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Hearings Officer Packet - 09/25/1995• • CITY OF TIGARD HEARING'S OFFICER SEPTEMBER 25,1995 - 7:00 P.M. 13125 SW HALL BOULEVARD TIGARD, OR 97223 CITY OF TIGARD OREGON --------_(1?1? c74ngone Wishing to speak on An agenda item should sign on the appropriate sign-in sheet(s). PUBLIC NOTICE: Assistive Listening Devices are available for persons with impaired hearing and should be scheduled for Planning Commission meetings by noon on the Monday prior to the meeting. Please call (503) 639- 4171, Ext. 320 (voice) or (503) 684-2772 (TDD - Telecommunications Devices for the Deaf). Upon request, the City will also endeavor to arrange for the following services: ? Qualified sign language interpreters for persons with speech or hearing impairments; and ? Qualified bilingual interpreters. Since these services must be scheduled with outside service providers, it is important to allow as much lead time as possible. Please notify the City of your need(s) by 5:00 p.m. on the Wednesday preceding the meeting date at the same phone numbers as listed above. [OVER FOR MEETING AGENDA ITEMM 00 TIGARD HEARINGS OFFICER - 9/25/95 PAGE 1 OF 2 h:Uogin\patty\agendho9.25 • CITY OF TIGARD HEARINGS OFFICER SEPTEMBER 25, 1995 - 7:00 P.M. AGENDA 1. CALL TO ORDER 2. PUBLIC HEARING 2.1 SENSITIVE LANDS REVIEW (SLR) 95-0013 ? DURHAM BRIDGE Q A request for Sensitive Lands Review approval to allow the removal of an existing bridge over Fanno Creek and construct a new bridge. LOCATION: SW Durham Road crossing of Fanno Creek. APPLICABLE REVIEW CRITERIA: Community Development Code Chapter 18.84. ZONE: I-P (Industrial Park). The Industrial Paris zoning allows public agency administrative services, public support facilities, professional and administrative services, financial, insurance, and real estate services, business support services, manufacturing of finished products, packaging and processing, wholesale, storage, and distribution, among other uses. 3. OTHER BUSINESS 4. ADJOURNMENT TIGARD FIEARINGS OFFICER - 9/25/95 PAGE 2 OF 2 h:Vogin\pattylagendho9.25 r TIGARD HEARINGS OFFICER CITY OF TIGARD OREGON NOTICE: ALL PERSONS DESIRING TO SPEAK ON ANY ITEM MUST SIGN THEIR NAME AND NOTE THEIR ADDRESS ON THIS SHEET ...(Please PRINT) AGENDA ITEM #: 2.1 DATE OF HEARING: 9/25/95 Page 1 of 2 FCASE NUMBER(S): SENSITIVE LANDS REVIEW (SLR) 95-0013 OWNER/APPLICANT: DURHAM BRIDGE LOCATION: SW DURHAM ROAD CROSSING OF FANNO CREEK FMAP(S) & TAX LOT(S) NO(S). =NOT APPLICABLE PLEASE PRINT YOUR NAME, ADDRESS, AND INCLUDE YOUR ZIP CODE --------------- PROPONENT (For the proposal) OPPONENT (Against the proposal) (Print Name/Address/Zip & Affiliation) (Print Name/Address/Zip & Affiliation) Name: Name: Address: Address: City: State: Zip: City: State: Zip: Name: Name: Address: Address: City: State: Zip: City: State: Zip: Name: Name: Address: Address: City: State: Zip: City: State: Zip: Name: Name: Address: Address: City: State: Zip: City: State: zip: Name: Name: Address: Address: City: State: Zip: City: State: zip: h.\login\patty\s ign inho.mst 0,10 41• BEFORE THE LAND USE HEARINGS OFFICER FOR THE CITY OF TIGARD, OREGON Regarding an application by the City of Tigard for a ) FINAL ORDER sensitive lands review to alter land in a 100-year floodplain ) to replace the Durham Road brige over Fanno Creek ) SLR 95-0013 in the City of Tigard, Oregon ) (Durham Road Bridge) 1. FINDINGS ABOUT SITE, SURROUNDINGS AND PUBLIC FACILITIES The hearings officer incorporates by reference the findings about the site and surroundings in Sections I and II of the City of Tigard Staff Report (the "Staff Report") and the agency comments in Section IV of the Staff Report. H. APPLICABLE APPROVAL STANDARDS AND RESPONSIVE FINDINGS The hearings officer incorporates by reference the approval standards and the findings in response to them in Section III of the Staff Report. III. HEARING AND RECORD 1. Hearings Officer Larry Epstein received testimony at the public hearing about this application on September 25, 1995. A record of that testimony is included herein as Exhibit A (Parties of Record), Exhibit B (Taped Proceedings), and Exhibit C (Written Testimony). These exhibits are filed at the Tigard City Hall. 2. At the hearing, city planner Will D'Andrea summarized the Staff Report. William Evans appeared on behalf of the applicant and accepted the Staff Report without objections or corrections. No one else appeared in person or in writing. IV. SITE VISIT BY HEARINGS OFFICER The hearings officer visited the site and surrounding area. He observed the existing access to and structures, vegetation, and grades on the site and adjoining property and the condition of the adjoining streets. V. CONCLUSION AND DECISION 1. The hearings officer concludes that the proposed Sensitive Lands Review complies with the applicable criteria and standards of the Community Development Code, provided development that occurs after this decision complies with applicable local, state, and federal laws. 2. In recognition of the findings and conclusions contained herein, and incorporating the Staff Report and other reports of effect agencies and public testimony and exhibits received in this matter, the Hearings Officer hereby approves SLR 95-0013, subject to the following conditions of approval: a. Before the city authorizes development permitted by this decision, the applicant shall: (1) Submit to the city a copy of the permit issued by the US Army Corps of Engineers and Oregon Division of State Lands for the development, or evidence that such permits are not required by those agencies; and Hearings Officer Final Order SLR 95-0013 (Durham Road Bridge) Page 1 •, •• (2) Submit to the city engineering division an erosion control plan consistent with Unified Sewerage Agency R & O 91-47 and receive approval of that plan. b. Before the applicant removes trees with a diameter of more than 6 inches, the applicant shall submit to the city an application for a tree removal permit and shall receive approval of that application. DATED this 29th day of September, 1995. Larry Eps,Cein,Ae?L/s I? City of T' and Officer Hearings Officer Final Order SLR 95-0013 (Durham Road Bridge) Page 2 • • BEFORE THE LAND USE HEARINGS OFFICER FOR THE CITY OF TIGARD, OREGON Regarding an application by the City of Tigard to construct a bridge over Fanno, located on SW Durham Road. This development is within the 100-year floodplain. 