. Unless otherwise specified in writing by the department, all overflows and uncontrolled overflows must be reported orally to the department within 24 hours from the time the permit registrant becomes aware of the overflow. Reporting procedures are described in more detail in General Condition D.S. 7. Public Notification of Effluent Violation or Overflow If effluent limitations specified in this permit are exceeded or an overflow occurs, upon request by the depaitinent, the permit registrant must take such steps as are necessary to alert the public about the extent and nature of the discharge. Such steps may include, but are not limited to, posting of the river at access points and other places, news releases, and paid announcements on radio and television. 8. Removed Substances Solids, sludges, filter backwash, or other pollutants removed in the course of treatment or control of wastewaters must be disposed of in such a manner as to prevent any pollutant from such materials from entering waters of the state, causing nuisance conditions, or creating a public health hazard. SECTION C. MONITORING AND RECORDS 1. Representative Sampling • Sampling and measurements taken as required herein must be representative of the volume and nature of the monitored discharge. All samples must be taken at the monitoring points specified in this permit, and shall be taken, unless otherwise specified, before the effluent joins or is diluted by any other waste stream, body of water, or substance. Monitoring points may not be changed without notification to and the approval from the depaitinent. 2. Flow Measurements Appropriate flow measurement devices and methods consistent with accepted scientific practices must be selected and used to ensure the accuracy and reliability of measurements of the volume of monitored discharges. The devices must be installed, calibrated and maintained to insure that the accuracy of the measurements is consistent with the accepted capability of that type of device. Devices selected must be capable of measuring flows with a maximum deviation of less than ± 10 percent from true discharge rates throughout the range of expected discharge volumes. 3. Monitoring Procedures Monitoring must be conducted according to test procedures approved under 40 CFR part 136, unless other test procedures have been specified in this permit. 4. Penalties of Tampering The Clean Water Act provides that any person who falsifies, tampers with, or knowingly renders inaccurate any monitoring device or method required to be maintained under this permit may, upon conviction, be punished by a fine of not more than $10,000 per violation, imprisonment for not more than two years, or both. If a conviction of a person is for a violation committed after a first conviction of such person, punishment is a fine not more than $20,000 per day of violation, or by imprisonment of not more than four years, or both. 5. Reporting of Monitoring Results SWM -DY -00473 December 2005 Permit Number: 1200 -C Expiration Date: November 30, 2010 Page 22 of 24 Monitoring results must be summarized each month on a Discharge Monitoring Report form approved by the department. The reports must be submitted monthly and are to be mailed, delivered or otherwise transmitted by the 15th day of the following month unless specifically approved otherwise in Schedule B of this permit. 6. Additional Monitoring by the Permit registrant If the permit registrant monitors any pollutant more frequently than required by this permit, using test procedures approved under 40 part CFR part 136 or as specified in this permit, the results of this monitoring must be included in the calculation and reporting of the data submitted in the Discharge Monitoring Report. Such increased frequency must also be indicated. For a pollutant parameter that may be sampled more than once per day (e.g., Total Chlorine Residual), only the average daily value must be recorded unless otherwise specified in this permit. 7. Averaging of Measurements Calculations for all limitations that require averaging of measurements must utilize an arithmetic mean, except for bacteria which shall be averaged as specified in this permit. 8. Retention of Records The permit registrant must retain records of all monitoring information, including: all calibration, maintenance records, all original strip chart recordings for continuous monitoring instrumentation, copies of all reports required by this permit, and records of all data used to complete the application for this permit for a period of at least 3 years from the date of the sample, measurement, report, or application. This period may be extended by request of the department at any time. 9. Records Contents Records of monitoring information must include: a. The date, exact place, time, and methods of sampling or measurements; b. The individual(s) who performed the sampling or measurements; c. The date(s) analyses were performed; d. The individual(s) who performed the analyses; e. The analytical techniques or methods used; and f. The results of such analyses. 10. Inspection and Entry The permit registrant must allow the depaitinent or an authorized representative upon the presentation of credentials to: a. Enter upon the permit registrant's premises where a regulated facility or activity is located or conducted, or where - records must be kept under the conditions of this permit; b. Have access to and copy, at reasonable times, any records that must be kept under the conditions of this permit; c. Inspect at reasonable times any facilities, equipment (including monitoring and control equipment), practices, or operations regulated or required under this permit, and d. Sample or monitor at reasonable times, for the purpose of assuring permit compliance or as otherwise authorized by state law, any substances or parameters at any location. SECTION D. REPORTING REQUIREMENTS 1. Planned Changes The permit registrant must comply with OAR chapter 340, division 52, "Review of Plans and Specifications" and 40 CFR §122.41(1)( I ). Except where exempted under OAR chapter 340, division 52, no construction, installation, or modification involving disposal systems, treatment works, sewerage systems, or common sewers may be commenced until the plans and specifications are submitted to and approved by the department. The permit registrant must give notice to the department as soon as possible of any planned physical alternations or additions to the permitted facility. 2. Anticipated Noncompliance • The permit registrant must give advance notice to the department of any planned changes in the permitted facility or activity that may result in noncompliance with permit requirements. 3. Transfers SWM -DY -00473 December 2005 Permit Number: 1200 -C Expiration Date: November 30, 2010 Page 23 of 24 This permit may be transferred to a new permit registrant provided the transferee acquires a property interest in the permitted activity and agrees in writing to fully comply with all the terms and conditions of the permit and the rules of the Commission. No permit may be transferred to a third party without prior written approval from the department. The department may require modification, revocation, and reissuance of the permit to change the name of the permit registrant and incorporate such other requirements as may be necessary. The permit registrant must notify the depattiuent when a transfer of property interest takes place. 4. Compliance Schedule Reports of compliance or noncompliance with, or any progress reports on interim and final requirements contained in any compliance schedule of this permit must be submitted no -later than 14 days following each schedule date. Any reports of noncompliance must include the cause of noncompliance, any remedial actions taken, and the probability of meeting the next scheduled requirements. 5. Twenty-Four Hour Reporting The permit registrant must report any noncompliance that may endanger health or the environment. Any information must be provided orally (by telephone) within 24 hours, unless otherwise specified in this permit, from the time the permit registrant becomes aware of the circumstances. During normal business hours, the department's Regional office must be called. Outside of normal business hours, the department must be contacted at 1- 800 -452 -0311 (Oregon Emergency Response System). A written submission must also be provided within 5 days of the time the permit registrant becomes aware of the circumstances. Pursuant to ORS 468.959 (3) (a), if the permit registrant is establishing an affirmative defense of upset or bypass to any offense under ORS 468.922 to 468.946, delivered written notice must be made to the depattciient or other agency with regulatory jurisdiction within 4 (four) calendar days of the time the permit registrant becomes aware of the circumstances. The written submission must contain: - a. A description of the noncompliance and its cause; b. The period of noncompliance, including exact dates and times; c. The estimated time noncompliance is expected to continue if it has not been corrected; d. Steps taken or planned to reduce, eliminate, and prevent reoccurrence of the noncompliance; and e. Public notification steps taken, pursuant to General Condition B.6 The following must be included as information that must be reported within 24 hours under this paragraph: a. Any unanticipated bypass that exceeds any effluent limitation in this permit. b. Any upset that exceeds any effluent limitation in this permit. c. Violation of maximum daily discharge limitation for any of the pollutants listed by the department in this permit. d. Any noncompliance that may endanger human health or the environment. The department may waive the written report on a case -by -case basis if the oral report has been received within 24 hours. 6. Other Noncompliance The permit registrant must report all instances of noncompliance not reported under General Condition D.4 or D.5, at the time monitoring reports are submitted. The reports must contain: a. A description of the noncompliance and its cause; b. The period of noncompliance, including exact dates and times; c. The estimated time noncompliance is expected to continue if it has not been corrected; and d. Steps taken or planned to reduce, eliminate, and prevent reoccurrence of the noncompliance. 7. Duty to Provide Information The permit registrant must furnish to the department within a reasonable time any information that the department may request to determine compliance with this permit. The permit registrant must also furnish to the department, upon request, copies of records required to be kept by this permit. SWM-DY-00473 December 2005 Permit Number: 1200 -C Expiration Date: November 30, 2010 Page 24 of 24 Other Information: When the permit registrant becomes aware that it has failed to submit any relevant facts or has submitted incorrect information in a permit application or any report to the department,. it must promptly submit such facts or information. 8. Signatory Requirements All applications, reports or information submitted to the department must be signed and certified in accordance with 40 CFR § 122.22. 9. Falsification of Information Under ORS 468.953, any person who knowingly makes any false statement, representation, or certification in any record or other document submitted or required to be maintained under this permit, including monitoring reports or reports of compliance or noncompliance, is subject to a Class C felony punishable by a fine not to exceed $100,000 per violation and up to 5 years in prison. Additionally, according to 40 CFR §122.41(k)(2), any person who knowingly makes any false statement, representation, or certification in any record or other document submitted or required to be maintained under this permit including monitoring reports or reports of compliance or non - compliance shall, upon conviction, be punished by a federal civil penalty not to exceed $10,000 per violation, or by imprisonment for not more than 6 months per violation, or by both. 10. Changes to Discharges of Toxic Pollutant The permit registrant must notify the depai talent as soon as it knows or have reason to believe of the following: a. That any activity has occurred or will occur that would result in the discharge, on a routine or frequent basis, of any toxic pollutant that is not limited in the permit, if that discharge will exceed the highest of the following "notification levels: (1) One hundred micrograms per liter (100 µg/1); (2) Two hundred micrograms per liter (200 pg/I) for acrolein and acrylonitrile; five hundred micrograms per liter (500 µg/1) for 2,4- dinitrophenol and for 2- methyl -4,6- dinitrophenol; and one milligram per liter (1 mg/1) for antimony; f (3) Five (5) times the maximum concentration value reported for that pollutant in the permit application in accordance with 40 CFR §122.21(g)(7); or (4) The level established by the depaitnient in accordance with 40 CFR §122.44(1). b. That any activity has occurred or will occur that would result in any discharge, on a non - routine or infrequent basis, of a toxic pollutant that is not limited in the permit, if that discharge will exceed the highest of the following "notification levels ": (1) Five hundred micrograms per liter (500" µg/1); (2) One milligram per liter (1 mg /1) for antimony; (3) Ten (10) times the maximum concentration value reported for that pollutant in the permit application in accordance with 40 CFR §122.21(g)(7); or (4) The level established by the department in accordance with 40 CFR §122.44(0. SECTION E. DEFINITIONS 1. Technology based permit effluent limitations means technology -based treatment requirements as defined in 40 CFR § 125.3, and concentration and mass Load effluent limitations that are based on minimum design criteria specified in OAR 340 -04 I . 2. mg/1 means milligrams per liter. 3. Grab sample means an individual discrete sample collected over a period of time not to exceed 15 minutes. 4. Month means calendar month. 5. Week means a calendar week of Sunday through Saturday. SWM -DY -00473 December 2005 • NOTICE OF TERMINATION for NPDES General Permit to Discharge Storm Water Associated with , uEC1 Construction Activity Stale of Oregon Department of Use this form to end ermit coverage once all soil disturbance activities have been completed and final Environmental P g P Quality stabilization of exposed soils has occurred. Please print in ink or type. I. Permittee U. Legally Authorized Representative (Person completing this form if different from Permittee) Legal Name . Phone No. Name Phone No. Company Company Mailing Address Mailing Address • City State Zip Code City State Zip Code Facility/File ID (located on face page of permit) Title III. Site Location /Address IV. Status of Construction Activity Site Name ❑ All soil disturbance activities by the permittee have been completed. Street Address (or Location Description) El The site has undergone final stabilization of all exposed soils through vegetation or other measures Section Township Range and all storm water discharges from construction activities that are authorized by this permit are eliminated. City (or nearest City) Zip Code ❑ All temporary erosion and sedirnent controls have County been removed and properly disposed. Date above items were completed: Certification Please read the certification statement carefully before signing. I certify under penalty of law that all storm water discharges associated with construction activity from this site that are authorized by this NPDES general permit have been eliminated. By submitting this Notice of Termination, I understand that I am no longer authorized to discharge storm water associated with construction activity under this general permit, and that discharging pollutants to waters of the United States is unlawful under the Clean Water Act where the discharge is not authorized by a NPDES permit. I also understand that submittal of this Notice of Termination does not release a permittee from liability for any violations of this permit or the Clean Water Act. Signature of Legally Authorized Representative Date Name of Legally Authorized Representative (Type or Print) DEQ/WQ /SWM- RLN- 00452.doc (9/04) p. 1 of 2 Erosion Prevention and Sediment Control Plan for TriMet Washington County Commuter Rail Project in Washington and Clackamas Counties, Oregon JULY 6, 2006 Prepared by URS TriMet Washington County Commuter Rail EPSC Plan July 6, 2006 TABLE OF CONTENTS 1.0 PERMIT TRACKING INFORMATION 4 1.1 Site Name 4 1.2 Site Location 4 1.3 Disturbance Area Summary 4 2.0 EROSION AND SEDIMENT CONTROL PLAN INFORMATION 5 2.1 Client Information 5 2.2 Preparer Information 5 2.3 Preparer's Credentials 5 2.4 ESCP Plan Coverage Area - 5 3.0 PROJECT DESCRIPTION 6 4.0 NATURE OF CONSTRUCTION ACTIVITY 8 5.0 CONSTRUCTION PHASING 8 5.1 General Approach 8 5.2 Phases of Erosion and Sediment Control Activities 9 5.2.1 Pre - Construction Activities 9 5.2.2 During Construction 10 5.2.3 Post - Construction 11 5.3 Phases of Construction 11 6.0 BMPS AND LOCATION OF APPLICATION 12 7.0 PROJECT SCHEDULE 16 YEAR — 2006 17 YEAR — 2007 17 YEAR — 2008 18 8.0 FILL MATERIAL DESCRIPTION 20 9.0 EXISTING SOILS DESCRIPTION 20 9.1 Beaverton, Washington Square 20 9.2 Tigard and Tualatin 20 9.3 Wilsonville 21 10.0 PRECIPITATION TRENDS 22 Prepared by URS Page 2 TriMet Washington County Commuter Rail EPSC Plan July 6, 2006 11.0 SITE PLANS 23 12.0 MAINTENANCE & REPAIR PROCEDURES • 24 13.0 CHEMICAL STORAGE, CONTAINMENT & RESPONSE MEASURES 25 13.1 Chemicals & Similar Products to be Stored On -Site 25 13.2 Storage & Containment Measures • 25 13.3 Accidental Release Prevention Measures 25 13.4 Accidental Release Response Measures 27 13.5 Spill Response Contacts 28 14.0 ADDITIONAL COMMENTS 28 15.0 REFERENCES 28 FIGURES Figure 1 Vicinity Map TABLES Table 1 Summary of Disturbance Area Acreages Table 2 BMP Schedule Table 3 Inlet Protection Location and Application APPENDICES Appendix A ERO -A through ERO -Z3, Erosion Control & BMP Exhibits Appendix B Soil Maps Appendix C ODEQ 303d TMD.Sedimentation.Turbidity Listed Rivers Appendix D Grading Drainage and Erosion Control Plans from 95% Design Set/Stormwater Management Plan Appendix E BMP Installation Details Prepared by URS Page 3 TriMet Washington County Commuter Rail EPSC Plan July 6, 2006 1.0 PERMIT TRACKING INFORMATION 1.1 Site Name The site is known as the Washington County Commuter Rail Project. 1.2 Site Location The site is located in Washington and Clackamas Counties, from Beaverton Transit Center, Washington County, Oregon, to Barber Road in Wilsonville, Clackamas County. 1.3 Disturbance Area Summary Approximately 12 acres is planned to be cleared, excavated or filled. Table 1 summarizes the area of disturbance associated with the various elements of the project. For reference, Table 1 includes the drawing exhibit # in Appendix A, and the Grading, Drainage and Erosion Control Plan Sheet # from the 95% design set in Appendix D. Track stationing appears on both drawing sets. Within the project vicinity, there are no waterbodies listed as impaired for turbidity and sedimentation on the DEQ 303d list (see DEQ map Appendix C). As a result, special provisions for potential discharges to 303d listed waters are not applicable. Prepared by URS Page 4 TriMet Washington County Commuter Rail EPSC Plan July 6, 2006 2.0 EROSION AND SEDIMENT CONTROL PLAN INFORMATION 2.1 Client Information Prepared for: Jeb Doran Company Name: TriMet Address: 710 NE Holladay St Portland OR 974 Telephone: 503 962 -2168 Fax: 503 962 -2283 Email: doranj @trimet.org 2.2 Preparer Information Prepared by: Douglas Krause, PE Company Name: URS Address: 111 SW Columbia #1500 Telephone: 503 - 222 -7200 Fax: 503 - 222 -4200 Email: Douglas krause @urscorp.com 2.3 Preparer's Credentials Professional Experience More than 10 years of professional experience in site grading and drainage, water quality investigations, BMP selection and design, NPDES permitting, receiving water plans, stormwater management design and planning, groundwater quality assessments and reporting, floodplain and floodway analyses. Education. • Bachelor of Science (BS) Mechanical Engineering, University of Michigan, 1986. Professional Registrations /Certificates • Professional Engineer OR #73597PE. • Hazardous Waste Operations and Emergency Response certificate. 