1. SUMMARY OF THE REQUEST CASE: Sensitive Lands Review STAFF REPORT SLR 95-0013 SLR 95-0013 SUMMARY: A request for Sensitive Lands Review to construct a bridge over Fanno Creek, located on SW Durham Road. The bridge is located within the 100-year floodplain. APPLICANTS: W&H Pacific OWNER: Oregon Department of Transportation 8415 SW Nimbus Ave. 123 NW Flanders Beaverton, OR 97280 Portland, OR 97280 COMPREHENSIVE PLAN DESIGNATION: I-L (Light Industrial) ZONING DESIGNATION: I-P (Industrial Park) LOCATION: SW Durham Road crossing of Fanno Creek. East of SW 76th Avenue and west of SW 74th Avenue. APPLICABLE LAW: Community Development Code Chapter 18.84. Comprehensive Plan Policies 2.1.1, 3.1.1, 3.2.1, 3.2.2, 3.5.4, 4.2.1 STAFF RECOMMENDATION: Approval with Conditions. II. SITE AND VICINITY INFORMATION A. Background Information: HEARINGS OFFICER - SLR 95-0013 - DURHAM BRIDGE / ODOT Pagel • No other development applications have been filed with the City of Tigard. B. Site Information and Proposal Description: The area of the proposed work is east of the intersection of SW Durham Road and SW 76th Avenue and west of the intersection of SW Durham Road and SW 74th Avenue. The proposed work is on both sides of the bridge within the SW Durham Road right- of-way. No structures are located in the area with exception of the existing bridge and roadway. The applicant proposes to remove the existing bridge and replace it with a new 100- foot clear span structure. The bridge construction includes removal and fill within a floodplain and placement of riprap for slope protection. The proposal requires a sensitive lands permit as construction will take place within the 100-year floodplain of Fanno Creek. C. Vicini Information: The adjacent properties to the northwest are zoned R-12 (Residential, 12 units per acre), property to the northeast, south, and west are zoned I-P (Industrial Park). The surrounding area is developed with a mix of residential and industrial uses. III. APPLICABLE APPROVAL STANDARDS AND REQUEST EVALUATION A. COMMUNITY DEVELOPMENT CODE: Chapter 18.84 contains regulations for lands within 100-year floodplains that are subject to Sensitive Lands Review. Sensitive Lands Review of proposed developments in these areas is intended to implement floodplain protection measures and to protect rivers, streams and creeks by minimizing erosion, promoting bank stability, maintaining and enhancing water quality and fish and wildlife habitat, and preserving scenic quality and recreational potential. Section 18.84.015(E) requires Hearings Officer approval for a Sensitive Lands Permit within the 100-year floodplain. Chapter 18.84.040(A) states that the appropriate approval authority shall approve or approve with conditions an application request within the 100-year floodplain in HEARINGS OFFICER - SLR 95-0013 - DURHAM BRIDGE / ODOT Page2 • 0 subsections 18.84.015(B) and (E) based upon findings that all of the following criteria have been satisfied: 1. Land form alterations shall preserve or enhance the floodplain storage function and maintenance of the zero foot rise floodway shall not result in any encroachments, including fill, new construction, substantial improvements, and other development unless certified by a registered professional engineer that the encroachment will not result in any increase in flood levels during the base flood discharge. The applicant has submitted a Certification of a "No-Rise" Determination for a proposed floodway development in conformance with the requirements of the Federal Emergency Management Agency. The appendix of the Certification tabulates the results of the applicant's hydraulic analysis showing maintenance of the zero-foot rise floodway . Approximately 600 cubic yards of material will be placed within the limits of the floodplain. Floodplain storage will be mitigated by removal of an equivalent amount of material under the bridge and immediately southeast of the bridge. The proposed structure removes obstructions in the floodplain and improves conveyance of the floodway. 2. Land form alterations or developments within the 100 year floodplain shall be allowed only in areas designated as commercial or industrial on the comprehensive plan land use map, except that alterations or developments associated with community recreation uses, utilities, or public support facilities as defined in Chapter 18.42 of the Community Development Code shall be allowed in areas designated residential subject to applicable zoning standards. The Comprehensive Plan designation for this parcel is I-L (Light Industrial). 3. Where a land form alteration or development is permitted to occur within the floodplain it will not result in any increase in the water surface elevation of the 100 year flood. The applicant's hydraulic analysis indicates maintenance of the zero-foot rise floodway. 4. The land form alteration or development plan includes a pedestrian/bicycle pathway in accordance with the adopted pedestrian/bicycle pathway plan, unless the construction of said pathway is deemed by the Hearing Officer as untimely. The bridge will HEARINGS OFFICER - SLR 95-0013 - DURHAM BRIDGE / ODOT Page3 • • incorporate two shoulders suitable for bicycle traffic. SW Durham Road is not designated as a proposed pedestrian/bicycle path as contained in the Tigard Parks Master Plan. 5. The plans for the pedestrian/bicycle pathway indicate that no pathway will be below the elevation of an average annual flood. This proposal does not contain a plan for a pathway. The bikepath on the bridge will be above the elevation of the average annual flood. 6. The necessary U. S. Army Corps of Engineers and State of Oregon Land Board, Division of State Lands approvals shall be obtained. The applicant has states that a joint fill permit application for the Army Corps of Engineers and Division of State Lands is being processed. The applicant shall provide the City of Tigard a copy of that approved permit. 7. Where land form alterations and/or development are allowed within and adjacent to the 100 year floodplain, the City shall require the dedication of sufficient open land area within and adjacent to the floodplain in accordance with the comprehensive plan. This proposal is on public right-of-way and does not contain property which could be be dedicated for pathway purposes. Chapter 18.84.040(C) states that the Director shall approve or approve with conditions an application request for a sensitive lands permit within drainageways based upon findings that all of the following criteria has been satisfied: 1. The extent and nature of the proposed land form alteration or development will not create site disturbances to the extent greater than that required for the use. The disturbance is the minimum disturbance necessary to accomodate the bridge replacement. The replacement will increase the conveyance of the floodway along this section of the creek. 2. The proposed land form alteration or development will not result in erosion, stream sedimentation, ground instability, or other adverse on- site and off-site effects or hazards to life or property. During construction, erosion and sediment control will be applied in HEARINGS OFFICER - SLR 95-0013 - DURHAM BRIDGE / ODOT Page4 0 0 accordance with Unified Sewerage Agency requirements. Slopes steeper than 2:1 will be stabilized with riprap. Construction will require an erosion control plan, approved by the Engineering Department, in conformance with Unified Sewerage Agency Resolution and Order 91-47. 3. The water flow capacity of the drainageway is not decreased. The hydraulic analysis concluded that the capacity of the drainageway, as well as the flooplain will not be decreased or negatively impacted. 4. Where natural vegetation has been removed due to land form alteration or development, the areas not covered by structures or impervious surfaces will be replanted to prevent erosion in accordance with Chapter 18.100, Landscaping and Screening. The minimal amount of vegetation loss expected with construction will be replanted. Erosion control measures shall also be taken during construction. The applicants construction plans shall be reviewed and approved by the Engineering Department. 5. The drainageway will be replaced by a public facility of adequate size to accommodate maximum flow in accordance with the adopted 1981 Master Drainage Plan. This requirement is not applicable as the drainageway will not be impaired by the bridge's construction. 6. The necessary U. S. Army Corps of Engineers and State of Oregon Land Board, Division of State Lands approvals shall be obtained. As discussed in the previous section, permits have been applied for and a copy of the permits will be sent to the City. 7. Where landform alterations and/or development are allowed within and adjacent to the 100 year floodplain, the City shall require the dedication of sufficient open land area within and adjacent to the floodplain in accordance with the Comprehensive Plan. This area shall include portions of a suitable elevation for the construction of a pedestrian/bicycle pathway within the floodplain in accordance with the adopted pedestrian bicycle pathway plan. As discussed in the previous section, dedication is not required. HEARINGS OFFICER - SLR 95-0013 - DURHAM BRIDGE / ODOT Page5 0 0 Sensitive Lands: Section 18.84.040(B) states that the Director shall approve an application for sensitive lands permit on slopes of 25% or greater based upon findings that all of the following criteria have been satisfied: 1. The extent and nature of the proposed land use form alteration or development will not create site disturbances to an extent greater than that required for the use. As discussed in the previous section, the development is the minimum disturbance necessary. 2. The proposed land form alteration or development will not result in erosion, stream sedimentation, ground instability, or other adverse on- site and off-site effects or hazards to life or property. This project does not change on-site or off-site drainage. As discussed in the previous section, erosion control measures will be taken in accordance with U.S.A. standards. 3. The structures are appropriately sited and designed to ensure structural stability and proper drainage of foundation and crawl space areas for development with any of the following soil conditions: wet/high water table; high shrink-swell capability; compressible%rganic; and shallow depth-to-bedrock. The bridge is a 100 foot clear span design with two bents, one at each end, supported by pilings. The bridge span is supported at the top of the bank and will therefore be structurally stable. The banks of the creek shall be stabilized with riprap. 4. Where natural vegetation has been removed due to land form alteration or development, the areas not covered by structures or impervious surfaces will be replanted to prevent erosion in accordance with Chapter 18.100, Landscaping and Screening. As previously discussed, the minimal amount of vegetation loss expected with construction will be revegetated. Erosion control measures shall also be taken during construction. Chapter 18.84.040(D) states that the Director shall approve or approve with conditions an application request for sensitive lands permit within wetlands based upon findings that all of the following criteria have been satisfied: HEARINGS OFFICER - SLR 95-0013 - DURHAM BRIDGE / ODOT Page6 0 a 1. The proposed landform alteration or development is neither on wetland in an area designated as significant wetland on the Comprehensive Plan Floodplain and Wetland Map nor is within 25 feet of such a wetland. The site is within a wetland area but it is not designated as significant wetland on the Comprehensive Plan Floodplain and Wetland Map, nor is it within 25 feet of such a wetland. 2. The extent and nature of the proposed landform alteration or development will not create site disturbances to an extent greater than the minimum required for the use. The disturbance is the minimum disturbance necessary to accomodate the bridge at the top of the bank. The area of work is on the creek banks. 3. Any encroachment or change in on-site or off-site drainage which would adversely impact wetland characteristics have been mitigated. This project does not change on-site or off-site drainage. 