2.4 ESCP Plan Coverage Area This Erosion Prevention and Sediment Control Plan (ESCP) has been prepared for and is applicable solely to TriMet's Washington County Commuter Rail project. Construction activities would cover approximately 15 miles of railway alignment. This ESCP applies to the commuter facilities associated with the rail development project in accordance with DEQ's Erosion and Sediment Control Manual (DEQ, 2005). This ESCP was prepared by a Certified Professional Engineer licensed in Oregon. Prepared by URS Page 5 TriMet Washington County Commuter Rail EPSC Plan July 6, 2006 • 3.0 PROJECT DESCRIPTION The Washington County Commuter Rail (WCCR) project is a passenger rail service that would operate on a right -of -way that currently serves as a heavy freight railroad line. The commuter rail vehicles would travel between Wilsonville and Beaverton, connecting to the MAX Tight rail system at the Beaverton Transit Center (BTC). The commuter rail line would operate at 30- minute headways between the hours of 6:00 a.m. and 9:00 a.m. and 3:00 p.m. and 6:00 p.m. Sixteen round trips would be made daily using two -car trains. Opening year (2008) ridership is forecast to be 2,410 riders on an average weekday; year 2020 ridership is forecast to be 4,650 riders. The total distance of the proposed project is 14.7 miles. The commuter rail corridor and the proposed project stations are shown in Figure 1. The estimated capital cost for the commuter rail project is between $67 and $73 million. The WCCR would implement passenger rail service along a segment of existing freight railroad, within existing railroad right -of -way. Commuter rail trains would travel between Wilsonville and Beaverton, connecting to the MAX light rail system at the existing Beaverton Transit Center (BTC). The length of the proposed operating segment is 14.7 miles. Commuter rail trains would operate weekdays, running every 30- minutes between the hours of 6:00 a.m. to 9:00 a.m. and 3:00 p.m. to 6:00 p.m. Along the Commuter Rail route, proposed improvements to the existing freight rail tracks include: • Selected rail replacement; • Improvements to ties, ballast and road grade crossings; • Replacement or improvement of existing bridges: o Construct new bridge over Fanno Creek just north of SW Denny Road. o Repair existing Fanno Creek bridge (located approximately % -mile north of the Tualatin River). o Remove existing Tualatin River north approach structure down to groundline. and replace with new structure. o Repair existing Tualatin River south approach structure. o Remove existing Reservoir Bridge down to groundline and replace with new structure. o Remove existing Hedges Wetland Bridge #1 down to groundline and replace with new structure. • o Repair bridge over Grahams Ferry Road (this bridge is not located over or near a stream or wetland). • Adding passenger station platforms and furnishings at Beaverton Transit Center (integrating this project with existing MAX light rail and Washington County bus service), SW Hall Boulevard (serving the Washington Square area and utilizing 200 existing spaces on adjacent property for park & ride access), downtown Tigard at SW Main Street (including a 150 -space park & ride lot), downtown Tualatin at SW Nyberg Road (including a 122 -space park & ride lot) and in Wilsonville at SW Barber Street (including a 400 -space park & ride lot). All these improvements would be made within existing railroad right -of -way, utilizing the existing track embankment and ODOT right -of -way in downtown Tualatin. Also, all bridge work potentially affecting streams or other water bodies crossed would be conducted during the June 1 through September 30 window for in -water work on the Tualatin River and tributaries below Scoggins Creek. Prepared by URS Page 6 TriMet Washington County Commuter Rail EPSC Plan July 6, 2006 At the north end of the route, it would be necessary to construct approximately 2,000 feet of new track -way north from the existing freight rail tracks to reach the northern terminus station on the south side of Beaverton Transit Center. The new track would be paved and integrated with a reconstructed and partially realigned SW Lombard Avenue. Between SW Farmington Road and SW Broadway Street, the new trackway would cross fully developed (impervious) property currently occupied by a bank and paved parking lot. At Beaverton Transit Center, the commuter rail track would cross Hall Creek on a new bridge just east of SW Lombard Avenue, which will require placement of new pilings within the stream along with some dredging, resulting in both fill and removal, the area of which is as yet undetermined. At the south end of the Project route, a facility for commuter rail vehicle maintenance and storage would be constructed on the east side of the tracks and a transit center /park & ride facility on the west side. Alternatives Analysis The proposed Washington County Commuter Rail Project design reflects considerable effort to avoid placing new fill in wetland areas, particularly moderate to high quality wetlands, and minimize unavoidable impacts. As a result, the potential for erosion and sedimentation potential is has also been reduced. Avoidance of Wetland Impact As reported in the Washington County, Wilsonville to Beaverton Commuter Rail Final Environmental Assessment (Final EA) (Federal Transit Administration, January 2001), population and employment growth in eastern Washington County is overloading existing transportation system facilities. This is particularly true in the Wilsonville to Beaverton corridor. Local jurisdiction and regional transportation and land use policy recognize that no single transportation mode can be expected to accommodate all of the increasing travel demand and that wherever possible, better use must be made of existing transportation network elements. The Portland & Western railroad tracks paralleling congested Highway 217 between Wilsonville and Beaverton, present just such an opportunity. The proposed Washington County Commuter Rail Project would add a new modal option for commuters that would provide relief to the congested roadway network. Also from the Final EA, transportation goals for the Wilsonville to Beaverton corridor are addressed without creating a new transportation corridor or significantly expanding existing highways and streets. Not having to commit significant amounts of new land (and associated resources, including wetlands) to providing for new system capacity is the key factor toward avoidance of significant new wetland fill in the Wilsonville to Beaverton corridor. The Portland & Western railroad tracks are well positioned and under - utilized. Prepared by URS Page 7 TriMet Washington County Commuter Rail EPSC Plan July 6, 2006 4.0 NATURE OF CONSTRUCTION ACTIVITY General Description of Construction Activities Construction of the proposed project would include the following elements: • Improved public road intersections at 17 rail crossings with minimal disturbance except for repaving at Lombard (see Table 1). • 14.7 miles of Railway improvements at various locations as necessary, e.g. tie replacement, ballast improvements and alignment adjustments, will not cause significant site erosion, and are not considered in this ESOP. • Improved Railway Bridges at six stream crossings. (Hall, Fanno north, Fanno south, Tualatin River, Tualatin Res, and Hedges • 4 Park - and -Ride commuter facilities. • Limited Natural Resource Creation /Enhancement The construction activities would include: • Limited clearing and grading activities necessary to define the limits of disturbance (seeTable 1). Orange construction fencing where appropriate, or approved equivalent, would be used to define the limits of disturbance. • Installation of perimeter protection measures at the Park -and Ride facilities and at designated staging, parking, and office areas. Perimeter protection measures may include, but are not limited to, silt fence, run -on diversion ditches with stabilized outfalls, stabilized construction entrance, wheel wash, and elevated containment barrier /berm. • Site civil works including building pads and roads. • Utilities, including service water, fire suppression water, instrument air, service air, and stormwater management and treatment facilities. 5.0 CONSTRUCTION PHASING This section provides a detailed description of the phases of the construction that would occur and the erosion control measures that would be implemented during each construction phase. A detailed construction schedule is provided Section 7.0, including a list of erosion prevention and sediment control measures that would be implemented during each phase of construction. 5.1 General Approach Prior to initiating construction and related soil- disturbing activities, all erosion prevention and control measures would be implemented and inspected by the Contractor's Environmental Inspector and the Owner and /or authorized representative. Field documentation, including but not limited to, photographs and field notes, would occur prior to, during, and following installation of erosion prevention and control measures. Prepared by URS Page 8 TriMet Washington County Commuter Rail EPSC Plan July 6, 2006 At no time would construction work be allowed to occur without installation of appropriate and approved erosion and sediment control facilities. Initial soil- disturbing activities would be conducted for the sole purpose of installing approved erosion and sediment control BMPs and facilities. Project - related construction activities would begin only after implementation of erosion and sediment control BMPs and facilities. At a minimum, work area stabilization activities would include installation of perimeter controls (i.e. silt fence, or similar). Prior to the onset of construction activities, erosion and sediment control BMPs and facilities would be installed at the following project areas: • Construction Entrances • Storage and Stockpiling Areas • Off -site Disposal Areas • Contractors Field Offices • Designated Employee Parking Areas • Staging Areas The approved and installed temporary stormwater conveyance and treatment system would be tested for leaks and other imperfections prior to use for construction - related activities. Components of the system that would be tested include but would not be limited to, piping, culverts, inlets, outlets, treatment vaults, sediment treatment pond, level spreader, dewatering wells, and passive relief wells stormwater conveyance and treatment system. Testing would be witnessed and documented in the field by the Environmental Inspector. Testing methods and field documentation would be submitted to the Owner and /or authorized representative. Erosion prevention and control elements would be phased, as appropriate, to reduce the extent of soil- disturbing activities throughout the duration of the project. 5.2 Phases of Erosion and Sediment Control Activities This section describes the erosion and sediment control activities that would occur during the pre- construction, construction, and post- construction phases. 5.2.1 Pre - Construction Activities Pre - construction erosion and sediment control measures and activities would include the following: • To the extent possible, avoid or minimize soil exposure generated as a result of construction - related activities. • Plan for and coordinate required and suggested monitoring efforts with the Owner and /or authorized representative and the Environmental Inspector. • Discuss documentation procedures, requirements, guidelines, and other relevant issues with Owner and /or authorized representative and ODEQ. • Conduct limited clearing, grubbing, and other site- disturbing activities necessary to install appropriate erosion prevention, sediment control, and water quality protection measures, including required infrastructure. • Conduct mandatory project start -up training for staff, subcontractors and other personnel, related to environmental protection requirements for the project with emphasis on compliance. Staff training would be ongoing activity throughout the duration of the Prepared by URS Page 9 TriMet Washington County Commuter Rail EPSC Plan July 6, 2006 • project, including during weekly staff meetings and regular compliance inspections. Start -up training would be provided to new staff and subcontractors who missed the initial training, with an updated and current list of attendees maintained in project monitoring . notebooks. • Prepare the project monitoring notebooks and submittal protocol for use throughout the duration of the project. Update and maintain notebook contents regularly. 5.2.2 During Construction Erosion and sediment control measures and activities that would occur during construction include the following (for specific site and BMP details see Appendix D, 95% Design Set Grading Drainage and Erosion Control Drawings): • The contractor intends to assign the duties of Environmental Inspector to the Project Superintendent. The Environmental Inspector has the ability to stop work or require other corrective actions to achieve environmental compliance and to ensure adequate erosion and sediment control. In addition to monitoring the overall compliance and adequacy of erosion and sediment control measures, the Environmental Inspector would also be responsible for developing training plans and appropriate training materials, as well as training personnel in proper environmental work procedures specific to each task to be performed, and maintaining records of such training activities. The Environmental Inspector would also conduct refresher training as necessary to provide continued awareness of environmental work requirements on site. • Environmental Inspector to conduct daily monitoring and maintenance activities of installed erosion and sediment control measures.'. • Environmental Inspector of additional erosion and sediment control measures necessary to respond to changes in site conditions as construction proceeds, or other erosion and sediment control issues, should they arise. • Respond to erosion and sediment control issues within 24 hours. • Regular communication between DEQ, Contractor, and Owner and /or authorized representative regarding erosion and sediment control activities or issues that arise, if any. • Use of surface covering measures, including but not limited to, plastic sheeting, straw, or geotextile fabrics, to protect temporarily exposed soils. • Coordinate earthmoving and soil distributing activities to minimize the volume, surface area, and duration of exposure through project phasing • Adjust project schedules to the extent practical during inclement weather conditions to minimize exposure of soils to precipitation and surface runoff. • Maintain an adequate, covered, and readily available inventory of soil containment and treatment measures at the designated Stockpile and Staging Areas. Restock as necessary. • Install permanent soil stabilization measures (i.e. seeding) upon completion of construction activities. Stabilize and secure the site as the construction proceeds. • Where approved by the Owner and /or authorized representative, use cleared site vegetation materials as chip and /or slash berms for soil containment and treatment. Prepared by URS Page 10 TriMet Washington County Commuter Rail EPSC Plan July 6, 2006 • Provide surface runoff treatment system and emergency corrective procedures for soils exposed to runoff at the construction site PRIOR to discharge of surface runoff to sensitive waters. • Monitor and maintain all installed sediment control and runoff treatment systems to manufacturer's specifications, project specifications, or as necessary to comply with all project specification and appropriate Federal, State, and local surface water runoff and associated water quality requirements. 5.2.3 Post - Construction Post - construction erosion and sediment control measures and activities would include the following: • Remove, as appropriate, installed temporary sediment control and treatment systems and dispose of removed materials properly. • Inspect and confirm the effectiveness of installed permanent soil stabilizing measures. Reinstall or replace these measures as appropriate. • Request final inspection of stabilized areas by the Owner and /or authorized representative. • Create a final punch -list of items to be completed to ensure long -term erosion and sediment control at the site. • Respond to and remedy issues /items identified on the final inspection punch -list and gain verification of successful stabilization and site closure from the Owner and /or authorized representative. 5.3 Phases of Construction This section describes that anticipated phases of construction. Construction phasing may be modified as the design progresses, and this ESCP will be updated in accordance with those modifications. Following surveying, the areas and rights -of -way necessary for construction of all of the facilities would be determined. Initial clearing and grubbing activities would be conducted as necessary to install perimeter erosion and sediment control BMPs, followed by rough grading as required for the construction of all temporary drainage ditches, catchment ponds and other erosion and sediment control BMPs. Following installation of erosion and sediment control BMPs, site construction work would • commence. Clearing, grubbing and rough grading will occur at park and ride sites would occur to allow for safe passage of construction equipment and materials. This clearing and grubbing activity would generate approximately 5,000 cubic yards of soil and vegetation, which will be . removed from the property. Approximately 30,000 cubic yards of clean fill will be imported for the three park- and -ride stations requiring fill. The excavation and fill quantities for the bridge modifications listed in section 3 are approximately 300 and 500 cubic yards, respectively. All the necessary local and state permits would be obtained for proper placement, treatment and /or disposal of materials. BMPs would be followed to ensure that the disturbed area would be minimized, and to reduce the potential for impacts. Prepared by URS Page 11 TriMet Washington County Commuter Rail EPSC Plan • July 6, 2006 6.0 BMPs AND LOCATION OF APPLICATION Summary of Park and Ride sites and Beaverton Transit Center sediment control BMPs (See ESCP general notes — provided below) and Table 2 for complete ESCP information. Table 2 identifies the type of erosion prevention or sediment control BMP and the location of application.): o Install and maintain gravel construction entrances at all sites. o Install biofilter bags at catch basins and ditch inlets. Install insert bags without overflow slots at area drains. Individual inlets are listed with the inlet protection and ESCP drawing reference — see Table 3, Inlet Protection Location and Application. o Grade and construct the permanent water quality swales to be used for construction phase ESCP and seed and mulch for sediment control and turbidity control during construction. o Part of the runoff at various sites shall be filtered for primary and /or additional turbidity control via sheetflow through filter strips including following sites, Beaverton Transit Center, Washington Square PNR, Tigard PNR, and Wislonville PNR. See drawings. o Additional turbidity controls shall be met as appropriate via filtering through Chitosan Gel -Floc socks and compost/mulching at the downgradient end of the swale exit, and any disturbed soil area, as required. INFORMATION REQUIRED ON ESCP DRAWINGS 1. Hold a pre construction meeting of project construction personnel that includes the inspector to discuss erosion and sediment control measures and construction limits. (Schedule A.5.b.i.(3)) 2. The ESCP must be kept onsite and all erosion and sediment control measures shown on the plan must be installed in such a manner to ensure that sediment or sediment laden water that enters or is likely to enter surface waters or conveyance systems leading to surface water, roadway, or other properties does not occur. (Schedule A.3.a.) and (Schedule B.3.b.) 3. The implementation of the ESCP and construction, maintenance, replacement, and upgrading of the erosion and sediment control measures is the responsibility of the permit registrant until all construction is completed and approved by the local development_agency and vegetation /landscaping is established. The permit registrant shall be responsible for maintenance after the lots are approved, until the lots are sold and the 1200 -C permit is terminated. (Schedule A.4.a.) and (Schedule D.3.) 4. The permit registrant must be responsible for proper installation and maintenance of all erosion and sediment control measures, in accordance with local, state, or federal regulations. (Schedule A.5.a.) and (Schedule A. 6.a.) Prepared by URS TriMet Washington County Commuter Rail EPSC Plan July 6, 2006 5. Erosion and sediment control measures including perimeter sediment control must be in place before vegetation is disturbed and must remain in place and be • maintained, repaired, and promptly implemented following procedures established for the duration of construction, including protection for active storm drain inlets and catch basins and appropriate non - stormwater pollution controls. (Schedule A.5.b.ii.(2)), (Schedule A.5.b.ii.(7)), (Schedule A.7.d.i.(2)) & (Schedule A.7.f.) 6. Begin land clearing, excavation, trenching, cutting or grading and earthwork - surface roughing after installing applicable sediment, erosion prevention and runoff control measures not in the direct path of work. (Schedule A.5.b.ii.(5)(a)), (Schedule A.7.c.i.(1)) and (Schedule A.7.c.ii.