4. Where natural vegetation has been removed due to landform alteration or development, erosion control provisions of the Surface Water Management program of Washington County must be met and areas not covered by structures or impervious surfaces will be replanted in like or similar species in accordance with Chapter 18.100, Landscaping and Screening. As previously discussed, the minimal amount of vegetation loss expected with construction will be revegetated. Erosion control measures shall also be taken during construction. 5. All other sensitive lands requirements of this chapter have been met. Other sensitive lands requirements have been met as addressed in this report. 6. The provisions of Chapter 118.150, Tree Removal, shall be met. The applicant has not provide information regarding the presence or removal of trees. The applicant shall apply for a tree removal permit for removal of trees greater than 6 inches in diameter. 7. Physical Limitations and Natural Hazards, Floodplains and Wetlands, Natural Areas, and Parks, Recreation and Open Space policies of the HEARINGS OFFICER - SLR 95-0013 - DURHAM BRIDGE / ODOT Pagel Comprehensive Plan have been satisfied. Applicable Comprehensive Plan Policies are satisfied as discussed, in Section B Comprehensive Plan Policies, below. B. COMPREHENSIVE PLAN POLICIES. 1. Policy 2.1.1 provides the City will assure that citizens will be provided an opportunity to participate in all phases of the planning and development review process. Policy 2.1.1 is satisfied because the applicant held a neighborhood meeting, notice of the application and public hearing on this item was provided to owners of property in the vicinity of the site and in a newspaper of general circulation. 2. Policy 3.1.1 provides that the City shall not allow development in areas meeting the definition of wetlands under chapter 18.26 or areas having slopes in excess of 25% except where it can be shown that established and proven engineering techniques related to a specific site plan will make the area suitable for the proposed development. (Note: This policy does not apply to lands designated as significant wetlands on the floodplain and wetlands map.) Policy 3.1.1 is satisfied because engineering techniques will make the site suitable for the proposed bridge and the applicable approval criteria for development in wetland areas have been satisfied. 3. Policy 3.2.1 provides that the City will prohibit any development within the 100 year floodplain that would result in any rise in elevation of the 100 year floodplain. Policy 3.2.1 is satisfied because this proposal will not result in any rise in the elevation of the 100-year flooplain. 4. Policy 3.2.2 provides that the City shall prohibit development in the floodway, except if the alteration preserves or enhances the function and maintenance of the zero foot rise floodway. Policy 3.2.2 is satisfied because this development will preserve the function and maintenance of the zero-foot rise floodway. 5. Policy 3.5.4 provides that the City provide an interconnected pedestrian/bikepath throughout the City. Policy 3.5.4 is satisfied because this bridge will accommodate a pedestrian/bikeway system. HEARINGS OFFICER - SLR 95-0013 - DURHAM BRIDGE / ODOT Page8 0 a 6. Policy 4.2.1 provides that all development within the Tigard Urban Planning Area shall comply with applicable federal, state and regional water quality standards. Policy 4.2.1 shall be satisified as construction shall comply with erosion control measures for the Tualatin River Basin. IV. AGENCY COMMENTS 1. The City of Tigard Engineering Department has reviewed the proposal and has provided the following comments: The CDC at 18.84.04A1,3 requires that the fill and bridge structure "shall preserve or enhance the floodplain storage function and maintenance of the zero- rise floodway shall not result in any narrowing of the floodway boundary" and "will not result in any increase in the water surface elevation of the 100-year flood". Moreover, the City's Master Drainage Plan recommends that "the existing zero-rise floodway ... should be used along this reach to ensure an adequate flow area for the 100-year flood". The applicant has submitted a Certification of a "No-Rise" Determination for a Proposed Floodway Development in conformance with the requirements of the Federal Emergency Management Agency. This Certification demonstrates compliance with the CDC and Master Drainage Plan by mitigating the placement of fill by removing an equivalent amount of material under the bridge and immediately southeast of the bridge. The proposed bridge will remove obstructions to flow and improve conveyance of the floodway. The appendix of the Certification tabulates the results of the Applicant's hydraulic analysis showing maintenance of the zero-foot rise floodway. 2. The City of Tigard Public Works Department, Building Division, Tigard Police Department, and Washington County Department of Land Use and Transportation have reviewed this proposal and have no objections to this proposal. 3. The Unified Sewerage Agency states that Fanno Creek is floodplain / floodway designated. Berm over waterline could cause violation of R&O 91-47/91-75, Chapter 6 sections 6.06 & 6.07. 4. GTE states that GTE has established work order 5460-71700IBP for the removal, temporary relocation and replacement of the telephone facilities across Fanno Creek on Durham Road. Please contact Jim Wieskamp, Senior Engineer-OSP, (620-5943) if you have any questions concerning the project. HEARINGS OFFICER - SLR 95-0013 - DURHAM BRIDGE / ODOT Page9 0 a 5.. No additional comments have been recieved. VI. CONCLUSION AND RECOMMENDATION Staff concludes that the proposed impacts to Sensitive Lands Areas comply with the applicable approval criteria for issuance of a Sensitive Lands Permit. Staff recommends the approval of SLR 95-0013 subject to the following conditions : 1. Copy of the joint fill permit application for the Army Corps of Engineers and Division of State Lands. 2. Tree removal permit for trees greater than 6 inches in diameter. 