(1)) 7. Apply temporary and /or permanent soil stabilization measures immediately on all disturbed areas as grading progresses and for all roadways including gravel roadways. (Schedule A.5.b.ii.(5).(b), (Schedule A.5.b.ii.(5)(c) & Schedule • A.5.b.ii.(6).) 8. Wet Weather BMPs: Construction activities must avoid or minimize excavation and creation of bare ground on slopes greater than five (5) percent from October 1 through May 31 each year. (Schedule A.7.a.i.) 9. Wet Weather BMPs: Temporary stabilization of the site must be installed at the end of the shift before a holiday or weekend or at the end of each workday if rainfall is forecast in the next 24 hours and each weekend and holiday. (Schedule A.7.a.ii.) 10. Identify, mark, and protect (by fencing off or other means) critical riparian areas and vegetation including important trees and associated rooting zones and vegetation areas to be preserved. Identify vegetative buffer zones between the site and sensitive areas (e.g., wetlands), and other areas to be preserved, especially in perimeter areas. Preserve existing vegetation and re- vegetate open areas when practicable before and after grading or construction. (Schedule A.5.b.i.(1) & (2)) and (Schedule A.7.c.iii.(1)) • 11. Provide permanent erosion prevention measures on all exposed areas to prevent from becoming a source of erosion and remove all temporary control measures, . unless local ordinances require otherwise, as areas are stabilized. (Schedule A.5.b.ii.(8)) and (Schedule A.7.c.ii.(2)) 12. All temporary sediment controls must remain in place until permanent vegetation or other permanent covering of exposed soil is established. Identify the type of vegetative seed mix used. (Schedule A.7.c.iii.(3)) & (Schedule A.7.c.iii.(4)) 13. Sediment controls must be installed and maintained along the site perimeter on all down gradient sides of the construction site and at all active and operational internal storm drain inlets at all times during construction. (Schedule A.7.d.i.(1) - (2)) 14. Prior to any land disturbing activities each site must have graveled, paved, or constructed entrances, exits and parking areas with exit tire wash to reduce the tracking of sediment onto public or private roads. (Schedule A.7.d.iii.(1)) Prepared by URS TriMet Washington County Commuter Rail EPSC Plan July 6, 2006 15. When trucking saturated soils from the site, either water -tight trucks must be used or loads must be drained on -site until dripping has been reduced to minimize spillage on roads. (Schedule A.7.d.iii(3)) 16. Temporary stabilization or covering of soil stockpiles and protection of stockpile located away from construction activity must occur at the end of each workday or other BMPs, such as diversion of uncontaminated flows and installation of sediment fences around stockpiles, must be implemented to prevent turbid discharges to surface waters. (Schedule A.7.e.i.(1)) & (Schedule A.7.e.ii.(1) - (3)) 17. BMPs that will be used to prevent or minimize stormwater from being exposed to pollutants from spills, no discharge of concrete truck wash water, vehicle and equipment cleaning, vehicle and equipment fueling, maintenance, and storage, other cleaning and maintenance activities, and waste handling activities. These pollutants include fuel, hydraulic fluid, and other oils from vehicles and machinery, as well as debris, leftover paints, solvents, and glues from construction operations. (Schedule A.7.e.i.(2)) 18. Any use of toxic or other hazardous materials must include proper storage, application, and disposal. (Schedule A.7.e.iii.(2)) 19. Solid Waste and Hazardous Materials Management. Follow project written spill prevention and response procedures, employee training on spill prevention and proper disposal procedures; regular maintenance schedule for vehicles and machinery; and material delivery and storage controls, training and signage, material (Schedule A.7.e.iii(3)) waste and supplies. ( a e areas for w ( ed storage use, cover g 20. The permittee must properly manage hazardous wastes, used oils, contaminated soils, concrete waste, sanitary waste, liquid waste, or other toxic substances discovered or generated during construction and meet all state and federal regulations and approvals. (Schedule A.7.e.iii.(4)) 21. The ESCP measures shown on this plan are minimum requirements for anticipated site conditions. During the construction period, these measures must be upgraded as needed to comply with all applicable local, state, and federal erosion and sediment control regulations. Changes to the ESCP must also be submitted in the form of an Action Plan to DEQ or its Agent for approval. (Schedule A.7.f.) 22. Significant amounts of sediment, which leaves the site, must be cleaned up within 24 hours and placed back on the site and stabilized or properly disposed. The cause of the sediment release must be found and prevented from causing a recurrence of the discharge within the same 24 hours. Any in- stream clean up of sediment shall be performed according to the Oregon Division of State Lands required time frame. (Schedule A.7.f.i.(1)) 23. Vacuuming or dry sweeping must be used to clean -up released sediment and must not be intentionally washed into storm sewers, drainage ways, or water bodies. (Schedule A.7.f.i.(2)) 24. The application rate of fertilizers used to reestablish vegetation must follow manufacturer's recommendations to minimize nutrient releases to surface waters. Prepared by IJRS • TriMet Washington County Commuter Rail EPSC Plan July 6, 2006 Time release fertilizers should be used with care within any water way riparian zone. (Schedule A.7.f.i.(3)) 25. Sediment must be removed from behind a Sediment Fence when it has reached a height of 1/3 the height of the fence aboveground and before fence removal. (Schedule A.7.f.ii.(1)) 26. Sediment must be removed from behind Bio Bags and other barriers it has reached a height of two (2) inches and before BMP removal. (Schedule A.7.f.ii.(2)) 27. Removal of trapped sediment in a Sediment Basin or Sediment Trap or Catch Basins must occur when the sediment retention capacity has been reduced by fifty (50)% and at completion of project. (Schedule A.7.f.ii.(3) & (4)) 28. DEQ must approve of any treatment system and operational plan that may be necessary to treat contaminated construction dewatering or sediment and turbidity in stormwater runoff. (Schedule A.7.f.iii.) 29. Should all construction activities cease for thirty days or more, the entire site must be temporarily stabilized using vegetation or a heavy mulch layer, temporary seeding, or other method. (Schedule A.8.a.) 30. Should construction activities cease for fifteen (15) days or more on any significant portion of a construction site temporary stabilization is required for that portion of the site with straw, compost, or other tackified covering that prevent soil or wind erosion until work resumes on that portion of the site. (Schedule A.8.b.) 31. Daily inspections when rainfall and runoff occurs of the BMPs and discharge outfalls must be the project ESCP Inspector. These inspections and observations must be recorded in a log that is available on site. (Schedule A.6.b.i.) & (Schedule B.1.b(1)) 32. BMPs must be inspected before, during, and after significant storm events. (Schedule A.7.f.) 33. All ESCP controls and practices must be inspected visually once to ensure that BMPs are in working order prior to the site becoming inactive or in anticipation of site inaccessibility and must be inspected visually once every two (2) weeks during inactive periods greater than seven (7) consecutive calendar days. (Schedule B.1.b.(2) -(3)) 34. If practical, inspections must occur daily at a relevant and accessible discharge point or downstream location during periods which the site is inaccessible due to inclement weather. (Schedule B.1.b.(4)) Prepared by UPS TriMet Washington County Commuter Rail EPSC Plan July 6, 2006$ 7.0 PROJECT SCHEDULE' Pending item: Fill in the year(s) and the month(s) at the top pf the chart during which the project would occur; check the appropriate boxes to indicate the items in the left column that would be performed and /or installed. See below information • ' Scheduling chart to be completed as design progresses p 96 Prepared by URS TriMet Washington County Commuter Rail EPSC Plan July 6, 2006 YEAR — 2006 MONTH: J F MA M J J AS O N D Perimeter Clearing X X X X Establish & Stabilize Construction X X Infrastructure EROSION PREVENTION: MONTH: J F M A M J J A T S O I N D Vegetation Preservation X X X X X X X Construction X X Entrance Construction Road X X Stabilization Mulching AS REQUIRED Scheduling Water Truck X X X SEDIMENT CONTROL: MONTH: J F MA M J J AS O N D Diversion of Run- X X On AS REQUIRED Wheel Wash AS X X REQUIRED Check Dam X X X X X X Sedimentation Pond AS REQUIRED Silt Fence X X X X X X Additional EPSC materials would be covered and stockpiled on -site within the staging area for emergency use and on -going maintenance activities. YEAR — 2007 MONTH: 1 J F M A M J J A S O N D -- Clearing X X X X X X X X Inlet Protection X X X X X X X X X X X X EROSION PREVENTION: MONTH: f J F M A M J J A S 0 D Prepared by URS Page 17 • TriMet Washington County Commuter Rail EPSC Plan July 6, 2006 Vegetation X X X X X X X X X X X X Preservation Construction X X X X X X Entrance Construction Road X X X X X X X Stabilization Mulching X X Water Truck X X X X X SEDIMENT CONTROL: MONTH: J F P M A M J J A S O N I D Diversion of Run - On AS REQUIRED Wheel Wash AS REQUIRED Check Dam X X X X X X X X X X X X Sedimentation Pond AS REQUIRED - Silt Fence X X X X X Additional EPSC materials would be covered and stockpiled on -site within the staging area for emergency use and on -going maintenance activities. YEAR— 2008 MONTH: J F M A M J J A S O ND INLET X X X X X PROTECTION _ EROSION PREVENTION: MONTH: J F M A J J A S O N D Vegetation X X X X X Preservation Construction Entrance Construction Road Stabilization - Mulching Scheduling Water Truck SEDIMENT CONTROL: MONTH: J I F j M A M J J OI S O N D Diversion of Run - On AS REQUIRED Wheel Wash AS REQUIRED Page 18 Prepared by URS • TriMet Washington County Commuter Rail EPSC Plan July 6, 2006 Check Dam X X X X X Sedimentation Pond AS REQUIRED Silt Fence X X X X X ] Additional EPSC materials would be covered and stockpiled on -site within the staging area for emergency use and on -going maintenance activities. Prepared by URS Page 19 TriMet Washington County Commuter Rail EPSC Plan July 6, 2006 8.0 FILL MATERIAL DESCRIPTION Imported fill material will consist of clean local fill, typically sandy material. 9.0 EXISTING SOILS DESCRIPTION This section describes the characteristics and erosion potential for the soils present at the Park - and -Ride sites. For NRCS Soil classification for the entire 14.7 -mile alignment, see Appendix B Figures 2 -7 through 2 -11 (from the Wetland Delineation Report — URS 2004). 9.1 BEAVERTON, WASHINGTON SQUARE The site is situated in the northern portion of the Willamette Valley physiographic province (Orr, et. al., 1992). Specifically, the site is located at the western end of the Tualatin Basin, a structurally down warped basin generally filled with alluvial deposits and underlain at depth by basaltic rock. Native soils beneath the site are reported to consist of the Aloha Silt Loam (Green, 1983). This is a somewhat poorly drained soil that forms in alluvium or lacustrine silt on broad valley terraces. The Aloha Silt Loam is described as typically consisting of a dark brown silt loam surface layer to approximately 8 inches, a subsoil of dark brown to yellowish brown silt loam about 38 inches thick followed by a substratum of mottled silt loam and very fine sandy loam extending to a depth of 60 inches or greater. This soil has moderately slow permeability and slow runoff characteristics. The available water capacity is 18 to 20 inches. Runoff is slow and erosion hazards slight. f Surface soils in the site vicinity consist of late Pleistocene -aged sediments comprised of complexly interbedded silts with lesser amounts of sands and fine gravels (Madin, 1990). This unit was deposited during prehistoric catastrophic flooding. The thickness of the sediments is highly variable but is estimated to extend to a depth of nearly 90 feet at the subject property. The catastrophic flood deposits are underlain by either late Miocene to Pleistocene Sandy River Mudstone Equivalent or Pliocene to Pleistocene Boring Lava flows (Madin, 1990). The Sandy River Mudstone Equivalent is composed primarily of moderately to poorly lithified siltstone, sandstone, mudstone, and claystone. The Boring Lavas consist of light gray to gray phyric basalt and basaltic andesite that was erupted from a series of local vents in the northern Willamette Valley. These flows were typically erupted over the Sandy River Mudstone Equivalent in the vicinity of the project area. The total thickness of these two units is 500 to 650 feet. The site is underlain at depth by basaltic rock of the Columbia River Basalt Group (Madin, 1990). 9.2 TIGARD AND TUALATIN Surface soils in the site vicinity consist of late Pleistocene -aged sediments comprised of complexly interbedded sands with lesser amounts of gravel and occasional cobbles and boulders (Schickler and Deacon, 1967). This unit was deposited during prehistoric catastrophic flooding. The catastrophic flood deposits are underlain by the Pliocene Troutdale Formation (Schlicker and Finlayson, 1979). The Troutdale Formation is several hundred feet thick and is composed of sandstone and conglomerate with beds and lenses of sand and cobbly gravel. The site is underlain at depth by basaltic rock of the Columbia River Basalt Group (Schlicker and Finlayson, 1979). Prepared by URS Page 20 TriMet Washington County Commuter Rail EPSC Plan July 6, 2006 9.3 WILSONVILLE The site is situated in the northern portion of the Willamette Valley physiographic province (Orr, et. al., 1992). Surface soils in the site vicinity consist of Pleistocene -aged Iacustrine sediments comprised of fine sandy silt and clay (Schlicker and Finlayson, 1979). This unit was deposited during prehistoric catastrophic flooding. The thickness of the sediments is highly variable but is estimated to extend to a depth of approximately 30 to 60 feet at the subject property. The catastrophic flood deposits are underlain by the Pliocene Troutdale Formation (Schlicker and Finlayson, 1979). The Troutdale Formation is several hundred feet thick and is composed of sandstone and conglomerate with beds and lenses of sand and cobbly gravel. The site is underlain at depth by basaltic rock of the Columbia River Basalt Group (Schlicker and Finlayson, 1979). Prepared by URS Page 21 TriMet Washington County Commuter Rail EPSC Plan July 6, 2006 10.0 PRECIPITATION TRENDS The construction area is situated within the Coastal Area Climate Zone, as defined by the National Climatic Data Center (NCDC). This zone is characterized by wet winters, relatively dry summers, and mild temperatures throughout the year. Occasional strong winds, usually in advance of winter storms, also typify the Coastal Climate Zone. Normal average annual precipitation ranges between 60 and 90 inches, with the highest monthly rainfall amounts occurring in the winter months of November, December and January (see chart below). The most intense storms (storms with daily rainfall exceeding 0.5 inches) also occur most frequently during these winter months. PORTLAND, OR TOTAL MONTHLY PRECIPITATION http://www.wrcc.dri.edu/cgi-bin/cliMONtpre.pl?orporl 25 -------- — - - — - — - 20 - 15 '— -- w -*- MAX v -.- MEAN 10 - 5 0 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC MONTH 2 ODEQ, April 2005. Erosion and Sediment Control Manual. Prepared by URS Page 22 TriMet Washington County Commuter Rail EPSC Plan July 6, 2006 11.0 SITE PLANS Table 3 below provides a summary of site plans and maps that have been or will be prepared as part of the project. Final site maps and construction plans are under development and will be provided upon completion (2 copies will be provided). TABLE 3 Summary of Information Detailed on Maps Submitted to DEQ INFORMATION PROVIDED ON MAPS YES NO NA a. The complete development, including any phases (Appendix A ✓ Exhibits). b. The areas of soil disturbance on the site, including areas that ✓ would be cleared, graded, and /or filled (Appendix A Exhibits). c. The areas of cut and fill (Appendix A Exhibits). ✓ d. The drainage patterns and sloped of the land both before and after major construction activities (see Figures, Stormwater ✓ Management Plan, Attached). e. The location of existing and proposed storm drains and outfalls ✓ (see Figures, Stormwater Management Plan, Attached). f. The receiving waterbody for the drainage from the site (Table 1). ✓ g. The areas used for storage or soils or wastes (see Figures limits ✓ of work, Stormwater Management Plan, Attached). h. The location of all erosion and sediment control facilities and /or structures (see Figures, Stormwater Management Plan, ✓ Attached). i. The areas where vegetative practices would be used (see ✓ Figures, Stormwater Management Plan, Attached). j. The location of existing and future impervious structures and areas (see Figures, Stormwater Management Plan, Attached). k. The location and name of all springs, wetlands, and surface water bodies near the project (see Appendix A Exhibits and ✓ Wetland Delineation Report and Report Addendum). I. The boundaries of the 100 -year floodplain, if known (Wetland ✓ Delineation Report). m. The location of graveled access entrance and exit and graveled parking areas to be used by construction vehicles ✓ (Appendix A Exhibits). n. The location of graveled roads traveled by more than 25 ✓ vehicles per day. o. Installation details of vegetative and other erosion control practices (vegetative buffer strips, seeding, mulching, erosion ✓ blankets, etc) (Appendix A Exhibits, and see Figures, Stormwater Management Plan, Attached). p. Installation details of sediment control practices (silt fence, storm drain inlet protection, etc) (see Figures, Stormwater ✓ Management Plan, Attached). Prepared by URS Page 23 TriMet Washington County Commuter Rail EPSC Plan July 6, 2006 12.0 MAINTENANCE & REPAIR PROCEDURES This section describes the procedures that would be used to assure prompt maintenance and repair of graded surfaces and erosion and sediment control measures. Maintenance and monitoring activities would be conducted by a Contractor- provided and Owner - approved Environmental Inspector to be responsible for day -to -day maintenance. Monitoring activities with routine oversight to be provided by TriMet. At a minimum, Environmental Inspector(s) would be responsible for the following: • Ensuring compliance with the requirements of this ESCP, the Procedures, the environmental conditions of the Certificate authorization, the mitigation measures proposed by the applicant (as approved and /or modified by the Certificate), and other environmental permits and approvals. • Identifying. documenting, and overseeing corrective actions, as necessary to bring an activity back into compliance. • Verifying that the limits of authorized construction work areas and locations of access roads are properly marked before clearing. • Verifying the location of signs and highly visible flagging marking the boundaries of sensitive resource areas, waterbodies, wetlands, or areas with special requirements along the construction work area. • Identifying erosion /sediment control and soil stabilization needs in all areas. • Ensuring that the location of dewatering structures and slope breakers would not direct E water into known cultural resources sites or locations of sensitive species. • Verifying that trench dewatering activities do not result in the deposition of sand, silt, and /or sediment near the point of discharge into a wetland or waterbody. If such deposition is occurring, the dewatering activity shall be stopped and the design of the discharge shall be changed to prevent reoccurrence. • Advising the Chief Construction Inspector when conditions (such as wet weather) make it advisable to restrict construction activities to avoid excessive rutting. • Determining the need for and ensuring that erosion controls are properly installed, as necessary to prevent sediment flow into wetlands, waterbodies, sensitive areas, and onto roads. • Inspecting and ensuring the maintenance of temporary erosion control measures at least: — on a daily basis in areas of active construction or equipment operation. — on a weekly basis in areas with no construction or equipment operation. — within 24 hours of each 0.5 inch of rainfall. • Ensuring the repair of all ineffective temporary erosion control measures within 24 hours of identification. • Identifying areas that should be given special attention to ensure stabilization and restoration after the construction phase. Prepared by URS Page 24 TriMet Washington County Commuter Rail EPSC Plan July 6, 2006 13.0 CHEMICAL STORAGE, CONTAINMENT & RESPONSE MEASURES This section describes the general types of chemicals and similar products to be stored on site. Included is a description of storage and containment measures to be used and response measures to be taken in the event of an accidental release. 13.1 Chemicals & Similar Products to be Stored On -Site Chemicals proposed for use on -site would vary based on the specific construction activity to be performed. As construction progresses, the list, amounts, manufacturers description, Materials Safety Data Sheets (MSDS), and other relevant environmental information would be compiled by the Contractor - provided Environmental Inspector and collated into the Project Notebooks to be maintained at the project site. 13.2 Storage & Containment Measures Chemical and similar product storage and containment measures to be used during this project, would include, but are not limited to the following BMPs: • Housekeeping — management of on -site chemical /petroleum products. • Employee training — mandatory to enter the project site. • Daily inspection /maintenance of equipment and storage facilities. • Equipment inspection — prior to access to the project site • Containment facilities — able to hold a minimum of 110% of the fluid volume. • Storage and stockpiling. • Specialized spill kits in equipment. 13.3 Accidental Release Prevention Measures Housekeeping Measures • Promptly contain and clean up solid and liquid pollutant leaks and spills including oils, solvents, fuels, and dust from manufacturing operations on any exposed soil, vegetation, or paved area. • Do not hose down pollutants from any area to the ground, storm drain, conveyance ditch, or receiving water unless necessary for dust control purposes to meet air quality regulations and unless the pollutants are conveyed to a treatment. • Clean oils, debris, sludge, etc. from all BMP systems regularly, including catch basins, settling /detention basins, oil /water separators, boomed areas, and conveyance systems, to prevent the contamination of stormwater. • Promptly repair or replace all leaking connections, pipes, hoses. • Clean up pollutant liquid leaks and spills in impervious uncovered containment areas at the end of each working day. • Use solid absorbents, e.g., clay and peat absorbents and rags for cleanup of liquid spills /leaks, where practicable. • Recycle materials, such as oils, solvents, and wood waste, to the maximum extent practicable. Prepared by URS Page 25 TriMet Washington County Commuter Rail EPSC Plan July 6, 2006 • Use drip pans to collect leaks and spills from equipment such as cranes, trucks and other vehicles, which are stored outside. • Require mandatory use of sanitary facilities; refuse disposal facilities; and, compliance with fire restrictions. Employee Training • Conduct mandatory project start-up training to staff, subcontractors and other personnel, related to environmental protection requirements for the project with emphasis on compliance. Staff training would be ongoing throughout the duration of the project and would be continued through updates at the weekly staff meetings and during regular compliance inspections. Start-up training would be provided to new staff and /or subcontractors who missed the initial training, with an updated and current list of attendees maintained in project monitoring notebooks. • Environmental awareness training for staff would be ongoing throughout the duration of the project and would be continued through updates at the weekly staff meetings and during regular compliance inspections. Start-up training would be provided to new staff and /or subcontractors who missed the initial training, with updated and current list of attendees maintained in the project Notebooks. No personnel, staff, and /or craft persons would be allowed on the project site without attending an environmental awareness training session. Daily inspection /maintenance Compile documentation regarding the MSDS, product descriptions issued by the manufacturer, and all other relevant environmental information for potential pollutants into the project monitoring notebooks. Equipment inspection • Conduct inspections of all equipment and /or other vehicles for leaks and /or other sources of pollutants prior to entry into the site. • Inspect equipment and other vehicles within the site for leaks and /or other defects prior to the beginning of daily work activities, repair as necessary. Containment facilities • Identify, document, and prepare specific locations to be used as temporary storage facilities while awaiting off -site disposal, for concrete and other imported potentially water- transportable materials. Monitor and maintain as necessary. • Collect and convey all on -site wastewater from equipment cleaning and /or maintenance activities to approved temporary holding tanks for eventual off -site disposal: Storage and Stockpiling Maintain an a_ dequate and covered stockpile of spill prevention and water pollution response materials. Specialized spill kits Prepared by URS Page 26 TriMet Washington County Commuter Rail EPSC Plan July 6, 2006 • Require equipment operators and project superintendents to maintain the appropriate activity -based spill prevention and water pollution response kit at all times. • Require operators to check for adequate supplies at the beginning of each work day, restocking as necessary. • Conduct an impromptu and unscheduled inspection for the presence of specialized spill prevention and water pollution response kits, with potential penalties for non - compliance. 13.4 Accidental Release Response Measures Petroleum Products In the event of a spill or leak, the INITIAL RESPONSE should be the following: 1. Isolate the hazard area and deny entry to unnecessary personnel. 2. Mitigate fire, explosion,-and vapor hazards. 3. Contact DEQ within 24 hours if more than 42 gallons are released, or if the responsible person is unable to contain or clean up the release within 24 hours, or if sheen is recognized on surface water. 4. Report to the Oregon Emergency Response System (OERS) any release of petroleum product which impacts surface runoff entering a stream within 24 hours of the release. Call 800 - 452 -0311, which is set up to contact all other local, county, state, and federal agencies. 5. Call the National Response Center (NRC) Hotline telephone number is 800 - 424 -8802 as a backup for notifying the proper emergency response agencies. 6. Immediate action should be taken to prevent further release. Employees should be aware of the following guidelines when dealing with a spill or leak: • Appropriate protection clothing and respiratory equipment should be used if the spill is recognized as hazardous. • In the case of a leak, the source should be identified and shut off — IF IT IS SAFE TO DO SO. • The area around the spilled product should be diked if the product appears to be escaping the primary containment area. • Excess product should be removed with pumps into temporary storage tanks. • Residue should be soaked up with adsorbent material such as clay, sand, or absorbent socks. • An authorized hazardous waste recycler should remove spilled product that has been pumped into temporary storage tanks and adsorbent material that has been used to soak up residue. 3 Pumps and attendant hardware and materials will be stored in the stationary emergency spill kit to be maintained on -site (see #6 Generalized BMP List under the Pollution Prevention heading). Prepared by URS Page 27 TriMet Washington County Commuter Rail EPSC Plan July 6, 2006 13.5 Spill Response Contacts Oregon Emergency Response System (OERS) • 800 - 452 -0311 (in- state) • 503 - 378 -4124 (out -of- state) Chemical Transportation Emergency Center (CHEMTREC) • 800 - 424 -9300 National Resource Center (NRC) Hotline • 800- 424 -8802 14.0 ADDITIONAL COMMENTS Other Permits Applicable to this Project Include: PERMIT ISSUANCE EXPIRATION ISSUING AGENCY PERMIT TYPE NUMBER 1 DATE DATE l DSL /COE Remove /Fill Pending approval City of Beaverton Land use Pending approval City of Tigard Land use Pending approval City of Tualatin Land use Pending approval City of Wilsonville Land use Pending approval 15.0 REFERENCES DEQ, EROSION AND SEDIMENT CONTROL MANUAL, April 2005. URS. Wetland Delineation Report. Washington Commuter Rail Project. (WD #2004 - 0217),. April 2004. URS. ADDENDUM TO THE 2004 WETLAND DELINEATION REPORT. Washington Commuter Rail Project. (WD #2004 - 0217). April 2006. Prepared by URS Page 28 TriMet Washington County Commuter Rail EPSC Plan July 6, 2006 TABLES Prepared by URS TABLE 1 Summary of Disturbance Area Acreage Disturbance Activity SWMP Excavation Disturbance Area Clearing (acres) (acres) I Grading (acres) Off Site Conveyance Receiving Water Exhibit Ref. Sheet Ref. Beaverton TC 0 0 0 MS4 Storm System Hall Creek ERO -A 01C30531 07C30531- Washington Square 0.1 0.1 0.06 MS4 Storm System Fanno Creek ERO -G 13C32531 Rail ROWNegetated 1.03 0.1 1.03 Channel Fanno Creek ERO -K, L 32 Tigard 20C30531- Tualatin 1.28 0.1 1.28 Rail ROW Hedges Creek ERO -R 32 Wilsonville SROZ Wilsonville SROZ 33C30531- Wilsonville 4.71 0.1 4.71 Wetland Wetland ERO -Z3 33 Park and Ride subtotals 7.12 0.40 7.08 Wilsonville Wilsonville SROZ Wilsonville SROZ 0.5 Wetland Wetland 34C30521 Maintenance Facility_ 0.5 0.1 02C30521- Lombard Street NA NA ERO -B 26 Improvement 0.1 0 1 Staging & Worker included Parking Area included above above included above NA NA Rail Corridor NA NA NA NA Tualatin Watershed Bridges /Stream Crossings 0.1 0.1 0.1 1 NA Tualatin Watershed Totals I 7.82 0.60 1 8.68 1 1 Notes: SWMP = Stormwater Management Plan, MS4 =EPA regulated municipality, ROW = Right -of -way, SROZ = Significant Resource Overlay Zone • TABLE 2 BMP Location and Application • PROJECT DEO BMP BMP NAME PRIMARY PURPOSE APPLICATION and NOTES NUMBERjt] PARK AND RIDE SITE EROSION PREVENTION - - Construction Reduce the amount of sediment Park and Ride construction site entrances. 4 Entrance' tracked off site by equipment and /or to 6 -in rock. BMP SC -10 Wilsonville PNR SEDIMENT CONTROL - - Prevent Catch Basin Inlet coarse sediment from entering Protection' drainage system. Installed at all catch basins urinq project. BMP SC -8 All Sites SEDIMENT CONTROL - - Prevent Area Drain Inlet coarse sediment from entering Install insert bags without overflow slots at Protection' drainage system. area drains. All Sites SEDIMENT CONTROL - - Convert Installed at the wetland boundary of the concentrated flow into sheet Flow for Wilsonville Park and Ride to reduce the Level Spreader energy and velocity dissipation. velocity and channelization of NA Wilsonville PNR SEDIMENT CONTROL - - Prevent scour and provide energy and Installed at piped conveyance system outfall Outlet Protection' velocity dissipation at stormwater locations. BMP RC -2 Tualatin PNR SEDIMENT CONTROL - - Detain the transport of coarse sediments Perimeter control and toe of slope. Installed at . Silt Fence' and provide energy and velocity all downgradient site boundaries BMP SC -1 All Sites SEDIMENT CONTROL - - Provide defined diversion path and /or Treatment facility used when to remove BioSwale' conveyance for stormwater to sediment and pollutants from stormwater. BMP RC -4 • All PNR Sites EROSION PREVENTION - - Used as energy and velocity dissipation and Reduces the transport of coarse sediment filtration for stormwater and /or turbid Tigard, Tualatin, Wilsonville Vegetated Strip sediment and provides stormwater runoff generated from site preparation BMP EP -2 PNRs SEDIMENT CONTROL - - Provide Existing and created drainage diversion velocity and energy dissipation in swales /channels /ditches. May be used as Check Dam swales and /or conveyance temporary and immediate stormwater runoff BMP RC -11 General Used to remove excess water from the active Dewaterinq SEDIMENT CONTROL - - construction area. BMP NS -1 General SEDIMENT CONTROL - - Used to Stabilized swale installed upslope of the intercept, divert, and convey perimeter containment barrier berm intended Diversion of Run -On upgradient - generated surface to divert upqradient run -on around the active BMP RC -3 General Minimize TSS SEDIMENT CONTROL - - Reduce Specific techniques to be determined or During In- Stream sediment entrainment or transport defined by the Biological Assessment and Beaverton Transit Center, & Construction from construction disturbances other environmental permits issued for the BMP RC -8 Tualatin PNR EROSION PREVENTION - - Proposed for use under certain Provide immediate temporary circumstances, at the discretion of the Mulching protection for exposed soils Contractor and Owner and/or their designated BMP EP -8 General • EROSION PREVENTION - - Proposed for use under certain Provide immediate, short-term circumstances, at the•discretion of the Plastic Sheeting erosion protection to slopes, Contractor and Owner and /or their designated BMP NS -9 General PROJECT COMPLETION - - Following project completion and /or Provide final soil stabilization completion of disturbances, • Seeding following completion of the project specified /approved seeding[2] would be BMP EP -6 All Sites EROSION PREVENTION - - Any areas of exposed soil within critical Soil stabilization Provide immediate protection for habitat areas will be stabilized as needed and and revegetation exposed soils immediately revegetated with native plants in NA General EROSION PREVENTION - - Export of wet soils or stone excavated from Truck Drippage Prevent drippage of sediment -laden the site is not proposed; however, in the event • Precautions water from trucks hauling wet soils that wet soil or rock excavated for the site is NA General tRUSiUN PRbVEN 11ON - - Vegetation Maintains existing soil stability, At the boundaries of the active construction Tigard, Tualatin, Wilsonville Preservation provides sediment filtration, area to be used as perimeter control. BMP EP -2 PNRs Note: • Shown on ESCP Drawing. • TABLE 3 Inlet Protection Location and Application • INLET NAME ESCP DRAWING SHEET 5 INLET TYPE: CWS STANDARD INLET PROTECTION: CWS STANDARD SITE BTC CBI 01C30531 CATCH BASIN: CWS CG -1 BIOFILTER BAGS: CWS 4 -24 Beaverton Transit Center • BTC CB2' 01C30531 • CATCH BASIN CWS CG -1 BIOFILTER BAGS: CVVS 4 -24 Beaverton Transit Center • BTC CB3 01C30531 CATCH BASIN CWS CG -1 BIOFILTER BAGS: CWS 4 -24 Beaverton Transit Center WSO DI1 • 07C30531 • DITCH INLET: CWS REF. 250 BIOFILTER BAGS: CWS 4 -24 Washington Square PNR TIG CBI 13C30531 - CATCH BASIN CWS CG -1 BIOFILTER BAGS: CWS 4-24 'Tigard PNR TIG CB2 13C30532 CATCH BASIN CWS CG -1 BIOFILTER BAGS: CWS 4 -24 Tigard PNR TIG C83 13C30532 CATCH BASIN CWS CG -1 BIOFILTER BAGS: CWS 4 -24 Tigard PNR TUAL 011 20C30531 DITCH INLET: CWS REF. 250 BIOFILTER BAGS: CWS 4-24 Tualatin PNR TUAL CBI 20C30531 CATCH BASIN CWS CG -1 • BIOFILTER BAGS: CWS 4 -24 Tualatin PNR • TUAL CB2 20C30531 CATCH BASIN CWS CG -1 BIOFILTER BAGS: CWS 4 -24 Tualatin PNR TUAL CB3 20C30531 CATCH BASIN CWS CG -1 BIOFILTER BAGS: CWS 4 -24 Tualatin PNR TUAL CB4 20C30532 CATCH BASIN CWS CG -1 BIOFILTER BAGS: CWS 4 -24 Tualatin PNR TUAL CO5 20C30532 CATCH BASIN CWS CG -1 BIOFILTER BAGS: CWS 4 -24 Tualatin PNR WILS A01 33C30531 AREA DRAIN: CWS TYPE II - FILTER SOCK INSERT: CWS 4 -25 Wilsonville PNR WILS A02 33C30531 AREA DRAIN: CWS TYPE 11 FILTER SOCK INSERT: CWS 4 -25 Wilsonville PNR • WILS AD3 33C30531 AREA DRAIN: CWS TYPE 11 FILTER SOCK INSERT: CWS 4 -25 Wilsonville PNR WILS AD4 33C30531 AREA DRAIN: CWS TYPE 11 FILTER SOCK INSERT: CWS 4.25 Wilsonville PNR WILS AD5 33C30531 AREA DRAIN: CVVS TYPE II FILTER SOCK INSERT: CWS 4 -25 Wilsonville PNR WILS AD6 33C30531 AREA DRAIN: CWS TYPE II FILTER SOCK INSERT: CWS 4 -25 Wilsonville PNR WILS CBI 33C30532 CATCH BASIN CWS CG -1 BIOFILTER BAGS: CWS 4 -24 Wilsonville PNR WILS C82 33C30532 CATCH BASIN CWS CG -1 BIOFILTER BAGS: CWS 4-24 Wilsonville PNR WILS C83 33C30532 CATCH BASIN CWS CG -1 BIOFILTER BAGS: CWS 4 -24 Wilsonville PNR WILS CB4 33C30532 CATCH BASIN CWS CG -1 BIOFILTER BAGS: CWS 4 -24 Wlsonille PNR • Nole: • Existing Inlet. PNR = Park and Ride Facility. • • TriMet Draft Washington County Commuter Rail DRAFT EPSC Plan April26, 2006 APPENDIX A Erosion Control Exhibits ERO A — ERO Z3. & Park - and -Ride Erosion Control Plan Drawings Notes: 1. Exhibits show complete track alignments. Fill for new track is shown as dotted centerline. 2. Exhibits show outline of park- and -ride stations. Detailed erosion control plans are attached from the 95% design set. 3. Erosion control fencing is shown as continuous line with x (------ - - ---- x -- - -). 4. See Appendix D for draft 95% Erosion. Control Plans. 5. Erosion control BMPs along trackway are not shown in following exhibits. All disturbed areas will include erosion control fencing and additional appropriate BMPs. Prepared by URS • , t ie t i 4 t = ;� 5 • } s r Y y 4 o l . 1. s F F a # 4 , r r � ; x tc , / ' Existing R R Track i {{ t 3 4 3 7 ! , " 1 ?' d t C f t � t T` 4- f.' , ; 14 4 - '-.4-74.9 y i . ry r f n I� ., � - x r 1 ° l :. € £ * . .. , � • .. , 1 f e ,. 'r � • 1 0- s J. ��i Highways -' r t z r 7 E t,n -. ",, -, . at ' �. ` f , z � - 1 cl ! d t t r 1 1 Light Rail 7 ▪ t_ , J S % r i• t y3a4 t rt j v .. lI t "', a .J t M er � l i fi S k £ 2 r S 5 L s F >? t -, f l F .il � ¢go ; i r t --: x �r a � ,s x t e--\_, Rivers t • �. s k r `tr / -. t �, x Q. 'r ,-- I r Y -- ._.Z, I f ,. - 1 ' f r t.7, t t K I t f t .. y r�'i 4x tt, t rtl t t Fanno Creek t F r. ' 4 f I 7 r ` ` • IS k r��_I rM J. _t ti / ,F 'f ., ._ -ir1 I I t its 5 '.s r a Y r lIt , t� y s { \) t F-3 " - _ 1 � r - � � f r t a � Y � y'.�.+r i1 � �' l' . � -S � i r F Cltles f "3L („,,,,:,=, j i_ � I I , # _ .r ..'^ s-I U.o..a .. f-d�. • z -.I 3�i f ! 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Pro e ' l - J Proposed Lower Fanno Creek F es,, � =4 t n Wa � ; ! Multnomah ; , i r cotlnly l ir C oun ty � -r ° W etland Mitigation Site r / :f � .� f � ,, f (12 Acres) • c �J l: Slleryryuo _ _ Q roJect . Clackamas 4, 1 Locatio' County ,i' ; a 1 Oregon u OTE: Map ' rotated 90 degrees west for display purpo Z 1 • VI a INITy MA-p TriMet Draft Washington County Commuter Rail DRAFT EPSC Plan April 26, 2006 FIGURES Prepared by URS y t a .. s S le. . g , x+11 • ✓ a } t Y _ r � / + ar s 4 . ,f Y a „ 1 1?..' x ✓f +; <S t i at i "r 4 yl 1' r x. }G II �l 1 " • o- ' j t Nrt>c ; a y`r Y is 4i..r fit. 1 -1 ' • / ', � ryr ', i, • . _ ' rS . "- 5 ^^ � ''',A441-., F 4 1 !1• : 3}� A yg , 'j,', t. ll �. f 3 sY?�1' 1 r 4 1F [ ' �t �q 1::.'" * �+ Sx fig, r'�' < < , � r. 'i f /P } / h 1 ii F( � A z r� k1 yr l T' M. d .pl 4k § .y f r a �43F� 4 �' BEA' ERTON i 4 c �` w , ,� 4f , M � ,I �, .:,.,17.'!1,:,.. _,;. 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HOLLADAY STREET PORTLAND, OREGON 97232 SECT 1 ON 4 — PROJECT DRAW 1 NGS DRAWN DESIGN CHECKED APPROVED: I DATE: 03/31/06 SCALE: _ 'FILE NAME: CONTRACT NO: SHEET NO: s K. . j 4 t ' - 1 r ,i� 4-* A • w y G n ,,,. ► �� .ge s jtr,1;,- • , '''' i . ''' .,„;.- ,,:,,,,, 4:.,..-14 .14, ,.,.. . 4411 ‘i . tiii ',A :.;.!: ' •:,::„,-- ' . ', ' : .:, . : , • . . 41v - ..ii, -: 1 - lir .. 5 �,,/ �/' 9 'F •X , 1 Zh O V 1 • • 1 / 'f 6 ' _ S rs it ' S,e p s ✓ ",rte°' • _ - � T f - A ...4'':'t a ' '� a d . . • • • + •tips •�: -4,,,; {.. :IT �L° \-- ___,,... :, .. :„ 1 -,..r ' • . -;.:.-:.".. ', '''' e. , „„......,....:„.... ,, . .,. .,,, , ..... . ...s,... ..... ° , ‚— . TYPES OF D f S = ''' '', . -' . ■= , ‘ - ' \ ,.., h; I r _.. n - ( it V 9 • � t Y d i � �' 11. q ''t s � ` . y L 1"ti s E� + • • 1N A J - . a n .: y �r 1 tit d f . y ; 1 t f . 'F, 3 J. Ott x A tr r' 51 I�. _ ;9, L I.,;,dd:£' .n 1 C: • dC A ?L � 4F 5 ' F't n ' ,. ! 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J a < -c G; ,,,.•� t y I r l r t s Nn� �c y a S .r t rRt F�Ji `"- t) J > i . yn l / F s: $-Zr c . f f"; • wir Ra l p } t) 37B ', i,!<' ®' M .a' t 4, '''4.-,='-',... • f 4 /1/ 7 SB r i,, �, x .��� "n ;; !a fi t .� r • 0 adF 1�w d u i 1 J e - t �� J f1�. 3 J � �, � ♦ ' i. ,�'a, F , \ e i y , L Z., 4 — 7 r 7 C,.P 13 ^t V ° y t r y ' , p { ( ' '•. 1 � 7 4 , � 1' y ttuM1 r � ., 2 ff ,) •, s. e ft (, it c, ; T �., f f -,,... — .. �, , ! i; to h k ; Z .'d. 2 2 j ti 1p ' - / 45 B... - rt , ' .k$ i 1 : / 1 45A - - ,j,1ra , h1 -..5 L • l'..•.'; l �42-":"\-..‘ > • „ ,, r s • t , 6' � tiiY.J �' z- � „ , • t �`�` r ; � ` 1 inch equals 1,000 feet a� t `\ w 'N r s 3 1 - 1 , Feet 1 4-;;',‘,- • ,\ t \ . �/ `i} 1 :i „% ° f � \ q Vu . r . j ` S . ▪ - VVk „y a -. '. , 37A • }� ~ } a ” ` /• ti 0 500 1,000 1,500 2,000 t n �• yak 1 j 2 +' 1 „ 7 '” �� „458 _ 1 : � • '' k P I o � ' i � L 1 _ � "� � �i , � ,,. 7 .s } . ...� / , � y f , • « r " // � a q- 1 1 ; •' , 9 ' t ) 1 ' / y ' -.6 : r S l Z i (� r • ! \, 4---4.4'.4'L:".-... —L . �a• ``, s J n �,, Stud A rea 4 47 r1 .. A '11'. \ , .. j b • ! p l Ki - `, y +) 4 ' ` , -m 1 5. • _ o-L'i� _ ' '\ +.. tr e rr - y +'' 3 %B, 1� • S . ' ▪ - • �/ Existing Track t c r y - ,1 T Y ' I w -- • ti, r .: : _ !1 - f ', F • l ., f '..\,..;\,-_,;,;,,,,,•::, rr NRC SOIIS 378 I '. sYt .r 7 111, � � . s � e tt ? t ^� r 4z i " 1 1 iIC t } yy v;. ,, N Soils • ( -, � I! _ f • t- a 942, yll ' 7 `r , a ' W f ` x 4. 