3. An erosion control plan shall be provided and reviewed by the Engineering Department. The plan shall conform with Unified Sewerage Agency R&O 91-47. THIS APPROVAL SHALL BE VALID FOR EIGHTEEN MONTHS OF THE EFFECTIVE DATE OF THIS DECISION. Prepared by: 4Aet" William D'Andrea Assistant Planner Approved by: Dick Bewersdorff Senior Planner Date Date HEARINGS OFFICER - SLR 95-0013 - DURHAM BRIDGE / ODOT Page10 LZ/ -? Z a' CL w 0 CD z z z J CL 0 oC a LL O U PLOT PLAN EXHIBIT MAP r d W? Ilk 4 i k?2 i rzi CASE NO. SLR 95-0013 DURHAM BRIDGE (Fanno Creek). 0 0 W 0 V Z Z z a 0 a c? LL O NO SCALE VICINITY EXHIBIT MAP U CASE NO. SLR 95-0013 DURHAM BRIDGE (Fanno Creek) SEC.12, T.2S., R.1 W., W.M. LOCATION MAP /' • • COMMUNITY NEWSPAPERS, INC. P.O. BOX 370 PHONE (503) 684-0360 BEAVERTON. OREGON 97075 Legal Notice Advertising *City of Tigard • ? Tearsheet Notice 13125 SW Hall Blvd. • Tiggrd,Oregon 97223-8199 • ? Duplicate Affidavit 'Accounts Payable-Terry • AFFIDAVIT OF PUBLICATION STATE OF OREGON, ) COUNTY OF WASHINGTON, )ss' I, Kathy Snyder being first duly sworn, depose and say that I am the Advertising Director, or his principal clerk, of the Tigard-Tualatin Times a newspaper of general circulation as defined in ORS 193.010 and 193.020; published at Tigard in the aforesaid county and state; that the _SPnSif- i a TandS Review 95 nn1'1 Durhar^ nridg( a printed copy of which is hereto annexed, was published in the entire issue of said newspaper for ONE successive and consecutive in the following issues: September 14 ,1925 Legal Notice TT 8 3 0 6 The following will be considered by the Tigard Hearings Officer on Mon- day, September 25, 1995, at 7:00 P.M., at Tigard Civic Center - Town Hall, 13125 S.W. Hall Boulevard, Tigard, Oregon. Both public, oral and written testimony is invited. The public hearing on this matter will be con- ducted in accordance with the rules of Chapter 18.32 of the Tigard Municipal Code, and rules and procedures of the Hearings Officer. Failure to raise an issue in person or by letter accompanied by statements or evidence sufficient to allow the hearing's authority and all parties to respond precludes an appeal, and failure to specify the criterion from the Community Development Code or Comprehensive Plan at which a com- ment is directed precludes an appeal based on that criterion. Further infor- mation may be obtained from the Planning Division at 13125 S.W. Hall Boulevard, Tigard, Oregon 97223, or by calling (503) 639-4171. PUBLIC HEARING: SENSITIVE LANDS REVIEW (SLR) 95-0013 DURHAM BRIDGE A request for Sensitive Lands Review approval to allow the removal of an existing bridge over Fanno Creek and construct a new bridge. LOCA- TION: S.W. Durham Road crossing of Fanno Creek. APPLICABLE REVIEW CRITERIA: Community Development Code Chapter 18.84. ZONE: I-P (Industrial Park). The Industrial Park zoning allows public agency administrative services, public support facilities, professional and administrative services, financial, insurance, and real estate services, busi- ness support services, manufacturing of finished products, packaging and processing, wholesale, storage, and distribution, among other uses. TT8306 - Publish September 14, Subscribed and sworn to before me this 14t, 1 day of Pete OFFICIAL SEAL JACQUELINE ARELLANO NOTARY PUBLIC-OREGON Notary Public for Oregon CO MMISSION NO 023140 My Commission Expires: MY COMMISSION EXPIRES JUNE 9, 1997 AFFIDAVIT E 0 EXHIBIT A •s -CITY OF TIGARD, OREGON SENSITIVE LANDS APPLICATION CITY OF TIGARD, 13125 SW Hall, PO Bog 23397 Tigard, Oregon 97223 - (503) 639-4171 00 FOR STAFF USE ONLY CASE NO.. OTHER CASE NO'S: ' RECEIPT NO. APPLICATION ACCEPTED BY: DATE: 1. GENERAL INFORMATION Application elements submitted: PROPERTY ADDRESS/LOCATION Durham Road at Fanno Creek I (A) Application form (1) crossing ? (B) Owner's signature/written TA3t MAP AND TAX LOT NO. authorization (C) Title transfer instrument (1) SITE SIZE NIA I (D) Assessor's map (1) r`PERTY OWNER/DEED HOLDER* ODOT (E) Plot plan (pre-app checklist) ADDRESS 123 NW Flanders PHONE 731-8200 (F) Applicant's statement Portland, Oregon 97 CITY ZIP 209-4037 ? (pre-app checklist) APPLICANT* W&H Pacific, Inc. ADDRESS 8405 S.W. Nimbus Ave. CITY Beaverton, Oregon PHONE 626-0455 ZIP 97280 *When the owner and the applicant are different people, the applicant must be the purchaser of record or'a leasee in possession with written authorization from the owner or an agent of the owner with written authorization. The owner(s) must sign this application in the space provided on page two or submit a written authorization with this application. 2. PROPOSAL SUMMARY The owners of record of the subject property request a Sensitive Lands Permit to allow Widening of Durham Road, Removal of existing Fanno Creek Bridge, Construction of new bridge. 1 (G) List of property owners and addresses within 250 feet (1) s (H)' Filing fee ($520) DATE DETERMINED TO BE COMPLETE: FINAL DECISION DEADLINE: COMP. PLAN/ZONE DESIGNATION: N.P.O. Number: Approval Date: Final Approval Date: Planning 0523P/13P Revd: 3/88 Engineering Q PACIFIC DURHAM SENSITIVE LANDS MEETING ATTENDEE'S: Ralph Dundee 7910 S.W. Durham Rd. 639-1057 Jack Birtham 15525 S.W. 109th 684-1362 M. M. Goble 8025 S.W. Durham 639-5849 Sheri Wartland 234 Cervantes 635-8588 Ed Catter 8065 S.W. Durham Rd. 639-2407 Mrs. Goble Carl H. Johnson 8965 S.W. Burnhaust 639-5263 Bill Ihly Washington County Jim Evans W&H Pacific • • HELD: Public meeting for Tigard Sensitive Lands Permit July 31, 1995 at 7pm at Tigard High School. The meting was a requirement by the City of Tigard. The meeting was attended by seven citizens of the area Opened the meeting with an overview of the purpose of the meeting (to discuss the plans for the bridge/Fanno Creek area) and a short history of the project and its funding. Jim Evans as Project Manager for the engineering consultant, W&H Pacific. Jim explained the planned improvements from hall to Upper Boones Ferry in general. He then explained, in detail, the planned improvements at the bridge and Fanno Creek area including the plantings in the floodplain mitigation area. There were no objections raised to the planned improvements for the sensitive lands area. The main questions concerned the timing of the project (i.e. how soon would we start and how long will the project take?). AFFIDAVIT OF MAILING STATE OF OREGON ) SS CITY OF TIGAAD ) L2EIj]'4S , being duly sworn, depose and say that on (Ness. Tyo- 13 ? is s, 1 caused to have mailed to each of the persons on the attac:led flat a notices of a meeting to disc=ss a proposed development at ('ANoci CE?