3z -'' i y f r a1 / 1 ., .1 • t i t l, . „ ,,' aY ,- t a —rf - a 1 - 1 i i , 4 #`'�i' /' �' Soil Series Within the � ft 1' , r j „ 11 '"4' y , . i 3 'y f �. X Project Area (Figure 2-e): ' , 7 y,,� 1 r _ .458 `, 5 "i ra , - •,), WASHINGTON COUNTY 1 I '-� i 1 • Aloha silt loam J� ti - 4 / , - , • • t " f a . � * t f 1 rv , as �" Ii .1r 13 - Cove silty Gay loam' • r S t - 7C P • •\ 3 i _` 1 : 1 ' r l !�.Y . 4 ' t ;22'..:1 'I +- , 14 -Cava day , f 378 t'. ;} x 'S r ra1' `r ` , '" f i t r to I } '. ,./ 21 C - Hillsboro loam, + a � I 1 f A ▪ i T ig� ,;,, : � ' r "° , _ r .n • r 7 to 12 percent slopes �� 1 F S f ," • =-t •� "42 +rz �4l 1 '"0.:1',„:;',. Z 210 - Hillsboro loam, -, r _ •,, l j� r {j- 4 5 ( -+ 12 to 20 percent slopes • 37/j I r'S ` y ,P� r -;;44`4.'44•141''.1 22 • Huberly s 111 oam' • � ! 1 /i iR cti s.. j f 1 51 i4 - , .• i . • , - ,,,,22 / 4 , • 37A - 12 to 2 a loam, ! 1 tti r J P 0 to ] p ercent slopes / �{ 1 h �; 113 r > �'S T ; }�S 'rit , }' 3 +• 378 - auatam loam, • , + f l'. _ ,1 � ' • 3 107 p ercent slopes �CI '1 I ' ` 't i .k1 7B , a 37C - Ouatama loam, ( I S : r 4 dil .. � 4 :,45A, .� ; 7 l0 12 Percent slopes . : ! I . t ? 37C 1 ' "lI' S ' - 4 4458: 2 Verboort silly day loam' ..,..'...-• \ \ ¢ 1 '` „" 3 Wapala silty Gay loam' f 11 °' t 11C rt • \ 1 ? .: - Woodrum sat loam, <• a • ;'.:1.?."`" ' / r r ' ' + _ ` t !1 S,,,,!•11';',,, 3 to 7 percent slopes . _ II 1 • .r a. 218 '21C . i! I l l' f f ' , ' f ; t l Nt 1 E.? = Hydric l e �` t k r ewc.w FILM 76 30 f • �' J ,1 r 1 1 , 0. � f,1 sn..., w,.,, »_,,,,,,on,....„, _,,,,,,on,....„, Soil sW"... t+ w .,.s .r 1, 't j 1 ' ) ' _ b t } ', 4.f,�' 1kj1,� t , r �r�( 378 ' 1; • - tiT, r l t 3irt '' I 1 1 , " - r f tl l fj k4 1.1r • • ' 78 c Y. ! C, mtt. 1.4X` `�� 1 n • 12 L` 1 a t x bd 46F�, i j 1 I a ,47.13:.''.';'',::: ' '. •r^ s 4,3' 1.' �,rs, i m ijY. ,,l• ., ,,, 37A 4_ I 7 B � 22 if f r � ha 1 �'4a 1 I F = r '';;T:047/0,,-.,1;;41-- 1� ? t 37A • .tom � I • t. l i l r 'a :,11•,.... rk 1'' .1,,,,141.,44:7-f, uL a +r s ` 69 ` ' '. 1 �' I 1 101 � 'L , ;, a 1 f ' • v y i `., r ed r .4 1 ' siA » -r•R • `": /q • ; OBI 1 ,�.r'' 4 / a l .� c t ,; r14 1 M 1' ? _, _ a , f r ) yr • w D y , l y -,i,.;;;...,..-1.;:171'--;,.. . 21., r 4 ' /. ":j. 4 , h w �4 � " 7 • " :1::!;:!;: T C � x r A, i a') /r u 2' l '. :1C 1 j�' � ...- f n � q �. 1 • ' t t ' . / /� . tI) xz. a t 1 '� — • ' y l � l i 3 2 3 8 �1 1 ° t �i�ti�` I - r .n1 t ' la ,. rl 37A i • 3 7: .JSI , o Ja1 1 k i x' e� � ,. f ry 1 l A r ., Figure 2 -8 lip ,7.,,,..,..4i":,,,,,,,,.. - , : ry \ 378 ? f ; 7 r° i ' j t�I. w'pC+�+ s t/ 1 2 a - . { 25 NRCS Sods • 3 C < . � ._ - 7 r 84 r l ... _ .___ ,and H vdric Soils z 21C 3 \ 3 Y. , t jr > r 43 ,,, Z ,- ::: - .: ,- .1'::.:-..-4 ! .., 4B 76B i , r ,� - ! T; r �\ ` 3 4 22 \ • .i •93E r / • u t rt t rg2 \ � � 1 • 1'J , . , F '•", `' W to • < -1 r � � k ' e 6 ' . , «\ r o, Beaverton , Y r .� rt . \11 Comm 6 1 � � __. ` � _ ) - ..ifiv ' . ^'� 'h �1 1 1' Vi l L x. :j w £ j a - 6 3'S4 r 216 • . i } P• IJJ R,`sS -7''''-'-'•"'" n 1- ..14;7-..-;:,„`:.',`-'','r r� � 7 fi '1 t - • r. rr � . ) '2,Sr8 �J - I4 lk \ s �'1 y ,lx` 4P L / ., R a i l • 1 /; is . 'L l .. *o ? �, � u- 1 1i S � i � �7,",ni t ( "7 �! � r • F r 22 , / f t '. t, r t ,). ^v s` C 5 r r �L c; 1 14 11 f 41 i 1 i> J ti ;st 4 s ( 1 . -'' r IS � li t } - rl a.." w`` , F � ''!k U i r Y i �( SC -1 . i D r J e , r , k I° l J 1 r d r _ f / 1` I 58 . ' . • 1 5A 4 5 B •- y rl . � , f - r'' , ' t I _ t i s i '4 30 � l Earl r ✓• � r7 `� g �$ ,-1 y 1 inch equals 1,000 feet ' +.; Y I + 1 r , t`' s . fj ' s" '' , �r 1 ' . .- Feet . , '1 -- ; \ -. } S { 1 t ,', \ • } : Yr.n. 'f' , : � - � , � t . _'< ; 0 500 1,000 2,000 v 3 4 q \ 3 M r'I i b «£ �� • •�� 1 i ; r q3, \ „,,t;%,. t r 1 w ` ? r t :., r S ra s' � ;k r J � '` �f � 7i • Study Area r_ 1 ,: r r * 1- 1L . r ” ' t>t r , 27 " 5 r, o a v il • to 37A \ 2 : + 4 ` ▪ 1 u alc ' / ` 9 ` . ` 4 , ^� Existing Track , i i „,, r c .,•'.;. Y q ? NRCS Soils f -. v ix 9 6 J; r 11. ' - 4. I *' 3 ' Q r 11 ; :a. HYdric Soils 1. 4 y ,L . - i3 78 ' �. 30 z a V r �� 3 • / N► 0 , t t . . r F ti Soil Senes'Nthin me { 4 ' ' 1 � _ .,{""" r��y . - - l• t •�l s Project Area (Figure 2 -9): r? 21A cJ ti. S'' )",l r 30 F) WASHINGTON COUNTY � i ( � '' � r 4 . 376 1 : t d u .t 4 r - 1 t t 4 1 • Aloha silt loam , ...1 � \ { dI !. 13 ," tit +J S a ' 2• Amity silt loam { 1 . } w C y 37I1ti F� p`14 a , .1 &� A k y 13 • Cove silty day loam' 1 _ .r . - f }`Z , \ \ ✓n 1 't i T, f'd� - } ?r371 1 pl a y 5;i 14 •Cove tlay 1 e 218 F a� ® t >, v, 4 3 a 21A • Hillsboro loam, • I, , �\ l-+ I 1 y fJl 0 to 3 ercent slc es t,,;�tr J1 -1 ` =. - v 14 7 b >�1 r @ 218 - Hillsboro loam, 4:-.•'•'' r" I e 7A � i y . F 4 ,; 5i dab r ; } `' 3 to 7 percent slopes J 21C - Hillsboro loam, 4 a 37A 1r : i N T I ` . w --. - J., 3 71 7 to 12 percanl slopes ?. ..1 / 1 r l v h• .°Z P - •�, JM '' 2710 9 ` t 3 /� ;- 1 ` 22 - Huhery silt loam' / s 1 r4 " ( q r t 1 3 4 - h' 1 - '' f ' 27 • Laoish mucky day' 21B I ) '1 1 l \ �7 D' � _ Mc Bee silly day loam a3 l' _ -) , • 21A 218 a307,,,,-, - O ualama lo am, • '� 1 1 1 3 e. r 1 = - /r 37C , 0 tc 3 45¢90! slopes ,,14 r r ;::I;.:'.. M1 a Y 1 A 5 h t 37 ^� / f -;'::1,.:-.:;:17'.::7% 'r 37B - Ouatama loam, .- 5 �� r !c' t , k r \ti 3 � , • ' }�+ 3 to 7 percent slopes J/ w d r 1 t r -1. ; Y v - �;. / 37C • Oualama loam, • - r f l I h ( , . ,' A ..11,'..-. 37 i -- 21C� ` � ; tr 7l0 12 percent slopes , r y -,, ., ` ^ ' \• 43 - WaPato silty clay loam' s / r J ; r 1 .� . 1 h f' 1G ■ 46F - Xerachrepls and Haplo- ti K r j 216 '' -•• it t., e. ` xerolls, very steep � ^ r J • V n IIII . . \ = W - Water i ;' ✓, - f VI r - w. ,� ...,.3. t , - .0-,!---s, -.1, . ! _ t S \\ y (•' Hydnc snip Sot... gLIS fZ r:q`r 14 r }� r... ; J ' w +.i.v..co...r sus.. -..y, H { 11 :hr ro o- / 1 / ,• f I t +^ sou u,m. . Y- ti t '!,5'.''''' - r a l 4 ra rr ,l '� � 218 4 • 43.,. 1 43` " ` 1 ,...'",� � : +0 F • c R '1,'-:', :.'"".- . `1` * -� 3 .. r ,N ! �, 1 t1 {* 37 , 23. 9'6 ! f- r , i : +` P ii,- 'T + • S '.r -" h ,.,0 r ! `/ y 45A J r ;( f pir 27,. 216 + %3,':-:;,,---3- z Ir i . ' `l AI r y dl -„ r :l� 45B • • Figu 2 9 a ` 1r 7 ) F re 1 j ;� B ° 216 . 'I . . 2.1. t . 1 3 1 A,.. NRC Soils 1 : c 21A ,' �� • ' 2 1A I ly ric oils �' , �� - , : o o ,� . . - ', .� -,; a d S �t 21A • 21C 1 �: I L I 1 t_ 5 1 1 :,. m F 7 t �-- -. I 7 5_ _ 2.x y .. 216. , 2ra u % t 1 , •._ 2 I- s '711 _ „,ii,....,:,...:.--3i-.0,....,4..... J �.ytl - `}� l_ r t /I i. Beaverton s �.-G Q d . II ,, t r P __ `` » 21 = 6F, ■ ,�— Wilsonville to Z1C 11 �r 2 f ,..„.. 37C 21 a l 1 378 + A + (� + 1 ' ' a 1 1 rsd �. -.�22 c ,; S • Ya _ I{ _ r..'4" .- Commuter .11 i a. (.l „.. .• ,. 8 1 I l i j } 1 7 • 21A ( _'� r t . e 43 � U �� z 1 Rail . 3 �it� 1` 2 ';,,,,,v44-41.11 i ° " t t { 1 . t + r r v S y 7 Jl� I 11 e ^ �� - ' : C �I f .1c..7,,;.:,`,-„,:f...,--, , 38CT` t t 1 - .», ♦ .s a�,�, '` . ' � • 1 V t : f , av c 38 B. t F p y i t ` ' l � - 5i l 2 1 C... �'- f ` . 38E J } � 4 1... ; ' t !.' 'r � 8a rr } Y P ` . { I ' r fF , � .•1 }i ft 1 'ft �i i, • � 1 . (41-,.. �s 1 1Z8 . y lr 1 _} 11 ` 1 `ti, I r }. F " I . +1 1 • w „ 1 , c � 21A __ I A:3.1 4 . + 'T'u 1.: 5 . i Ilr h5Q r�l I ! 1. ; + r 38 C' ` is s i 37C } 1 1 1 1 1 1 �_, E f I \ ! J f '_ ` t 1 1'r �38C; ,y �' r` ' rz ,, { Ir j ).,..;,.;,/,.,..-__-• ` , 1 inch equals 1,000 feet r t �� I) 1 I x , , — 1 f S y '' . Feet • 4 E u r + tlir ▪ I y1 t P 4i rl� ( /r 0 500 1,000 1,500 2, 000 Ip c 1 ' L r I + I • 1 � ., t , ;; . ; tl . y + } tl `,+ i a y f I } 43 r t . tf 1 ~` � �I 5D f t t ; i1 - � a r I ! _`� + ,R Ir 5 r r C 1,388 Study Area i 1: SC r - ( ! � - 1 is 4 }t �. !: ...,..y.,..1,,,.........,„:.,.....:,,,.,01,, )i-f( AS 3 88 l ,4 r !( { �,� 0. 1 1 i ' • 13 it 1 I J ; � : h :i �. Existing Track r It y n � r. l t +• f tJ,S - - r - _ trr , } ' 1 � Il t . t 8 • ` r . 384 e 1 rti 4 $ . NRCS Soils t I 0 '1 ,I ; k ll . - It 1 I t ; te 1 8 �• _ 1 l f 38B t C t I 5 e �� 3 1 � 1 ♦ T 7i y � t 1 l (: •,`�, .N So • 1 . { r ) l + T` a ■ I `< j r j 1 L ` � � C' • as 1, bl �� t; T r T 1 + �� I.t r ydric 30 � .:I IIa r ▪ ?� t ) �." ti. i ', n 1 1 f, , 1 t Soil Series , f , 1 . 1 N -i1 +'( } } 1 k - r �1 i a t it , 'As {, Within the R i ( I J 1 t ll +5 (i } ... } r� n a t 1 �;, ' . j t 4 Project Area (Figure 2 -10): 11 + i It+ + [ t I V 1 fl. ^I� ... r, 1• I�wt It 4 ( I' _ 6 -- 1 - r ' t ,, � r f 4 ' J { , y r ,, WASHINGTON COUNTY • a 6 ` 1 {r t 4 - 8 - - -' , J r- ( -CSr y4 y 1 •Aloha sil loam 1 a , 46 , �) I (:444.,-1,:.:::•;..• 't t I p 1 r ,,,,,:.j t q r� � , 4 8 - 8rie : : : : : apv l i l i,, s scir i l t loa m , i -IV } � , Y l r 1 �1 + 56 'i. ! -nag ' J T. 007 pe slopes '�' t - f 1 1 } -` ' I 1- 388 5 38 01 t I F 5 • Brie1) sto ny silt loam, 628 - , �I I • ~ ' t i 1 I r S • +` t a1 J I - 1 t. d ��-a 0 t ce s lopes } }' Y f. I al r r i 5C - Brie s ill loam, 25 r ; ' • 1 }:� I I n ''' - 1 . .5 . F tit r ,� 7 l p slopes I t r 1 j SB I v 1 �, } 13 - Covay loam' 1 ;'� t 3 r t f a • r - i l f t 1 ']I ��: JT• 21A - Hillsboro loam, 1 1 1 ( t 4 �' - V I �l 0 to 3 percent slopes ,! ! t • I ":"4 T ' t } T: Ir .,�Y * 218 -Hillsboro loam, 93E s s 56 D I t 1 n - 2 • 3 } I f F 3 to 7 percent slopes a ., Z I t * 1 M1 _ '' � . - c:i.43 r yx 210 - Hillsboro loam, �,/ p s• 12 to 20 percent slopes M + ' c —' S .. 4y I S r .,jQ { ,¢ 37A -0 atama loam, '.1''.'!', { •,� f` (fl r " 4 .. I I:Ph �: 0 la 3 s per slop p es 1 + t • 1 i d‘ l: _ + 1 Y I 38C -Saum sill loam, $ ' I tt } ' I i 1 } + lp 7 to 12 percent slopes • 1) (;,) _ , } �5 i f , � t r ) j I ' k ! 7 38E - silt loam, •- P . V. 1 > �( �' 4 • f ' ° 7 20 to 3 0 percanl ste slopes Q -1 • 1 7 1 '- y +I — — 43 - Wapata silly day loam' ' l { Ir b 1 I i `• v R 48F - xemc hrepls and Haplo- • 4 0 :,::.11.,:1!,::1!!":.,:'.1j.: 5 �� ']' ° i 1 J + --�_ � 4 xeroll ry e 7 } SC • ': I I F f 1 A -r j r yt t � W •Water i } - n SC 1 - J Y - 7 ; r " t ° t ; • 788 -Salem sell loam, CLACKAMAS COUNTY r +I 1 ' a 127 i • SA i > • 628 1 f, s , - J 1,;7 '" 4 0 to 7 percanl slopes i r , � • ( r = J ;+T1 78C -Salem mlt loam, '+ f 1 J •. 'I - • ..777� 7 to 12 percent s lopes 0 , r { / S t 1 •.... - l i 1 1 ` /J �. 58 � ~�3 � (� = Hydric sail) 25 { F • l� M I 1 I S.vui Rl 9 •_ ra t u ti t o - " _ I ' w+u c,,.. sa s,.•. a ° . ° , v aaa„n,. c...m sal s• 43 s y w 4B }kt1 SB fi 3 1 t W� /. rx �4_. `' { .,, . 3,- S se..l t0 . • 780 r1 h J l l 5: l •-.t L } ' ! V : `� --,-� v • (0 _ zr• e: f n� 1 . • - ` r 5 . ,"i k .,_ \\ ,4 II �p - Li� S' r,- -.'4'. l _ 1 S r J' y ` 4c. i } Q Bl 1` � ' a 'i,_rl�� I n' i t \ C �:Ja'C q�`. t , rw✓' r. \ KAM n 11 4 tie F r I1 a , " I ' a Jf ! ,, Figure 2 -10 4 ■ 1 ° - 9E f` 9� 4, e i 768 �l776 , 538 .. c l+` ' +1� e. 71B 7 N,�� I 1 NRCS Soils „_. '_' :,,.f._. and Hvdric Soi % _ R I I r a * I . ` 1 r t rr . • LI F $Bd is I ,., t �I � 456 , 1 •r _ .q. • (' q 1 F43 . } 7 . T f av 'r ., 1 - • z ` 46 &V 45 r } 1t" r 8D • / ▪ y d r " % �, - II 7 S ./1-,{.- .45A i I � � - II - �, {r:. _ .. ,w r :_�. Wil sonville to 2Z b Pr1 _�,r, < r — "-- 4B I i $B - . - T �r , ` ase . Y•; t l l • I t ,, P; � �� r� — Ra i • r �( r i. f, );!...:-"`:....\ r ry _ \\ \ _� l y r. I, ' 1,i' 77 Ill r: � � A I ; :.�,v. { Is,- r, (. RN ail ` r � 1, i il. t'+ 71B ' y � vl 1 f, I : ' 1 II r +` ..7.4.,1;,...-.7.;...:7,, -� ,� ,,` r76B: , - � I r•- 1 .r -- - y11 I 76 ii , 18 r�` . .� � r^ 3n a `� E i , -. , ;.t L y ▪ ,r ttt k w f ?� 1, l ,,d i I `� PA, ,r _t !,Y' � 'a�l11 s d .r V't : r t r _ y 4 t x -1 , — [[ 1 F r ' '.!.."..:,4.,1 * 1 - 1 r \\ .".*;.;:-.,:i',1•• ' 1A ' ?-f — - as r'i t. � :' ri II � � t if � ,. r 1 I ... 1 , F i 1t � . , t�. 1 + I QI } ST y ' tf rd d 1 L 4 t l . t I I. ' n. - ar 1 , j ; i , f . ,- ? { ' F 3 2F } f I r I� f 1 A tr 1 inch equals 1,000 feet t L a l s 1 , ! 1 77 i � 1 Y F Feet r v 7 1A L,� • ( ,} 0 500 1,000 1,500 2,000 r _ - f t < fi,y, t 5' f1 5 f rs i {� .,I,n C f • r ; II l e t ' ; r I 1'' i P x r x 16 ' S w s t, _r , 2 9 ,' i' -S 1 r 888' , ( t .. . fl 4, Y 4 C ra r � SJ , t . L . . + , . ,� �` u11 I j - 1 f' I. -(''i..;',.' 1B.. FT Stud Area g n t y ) iy, 1] 1 ' � r ' \ I i 1 y - 3 " -_ .� *^ t I , I \ is J , , � I , 1. kt • I i - Existing Track IP 3 ' i I t ^C r i .s I,� • ° -{ T 1 k i r ` � I l �: i� � ' _ � - t 7t T 1 , NRCS Soils r' n 4v y l - 111 . JJJ i ' ',. ' d S .Y ^ <S 1 r _ '1A.� i � - tt ._}r _ t�� '7_^.'. . r C' +G/1'�9; }f' e N ! 1 ! S j Y s ` , 1 , 9 16 „ I 18 i l9 ` t a J ° ° 515 * }iydric Sails r iv ▪ i I 1 .h'�� r l t1' 1 i l i' ' tg t (t t i l l l i sY sG t t � .. f .t. I S 1 y �; t ` l l • d\ �s ^^ Hl 1 .!..r..'" • ' t � rli t t I III 1 � y u43Y l , 9 18 5.f r ` +r t �� z, r +K l r v S � , _ ..- " ! 1 -y � Soil Sanas Within the Z r • - -( I y ! 3 Project Area (Fig 2 -11): L L rt . K f r _ 1 ` 1 p • I n ( a 8 ' + 1A' 1 1 .r "11 .. ---••• ( - C1.4CKAMAS NTY i t ' d . f' - • i .? ` 1 9 F YB - t 1 1 _ 6 • Aloha sill loam x t $ >'} d e i "F a f , , 768 - Salem sill loam, `t ( ) 0 to 7 percent slopes 1. ' S r ti [ . S t r�l 1.A } i T 76C -S al e m silt loam, 1 4 ,� �� ', 1 1 • 1 1 �( 7 to 12 percent slopes • } d H� 1 n Y '• , 1 y'. • 8fiA • Wt llamelle sill loam, t 1 s. ' i' c.41 , ` 1 1 4 c y 0 13P ercent slopes t �.^ n 4 y : i • �r i j f ::::::',.".41 a �� ,• 88A - Willamette sill loam, wet, 91 r 1 4 s r , — i ., 0 to ] percent slopes t > , I 1,,":, g � ' 1 ` 4 i e. v -- - i' 888 - Willamette sill loam, wet l - 4_ I � 3 to 7 percent slopes ' ( I 4 )l�' 7 „, -- - ` 91A • Wootlhum silt loam, ', 918-_ --) I .1 _ �, Iff t - rtr - I" ' : 0 to 7 percent slopes 7 ) " J ,�! 1 � 918 - Wt o o per ill loom, 3 86� ^r 1 I f , !S 9 11 B 1 B percent slopes }� r r 1 Yt 716 ,�: -1 1fI I �88A _ , -- 91C- Woodburn sill loam, q1p I i f "'• �_l , ti S II 1 ` �% 92F - xer8 to 15 percent slopes A y oUrepts and Hapto- l i . 18 f r 1 serails, very steep 868 r I 1"--'''',4-...;_. 1 -- :: I 1 e71 ;` i. 86A 8 Il. If B 1 s : 0 �I.,�1 '14 1 s /�J tit 1 S It 86A 4 _ 8 I — e 11 i f u..- I ' 1 f, /rit l 7r € i , 9�C 71 r -e {, f �s ' r r Cr,' , II - '. t;..,,:' , I 1 . r ,f s { 'I I� t v 8 I c 1 J 33A , 1 f ;d jt ,,ti " t 1 I' 3 ! , ' I 2 ( t ,I . id ,` ., 1 )---111 �88A1 Srf+ n 93,1 11 Jfl1 ��I i 1 1 r ' ▪ pt 7 t�i {{ V T d 'Y r I J � 1 f- a 71A . i 3 A ; .. } r F R j' j .. (' r L ^: S6A t $3B I � } ' , , j a j .3 r y J ' I 1 .i ar - �t • : '' } 1 7 Q j { . * 71 B 1 ' lu' ■ I1A 11 ' T f 1 , II I 1 rrrv ( f ! • ? a ZF , .-_, 1B $388 9ZF- q II s :f ' , B 2 t F 86A • y 11 1 , I !� ' 1 3, ' +: . ali t f , t l h. , r � Z 86A 1 � I I l i , 4 "' a t 1 F 2 -11 f 1 69 tri I� } 53A I 16: NRCS Soils S6B '', ..' ' ., and Hvdric Soils TriMet Draft Washington County Commuter Rail DRAFT EPSC Plan April 26, 2006 APPENDIX C ODEQ 303d TMD Sedimentation Turbidity Listed Rivers Prepared by URS 1. • s, , - 303(d)- listed and TMDL- approved Waterbodies•for Turbidity and'Sedimentatian �.r s{1 I t c �-r . , r P "x + I l a -9 r R•^� i ^f ' 1 Z 1,14 . 9J r t ih -^ -? ,1:s J tS t t , , ,,,. • r s &' 1 "--„'A . _ r. r 1 k t , `t` u t r -'M' t o ` T ,K I ' ti " � . �„ „} - / f � S,�'ri f + &i- � , �!' Lr e e!rt 1 . FS,.. Y rti_/ P IK . h -i.. x , 1 1 s c. I �.� T Y i^ r a 1 ,1 l. 3 7- � p (r T`d . .-i s i is' .r � tii ,4 ,� h1 ..... �,, _ - i _ y - v r �i i I u - .' I r1• t " i `?"' n Ii „�, .>!1.. ,, a c 1 Y j l C 5 � 11r 5 j } 3 " t r+�� 4 V * J'mr r. ' afi. I '� � t • A ❑�` 4, f it 'i5 t 1 '7^ ry . t.i Q.- ,J' S., r q r AFP z 'AO ii:;TR irN "�. 3' A F� u').J i i tt i`� 1A1� 4 ? .. 14 � - r P 1f C 4.n 'it x s r �Jtr-b..!'F `� !'- 4) �l `'S a , , �� � � � S`t ����`'^`'.' 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F°`� d '�' r (y t, r 7t t I 4tN 'Et'i s�-il' W' �� r Y �lt .�r' C � h Ixf' a.` 1. "'444! IL 'E L�'l.,,f�. t i t.., +�) 1J' t't A7' �irY. �jlr ' "I J �1 1 e � (] 54...-°'" S >�' + Y E. r c ? al &ritl 1'} ill ^r d'' r r 4 SI+^`*T' f itk 5� +.' ' - h ..sN:11 Llr ..,.:.J7 1 - .. 3 , 'r ' rb'7 °:E� yt4 t' ', � t r ,1 + I t ' e. . tit " s �I., .2.e tip z ' t I e I t Y r- a. G . J. + x :e a r k ;t (:i il.Ift t: q.ji, F .V.11* ., `� , „ a I� "ttYr,t 1. k c} K� �a?�tr';,r �y 2� I ir'Cy ' ` � `�,t�� ° Yu '�'�1•'� !' L p YI. I 3 X�` a r r. i� 1 ' , -.'' -9 F tit, it 14 .µ { 'r `t y r a` . .FI n 8 n P)„ b .+l L' f' r I 5, t * I r` k . G "'+ a fi 2' ` - 'l 'N'S- F '! t x.i A[ 7r, i1": �"� 4 ,ft J J.q Y t 2J . c f .,r ) s4 a rf ' S 7 r . I , i_ 7t 1 T ts.-.. ,e41 •5 4X5' ", � ue4 €," + t PC + 1' R :, wit h. 1q t• 7 " J ., f + .,s 1 '� ,. x « r `'or M 5 x. 'dr 1 r e a 1, e a I �= , 4 t 4.... F ..,+ i •ail l . .- .+h sc h Uz+ + ,, y 1 5 : 1 °..a fi r, xlr yy�� '' '. _ •' ..!f! .; ._. D .. ... ... . �.. .. .r 7 S '� { n , wc1>: J3Y .i aR. ..F - fr�tw,.. , - ,,..�. IZO Mau ==........_r- ...w:,r:;`. -ii L—___._____ __ -.__. 1 inch cgnls to milaa r` »,,._.,....,- f 303(d) and TMDL List for Sedimentation and Turbidity (September 2005) List Waterbody Name Sub Basin R.M. . Parameter Season Listing Status Date Beaver Creek APPLEGATE 0 to 8.8 Sedimentation 303(d) List 1998 Camp Creek BURNT 0 to 6.9 Sedimentation 303(d) List 1998 Geiser Creek BURNT 0 to 4.9 Sedimentation 303(d) List 1998 Patrick Creek BURNT 0 to 1.3 Sedimentation 303(d) List 1998 Trout Creek BURNT 0 to 8.8 Sedimentation 303(d) List 1998 Deschutes River CROSSES SUBBASINS 168.2 to 189.4 Sedimentation - 303(d) List -1998 Deschutes River . CROSSES SUBBASINS 163.2 to 189.4 Turbidity • Spring /Summer 303(d)List 1998 Deschutes River CROSSES SUBBASINS 1 -89.4 to 222.2 Turbidity Spring/Summer 303(d) -List _' "1998 Deschutes River CROSSES SUB ..189.4 to 222.2 Sedimentation. . 303(d) :List .- 1998 Grand'eRondeRiyer ,::! ,:, r ;. CROSSES.SI7BBASINS ; '363: t6 80 7 ?: Sedimentation ;l.r 07i.'5303(d) tiist; . ; ,r ti 4998 Gratide'Roride =River , _ ; CROSSES `SUBBASIi IS +` 162 4 tol'200 6' ': Sedtmentatton 4 `` , 1! 1 9 z 4 01DL Approved 2002 Grande Ronde . `i f °'CROSSES SUBBASINS . . ? 200 6 to=204 8'; Sedimentatton ,,0; "', „ " i4j:gl TMDI'r:A'pptoyed „' : 2002 Granite Ronde.River _: CROSS ES'• SUB BASINS' -? . !. :A ' 80 7.to'� I "' Sediiiientation 1 ?:• ? ,. f T 1 ,t, " TEL : Approved f;; '20(12: Gate Creek LOWER DESCHUTES 0 to 14.3 Sedimentation 303(d) List 1998 Rock Creek LOWER DESCHUTES 0 to 15.9 Sedimentation 303(d) List 1998 Chesnimnus Creek LOWER GRANDE RONDE 0 to 26.4 Sedimentation 303(d) List 1998 Elk Creek LOWER GRANDE RONDE 0 to 13'.7 Sedimentation 303(d) List 1998 Eightmile Creek MIDDLE COLUMBIA -HOOD 30 to34.5 Sedimentation . 303(d) List ' - 1998 ' ' Eightmile Creek . MIDDLE COLUMBIA -HOOD 0 to 30 Sedimentation - 303(d)'List . 1998 Fifteerimtle Creek ;' MIDDLE' COLUIv1BI : A- HOOD' ;-; 0. to 32.2` :, . ,,; Sedimen a tatto :,;;:': :.; . 303(d);T,istt:, r,.,, rfi 1 =-. ;;4998 Fitteenmile'.Creel. ` MIDDLE ',COLUMBIA`-HOOD 32:2,to h= Sediment'atton l,m x M .c?^ t 1 303(1).Lrst ,' , 1 „ s „' 1198 Fivemile Creek MIDDLE COLUMBIA -HOOD 0 to 17.9 Sedimentation 303(d) List 1998 Ramsey Creek MIDDLE COLUMBIA -HOOD 0 to 13.2 Sedimentation 303(d) List 1998 Reeder Reservoir /Ashland Creek MIDDLE ROGUE 4.9 to 5.4 Sedimentation 303(d) List 1998 Alder Creek NORTH FORK JOHN DAY 0 to 5.5 Sedimentation _.303(d) List 1998 Baldy Creek NORTH .FORK JOHN DAY 0 to 5 Sedimentation • .03(d) List 1998 Big Wall Creek NORTH FORK JOHN DAY 0 to 21.3 Sedimentation 303(d) List 1998 : Bull Run Creek NORTH FORK JOHN DAY 0 to 9.3 Sedimentation 303(d) List 1998 Granite Creek NORTH FORK JOHN DAY 11.2 to 16.2 Sedimentation 303(d) List 1998 Hog Creek NORTH FORK JOHN DAY 0 to 4.1 Sedimentation 303(d) List 1998 Porter Creek NORTH FORK JOHN DAY 0 to 7.4 Sedimentation 303(d) List 1998 Swale Creek NORTH FORK JOHN DAY 0 to 11.1 Sedimentation 303(d) List 1998 _ Wilson Creek NORTH FORK JOHN DAY 0 to 10.7 Sedimentation 303(d) List - 1998 Canton Creek NORTH UMPQUA 0 to 10 Sedimentation 303(d) List 1998 Cavitt Creek NORTH UMPQUA 0 to 10.6 Sedimentation TMDL Approved 2002 Horse Heaven Creek NORTH UMPQUA 0 to 6.3 Sedimentation 303(d) List 1998 Jim Creek NORTH UMPQUA 0 to 4.1 Sedimentation TMDL Approved 2002 Little River NORTH UMPQUA 0 to 25.4 Sedimentation TMDL Approved - 2002 Little River NORTH UMPQUA 25.4 to 30.2 Sedimentation TMDL Approved 2002 Little Rock Creek NORTH UMPQUA 0 to 6.6 Sedimentation 303(d) List 1998 Steamboat Creek NORTH UMPQUA 10.9 to 23.4 Sedimentation 303(d) List 1998 East Fork Goose Creek POWDER 0 to 2.7 Turbidity Spring /Summer 303(d) List 1998 Elk Creek SILETZ- YAQUINA 0 to 29.5 Sedimentation 303(d) List 1998 Drew Creek SIUSLAW 0 to 3.2 Sedimentation 303(d) List 1998 McLeod Creek SIUSLAW 0 to 7.4 Sedimentation - 303(d) List 1998 Morris Creek SIUSLAW 0 to 3.9 Sedimentation 303(d) List 1998 North Fork Siuslaw River SIUSLAW 0.4 to 27.3 Sedimentation 303(d) List 1998 Porter Creek SIUSLAW 0 to 4.9 Sedimentation 303(d) List 1998 Taylor Creek SIUSLAW 0 to 2.3 Sedimentation 303(d) List 1998 Beaver Creek SOUTH UIv1PQUA 0 to 2.1 Sedimentation 303(d) List 1998 Jackson Creek SOUTH UMPQUA 0 to 25 Sedimentation 303(d) List 1998 South Umpqua River SOUTH UMPQUA 80 to 102 Sedimentation Year Around 303(d) List 2002 Auger Creek TROUT 0 to 6.5 Sedimentation 303(d) List 1998 Big Log Creek TROUT 0 to 5.5 Sedimentation 303(d) List - 1998 c.,.. -r Bull Creek TROUT 0 to 1.8 Sedimentation 303(d) List 1998 ' Cartwright Creek TROUT 0 to 4.3 Sedimentation 303(d) List 1998 Dick Creek TROUT 0 to 2.2 Sedimentation 303(d) List 1998 Dutchman Creek TROUT 0 to 4.8 Sedimentation 303(d) List 1993 Potlid Creek TROUT 0 to 5.2 Sedimentation 303(d) List 1998 1 of2 303(d) and TMDL List for Sedimentation and Turbidity (September 2005) List Waterbody Name Sub Basin R.M. Parameter Season Listing Status Date Trout Creek TROUT 0 to 507 Sedimentation 303(d) List 1998 Beaver Creek UMATILLA . 