-alC koNt< DJ2wA-^ &40 a copy of which notica so mailed' is attached hereto and made a part of hereof- I further state thhat said notices were enclosed in envelopes plainly addressed to said persons and were deposited on the date indicated above in the United States Post Office at 00,ly-e I ?j with postage prepaid thereon. Subscribed and sworn to before me this ER =ORE 6419 MMYC:OiAMISSION EGON LY 19, 1998 J Sign day of 19_. 1 Notary Public res: My Commission Expi h:\IcSin\io\ai'maA.ct • • • • July 13, 1995 Sample BURLINGTON NORTHERN RAILROAD 999 3RD AVENUE, #2000 SEATTLE, WA 98104 Re: Fanno Creek Bridge along Durham Road Washington County is representing the Oregon Department of Transportation (ODOT) along Durham Road at Fanno Creek. The county and ODOT are proposing a sensitive lands application for the replacement and construction of a new bridge at this location. Prior to applying to the City of Tigard for the necessary permits, we would like to discuss the proposal in more detail with the surrounding property owners and residents. You are invited to attend a meeting on: Monday, July, 31, 1995 Tigard High School Cafeteria 9000 SW Durham Road 7:00 pm Please notice this will be an informational meeting to discuss this proposal and to provide a final overview and update on the project schedule for construction. We look forward to more specifically discussing the proposal with you. Please call me at 693- 4461, if you have any questions. Bill Ihly Project Coordinator, Washington County •16 •• B & R Investments ATTN: Valeria & James Addington ATTN: Gordon/Melissa Barrett 8465 SW Durham Rd 16255 SW Upper Boones Ferry Rd 15987 SW 81st Ct Tigard, OR 97224 Tigard, OR 97224 Tigard, OR 97223 ATTN: Judith A. Benjamin ATTN: Jack Biethan ATTN: Richard/Teresa Bowen 15695 SW 81st Ct 15525 SW 109th Ave 8175 SW Durham Rd Tigard, OR 97223 Tigard, OR 97224 Tigard, OR 97224 Burlington Northern RR ATTN: David & Daniel Case ATTN: James & Audrey Castile 999 3rd Ave #2000 4630 SW 39th 8100 SW Durham Rd Seattle, WA 98104 Portland, OR 97221 Tigard, OR 97224 ATTN: Charles & Joyce Coiling ATTN: Edward & Viola Cotter ATTN: John & Janice Duncan 8385 SW Durham Rd 8065 SW Durham Rd 16055 SW 74th Ave Tigard, OR 97224 Tigard, OR 97223 Tigard, OR 97223 ATTN: Ralph & Mary Durkee ATTN: Marion & Bettie Goble ATTN: Michael & Linda Halseth 7910 SW Durham Rd 8025 SW Durham Rd 7975 SW Durham Rd Tigard, OR 97224 Tigard, OR 97223 Tigard, OR 97224 ATTN: Harold/Mildred Hambach ATTN: Craig Hopkins ATTN: Carl Johnson 7735 SW Durham Rd 7430 SW Varns St 200 James St #407 Tigard, OR 97224 Tigard, OR 97223 Edmonds, WA 98020 PGE ATTN: Werner & Inge Knebel ATTN: Mike Livingston ATTN: Lydia Lundberg 8335 SW Durham Rd 121 SW Salmon St 10355 SW Porter Tigard, OR 97224 Portland, OR 97204 Portland, OR 97225 Mt. Hood Chemical Corp ATTN: Mark Mahon ATTN: David & Dianne Metzger 11310 SW 91st ct PO Box 275 4444 NW Yeon Ave Tigard, OR 97223 Sherwood, OR 97140 Portland, OR 97210 ATTN: Michael Newberry ATTN: William Reed ATTN: Ernest & Rose Rivas 15954 SW 81st Ct 10355 SW Porter 2118 SE Main St Tigard, OR 97223 Portland, OR 97225 Portland, OR 97213 ATTN: Deborah Sayler ATTN: Dale Shoewe ATTN: Joel Stevens 15976 SW 81st Ct 7925 SW Durham Rd 9660 SW Ventura Ct Tigard, OR 97223 Tigard, OR 97224 Tigard, OR 97223 ATTN: Mary Swinek 9915 SW Freeing #23 Tigard, OR 97223 Tigard School Dst #82 13137 SW Pacific Hwy Tigard, OR 97223 • • Tigard School Dst. #23J 13137 SW Pacific Hwy Tigard, OR 97223 Unified Sewerage Agency ATTN: Pat Wyden ATTN: John Benneth 155 N 1st St 8122 SW Spruce st 1550 SW 109th AVe Hillsboro, OR 97124 Tigard, OR 97223 Tigard, OR 97224 •• . 00 SENSITIVE LANDS APPLICANTS STATEMENT May 26, 1995 The Durham Road project includes widening of Durham Road, the removal of the exiting bridge and the construction of a new 100-foot clear span structure. The Bridge construction includes removal and fill within a flood plain and placement of riprap for slope protection. A. The Hearings Officer shall approve or approve with conditions an application request within the 100-year floodplain based upon findings that all of the following criteria have been satisfied: 1. Land form alterations shall preserve or enhance the floodplain storage function and maintenance of the zero-foot rise floodway shall not result in any narrowing of the floodway boundary; Approximately 600cy of fill material will be placed within the limits of the floodplain. Floodplain storage will be mitigated by removal of an equivalent amount of material under the bridge and immediately southeast of the bridge. The proposed structure removes obstructions in the floodplain and improves conveyance of the floodway. The hydraulic analysis "Durham Road Bridge Crossing of Fanno Creek" shows the maintenance of the zero-foot rise in the floodway. 2. Land form alterations or developments within the 100-year floodplain shall be allowed only in areas designated as commercial or industrial on the comprehensive plan land use map, except that alterations of developments associated with community recreation uses, utilities, or public support facilities as defined in Chapter 18.42 of the Community Development Code shall be allowed in areas designated residential subject to applicable zoning standards; This is a public support facility, and as such is allowed. 3. Where a land form alteration or development is permitted to occur within the floodplain it will not result in any increase in the water surface elevation of the 100-year flood; See Item 1 above. • • • • 4. The land form alteration or development plan includes a pedestrian/bicycle pathway in accordance with the adopted pedestrian/bicycle pathway plan, unless the construction of said pathway is deemed by the Hearings Officer as untimely; The proposed improvements include a 5' bike land and 8' sidewalk on the new bridge section. 5. The plans for the pedestrian/bicycle pathway indicate that no pathway will be below the elevation of an average annual flood; i The proposed bridge:imish=grade is above elevation 133.3. The$ 100-year floodplain is elevation 128.3, therefore, the pedestrian/bicycle pathway is above the average annual. 6. The necessary U.S. Army Corps of Engineers and State of Oregon Land Board, Division of State Lands approvals shall be obtained. A joint fill permit application for the U.S. Army Corps of Engineers and the State of Oregon Land Board, Division of State Lands is being processed. 7. Where land form alterations and/or development are allowed within and adjacent to the 100-year floodplain, the City shall require the dedication of sufficient open land area within and adjacent to the floodplain in accordance with the comprehensive plan. This area shall include portions of a suitable elevation for the construction of a pedestrian/bicycle pathway within the floodplain in accordance with the adopted pedestrian/bicycle pathway plan. Floodplain area within the immediate vicinity of the Fanno Creek floodplain is to be dedicated public right-of-way. B. The Director shall approve or approve with conditions an application request for a sensitive lands permit on slopes of 25 percent or greater or unstable ground based upon findings that all of the following criteria have been satisfied: 1. The extent and nature of the proposed land form alteration or development will not create site disturbances to an extent greater than that required for the use; The area of work is on the creek banks. The alteration is to accommodate the new bridge, provide riprap on the bank and to mitigate storage fill volumes due to the widening of Durham Road. 2. The proposed land form alteration or development will not result in erosion, 2 • • • 0 stream sedimentation, ground instability, or other adverse on-site and off-site effects or hazards to life or property; During construction, erosion and sediment control will be applied in accordance with U.S.A. current standards. Riprap aprons vU be provided under the bridge area above the normal high waterline. Slopes steeper than 2:1 will be stabilized with Rprap. 3. The structures are appropriately sited and designed to ensure structural stability and proper drainage of foundation and crawl space areas for development with any of the following soil conditions: wet/high water table; high shrink-swell capability; compressible/organic; and shallow depth-to- bedrock; and The bridge is a 100-foot clear span design with two bents, one at each end, supported by pilings. Removal of the existing bridge and construction of the new clear span structure will improve stability and drainage. 4. Where natural vegetation has been removed due to land form alteration or development, the areas not covered by structures or impervious surfaces will be replanted to prevent erosion in accordance with Chapter 18.100, Landscaping and Screening. The loss of vegetation will be minimized. See the planting and grading plan for revegetation. C. The Director shall approve or approve with conditions an application request for a sensitive lands permit within drainageways based upon findings that all of the following criteria have been satisfied: 1. The extent and nature of the proposed land form alteration or development will not create site disturbances to the extent greater than that required for the use; The area of work is on the creek banks. The alteration is to accommodate the new bridge, provide rip-ap on the bank and to mitigate storage fill volumes due to the widening of Durham Road. 2. The proposed 'and form alteration or development will not result in erosion, stream sedimentation, ground instability, or other adverse on-site and off-site effects or hazards to life or property; During construction, erosion and sediment control will be applied in accordance with U.S.A. Riprap aprons will provide under the bridge areri effects the normal high waterline. Slopes steeper than 2:1 will be stabilized with rip rap. 3 • • 3. The water flow capacity of the drainageway is not decreased; The drainageway's flow capacity is not impaired by the bridge construction. Removal of the existing bridge and mitigating the floodway fill will remove obstructions within the floodplain and improve conveyance. 4. Where natural vegetation has been removed due to land form alteration or development, the areas not covered by structures or impervious surfaces will be replanted to prevent erosion in accordance with Chapter 18.100, Landscaping and Screening; The loss of vegetation will be minimized. See the planting and grading plan for revegetation. 5. The drainageway will be replaced by a public facility of adequate size to accommodate maximum flow in accordance with the adopted 1981 Master Drainage Plan. The proposed improvement is adequately sized to accommodate maximum flow. 6. The necessary U.S. Army Corps of Engineers and State of Oregon Land Board, Division of State Lands approvals shall be obtained. The necessary U.S. Army Corps of Engineers and State of Oregon Land Board, Division of State Lands approvals shall be obtained; and a joint fill permit application for the U.S. Army Corps of Engineers and the State of Oregon Land Board, Division of State Lands is being processed. 7. Where landform alterations and/or development are allowed within and adjacent to the 100-year floodplain, the City shall require the dedication of sufficient open land area within and adjacent to the floodplain in accordance with the Comprehensive Plan. This area shall include portions of a suitable elevation for the construction of a pedestrian/bicycle pathway within the floodplain in accordance with the adopted pedestrian/bicycle pathway plan. (Ord. 90-29; Ord. 90-22; Ord. 89-06; Ord. 87-66; Ord. 87-32; Ord. 86-08; Ord. 84-29; Ord. 83-52) Floodplain area within the immediate vicinity of the Fanno Creek floodplain is to be dedicated public right-of-way. D. The Director shall approve or approve with conditions an application request for sensitive lands permit within wetlands based upon findings that all of the following criteria have been satisfied: 4 • 0 • • 1. The proposed landform alteration or development is neither on wetland in an area designated as significant wetland on the Comprehensive Plan Floodplain and Wetland Map nor is within 25 feet of such a wetland; This area is not designated as significant on the Comprehensive Plan. 2. The extent and nature of the proposed landform alteration development will not create site disturbances to an extent greater than the minimum required for the use; The area of work is on the creek banks. The alteration is to accommodate the new bridge, prove riprap on the bank and to mitigate storage fill volumes due to the widening of Durham Road. 3. Any encroachment or change in on-site and off-site drainage which would adversely impact wetland characteristics have been mitigated; This project does not change on-site or off-site drainage. 