0 to 6.4 Sedimentation TMDL Approved 2002 Boston Canyon UMATILLA 1.5 to 4.7 Sedimentation Year Around TMDL Approved ' 2002 Darr Creek UMATILLA 0 to 3.4 Sedimentation TMDL Approved 2002 Line Creek UMATILLA 0 to 3.9 Sedimentation TMDL Approved 2002 Little Beaver Creek UMATILLA 0 to 3.8 Sedimentation TMDL Approved 2002 Lost Pin Creek UIv1ATILLA 0 to 1.3 Sedimentation Year Around TMDL Approved 2002 Meacham Creek ;a r .:: TJMATILLA."r..:, r i .* 18 'to35.5 `°i;;.:Sedimentationi r TMDL ?Approved - ;2002 {L fi t. {J Meacham :Creek, ::.•, „ ; UMATILLA , + , .: i,,4 5 `to 18 ,' , t. : S'edtn entatton:' YearAiound ;:, :' TMDiLApproved ; ' °2002 Mill Creek UMATILLA 0 to 3 Sedimentation TMDL Approved 2002 North Fork McKay Creek UMATILLA 1.5 to 7.8 Sedimentation Year Around TMDL Approved 2002 North Fork Meacham Creek UMATILLA 0 to 11.8 Sedimentation TMDL Approved 2002 Rail Creek UMATILLA 0 to 4.7 Sedimentation TMDL Approved 2002 Sheep Creek UMATILLA 0 to 4.7 Sedimentation TMDL Approved 2002 Twomile Creek UMATILLA 0 to 3.6 Sedimentation TMDL Approved 2002 Umatilla River UMATILLA 82 to 88.1 Sedimentation Year Around TMDL 2002 Umatilla River UMATILLA 0 to 32.1 Turbidity Spring/Summer TMDL Approved • 2002 Umatilla River UMATILLA 54.2 td 56 Sedimentation Year Around TMDL Approved 2002 West Birch Creek UMATILLA • 0 to 19.7 Sedimentation TMDL Approved 2002 Beaver Creek UPPER GRANDE RONDE 0 to 13.5 Sedimentation TMDL Approved 2002 Chicken Creek UPPER GRANDE RONDE 0 to 2.4 Sedimentation TMDL Approved 2002 Clear Creek UPPER GRANDE RONDE 0 to 7.2 Sedimentation TMDL Approved 2002 Dark Canyon UPPER GRANDE RONDE 0 to 9.6 Sedimentation TMDL Approved 2002 Fly Creek UPPER GRANDE RONDE 0 to 13.3 Sedimentation TMDL Approved 2002 .Jordan Creek UPPER GRANDE RONDE 0 to 8 Sedimentation TMDL Approved 2002 i Limber Jim Creek UPPER GRANDE RONDE 0 to 5 ' Sedimentation .TNIDL Approved 2002 4 Little Catherine Creek UPPER GRANDE RONDE 0 to 8.6 Sedimentation TMDL Approved 2002 Little Fly Creek UPPER GRANDE RONDE 0 to 7.2 Sedimentation TMDL Approved 2002 Lookingglass Creek UPPER GRANDE RONDE 0 to 11.1 Sedimentation TMDL Approved 2002 Lookout Creek UPPER GRANDE RONDE 0 to 6 Sedimentation TMDL Approved 2002 McCoy Creek UPPER GRANDE RONDE 0 to 18.3 Sedimentation TMDL Approved 2002 McIntyre Creek UPPER GRANDE RONDE 0 to 7.3 Sedimentation TMDL Approved 2002 Meadow Creek UPPER GRANDE RONDE 0 to 23.5 Sedimentation TMDL Approved 2002 Mottet Creek UPPER GRANDE RONDE ,0 to 10.3 Sedimentation TNIDL Approved 2002 North Fork Catherine Creek UPPER GRANDE RONDE 0 to 2.8 Sedimentation TMDL Approved 2002 Shee ` Creek � Sediiiiientatioa ,. . TMDL _Approved .. : =2002 P '' ` UP1'ER'GRANDE RONDE •' 0 to 5'1 " A Sheep " •Creek" !•... UPPER GRANDE,RONDE 0 1; to:10 8 . _ e ?• tSeditnentattion ^ ., f' ...i TMDL ?AppruVed.,. .`;2002: South Fork Catherine Creek UPPER GRANDE RONDE 5.2 to 8.3 Sedimentation TMDL Approved 2002 Clover Creek UPPER KLAMATH 0 to 8.4 Sedimentation 303(d) List 1998 Spencer Creek UPPER KLAMATH 0 to 18.9 Sedimentation 303(d) List 1998 Unnamed Waterbody UPPER KLAMATH - 0 to 4.3 ,Sedimentation 303(d) List 1998 Deer Creek UPPER ROGUE 0 to 3.2 Sedimentation ' 303(d) List 1998 Lake Creek UPPER ROGUE 0 to 7.8 Sedimentation 303(d) List 1998 Little Butte Creek UPPER ROGUE 0 to 16.7 Sedimentation 303(d) List 1998 Lost Creek UPPER ROGUE 0 to 8.4 Sedimentation 303(d) List 1998 Soda Creek UPPER ROGUE 0 to 5.6 Sedimentation 303(d) List 1998 . South Fork Little Butte Creek UPPER ROGUE 0 to 16.4 ,Sedimentation 303(d) List 1998 Fern Ridge Reservoir/Long Tom R. UPPER WILLAMETTE 24.2 to 31.8 Turbidity 303(d) List 1998 Bear Creek WALLOWA 0 to 7.5 Sedimentation 303(d) List 1998 Hurricane Creek 'WALLOWA 0 to 7.6 Sedimentation 303(d) List 1998 Lostine River WALLOWA 0 to 9 Sedimentation 303(d) List 1998 Minam River WALLOWA 0 to 10.2 Sedimentation 303(d) List 1998 Prairie Creek WALLOWA 0 to 12.5 Sedimentation 303(d) List 1993 Wallowa River : WALLOWA 0 to 50 Sedimentation 303(d) List 1998 ( ".:::;'East Beaver Creek WILSON - TRASK - NESTUCCA 0 to 10.7 Sedimentation TMDL Approved 2002 • INestucca River WILSON- TRASK- NESTUCCA 2 8.9 to 53.8 Sedimentation TMDL Approved 2002 TriMet Washington County Commuter Rail EPSC Plan July 6, 2006 APPENDIX D Grading Drainage and Erosion Control Plans from 95% Design Set/Stormwater Management Plan Prepared by URS • • • A • '8 • C • D • E • F • 0 • H / 1 I I 1 j C D CONSTRUON UNITS �I 1 `R , 1 1 611 , _ • 'A': 3 +90 23 [ • , `\ 1 w _ MOM 3 D D• u• 0 30' fio' ": PROTECT WITH opoT CL so / I I mo ; L .� �.� t_ • _ RIPRAP PER ENGINEER �:•: - �_T'" 0 o ® ®���_ SCALE: 1' - 30' IE - 115.0 % - � - - -- CL ' A•: 3 +52.12, - '1'2 :0 : L . ' i I.. CURB Cur 3. • / \ e SEDIMENT TRAP ' 1 ' - f ,. / . ' � i RDA . 147-5- \ 6 • \ , E T01LS: SEE 1 : ]'a 66.7 IB. S' 1 ; C30571 I OIL Sp ATFR� G PLATE TYPE Cl 'A' + ■ •• � w _ 1 RIM = SEPARATOR �.- - k� I- \ ;. - ) IE OUT (S) - 145.8 / 5 O 148.10 g ) ' • IE OUT (N) - 145.5 / 1 5+00 1 - .11 6. H , ]+00 _ 1 �{ )� �H/ DI PIP 10-IN A \�/ • L� 1 � . �- ,, • 1 HP108.60 -y e- 4 . H• / p \- _ - /__ � /`�__ /__ _ C1 • • 03 11 „1------- `J , I CL V. 6 +59.83. 11.6 L i �� �� • RIM - 147.50 � ' _J• O CONSTRUCTION UNITS, . r IE IN (E) - 1{6.0 \ Y .. �8 • �'\ IE OUT ((N):..'146.D___ _. ' - i , 146:98 81 \� 1• ,`\ FUTU DEVELOPMENT \ • • \ t `` '! I ' ' 0. 'B':1 54-92_,_____.4.7 0' 1 ' 1 ` I I T RIM 1 .l 146.28 `; ' a CATCH :BASIL 1 • ' - 150.00 • 9 - \ ( \ } 145.62 + 146. \ 1 IE (W) .. '47.5 p 9 a 145:74140• O.:S I 8•146.78 \ l \ tl 1 \ 0 ,-- • 4,144_- i ) . ,,,:: Si , ,./. I \ • - A IV s, ID a. El \ \ O CIVIL KEY NOTES . REFERENCE DETAIL(S) -. -� 0 i • I \ ? MJOS - I '�' • 7- 145.63 I \\ 1 1 CONSTRUCT SILT FENCE 6 /CT 2 CONSTRUCT GRAVEL ENTRANCE I/5DC30903 8W145.68 1 w'0 s �' 1, 71 I 4 I [ 145.11 \ i � '�i ' eve 60 \ � - i:.�� a 14581 -_ -�\ -- t ' - iY� - - - .i - 11552 .._. -- -I- - i `I? ... 3i _. ... CIVIL CONSTRUCTION NOTES - -- I/5, - , -- -- - - - A ALL CURB ELEVATIONS AT FLOWt1NE AND FACE OF CURB : --- ' / 145 47 o > ` �{' ------ NN TO E ` Iz 0 TC�TOP OF CURB, BW =BACK OF WALK RIM - 116.00 RIM - 145.34 CATCH BASIN CA IE IN (N) - 140.5 IE OUT (5) .. 141.0 RIM 150.29 RII IE EXIST (EAW) - 138.32 IF IN (6) ■ ta1.0 IE IF FX,ST (51'- 13• R6 1 MI I 9/ %04 C) TRH- COUNTY METROPOLITAN .TRANSPORTATION DISTRICT OF OREGON WASHINGTON COUNTY COMMUTER RAIL 6 t 48 8 8/404 k oa CAPITAL PROJECTS TRACK/SYSTEMS/STATION CMGC D 33 - WILSONVILLE STATION AND PARK X RIDE 3566 - 61F - �� T R I I MET FACILITIES DIVISION 710 LI NO GRADING, DRAINAGE AND EROSION CONTROL �y _ - 1 �� �T� PORIIAND. OR10011 ILON STREET 97232 ne urnv `g art m a..sas InN. .r .wro.m I nrt M.NC 1' -70 33C30.532 17 RH03D2l1BW Is ,n.. • • • A 8 8 • C • 0 • E • F • G • N - STANDARD , ' ( ",' - -- -. -•Rw _. ' ,. �.»� _•,'....• v- rlw A- -a a-fix'` --_ , „, L. � -- - - -- -.Z-11.7!::: - - t -�� ...�vs SA C .` - J • 1 i - ---i„ UuITS 0 1 ;! i; � . .- :_.� -r . ..............- _..__,__' . CL A': 15+85 99.6' (t .__._....._- ':I I ' / . PROPERTT'CORNER ", PROPERTY BOUNDARY: / ARTICULATING CSNUTE MAT I I / i- WO SWA • 4•• awry 1 • \ -E _ ' "_' ,' _- - - ` • = r CURB CUT 1 1 / cu RB -GUT - - �1I - - -le �e�. :' _ 1 i 1 f1 I I f 'r - - _ I! ' � - 1- - -- -E la 1 It 5 IB a a s il Atti•t2s I , C30S 2 ♦ �I �rtttn• _ _ _ I ? _ t 2{ i I N I 1 1 y . 'Y I \ / ! 69 70 71 72 77 78 81 82 83 84 ,B9 90 93 94 95 • • ; 102 1 A i �' 1 • . ...Ay I \ S � �� Q ) i /( )/ CI Q s I IC r I I \ JO ` _ 1 -' 4 73 0 79 88 87 86 85 ' 92 91: 100 99 98 97 108 I Si 1 ' I • ' • = JO OYU , `` .._. 1 03 05 ■ • A 10 5B 173 s4 • ■ •AT 70+ 58 177 107 toff IIS>< ' I 1 ; 1 1 't. 7 7 7 -- T ....: • : 4 4 y \ tt i6. ''{ ' CL 46. 54' 10 • ' 3 \ i I \ lam* t I I L A: XX' R -' 1 I a AREA .• 0.7 t; C 150.71 1 I I I i TC15 ' 1 I .1 sr 'OJAU SW .... RR11.1 . 50:71 _ RIO .150 I ' , i53.: "•`•n ' / • W- LEYEL.... I A : 15+86.5 .321.3' ,R . • IE OIJ W) . 148.71 16 W I (W) . 148 �'*` � I :161 S 0 t\ - / S PREADER/DISP E8 510N WA AU SWA CUR CUT / / • IS - , / 18646865 OPPON 111 It I1J 11 143 1 145 146 f 175 6 1p-<,,L/1718E 3 - ...... IE 115. ._ / 54.. 1 ... / fie fi7 131 I }2 t64 .5 196 •1 5 / . 1y45 ■■■� A /0 C \ ZII�65 _'1„_ )I 1 gFl:l 154 1y 2 16 65171 7 919 9 "" _ ' 1 - / /125 1 140 41i 157 I t 917 2 1 3 9 66 8 0 . , ZB .;,0- _ it I I 1 67 1 24 1 13515fi 1 9172 � 67 B• g 154.:• • : j 1 yy-- 61 23 36 155 1 I 171 6 2• • p L55 4. • i i / , 60 / 1' 139 \� ue a \(�I �: To x69'B 187 , , 20 1 Jz ��\,N s .: I E / " / CONSTRUC11ON " 21 121 120 119 \, 15! 1 152 151 8• 18518 3 13 •.BO S 5. UR S R AND DELINEATION WEIUND s0 -FT L'NIi$ 13.9 N h i 5. . ...._ 4 5 saoz / J / N Pi" , " ' / h % ' (, 272 273 N � 56 :! ' r‘' ' J - o + i 270 27 1 11 136 • / > \EciaiTicml___I -- i CURB CUT 4J f I 5 M '156. .1 3 /� ..: .. / 147.x5. 206 207 20 209 222, 2 3 420 231 . 2 245 245 25 254 255256_,269 ii i nl, Rt 56.x• 1 ED ' / ACIFl C WETLAND r I 27 219 280 36 n� ' I'' '157 • .. . . 1 157 • • / / iJ 212 21 - _� I II� - 1 210 225 224 236 235 Z }{ 233 248 224r, 261 259 258 257 257 276 27 � 11 3 I % 't r y ..I I �`•I / /. ' .- I 214 215 ` 12 16 217 226 462 9 2 250 \ 26 262 263 264 / 49 ) 1 I 157. • 1 it \ \\ - / / , _ � CL A 17 +4903 19.13. L -'.6 .. 1 I� ,- Q ` . - X 1 � ' ' I � I `` I ( \ �� \ / f / � RI ARAIN EA O tB /5 221 22 119 218 ' 29 228 711 243 24 241 252 , 131 68 267 266 265/ I I I 1 , I IF • / - GNL C:t g11RUG ➢DN NOTES J . .;.. _.. E 1N (E) ■ 146,5 • \ .. .. u...... - (!Y 283,5'B3 2B � 1 1 I s �� II IhJN ' • ° � `� I6 - 6l' (5) • 1465 • I - CL • A • 10 5 9 173.54' L � A CUR: - NATIONS AT FL011�INE.'AND FACE OF CURB IE OUT (N) • 146 5 - - y i AR 'S N 4 • N FL W ISE NOTED . >� • .... .s- -, 150. • TE: :AIIEA DRAINS TYPE II , / ��� 'E: SHALLOW .!SHALL ONFORN TO CITY OF • . / 288 \, = , l E OUT W ■ 1483 JS t I TYPE - � f1E POETIC WORKS STANDARDS ...... `' • ._ - 88 91 3011 305 3 319 \ 336 T (.37 4B 1 t .8 389 I / I (;1 1 i • I u'. 4 i 2: • 290 2 316 317 318 31 ] {e ]5 0 S I ull1 •��i�'2L t - , •6 B7 82306315 7J 203J , ®- 783!7 I \ ®_ } s2 ]7- 7 =, I �l t ,,I [[�� // 2 [, ,��.3 1• o I 3 �_[•��STRUCTION SHALL 1•NFORLI ' TO VALS NNLLE PUBLIC WORKS 0 •"♦- 17 937: 07 330 EI,l�{ ( + [ \j • ]] " 'j \ � I ]21 34• � � 36 , ' ; '�� ' 1 7 .- ; - 5 � I 1 \- (( \ }53J }71 Ip I `■ • _ _ _ I. .'297_29fi5 2827 326321 325 J24 } fp' J6 }59"658757 3356(37 I I 1� . 2, \ A •ARDS I �I II �It<Ti. TRAPS.2'X2'X4 UPGRADIENT o 3 JI l 310 3 3 {t e t I \ OF ALL CURB CUTS _ T 0 29`2 2 tl / / 3 0 3 I.t2f. 3 '7 .C. y2 F \ © SURTA OF CURB, BW BACK 3F 35 N C•EA • . AIN - c' . • A�'�8 +90.40 y I T'S- I."� • 57 , • \ 0 SURFACE ELEVATIONS • 33630535 . _. CL 18 90.06 1919' L 1 ' ! S7 _ - ...... R / ..... ._ IN 48.17 1, CL �' A�1 1 S7 I i i \. • lIn 'CIVIL KEY VPDTES R RENCE DETAIL(S) 1.1.,____:..„„: I J •5 • E 16 (E) • 146.7 0 RIO . t it 2``• I I IS6 ' . -- _ . t !1 `•!•! J ■ • r 6 CC118.303 3 418 C � IE WT (W) 148 .64 I ISE CONSTRUCT SILT FEN. 136 : f ' ` E OUT (N . 1467 I ' PERF PIPE IN BALLAST m • g / == L � = -_ �� + p 379 80 JB 387 ' u 380 391 392 93 94 99 400 10]'40 405 40a Ct1761.41 I ' `` I / I / _ - -- + / C C) r n ` 4 ♦ • 30• 384 383 390 3691' 5 r� :402 '410® } • 08 07 /" x I 415 414 - ' 1 II L : - ]98397 3 J9 401 IW / I SEE ADDITIONAL $} \ / i DRAINAGE NOTES: / CURB a F/1 1; N .. • - � b:3, t• -1.� 31 TGtS }. 0 I ' i � 52 6 c ; � _ , i 5 . 1 III /_� / t^ J SHEETS 33C30532 k - 4 �� St ■tll p I L . }3c3os73 • ., = �� f 1s7 111 !11: :11 5 ' .■. . ■r . ■. '21F 7 i I 4 s III k • \ '1 I c l • (('' �:` _ O ❑ .tlj • E O ❑ I� • f�`y i : i I' i6 30' 3' 0 7o fo /r . �'• / 1 ) p I I I A 11 I IV 1 SCALE: r Jo' rot 1 : 1 : 1 WN 9/,8,41.4 I ® TRI- COUNTY METROPOUTAN TRANSPORTATION DISTRICT OF OREGON WASHINGTON COUNTY COMMUTER RAIL 1 8 `" 17,26: 'MACK/SYSTEMS /STATION CMGC [ _ 866 9 / a 6 of CAPITAL PROJECTS 3a ANO 33 - YALSONVILLE STATION AND PARK & RIDE S CAS 8jI, 6 �E � T R I ®ME FACILITIES DMSION GRADING, DRAINAGE, AND EROSION CONTROL 0 3L� i.[ 6 It 710 N.E. HOl1ADAY STREET E 1.3 609 nod 01ED IG coNsT9U6603 F98 6/30406 P0611AN0. ORE038 67232 I e, p . 4•9 ua o uum• K °m ((215 12/.11/94 910m" Io..` 06 -30-06 .ar�n I ua 08-30-08 l -20 I 3303/3531 I 8803024300 I arch i6 A • B • C • D • E • 0 • G • H '4': 14 +33.44' 39.45' R 8 _ ' PERF PIPE IN BALLAST a_11 7Q 74' 6.74' R -- - - -- - - -- - - — - ' - -- - - — - - — _ _ _ _ WAN! _ •••• LDCAIE P011 ENGINEER CATCH BASIN 'A': 11+09.54' 35.42' R V../ IE IN (N) .. 119.00' 619 125.00' it A` iF 20' 10' 0' 20' 40' _,__. IE IN (SE) - 121.3' RIM - 123.00' . .` 10 OUT (NW) - 121.2' IE - 121 5' CONSTRUCTION - }; �:� ^ ^._ -^ i_ - ALE • I- ; e —a— __. __ __...._ _ 4_: _o= a_a._ a — ^_a = n om. ._. — .___.__ OMITS • - � I1! 10 TOC - — .a_ = a_,n - _n --• • \� Y.,� _«-- i um 10' P a... 12 46 Tom; 4 }_ S _ JO-00M 50 A' - �'�- .._1.5n: 17 _.. __ . _ .� ■ - L_.L.= b-SA Sr .10-44M W t r- 124.Sa Na • .... _ V \ I n.wv CO 70�•,. w 1 m P! 144 4 • I] +0o 124.]9 � ` - 1 a a- ..14.22 to 1, �n n n - �.{� 1 - I ry 3 65 T� y ; cr-2; 1 r .18 2 8 ^ . , J ' ` '� • 1 a.30 4T• `5 - }.es ry � � ':/ �; 12 ',/ - rr w. r I «._ . -. l J :aj . 124.r r ` `? 124.3 12 4.05 .__ � � — I 4.49 J _ + }� �. 1 2.66 ' 2 }.99 .� �ti • • �~ 15 � ' ry .-- 4 i " gym ,T, 12L. 1.R r �6 - + 00 123.20 �.1] .Z.? 9 ' / . _.. - - .. 85 ' , J - n • MI .. •. Qom ,.._ 12] _ • �� .r pCtDV - -_ I Ir( ` Y(AIER QIIAI ITT SWAIF G0�' "'- -- 0. - �_._., b £ - MINIMUM CENTERLINE; s e' rO 15. 7 .., , kq A LENGTH -, 110 LF I 1J ',7 'A': I7 +Il.]6', 4.22' R y > * I ) 'A': 14 +69.01', 5.95' R CLEANOUT CATCH e RIM - 123.00' �+ 3 RIM - IE IN ($E) - 121.00' IE IN (5E) - 120.50' IE OUT (9) - 121.00' \ \ • 1 IE O (N) - 120.50' `` UT . i i 'A 14+60 57' 7 37' R \� \ \\ / I OUIFALL IE OUT (9) - 120.50' \� , • • • \� CIVIL CONSTRUCTION NOTES _- __ -- -- E5 ARE 10 DUCTILE IRON CONSTRUCTION OMITS 4 _. _. A UNLESS OTHERMASE NOTED • " -- B AU. CURB ELEVATIONS AT BOWLINE AND FACE OF CURB UNLESS — _._ - -- ____„7 `7 e . ; .......f._ OTHERWISE NOTES (LOCATED AT PC POINTS AS SHOWN ON _.__......._ . ......_.___._. ..... �-, —` '- DRAYANG 20030522) C ALL CLEANOUT(TIPE: STANDARD), CATCH BASINS (TYPE: CG-1), 1, ` 2 1 `.` CONFORM D O WATER CLEAN WATER SERVICES DESIGN 57ANOARDS, D --------- CONFORM TO N WATER - .. "7.77' . ..--7=7 _ — _ _ _ _ _� D ALL PIPE CONSTRUCTION SHALL - _- — "_'- - _ 20 ^ - CULVERT UNDER TWO a . I . � , 0 - -1 MP 2: q O SERVICES DDESIGN STANDARDS O�l A V CHANNEL SPILLWAY. • • END OPEN CHANNEL \ 1NTH 0007 CLASS 50 RIP RAP OPE CHANNFI w • 0091107 RIP RAP BANK 5 ■ 118,00' SEE TYPICAL RAIL SECTION (REFERENCE CLEAN WATER 5 - 118.50' 1 \ SERVICES) PER ENGINEER SEE TYPICAL R AIL SECTION .e hf --.5. 'A': 14+ 7' 22 7.27' R 54 F9 ER 5 CR( \ DRIVEWAYS (NOT SHOWN) ` IE 1 : 1 1 . 1 1 ( 1 4 ) - 119.00' . 1 I 110 8/19.04 © TRI- COUNTY METROPOLITAN TRANSPORTATION DISTRICT OF OREGON WASHINGTON COUNTY COMMUTER RAIL �� MT 8/1/04 .. . CAPITAL PROJECTS TRACK/SYSTEMS/STATION CMGC 3 1[ MO 20 - IUALAl1N STATION P - sari — tor-- S 3 '• ::;, T R 1 �' M E T FACILITIES DMSION GRADING, DRAINAGE AND EROSION CONTROL PLAN _ 7I0 9.r. XolfAna SIRE NOR 1H E • ' � .tr - PORRNIO. 060008 97220 g a .•C d:3 >.rz r M.O. ' uMSNra n•4nm: 1 wrz w.•wm. 1 w+r. - 1 -20 1 20030572 1 co+nr.n RMO702{1BW I +>e w_ 7 • • A • B • C • D • E • F • 0 • • H `i 1 I. I , .'W .- .. i I 5' I • 20' 10' 0' 20' 40' •ma 11wa JO-A.a= IN STALL CULVER STA: 1 +: ,M1 ,I' STA: 20 +2 .90' 1 .I: ' � — _. / LEANWT STORM WATER 10" HOPE PIPE 11.+•a 5 I i stn 166 WTFALL TO EXISTING NC VEGETAGED [HAMS- " . R IM .162.00' 11-1.1 — / :64- -_ .. 1 : I ' R - OUT SE ` a - 158.62' IE .. 158.50' ............... ..7..n c9 .. I IE_DU.I._(SF) 156.85 _. -- _ _ _..__ _ — �]B6:6B =.._ �—_ ___ STAY ...24.1• `-_.___ _.___— =81uNN Y%ISTIq(G'STM SL { � W3 N) i5d90 _ _ _ .. -----.,,--,r." _ _c \ CATCH BASIN . 1 � ` , - TE' 9T'(E) 157W ' � i1 __ l l :11 595 .. '" "- RIM .161 87 I I D - IE OUT (W) .. 1 J ! /7 1j O. ✓ ` --- ` _ ~ \CATCH BASIN 101 \ � IE OUT -(E) 160 20— .t r _A. % Y CA 2 < ftfl.e? . __ . _ . p e l a' . a , =:? h . _ .— ; _- — A __ 3 W e �°T.,_. _, 00 C-�___ '1t* 7+ ... 16+-0� _ _ _ 79100. ..; __ _ 1 1 9p _ • ----- _ (n i S ^, . �w ... 1, .:.L`yn _ 62A5 0 _ _ _ _ - . •0 • _ _ -s- . —._._. ._.�� z —.— .�.. e ..—.. .�� ma y._ 161.44-_ • a � � t - -. - — r .e. T. _ .;..v -. � '"�'. 4 M - i �� �. _ .� - 161.2! I 1 `CONSTRUCTION 0MI75 I I I • I I I II I 1 1 , i 1 1 I I 1 • I 1 ! I ' 4 GRADING AND DRAINAGE NOTES ' A ALL CURB ELEVATIONS AT FLOWLINE AND FACE OF CURB UNLESS • - • OTHERWISE NOTED (LOCATED AT PC POINTS AS SHOWN ON DRAWING 13C30522) • 6 ALL CLEANOUT(TYPE: STANDARD). CATCH BASINS (TYPE. CC -1), MANHOLES (TYPE: STANDARD). SHALL CONFORM TO CLEAN WATER SERVICES DESIGN STANDARDS C ALL PIPES 10" HOPE ASTM 03034. UNLESS SPECIFIED. CONSTRUCTION • SHALL CONFORM TO CLEAN WATER SERVICES DESIGN STANDARDS EROSION CONTROL NOTES . A REFER TO DETAIL SHEET CT11302 FOR EROSION CONTROL NOTES B CONTRACTOR TO PROVIDE AND MAINTAIN GRAVEL CONSTRUCTION ENTRANCES 61 ALL POINTS OF ACCESS PER NOTES ON SHEET CITA302 5 . O EROSION CONTROL KEY NOTES REFERENCE DETAIL(S) 11 INSTALL SILT FENCE ON DOWNHILL 510E OF PROJECT WORK AREA 6/CT11303 12 INSTALL SEDIMENT BARRIER AT PIPE DUTFALL 1/0154303 _ 13 INSTALL INLET PROTECTION ON PROPOSED INLET 2/011.1303 1 • ! _ - 13/1 • & TRI—COUNTY METROPOLITAN TRANSPORTATION DISTRICT OF OREGON WASHINGTON COUNTY COU OUTER RAIL Lt INN 6/1 ,9404 CAPITAL PROJECTS TRACK /SYSTEMS /STATION CIACC 3 . 1 - AND IS - TIGARD STATION A - ate — — T R I M E T FACILITIES DIVISION GRADING. DRAINAGE AND EROSION CONTROL PLAN w , _ _ _. 710 ME HOLIADAY STREET ORIIAND, OREGON 97232 3 E ( �RSS. - -- 6:R — {{ n urt n rro• I one I o.1c P ICYL 1 ".20' I 1]0]0531 I I RH030241BW I a'''' ''' • • • • • • • A • 8 • C • D • E • F • 0 • H I _. ' — _ 1 j I CL'B'' 18+12.29'..0. R . I _ -- . _ -.._._ _ - —�'—�_ . -�.. _ - - I_ CAT :A _ _ _ _ _ _ I y / _ _ _ _ � RIM • 2].10' s _ 0 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _I _ _ �_ _ _ _ __ _I— _ _ _ _ 41111, � CL • B • : 18 +65.82' 87.24' 9 IE OUTI(W) - 122.0' 9 17+ te . ._......___._..._._ - i• :. .�3 23.42' R ._. -_.._ .. 1 1 CLEANOUT _� - -- a -- . --- - 4 - 123.10' CL - E": 10 +52.65' 64.. — _ Rlu .1 23.5' - - _ - - 20' 40' ' IE OUT 722.00` - • AN • T - COOT 1 ( ZOO — � — _ _ — _ _ —._ -... -- / � 2 �10� ! RIM • 123.5' .._ — .... ..._..__ ._..__�. —. / '. .��r IE OUT .121.90' CATCH BASIN g ?. I ' (N CL • B • : I7 +49.91', 20.08' R - p • \ C . . �.._ _ _�- �,— ,.� ..,..'._- .- ...... -..� ,�., - SCA I C 1 '13 +55 78' 67.09' L wa• : 1 ,.., ti CCLL TCH INLET----________,... RIM .127.10' _ ___ _..._.. _ __ - `•y'y __ ` 'y rs' : QI -._. - - IE - OUT M . 122.00' 4/ P .- �"p? Ao-sAus •'f ... ,. _ - J -_ RA °123:00' .. ....�Y._�.r __ — _,„_...._.4, s -w-i iS .. _.j .. - _ _ - _ 1: ? _ . ). _ • • _ t 2 —o o—.•f . e o— o_ - e_,— — —c am a we —o' —e_o_ — o— a— o R . — ^r \.- _ - _ _ 0 0 A1- =T 11226.--.7 _ffi_I - -4::---.TI LAMS D DRAINAGE �. 111111111111111111.1111 1 !�, WA___ x 8 Y Ym—iE. 9 �.n o 5 K 8 am'._' - .'.7f o 8 � ., Ar-r.. a �� - _ _ L h. �.--. a .�... —,�.�. e— — a— o— o —o —a —a —e —a — a_.. —a— a —• —e— —o— ` Na - - - - - - .. " '(.1 t -,. 0� I ��1r I � P �� s +p 0 � _ 17+00 g ^ �n 1s +o. f ` ?�.. � .., �,, 15 +00 -}I a 1• p i3 / 12 3139 t 5 1 ,--;-1- � j '9'(, I i ,,„, : + 1J 3 . . _ _ _ / ' , _ _ _ _ _ _ _ _ h_ _ _ /+ s T I 1 @L i .I 0 f 124. i II Y i Q i 1 , (: 1 0 +QO -(- 1, � I + _ / : 12 +00 1 3;00 I ,,.g74+J 1 : l i 0 125.65 — _.__ __ _ — - - -- _ - ^ a. , ,J an' T N;`."�.- y,v∎" -"' -" Arm_ 7. - : �ae,�.�.. - se...... --.�. 1 ,l N . Eta N __, --�_. ' _ ,,, `.,r. ._ �._ .. __ — •— . 3 1 y ' \ -.4 i�l`k - `�. _ _, — 1 9 r � \ - .PCB __ } I ` I L t I -- - �' - = A y �_ ------ ----- - - - -- --- --- --- ----- -- -- -- -- A LL i� I . I ` / \ �. ' 1 ' . / Ii 1 . ` � �4 II I . CO NST RUCTION UNITS 1 v I I ` r ' t! iii I , 4 0 EROSION CONTROL KEY NOTES REFERENCE DETAIL(S) 11 INSTALL SILT FENCE ON DOWNHILL 510E OF PROJECT WORK AREA 6/CT4303 12 INSTALL SEDIMENT BARRIER AT PIPE OUIFALL 1 /CT11303 13 _ INSTALL INLET PROTECTION ON PROPOSED INLET 2 /CTM303 14 INSTALL INLET PROTECTION ON EXISTING INLET UNTIL REMOVED 2/CT4303 • CIVIL CONSTRUCTION NOTES A ALL NEW STORMWATER PIPES ARE 10 DUCTILE IRON UNLESS OTHERWISE NOTED B ALL CURB ELEVATIONS AT FLOWUNE AND FACE OF CURB UNLESS OTHERWISE NOTED (LOCATED AT PC POINTS AS 9101414 ON DRAWING 20C30521) 5 C ALL CLE 10UT(TYPE: STANDARD), CATCH BASINS (TYPE: CC -1). B AND DITCH INLET (REF. 250), SHALL CONFORM TO CLEAN WATER SERVICES DESIGN STANDARDS D All PIPE CONSTRUCTION SHALL CONFORM TO CLEAN WATER /a SERVICES OE510N STANDARDS 4 1 7/29404 6b TRI- COUNTY METROPOLITAN TRANSPORTATION DISTRICT OF OREGON WASHINGTON COUNTY COMMUTER RAIL IL i 13 7/229/04 - - CAPITAL PROJECTS TRACK /SYSTEMS /STATION CMGC rt i • ` MET o 20 - TU140 EROSION STATION FACILITIES DIV GRADING. DRAINAGE AND EROSION CONTROL PLAN T 2' , 4 TRI 7 10 N HOLIADAY STREET SOUTH E PORTLAND. OREGON 07232 TiES� gh .o. art n�+vo. •nsso•s art - su..m[P. Irn. •r- xa.[n. lurt 1 I 20C30531 I�,� 090302418W I an w.. A • B • C • D • E • F • G • H / J ...LLLllllll , / \/ \.. y A / J o �s p & TO' 10' 0' TO' b' s• .. SCALE: 1' TO' / 199 -T ST 120 +1'. s Q67.. �® Gs� m \ 200.161 a — O as as as as a: A S • TV ''-A . ` . • 00.16 I « « « • « i v / ` wsOO _ us • ■ s , 4 . - 100. , 6r._ __.� / • 1 o , °_ 199.57 e.-- _ '� !„ 1 (: 198.6 `� �, _ -_ ____ - _ _ _ —_. —_ _ `\ - -'-_"` O - - .- j 0 2 r i I '1 200.19 - 0 , 1. — 0 m u _ �— _-_— _ m 194 f ly --. . m J J1 � 065- TO6.J6 ..___ .te -- 9 Ni _ ! r , _J l l I � / , 0 N n 1.5 K f -'" r7 7 5x 205.14 _ _ t �. ..� — , _ 5 0 — — _ • ' _..........• -- - — ' _.. �f�S,99- O9 r —i o _.. ... _. . _.. _...._ — _.._ N ig� / J� ___ 11 ` _ /' /, . _._......... _ .... 7 . _ _. • _ �.�__ _ _-�� � - - —_ — - . . _ " . 4 , AIk I /ML � 7"i / r' '� - ._ . ,ff _.p _. — tea - __�_ - _ ._ .... .... ___ _ — s 2..17 so - _ __ fO I so . —__ 7 ; � _ 1 0 -IN D F . ENO U DDBREIRAITS'�`,:L c6 '... c w " _ mss _ — " r ' _ _ a _ _ _ °" — _ i " kL C.11°"4" . —' — — — _ —'‘‘-----`',.T.,,,,.. _ - _K= Ta i SHi .` CONNE T"'f0 AiCEA 6RAIFI {' , `` - >J °cam \ � 1' / Sr _ � CONNECT TO DITCH „ _s, / 1 - GRADING NOTES O ALL ELEVATIONS AT FINISHED SURFACE B SIDEWALKS, RAMPS, AND PLATFORMS SNALL HAVE A MAXIMUM CROSS -SLOPE OF 1.59 EROSION CONTROL NOTES A REFER TO DETAIL SHEET.C111302 FOR EROSION CONTROL NOTES B CONTRACTOR TO PRONOE AND MAINTAIN GRAVEL CONSTRUCTION ENTRANCES AT ALL POINTS OF ACCESS PER NOTES ON SHEET - CT.1302 , 0 EROSION CONTROL KEY NOTES REFERENCE DETAIL(S) 1 INSTALL 20' -12 UP CULVERT 2 INSTALL SILT FENCE ' 6 /CTM303 3 NSTALL SEDIMENT BARRIER 1/C114303 4 INSTALL B' PERFORATED PVC UNOERDRAIN 5 INSTALL INLET PROTECTION Z /CF1.1303 El/W4 ® TRI— COUNTY METROPOLITAN TRANSPORTATION DISTRICT OF OREGON WASHINGTON COUNTY COMMUTER RAIL BKH 6/19/04 CAPITAL PROJECTS TRACK/SYSTEMS /STATION CMGC AN 07 WASHINGTON SQUARE STATION -� DATE 1 '` T R 1 ® M E T - FACILITIES DIVISION . GRADING, DRAINAGE AND EROSION CONTROL 710 9.0. HOLLAOA1 STREET PORRANO. OREGON 97232 A 11 • B • C• D • E • F • c • H • 1 j L , I �' II' I • i �` t 766.62 —� _._ ■ -� • 20' 20' 40' 1.p../ - - ' � I I6a.77 166.67 i 169.12 166.59 ,iA - SCALE 1 - 20' . i 1 i `� I. _ $',�'� - _- Tes'IY��'rrs' -_._� • �j la •m 1. • 0017 I) I / 0 61.78 r� t l • 7..-C Oa �n � ti :-.-7 ..,� . ' } i 163.35 Ai I 1fiJ _.. EXISTING RR __ -._. ( II� E TRACK Y i I � .� X-1 x x x x� : I Z li i J/ x _ A� 167.31 .. -. J •/ . I.�w _ -r � 16 . ' S -- - Ie s� A i 7 ' .q5� -' --, - -. -.. 4 .20 _- _ . ...... �/i� i 19E_O T_IE).:- 15Q21Y- ._.- R�RACK -- K.. ,,, �^ M o � I � � 1 6 1 6J.28' 'I6SJ 16S'29 ., .: • __ w.1ig [ l Sw - /162 '' 121111161. 167.21 R 160.66 _ _ ± n - �,{� t ®S __ x x x 63 • x x _ s��7t x R „ - - -8 x — . - _ ( -1c l ei *C y � BTU+ � = — .��OZ.— - — 1 T ; t _ ,-.}'Y R. 16151__ ' l it = -_2_-_-_•.7"-"'-- S f (n � irfC r • 3 � t - -I '''''':"711 �y .... "•' _ _- - DpHRESK = Tc ,r �� U W - I I _ .fw _ 0- 1 118- 4__ —. R 16031 1- vl _ 5 Q <lnafi 64' >s x � -x. ti 1 61 a2. — �1 � �/ 1 �� w.zc ii i r-' ' `��IPOOG� -te . _ . o . r � 9 ,. 161 I.O. • -- . I 1...71 � - TC 162. J6' CONSTRUCTION OMITS i _.- III — 3 _ _ —__ —__ STA 26 +17.17 I.: ' R • ANOU( _ ; J 6 0 I • RIM ■ 18].00 IE IN (W 159.00 1 • IE OUT (E). 159.00 { I \j I LL ; � —� I I GRADING AND DRAINAGE NOTES I\ .: / I ND A LAMING AREAS NOT TO EXCEED 1.50% W ANY DIRECTION j, / B A CURB ELEVATIONS AT ROWUNE AND FACE OF CURB UNLESS OTHERWISE NOTED (LOCATED AT PC POINTS AS SHOWN ON SHEET \, I 13C30521) Sy ) • C ALL CLEANOUT(TYPE: STANDARD), CATCH BASINS (TYPE: CG -T), 1111W' ' r F; _ � _ SHALL CONFORM TO CLEAN WATER SERVICES DESIGN STANDARDS I - - - - — - - _ -_I _ - - - - - I 0 ALL PIPES 10' HOPE ASTU 03071, UNLESS SPECIFIED. CONSTRUCTION SHALL CONFORM TO CLEAN WATER SERVICES DESIGN STANDARDS I , - -- I ; � EROSION CONTROL NOTES • • . A REFER TO DETAIL SHEET C151302 FOR EROSION CONTROL NOTES . 0 CONTRACTOR TO PROVIDE AND MAINTAIN GRAVEL CONSTRUCTION - ENTRANCES AT ALL POINTS OF ACCESS PER NOTES ON SHEET CTM302 5 6 . 0 EROSION CONTROL KEY NOTES REFERENCE DETAIL(S) C OI 11 INSTALL SILT FENCE ON DOWNHILL 510E OF PROJECT 11064 AREA 6/070303 1 §I 12 INSTALL SEDIMENT BARRIER AT PIPE OUTFALL 1/610303 . 13 INSTALL INLET PROTECTION ON PROPOSED INLET 2/CTIA303 6/19404 : TRI— COUNTY METROPOLITAN TRANSPORTATION DISTRICT OF OREGON WASHINGTON COUNTY COMMUTER RAIL 2f __ _m_i IOWA CAPITAL PROJECTS" • TRACK /SYSTEMS /STAT1ON CMGC 1 Z. '�e D 13 - 71GARD STATION • - A2 - our 7' ' _ T R I M E T FACILRIES .E DA r HOU. DIVISION GRADING, DRAINAGE AND EROSION CONTROL PLAN 7lD N STREET r d . . eve . 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'P Vi ,`-r.� 1* ort �)6 EB 1 7568 � r/ 175.49' - — '—. / t `` MAT G( EXISIBIC MATCH NC // / k' :. ` . f` � f� 7.- PLA /: l / ® \ F t' 1805 7 S \1 78'/1 Gl ' -- ' ! ��.\ 4 A8 TORO t TRACK `ELE�d�ION ATO 4 ABOVE T+9 Y O U " 176AS�: / A `�/ , ? ., ^ ,� 1 750 ' 17866' TINO2 i " ` / `ti - �. . . k - - ( TOP P TFp3N Of R1L) 0 ?i -}, 3 • p O -s 2 CZ OC. 0 i ~ A CC �' * C / • . /// u I i � k x — X�'� \,- EROSION CONTROL NOTES �9 ` ; U, • �'X 1 •�,t j A REFER TO DETAIL SHEET 0111302 FOR EROSION CONTROL NOTES VT,, <-` � '''1 !✓ ; j; GRADING NOTES � :` � 8 CONTRACTOR TO PROVIDE AND MAINTAIN GRAVEL CONSTRUCTION +.� +, .: r\ ' I I / A LANDING AREAS NOT TO EXCEED I.SOS IN ANY DIRECTION ENTRANCES AT ALL POINTS OF ACCESS.PEA NOTES ON SHEET 1. \ � I .i ,: 01/4302 \ 1 \ " i - : B ALL CURB ELEVATIONS AT FLOWLJNE AND FACE OF CURB UNLESS \\ 1 W � ' - T y OTHERWISE NOTED GRADING KEY NOTES REFERENCE DETAIL(S) 0 EROSION CONTROL KEY NOTES REFERENCE DETAIL(S) • , '' �� j 11 INSTALL SILT FENCE DOWNHILL OF 6 /CTM303 \ , .'�, I f� PLATFORM EARTHWORK MATCH UNE +� ; ly.`j,i I }, ¢ /' -• 12 INSTALL SILT FENCE DOWNHILL OF 6 /CT11303 '"'.\ 1 I CIT.: LANDING AREA LANDSCAPE CONSTRUCITON . '1/4..._-....5 "�. ■ I I P.N./ 2 INSTALL SEDIMENT CONTROL INLET BEAVERTON STD. 145 DISTURBANCE - � I 1 3 CONNECT TO EXIST. STORM DRAIN 13 INSTALL INLET SEDIMENT BARRIER ON 3 /CD/303 i s1 i 4 PLUG AND ABANDON EXISTING EXISTING INLET UNTIL INLET 15 \' I o STORM DRAIN REMOVED. 5 INSTALL B' 5 ' ' 1 I NSTAL PVC STORM DRAIN 14 INSTALL INLET SEDIMENT BARRIER 3/011.4303 \ I : GRADING TAG LEGEND 6 40 HDPE PERFORATED PIPE A/01030551 & 8/01C-10551 ON PROPOSED INLET i'. CE CURB EXPOSURE SUBORAIN 15 CONTRACTOR TO PROPOSE EROSION I I (r.,, PLAT TOP OF PLATFORM CONTROL PUN 806 IN- 51REAM I I i 7 OUTLET SUBORAIN TO HALL CREEK 6 TOR TOP OF RAIL ` THROUGH BRIDGE WINGWALL WORK NECESSARY FOR BRIDGE 9 TW TOP OF WALL CONSTRUCTION 0/17404 0 TRI— COUNTY METROPOLITAN TRANSPORTATION DISTRICT OF OREGON WASHINGTON COUNTY COMMUTER RAIL 2f — 9 /104 CAPITAL PROJECTS TRACK /SYSTEMS /STATION MCC TRI 04)M ET ,NO 01- . BEAVERTON DRAINAGE AND EROSION CONTROL PLAN TRANSIT CENTER STATION �� _ FACIUTEII 710 N N S D 05(004 V SION GRADING5 1 • ja ss•s s@ RORTIANO. OREGON 9717 04,4 51 in uo. ov[ X614 � —� s I yno 1 1' 20' 01C30531 6503024185 I`"" TriMet Washington County Commuter Rail EPSC Plan July 6, 2006 APPENDIX E BMP Installation Details Prepared by URS 7 OF MINIMUM SEAMS. 12" OVERLAP / _r „ ITsT� .. , . , , '.'"•`•'.',W.`••••• °�� 4 :3 '' � . +,' • •• • • • • • • • •\- - 51 . 1..., • -?_iTi -III -I + ++ + t . • y , •A• • .` +` • • • • • • •• . ++. +, ` + II I • = r Er= 117 -71 tT ,- r • • • � -'T = r' i 1 i -1 - 11 • BARRIER REQUIRED TOE OF SLOPE. PLASTIC • SHEETING NOTES: 1. MINIMUM '12” OVERLAP OF ALL SEAMS REQUIRED. 2. BARRIER REQUIRED Q TOE OF STOCK PILE. 3. COVERING MAINTAINED TIGHTLY . IN PLACE BY USING .SANDBAGS OR TIRES ON ROPES WITH A MAXIMUM 10' GRID SPACING IN ALL DIRECTIONS. PLASTIC SHEETING Detail Drawing 4 -4 • Page 4 -36 • • • • P • c,\4\ F.N' ASS So 4,„,• .••••. • ,G ,,,_ P D. P P o o. o. • D o . a• • / D /. // / o D o 0 a . 4. • a a • / 4 o RADIUS = 25' MIN- vQ : o > • CLEAN PIT RUN OR 2" —MINUS GRAVEL Pp �\� O ( <5" S SUBGRADE REINFORCEMENT �N p • �P GEOTEXTILE, AS REQUIRED • P�- 8' MIN. DEPTH '20' MIN. FOR SINGLE FAMILY AND DUPLEX RESIDENTIAL ' l / GRAVEL CONSTRUCTION ENTRANCE • r CURB RAMP yy f ° 7 / PAVEMENT • a a a a D NOTES: DIMENSIONS SINGLE FAMILY 20' LONG BY 20' WIDE 8" DEEP OF 3 / 4 " MINUS CLEAN ROCK. COMMERCIAL 50' LONG BY 20' WIDE 3 -6" CLEAN ROCK, GOVERNING AUTHORITY MAY REQUIRE GEOTEXTILE FABRIC TO PREVENT SUB —SOIL PUMPING. • l CO\STRJCTIO\ = NTRA\C Detail Drawing 4 -5 Page 4 -42 • • FILTER FABRIC MATERIAL • 36" WIDE ROLLS • USE STITCHED LOOPS /n 3 OVER 2 "x 2" POSTS ' minimum V l I i e�ei i i�ieieiei e Oiei e t . :* :: : : : : : : :: +: i % %i%i! % %i!i :.:.: ■►_._ �-7� from toe slope. • „ail • I 1 ieie i � ei`eie ii eie eie ieieieie eeei ._ ► i..i OeeeOeeieee00 a 1 oi:j '' N ` 0 -. . e e � e � ei�.�e� e4 e i � i %i0 ! i i ! i. : ii ! �� . : *: $ 6:., ,, ►pe eeee •e 0 ieeeeeeeeeeeeeeee e eee e eeeee e eee� ►e ►O�i ee e e e J. e e e e0 e e 0ee .. e00ee0e e00eeeeee 4 0 e O e e� e�Oi �e�e �e�e�e�e e i e y�0 i �e�e�e�e�e�e �e�ee � e J e d n aDi . ; e a � ` � i �, � ` `e f e�e, .1/J. � z � � 6'MAXIMUM SPACING • U L i 7' FRONT VIEW PROFILE z NTS NTS ` ri 1 0 un (D I R ANGLE FILTER FABRIC FENCE TO ASSURE SOIL IS TRAPPED • 0 a • N OTES: • • 0 1. BURY BOTTOM OF FILTER FABRIC 6” . C VERTICALLY BELOW FINISHED GRADE. �� �� .■ • 2. 2 "x 2" FIR, PINE OR STEEL FENCE POSTS. INTERLOCKED 3. POSTS TO BE INSTALLED ON UPHILL SIDE OF SLOPE. O1 2 "x 2" POSTS AND ATTACH PLAN \ / 4. COMPACT BOTH SIDES OF FILTER FABRIC LAN �/IEW 5. TRENCH. • PANELS MUST BE PLACED NTS ACCORDING TO SPACING •TABLE 4 -7. • • MAY BE USED SHORT TERM W/ UTILITY WORK AND W/ PHASING OF DEVELOPMENT iii -- / Pf I .n X1.1 I, ; FLOW _ . nluUpiulii " 1uT' m �. - IIIIII� llllllp�llljl , 1 "i'• It ai:: IW nlu Pl teliWll 11 -- -'� ' illlllllllim , ' li t lli , Sn/ II 111 /11111'll llll�ill /11111 =11 JIIIIIIII�llll, ulllllll�lUl , uN atinivoli 4 ru nuti at; n nusiulp l l i11111111pll IIII 1101111/1111111111 il Itilo malut IIIIIIIIIIIIIUlIII _ - ___ „IIIIIA $B%7i1Ig11 NI; • 41111 f 11111 VIII n - 111111INI : •it_ —_ __ 1 111111911 I ,„ mll I Illllfllllllla s : ° - -_ : � ; ur ;w ' a, llllllllll a n.minm IIII ff = _- R R: 4 : 01u1111111111111IIIIl is =°1 � IPA IIIIIIIIIWIIII a:: -. 11114111111111111 � unZ iul ..= w I!11111111IIIIIIIId ' ?" I a ' ..� = = - - '' h u. uuii - . � 0= ?= �.v i1 + ? ' 'i jl' =r inu _ �9i. . • � -st a .5:1. ;' _. ..� ...� NN CATCH BASIN AREA DRAIN 6 1111111111141 4' Illliris auui1A1111i'lll. IIIIII111111IIPII' Ih Illpuounu - :r . : --r i ;I......., 1111111111111111 —,I i, ":ip:i; Il.. IIIIIIII l "Ina li �l i1 s r i llllllllsll g • ( —�" ii iiiiilllli7ii FLOW liiim�i�rl I MIII II fllllh L________L____ q u 11u1u u num IrgallewY r . overlap of bogs. 111113111111111 1i i f • PLAN VIEW �1 11111Q1y111/UI 1;, a /llul i • LOW • • E \ nl11.-1� 1 _ 11u a111.■ i F a= _ i— r3-- • DITCH BOTTOM e. p 11111 Q DITCH INLET NOTES: 1. ADDITIONAL MEASURES MUST BE CONSIDERED DEPENDING ON - SOIL TYPES. 2. BIOFILTER BAGS SHOULD BE STAKED WOODEN APPLICABLE ORUAPP EQUAL PE R ER BAG. INLET PROTECTION TYPE 4 Detail Drawing 4 -24 Page 4 -111 I - S 1Tao07 - 6 00 / I cgoo -Tb 2 Foundation Engineering, Inc. I -_ Professional- Geotechnical Services y p ,. ,..--- o c_, - $ ‘ 1 r., Rick Nannenga, P.E., P.L.S. December 9, 2004 URS Corporation kAR 1 5 2007 111 SW Columbia, Suite 1500 `Y. iL y A. 'iac Portland, Oregon 97201 Beaverton to Wilsonville Commuter Rail Project 2042026 Foundation Report Transit Centers • Washington and Clackamas Counties, Oregon Dear Mr. Nannenga: We have completed the requested . geotechnical investigation and foundation design for the proposed transit centers in Washington and Clackamas Counties, Oregon. Additional structures and features are addressed in separate reports. Our report includes a description of our work, a discussion of the site conditions, a summary of laboratory testing, boring logs and a discussion of engineering analyses. Recommendations are included for site preparation and foundation design. INTRODUCTION Tri -Met plans to construct a commuter rail connecting Wilsonville to Beaverton. The proposed commuter rail will utilize existing track for most of the alignment. The proposed project will include rehabilitation of some of the existing track and reconstruction of several existing railroad bridges. This report includes the proposed Beaverton, Washington Square, Tigard, Tualatin, and Wilsonville Transit Centers in Washington and Clackamas Counties, Oregon. Additional reports will cover the remaining structures on this project. The transit center locations are shown on the location map in Figure 1. Tri -Met is the project owner and URS Corporation (URS) is the prime designer. HDR . Engineering (HDR) is providing heavy rail engineering. Foundation Engineering, Inc. (FEI) was retained by URS to perform the geotechnical investigation and foundation design. Purpose and Scope The purpose of the investigation was to develop recommendations for the design and construction of the transit centers.: The scope of the geotechnical work included exploratory drilling; engineering analysis, laboratory testing, and preparation of this report. Foundation Engineering will provide the boring logs in CAD format for inclusion in the plans developed by URS: Portland • Corvallis 7420 SW Hunziker Street, Suite A • Portland; Oregon 97223 -8252 • Bus. (503) 684 -9514 • Fax (503) 598 -9343 LOCAL GEOLOGY Geology We reviewed existing geologic literature prior to our subsurface investigation. The available geologic mapping shows the transit center areas are mantled by fine - grained Willamette Silt (Qff). Our exploration encountered surficial alluvial silt and silty clay underlain at some locations by granular deposits consistent with the geologic mapping. Willamette Silt (Pleistocene) includes fine- grained facies of the catastrophic flood deposits consisting of low to medium plasticity silt and fine sand. The thickness of unit Qff is typically ±30 to 60 feet, with a maximum thickness of ±180 feet. Soil development commonly introduces significant clay into the upper ±6 to 15 feet of the deposits. These sediments are locally thick in the lower areas and extend upslope to a maximum of ±EI. 300 to 400 feet. Interfingered with the Willamette Silt are coarse - grained flood deposits (Qfc) consisting of sand, sand and gravel, silty gravel and silty sand. The Qfc unit was deposited by one or more phases of catastrophic glacial outburst floods from late Pleistocene Lake Missoula. Coarse - grained sediments are typically concentrated along channels where floodwater velocities were high, such as localized areas near Wilsonville and Tualatin. FIELD EXPLORATION Five exploratory borings (BH -1, 9, 11, 16, and 23) were drilled at the proposed transit centers from July 19 to August 12, 2004. The borings were advanced with a Pioneer trailer- mounted drill rig using solid stem auger drilling techniques. Disturbed samples were obtained in conjunction with Standard Penetration Tests (SPT) at ±2.5 -foot intervals to a depth of ±15 feet and at ±5 -foot intervals thereafter. The SPT, which is run when the split -spoon is driven, provides an indication of the relative stiffness or density of the foundation soils. Relatively undisturbed Shelby tube samples were obtained at select intervals. The drilling . started at elevations ranging from ±EI. 123 to 191 feet and extended . to depths ranging from ±7.5 feet to 26.5 feet (±EI. 164.5 to 96.5 feet). These ground surface elevations were in the field from the rail plans and are approximate. The boring locations are shown in Figures 2 to 6: The borings were continually logged by a geotechnical engineer from our office. The final logs (Appendix A) were prepared based on a review of the field logs, an examination of the soil samples in our laboratory, and the results of laboratory testing. DISCUSSION OF SITE CONDITIONS Beaverton Transit Center The subsurface profile at the Beaverton Transit Center was investigated with boring BH -1 The site is underlain by fill consisting of stiff, low plasticity silt extending to a depth of ±4.0 feet. An SPT value of 13 blows per foot (bpf) of penetration was measured in the fill. The f is underlain by alluvium (Qff) consisting of medium stiff to Transit Centers December 9, 2004 Foundation Report Proiect 2042026 Washington and Clackamas Counties, Oregon 2. URS Corporation hard, low plasticity to nonplastic silt. The alluvium extended to the termination depth of the boring ( ±26.5 feet). SPT values in the alluvium ranged from 5 to 60 bpf. Ground water was encountered during drilling at a depth of ±13 feet. The ground water level is expected to closely follow the elevation of Beaverton Creek. Washington Square Transit Center The subsurface profile at the Washington Square Transit Center was investigated with boring BH -9. The site is underlain by fill consisting of gravel railroad ballast to a depth of ±2.5 feet. The fill is underlain by alluvium (Qff) consisting of layers of stiff to hard, low plasticity to nonplastic silt. The alluvium extended to the termination depth of the boring ( ±26.5 feet). SPT values in the alluvium ranged from 13 to 63 bpf. Ground water was encountered during drilling at a depth of ±7.5 feet. The ground water level is expected to rise to near the surface during the wet winter months. Tigard Transit Center The subsurface profile at the Tigard Transit Center was investigated with boring BH -11. The site is underlain by fill consisting of gravel railroad ballast to a depth of ±2.5 feet. The fill is underlain by alluvium (Qff) consisting of layers of stiff to very stiff, medium plasticity silty clay, stiff low plasticity silt, and very stiff, medium plasticity clayey silt. The alluvium extended to the termination depth of the boring ( ±26.5 feet). SPT values in the alluvial unit ranged from 11 to 41 bpf. Ground water was encountered during drilling at a depth of _ ±7.5 feet. The ground water level is expected to rise to near the surface during the wet winter months. Tualatin Transit Center The subsurface profile at the Tualatin Transit Center was investigated with boring BH -16. The site is underlain by fill consisting of gravel railroad ballast to a depth of ±2.5 feet. The fill is underlain by alluvium (Qff) consisting of layers of soft, low plasticity silt to a depth of ±4.5 feet and stiff silty clay to a depth of ±8 feet. SPT values of 4 and 9 bpf were `. measured in the silt and silty clay, respectively. The Qff unit is underlain by alluvial gravel (Qfc) consisting of dense to very dense gravel extending to a depth of ±24 feet. SPT values in the gravel ranged from 38 to 51 bpf. The gravel is underlain by medium stiff, low to medium plasticity clayey silt extending to the termination depth of the boring ( ±26.5 feet). An SPT value of 7 bpf was measured in the clayey silt: Ground water was encountered during drilling at a depth of ±7.5 feet. The ground water level is expected to rise to near the surface during the wet winter months. Wilsonville Transit Center The subsurface profile at the Wilsonville Transit Center was investigated with boring BH -23. The site is underlain by alluvium (Qff) consisting of very stiff silt to a depth of Transit Centers December 9, 2004 Foundation Report Proiect 2042026 Washington and Clackamas Counties, Oregon 3. URS Corporation ±5.5 feet. An SPT value of 26 bpf was measured in the alluvium. The silt is underlain ' by alluvial gravel (Qfc) consisting of very dense silty gravel that extended to the termination depth of the boring ( ±7.5 feet). SPT values of 50 blows per 5 inches were measured in the gravel. Ground water was not encountered in the boring. Localized areas of perched ground water may rise to near the surface during the wet winter months. LABORATORY TESTING The laboratory testing consisted of natural water contents, Atterberg limits tests, and grain size analyses. Atterberg limits testing performed on fine - grained alluvial soil samples showed liquid limits between 36 and 45 and plasticity indices between 12 and 22, indicating the material classification varies narrowly from CL to CL -ML. The results of grain size analyses on a sample of alluvial silt indicated 83 percent finer than the No. 200 sieve, suggesting that the material is a silt with some sand. The results of the moisture content testing are presented on the boring logs. The laboratory test results are presented in Table 1 (attached). LIQUEFACTION ASSESSMENT Liquefiable soils typically consist of loose, fine sands and nonplastic silt below the ground water table. Soils encountered at this site are relatively stiff silts and clays and relatively dense granular soils. Therefore, we believe the risk of liquefaction caused by energy released during a design seismic event during periods of high water level (i.e., saturated conditions) is low. FOUNDATION ANALYSIS AND DESIGN RECOMMENDATIONS We understand that the transit centers include ±3 -foot high, raised loading platforms with open, steel canopy waiting area structures. We anticipate that the proposed platform walls will be supported on continuous shallow footings. We understand that the canopy structures will be founded on shallow slab -type footings tied into the wall footings. 'Bearing Capacity We estimated the bearing capacity of the continuous wall footings and structural . slab -type footings for the raised platform. We assumed that the footings would be placed at least 2 feet below existing grade. We calculated an allowable bearing pressure of 3,000 psf for the footings assuming a factor of safety of 3. This nominal bearing pressure may be used for foundation design at all transit centers. Settlement All of the transit center sites appear to be underlain by stiff fill and relatively stiff alluvium. The transit center structure loads are not expected to exceed the soil preconsolidation pressure. Therefore, settlement of the platforms and structures is expected to be Tess than 1 inch, most of which is expected to occur during construction. Transit Centers December 9, 2004 Foundation Report Proiect 2042026 Washington and Clackamas Counties, Oregon 4. URS Corporation Lateral Pressures on Walls Earth pressure Toads for the platform walls were estimated based on at -rest pressures for restrained walls. A friction angle of 34 degrees and a unit weight of 125 pcf were assumed for the design condition. We assume that crushed rock (as defined in this report) will be used in the zone behind the wall. Drained conditions were also assumed. An at -rest earth pressure coefficient K =0.44 was ca lculated for restrained walls. The lateral earth pressure on the walls may be estimated using an equivalent fluid density of 55 pcf. Sliding Resistance For resistance to sliding, we used a passive earth pressure coefficient, K of 4.5 using an assumed friction angle of 32 for the .stiff, native silt or silty clay or granular backfill. We calculated a resulting equivalent fluid density of 260 pcf for the earth pressure assuming that the ground water may rise to the surface. We estimated the sliding resistance of the footings placed at least 2 feet below the ground surface. A friction angle of 22 was assumed between the footing and the native silty clay. These calculations result in a friction coefficient of 0.4. Seismic Design We understand that the acceleration spectrum for the structures will be based on procedures outlined in the 2003 International Building Codes (IBC). IBC (2003) gives maximum considered earthquake spectral response at short periods (Ss) of 1.05 g with 5% damping. The spectral response for a 1- second period (S1) is given as 0.35 g with 5% damping. We recommend using a Site Class D to reflect a stiff soil profile at each of these sites. The corresponding design spectral response acceleration parameters (SDS and SD -1) are SDS =0.75 (short period) and SD-1=0.4 (1- second period). DESIGN AND CONSTRUCTION RECOMMENDATIONS We have assumed that the foundations will be constructed during the dry season. W e should be notified if wet- season construction is planned so we can supply wet - weather recommendations. Site Preparation 1. Restrict earthwork to the dry summer months (approximately June through October). This will reduce dewatering needs and improve material placement and compaction. 2. Strip the existing ground ±6 inches, or as required to remove all organic matter. Dispose of all strippings outside of construction areas. 3. Do not compact the subgrade. Minimize disturbance of the subgrade during excavation. Remove soft or unsuitable foundation material and replace with crushed rock as described below and compact to at least 95% relative compaction (using maximum dry density of ASTM D698 as the standard). Transit Centers December 9, 2004 Foundation Report Proiect 2042026 Washington and Clackamas Counties, Oregon 5. URS Corporation Foundation Design 4. Design continuous footings using an allowable bearing pressure of 3,000 psf. The minimum footing depth and width should be at least .2 feet. 5. Assume that the total settlement of the platforms and structures will be limited to less than 1 inch. 6. Design the platform walls using an equivalent fluid density of 55 pcf. 7. For passive resistance to sliding, use an equivalent fluid density of 260 pcf and a friction coefficient on the bottom of the footings of 0.4. Foundation Construction 8. A construction monitoring program is • recommended to confirm that all installation criteria presented herein are followed. FEI is available to provide construction -phase observation and /or consulting services. Material and Compaction Requirements 9. Fill beneath the platform surface with crushed rock consisting of 1 or 3 /4 -inch minus, clean, well - graded, angular, crushed gravel or rock. We should be provided a sample of the intended fill for approval prior to delivery to the site. Compact all crushed rock in loose lifts not exceeding 6 inches. The fill should be compacted to 95% relative compaction (using ASTM D698 as the standard) using light or hand - operated equipment adjacent to the wall. Crushed rock will compact most efficiently with vibratory equipment. Field density tests should be run frequently to confirm adequate compaction. LIMITATIONS Construction Observation/Testing We recommend that a member of the consultant team be present during construction. Any geotechnical engineering judgment in the field should be provided by a representative of the consultant team. Frequent,field density tests should be run on all compacted fills, subgrade, base rock and asphalt pavement. Variation of Subsurface Conditions, Use of Report and Warranty The analysis, conclusions, and recommendations contained herein are based on the assumption that the subsurface profiles encountered in the borings are representative of overall site conditions. The above recommendations assume that we will have the opportunity to review final drawings and be present during construction to confirm assumed foundation conditions. No changes in the enclosed recommendations should be made without our approval. We will assume no responsibility or liability for any engineering judgment, inspection, or testing performed by others. Transit Centers December 9, 2004 Foundation Report Project 2042026 Washington and Clackamas Counties, Oregon 6. URS Corporation This report was prepared for the exclusive use of the URS Corporation and design consultants for the Beaverton to Wilsonville Commuter Rail project in Washington and Clackamas Counties, Oregon. Information contained herein should not be used for other sites or for unanticipated construction without our written consent. This report is intended for planning and design purposes. Contractors using this information to estimate construction quantities or costs do so at their own risk. Our services do not include any survey or assessment of potential surface contamination or contamination of the soil or ground water by hazardous or toxic materials. We assume that those services, if needed, have been completed by others. Our work was done in accordance with generally accepted soil and foundation engineering practices. No other warranty, expressed or implied, is made. The site is underlain by alluvial soils consisting of silt and silty clay. It has been a pleasure assisting you with this phase of your project. Please do not hesitate to contact us if you have any questions or require further assistance. Sincerely, FOUNDATION ENGINEERING, INC. k 341 -61-1 coy/frP" Ronald L. Czajkowski, P.E. ly . eiffer, P.E. Project Engineer Senior Engineer RLC/TJP /plt a1/49 PRoien Enclosure .0 G 16,066 " EGON %021 °� € ( ( 8 YJ. 4F /2 - 3 / - o Transit Centers December 9, 2004 Foundation Report Project 2042026 Washington and Clackamas Counties, Oregon 7. URS Corporation Beaverton — Wilsonville Commuter Rail Transit Centers Washington and Clackamas Counties, Oregon TABLE 1: LABORATORY TEST SUMMARY Moisture Dry Boring Sample Depth (ft) Content Density LL PL PI %Fines ( %) (pcf) BH -1 SS -1 -1 2.5 26 SS -1 -3 7.5 30 36 24 12 SS -1 -6 14.5 36 83 SS -1 -8 25 32 BH -9 SS -9 -1 2.5 — -- 29 — - -- - - - - -- ------- - - - - -- SS-9-2 5 27 SS -9 -4 9.5 32 SS -9 -6 15 30 SS -9 -7 20 33 BH-11 SS -11 -1 2.5 29 45 23 22 SS -11 -3 7.5 53 SS -11 -4 9.5 29 SS -11 -7 20 30 BH-16 SS -16 -1 2.5 26 SS -16 -2 5 30 39 21 18 SS -16 -8 25 58 BH -23 SS -23 -1 2.5 - - - - 25 — - - -- - -- - - - -- SS-23-2 5 27 , f i ,zI - r l" tJ, Beave ( �� , , �s as f '- 4,:::,i,-.5 ' • t ..I_ n l _ . a ` 1 7 �., ((flip.- ii 4 / ` f . lteli'l + r mI o� i - - -• - it- r{ ;; i ' 1 : _ a% � � r / c . 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APPR. 0 1 2 4 Miles REV�s PROJECT NO. 204 -2 -026 ' I ' II ill ,,, FOUNDATION ENGINEERING INC. Location Map FIGURE NO. jLLu ILA PROFESSIONAL GEOTECFINICAL SERVICES Transit Centers _ 7420 SW NUNZfflER ROAD, SUITS A em PORTLAND. OR 9-8252 Beaverton — Wilsonville Commuter Rail �• (am) 684 -9514 PAX (508) 698 -9943 Washington County, Oregon FILE NAME: TRNA— Location .. ... -. _ .. a0 BYO ® - __ _tom ®® ® ®00��0 ®100 � . � I 2 CJ i I Z o z1- W N 0 a �• i 7- • o i j � a <� a N i i. Q r . r r t 1 I ; 3�f ! % n S ^` -:V4 • 'f4+s a " y ��. q n T,`,1' a ( r ,+ 9 a: 4' ''' • ( u , \ + E d � tltl � j ;,. 1 1 s, > ti } f " , i .', S `' � +Iftr d �. � + \ +; 1 a 5 , r J` ? r l >, t,: r,r'f T s ._ 7r .J .''S Yr -t( ; ,. { - k �k . � i fs -•t -1 ,9 4, �4 . 'o- r :, ,t r .''`• . 1 ' r P . t o Nr , : t t d 'j ! - r { j 1 , v ` r Ly' a \ L 2 rfi'. " J C i,, d r 6. ' h . r ° T 4, 7 I > °F C - r `4v. 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E 4 a . :',M - i 6 M . b" � � yy w w. 5 �a 6` i fs �" (( T . '" $n 'A ` n, � O rT { t 4g ♦t{ r{ f" 14.,1 • ' - ''�, +r "7:1 '„'ice �1 14 -r ' f t . ,44 z f>�rr a' i ,4 6 . !> u_ W ��. ` R , t' ' r r i 4. G,M t •ra,: 4 , g 3 .. "t , y Ly {3 , W 'f ! f ` r 1 2 g . `i $ :v? i 7, � 1 , 0.y• 'k[r ! x •t: fr f S k Q � , ' *• � tr t� hazr Y 'a-d- �'"° +� , #`� d`'"i1 �r �itf>8 t ea.. �L S ' � . 4 � r � = x , c. . ne .. t r f"5 , - . 1 r- ,, r∎ , t 1, ,. `i! � . •f , • a;Et' E + L7 r• 1 s a 3. F t r 3 P .' f,;s T'7 • ,.. ,f ... ,f . ; `' piiii s . 1' ii1. - ' • • A' , -° 4K4 r a�Rt . : 2t-4 , lx a,` 4(, ,i: . I I . Z . • • VIII Illh� _ • Appendix A . . „ ,. . . •...• .. .. • .., ..........•. . . . . . , .• ... • Boring L o . S .. • .... . . . . • • ,. •••-:. :•• •,,,.. . • . . „ : ... " . .. .. • .. .. . . . . . . . . .. . . .. . • • . . ,.. •. . . . .. . . . . .. . .. . •. . . . .. . , . , . . . . . ... .. . •.. ...,.. .._ ...... , • . . • • . . . ...... .. .. • . . . ., • „. , . . . . . . . . . . ... ... .. . . • • . . . .. . , .. • •. .. .. .. . • . • ... . . . • .. .. • .. , , . . . . .. ... . . . . , . • . . ,. , . .. . . „ . r .. • • • • • Professional � .. ' Geotechni F oun dat ion Engineering inc. . Servi DISTINCTION BETWEEN FIELD LOGS AND FINAL LOGS A field log is prepared for each boring or test pit by our field representative. The log contains information concerning sampling depths and the presence of various materials such as gravel, cobbles, and fill, and observations of ground water. It also contains our interpretation of the soil conditions between samples. The final logs presented in this report represent our interpretation of the contents of the field logs and the results of the laboratory examinations and tests. Our recommendations are based on the contents of the final Togs and the information contained therein and not on the field logs. VARIATION IN SOILS BETWEEN TEST PITS AND BORINGS The final log and related information depict subsurface conditions only at the specific location and on the date indicated. Those using the information contained herein should be aware that soil conditions at other locations or on other dates may differ. Actual foundation or subgrade conditions should be confirmed by us during construction. TRANSITION BETWEEN SOIL OR ROCK TYPES The lines designating the interface between soil, fill or rock on the final logs and on subsurface profiles presented in the report are determined by interpolation and are therefore approximate. The transition between the materials may be abrupt or gradual. Only at boring or test pit locations should profiles be considered as reasonably accurate and then only to the degree implied by the notes thereon. SAMPLE OR TEST SYMBOLS SHF3 -4 1 T t---Sample Number S — Grab Samples Boring or Test Pit Number SS — Standard Penetration Test Sample (split— spoon) Sample Type SH — Thin— walled Shelby Tube Sample C — Core Sample Top of Sample Attempt CS — Continuous Sample Recovered Portion 'I ♦ Standard Penetration Test Resistance equals the number Unrecovered Portion (large of blows a 140 Ib. weight falling 30 in. is required to drive circle indicates no recovery) a standard split —spoon sampler 1 ft. Practical refusal is Bottom of Sample Attempt equal to 50 or more blows per 6 in. of sampler penetration. 0 Water Content (7). UNIFIED SOIL CLASSIFICATION SYMBOLS FIELD SHEAR STRENGTH TEST G — Gravel W — Well Graded Shear strength measurements on test pit side S — Sand P — Poorly Graded walls, blocks of soil or Shelby tube samples M — Silt L — Low Plasticity are typically made with Torvane or pocket C — Clay H — High Plasticity penetrometer devices. Pt — Peat 0 — Organic TYPICAL SOIL /ROCK SYMBOLS WATER TABLE E Sand ® Silt , Water Table Location ® Clay 1 Gravel (1/31/00) Date of Measurement Basalt Siltstone {1 Piezometer Tip Location (if used) L ilk PRO IIO I2 N G rT MIN N G INC. SYMBOL KEY 7420 sw l T Ba . -8 ` ORING AND TEST PIT LOGS Portland, OR 97223-8262 BUS. (609) 684 -9514 FAX (609) 698 -9949 I • Explanation of Common Terms Used in Soil Descriptions / Field Identification Cohesive Soils Granular Soils SPT S (tsf) Term SPT Term Easily penetrated several inches 0 — 1 < 0.125 Very Soft 0 — 4 Very Loose by fist. Easily penetrated several inches 2 — 4 0.125 -0.25 Soft 5 — 10 Loose by thumb. Can be penetrated several inches 5 — 8 0.25 — 0.50 Medium Stiff 11 — 30 Medium by thumb with moderate effort. (Firm) Dense Readily indented by thumb but 9 — 15 0.50 — 1.0 Stiff 31 — 50 Dense penetrated only with great effort. Readily indented by thumbnail. 16 30 1.0 — 2.0 Very Stiff > 50 Very Dense Indented with difficulty by thumbnail. 31 — 60 > 2.0 Hard J + Undrained shear strength Term Soil Moisture Field Description Dry Absence of moisture. Dusty. Dry to the touch. Damp Soil has moisture. Cohesive soils are below plastic limit and usually moldable. Moist Grains appear darkened, but no visible water. Silt /clay will clump. Sand will bulk. Soils are often at or near plastic limit. Wet Visible water on larger grain surfaces. Sand and cohesionless silt exhibit dilatancy. Cohesive silt /clay can be readily remolded. Soil leaves wetness on the hand when squeezed. "Wet" indicates that the soil is wetter than the optimum moisture content and above the plastic limit. / Term PI Plasticity Field Test \ Nonplastic 0 — 3 Cannot be rolled into a thread. Low Plasticity 3 — 15 Can be rolled into a thread with some difficulty. Medium Plasticity 15 — 30 Easily rolled into thread. High Plasticity > 30 Easily rolled and rerolled into thread. J Term Soil . Structure Criteria Term Soil Cementation Criteria Stratified Alternating layers at least 1 inch Weak Breaks under light finger thick — describe variation. pressure. Laminated Alternating layers at Tess than Moderate Breaks under hard finger 1 inch thick — describe variation. pressure. Fissured Contains shears and partings Strong Will not break with finger along planes of weakness. pressure. Slickensides Partings appear glossy or striated. Blocky Breaks into lumps — crumbly. Lensed Contains pockets of different soils — describe variation. l ■ I _ PROFESSIONAL G ENGINEERING S COMMON TERMS 7420 SY B' Rd_. Suite SOIL DESCRIPTIONS Portland. OR 97229 -8252 BUS. (503) 884 -9514 TAX (503) 598 -9949 Nal Soil and Rock Description • SPT, • Moisture, Depth p Elev. Installations/ and Log Samples N -Value Feet Comments Depth fl Recovery 2 RQD., % Water Table 175 0 50 100 Stiff SILT; trace wood chips, grey and brown, damp, 0.0 1 low plasticity, (fill). 2 3 SS -1 -1 413 • 4 171.0_ Medium stiff to stiff SILT; dark brown mottled orange 4.0 5 brown and grey, moist, low plasticity, blocky, (Off). SS -1 -2 6 6 7 8 SS-1 -3 5 • 9 10— SS-14 I 7 11 12 Becomes brown, some fine sand, nonplastic to low plasticity. SH-1 -5 13 Ground 14 water table at 13 feet SS • • during 15 - 15. drilling. 16 17 18 Becomes very stiff, grey, moist, low plasticity, blocky. 19 20— SS -1 -7 25 21 22 23 24 25 • ;.. . SS-1-8 I 60 26 Becomes hard. 148.5_ Bottom of boring at 26.5 feet. 26 Project No.: 2042026 Boring Log: BH- 1 Surface Elevation: 175.0 feet (Approx.) Beaverton - Wilsonville Commuter Rail Date of Boring: August 9, 2004 Washington County, Oregon Aill -' Foundation Engineering, Inc. Page 1 of 1 Depth 1 Soil and Rock Description Elev. • SPT, • Moisture, % Installations/ and Log Samples N -Value Feet Comments Depth Q Recovery g RQD., % Water Table 191 0 50 100 GRAVEL; coarse gravel, angular, (railroad ballast ° 0.0 rock). 0 1 0 2 ° 188.5_ • • 3 Stiff to very stiff SILT; brown mottled light brown, 2.5 SS -9 -1 23 damp, low plasticity, blocky, (Off). 4 5 Becomes brown, nonplastic. SS -9 -2 13 • 6 7 8 SH-9 -3 I Ground water table 9 at 7.5 feet during • drilling. 10 — — _ 181.0_ Very stiff to hard SILT; grey, moist, low plasticity to 10.0 SS-9 -4 25 nonplastic, blocky, (Off). 11 12 Becomes hard. • 13 SS -9 -5 39 14 15- SS -9-6 "35 . 16 17 18 • 19 20 _ Becomes interbedded with lenses of fine grey sand. SS - 9 - 7. 18 21 22 23 24 25 Sand lenses absent. SS -9-8 6 3 26 164.5 Bottom of boring at 26.5 feet. 26.5 Project No.: 2042026 Boring Log: BH- 9 Surface Elevation: 191.0 feet (Approx.) Beaverton - Wilsonville Commuter Rail Date of Boring: August 12, 2004 Washington County, Oregon Al 111 Foundation Engineering, Inc. Page 1 of 1 Depth. Soil and Rock Description Elev. • SPT, • Moisture, % Installations/ and Log Samples N -Value Feet Comments Depth 0 Recovery E RQD., % Water Table — — 162 0 50 100 GRAVEL; coarse gravel, angular, (railroad ballast o o.o 1 rock). 0 0 2 ° 159.5_ 3 Stiff to very stiff silty CLAY; red brown, damp, medium j 2.5 SS -11 -1 19 4 plasticity, blocky, (Off). 5 / • SS -11 -2 13 6 / 7 / 155.0_ 0 Stiff SILT; brown mottled light brown, orange and 7.0 - black, moist, low plasticity, blocky, (Qff). SS - 11 - 11 • . Ground 8 water table 9 at 7.5 feet during • drilling. 10— SS-11-4 14 11 12 149.0 SS -11 -5 120 13 Very stiff clayey SILT; grey, moist, medium plasticity, 13.0 blocky, (Qff). 14 15 Becomes hard. SS -11-6 40 16 17 18 19 20— SS - 11 - 7 • 41 21 22 23 24 25 Becomes very stiff, grey mottled orange brown. SS -11-8 20 26 135.5 Bottom of boring at 26.5 feet. 26.5 Project No.: 2042026 Boring Log: BH -11 Surface Elevation: 162.0 feet (Approx.) Beaverton - Wilsonville Commuter Rail Date of Boring: August 12, 2004 Washington County, Oregon ' k' Foundation Engineering, Inc. Page 1 of 1 1 Depth. Soil and Rock Description • Elev. • SPT, • Moisture, % Installations/ Feet and Log Samples N -Value Comments Depth [1 Recovery R RQD., % Water Table 123 0 50 100 GRAVEL; coarse gravel, angular, (railroad ballast 0 0.0 1 rock). 0 • 0 2 ° 120.5 3 Soft SILT; grey mottled orange brown to black, damp, 2.5 SS - 16 - 4 . low plasticity, (Off). 4 118.5 Stiff silty CLAY; grey mottled brown and black, damp, f 4.5 5 medium plasticity, (Qff). /',/ /� SS - 16 - 9 • 6 �/� 7 / /, / / 8 AI 115.0_ SH -16-3 _ Ground Dense to very dense GRAVEL; trace to some silt and 00 8.0 SS - 16 - 4 ♦ water table sand, brown, moist, low plasticity silt, fine to coarse o o , 44 at 7.5 feet 9 gravel, subangular to subrounded, some moderately ° • during weathered gravel, basalt, (Qfc). O , drilling. 10— ° 0 SS -16-5 51 ? . 11 0 00 . a A, 12 ° ' oo OA a , . . 13 ° OA, 14 °O o , 15 • 0 o SS - 1 6 - 6 1r 51 O , 16 ° OA, 17 ° O 00, 18 ° o . OA 19 ° o o • OA, 20 — ° o A 0 O , SS-16-7 38 o 21 0 o Q , • 22 0 ° 00 , 0 23 O o 0 , 24 ° 0 o 99.0_ Medium stiff clayey SILT; grey, moist, low to medium ' 1 24.0 plasticity, (Off). • 25 10/11 I SS 6 ll 7 - 26 0 0 96.5_ • Bottom of boring at 26.5 feet. 26.5 Project No.: 2042026 Boring Log: BH -16 Surface Elevation: 123.0 feet (Approx.) Beaverton- Wilsonville Commuter Rail Date of Boring: August 12, 2004 Washington County, Oregon 'I hi' Foundation Engineering, Inc. , = Page 1 of 1 Depth I Soil and Rock Description Elev. A SPT, • Moisture, Installations/ and Log Samples N -Value Feet Comments Depth 0 Recovery 3 RQD., % Water Table _ 155 0 50 100 Very stiff SILT; trace sand, gravel and organics 0.0 (roots), brown, damp, low plasticity, fine sand, (Qff). 1 • 2 3 SS -23-1 20 4 Becomes SILT; trace to some clay, trace gravel, • moist, medium plasticity. 5 149.5 SS -23 2 ' .. 56 : : . 6 Very dense, silty GRAVEL; brown, moist, low °� C 5 .5 plasticity, fine to coarse gravel, subrounded to o e subangular, (Qfc). O L olo 7 ookic SS-23-3 5 /5" 8 o�a Q o' 'pc 146.0 Bottom of boring at 8.9 feet. Auger refusal at 7.5 feet. 4 9.0 Project No.: 2042026 Boring Log: BH -23 Surface Elevation: 155.0 feet (Approx.) Beaverton - Wilsonville Commuter Rail Date of Boring: July 19, 2004 Washington County, Oregon _ Foundation Engineering, Inc. Page 1 of 1