4. Where natural vegetation has been removed due to landform alteration or development, erosion control provisions of the Surface Water Management program of Washington County must be met and areas not covered by structures or impervious surfaces will be replanted in like or similar species in accordance with Chapter 18.100, Landscaping and Screening; The loss of vegetation will be minimized. See the planting and grading plan for revegetation. 5. All other sensitive lands requirements of this chapter have been met; This narrative responds to Section 18.84.40 Approval Standards in its entirety. 6. The provisions of Chapter 18.150, Tree Removal, shall be met. The area of disturbance can be considered developed residential land since no further development can occur in this area; therefore, this area is excluded from the Tree Removal Chapter. 7. Physical Limitations and Natural Hazards, Floodplains and Wetlands, Natural Areas, and Parks, Recreation and Open Space policies of the Comprehensive Plan have been satisfied. (Ord. 90-29; Ord. 89-06; Ord. 87-66; Ord. 87-32; Ord.83-52) 5 The project meets the intent of the Comprehensive Plan. I:\projecM2041302\wpdata\,dur-sens.wpd t • .0 • jo t. I TO NEY TO SALEM fL 0 I ca O IV C O Z H U W 7 O fY a u 3 a X W J A v W _J lv '.. PACIFIC PROJECT LOCATION MAP FIGURE M06 S.W. NL.4- A.- 1 HLAVZN"N. OR 0,006-7120 Durham Road - Fanno Creek Crossing peoo.: (6601 eze-o?n •-: f606, 526-0„6 ry ,_ SW Hall Blvd. - SW Upper Boones Ferry Rd. raw ?a.cl.w s.,.. N 0 r N v O Z W 0 O CL 0_ r J WAu 1-- (FUT) ® Willow/Dogwood ® AshlVine Maple,/Big Leof Mople/Douglas Spireo/Solmonberry NOTE: See Specifications for Planting Pattern and Spacing L3 1 PACIFIC BRIDGE GRADING AND PLANTING PLAN FIGURE o v B°I{GY6IIROB, OR 97008-7120 0S.f. 1-- *•e°°e Durham Road - Fanno Creek Crossing SW Hall Blvd. - SW Upper Boones Ferry Rd. J W?.a.M 11MUe• • d•??u,.nW if ii/ tO Const. 2.1 Slope O2 Const.111.5:1 Slope 0 Inst. Class 700 Rip-Rop - 315` E (For Details, See Sheet 2B-4) O4 Cons t. 5: 1 Cut Slope OS Inst. Class 700 Rip-Rap in Toe Trench Toe Trench Exc. - 125 C. Y. (For Details, See Sheet 26-4) -----• '.5 3 W l1.eWy? ?e[1..?M ?..•.ll ?A.y. vl uuliu f • 10' ale W00 Rip-Rap Per Detail B, 2B-4 Finish Grade I ig F/ \i(`• ? F? ? rte- i / ?,? \' ?..?'(?. _ ?..?? , . ,••?? . i r.?? ? r-.?,? ,1 Ad( AJ Conc. Embankment (By Others) Extg. 12" Water Main SECTION "A-A" (Existing Water Main Coverage N.T.S. Extg. Ground ORDINARY HIGH WATER ELEV. 120 Finish Grade 5:1 Cut Slope SECTION 1'13-13" (Typical Fanno Creek Bank Grading) N.T.S. Extg. Ground 1 ti 1.5:1 t?y^ ? 1.0% 1 N 0 v 0 N Y O Z U W 0 0 o_ Extg. Ground 1.5:1 a' ELEV. 120 (ORDINARY HIGH WATER) CL 700 Rip-Rap SECTION "C-C'7 N.T.S. LD 3 a X W J A P J PACIFIC 6405 S.W. KL b.. A...- SUMMON. OR .70oe-7120 Pnaor. l]071 e..^e-Ol ]] ?.:: fS0e1 ]2e-077] 1.eA...n .r.lll.ewr• mMsm W e+.a..« BRIDGE GRADING PLAN DETAILS Durham Road - Fanno Creek Crossing SW Hall Blvd. - SW Upper Boones Ferry Rd. FIGURE 3 4 - - -e- rr 9oge/ 7- - • Sft. 13, T. 2S., R. I? I- rO't0-?na? . IEEE O N n3 I.7 ? ,y ICU 0 v zz I n U W C O u a X W J N O 1.1 J Sta. 123+23 Rt. 26.5' Const. Type "4A" Inlet Inst. 12" Sew. Pipe - 55' Inst. 15" Sew. Pipe - 330' Sta. 124+70 Lt. 26.5' Const. Type "4A" Inlet w/ Orifice Plate Inst. 15 Sew. Pipe - 55' (For Details, See Sheet 2B-4) Sta. 124+70 Rt. 26.5' Const. Type "4A" Inlet Inst. 15 Sew. Pipe - 147' Sta. 126+87 Lt. & Rt. 26.5' Const. Type 'Mod. 4A" Inlet - 2 Inst. 12 Sew. Pipe - 72' 11 Remove Eztg. Wood Shock PACIFIC MOS S.W. Nlmb- A-- B6AVKMN• OR 07000-7120 P000.: IS071_E26-050 1•z: (!07) 02s-0776 12 13 14 16 19 20 22 16, • ELM. 1 / Reconst. Manhole (By Others) 23 Sta. 124+75 Lt. 44.0' Const. Manhole Reconst. Manhole Inst. 15" Sew Pipe - 61' (For Details, See Sheet 2B-3) Const. Single Spon Conc. Bridge 24 Const. Storm Sewer Outfoll (For Bridge Plans, See Sheets 13- 13C) (For Details, See Sheet 28-4) Relocate Utility Pole - 7 (By Others) 25 Const. 5' Conc. Sidewalk Toper From End of Bridge Panel Const. Compost Storm Filter As Shown - 4 (For Details, See Sheet 2E) Inst. 6" Sew. Pipe - 11' 26 For Grading Under Bridge, Inst. Utility Pole - 6 (By Others) See Sheet 28-6 27 Sta. 124+80 Lt. 35.0' Inst. 6" Thick Conc. Sidewalk with Const. 5' Sedimentation Manhole 6" X 6" IOGo Mesh Inst. 10" Sew Pipe - 19' Sta. 124+17 to Sta. 125+07 (For Details, See Sheet 2B-3) ROADWAY PLAN I FIGURE Durham Road - Fanno Creek Crossing I 4 SW Hall Blvd. - SW Upper Boones Ferry Rd. lv b 8 W N 8 ti a^ C) i-- Qh _ 0 •• 1- 4' •• • • Class I Surface Finish Typ. 48'-0'R6odwuy Width ; 8-6' 5-0" 12'0" 14-0" 12-0" 5-0" 6=6" 1=4" Sidewalk Bike Lone Travel Lone Median Lone Travel Lone Bike Lone Sidewalk A rn 2-Asphalt Concrete Pedestrian Roil On Wearing Surface Structure & Type F' Concrete Z 'Line fridge Roil S/. 002 818 5/. 002 fl/f/ S1. 002 1118 5/. 002 fl/f1 ' --- ?6 1'6 1-0" r C -,"Drip Croove, ! Inserts, TIP. Both Sides Concrete Diaphragms Provide Blackouts In Oiophrogm ?y? Both e 7 points See Waleiproofing For Ulies Determine Size And Shl. 6 For Details Membrane Locolion In Field, Typ. Both Sides 6=5" 7 Beam Spaces 0 7=10'= 54-10"(8 - 54"Deck Bulb Tee Beams) 6-5" 57=8" Out-Out Slruclure I 'NOTE.. 3-11"Dim. Shown Is Nominal. Dimension TYPICAL DECK SECTION Will Vcry Due To Cross Slope. I/4'=I'-0' Richmond Slruclurol Concrete Inserts, Type EC-2F Or EC-2FW Or Equo% For -41 "Bolls p 10=0" Clra. Full Lenglh Of Slruclure, J Places Each Side 2-0' 6-" 0 44 Z4 071" (Epoxy Cooled) Field Bend ,-2-Z4 e 18' (Epoxy Coo 6" 9=/0" 8-6" 7• 1 ? 9=5' ?7, o c •8-,f4, Conl. "4 Le 9- 0 . 22 fl/fl • Sl. 0.02 /1//1 5 ,f4, Conl. f4 40 18 SIDEWALK DETAILS I/2'=1'-O' ADVANCE PLANS NOT FOR CONSTRUCTION OSEC CON5ULTING ENGINEERS KATE ?D, . .7 -lar,':i N II ti Q o Bent 1 Bent 2 0 ? i ? ?- Top Of Beam AC Build-up Thkn. VorleS ACWS BUILD UP DETAIL NO SCALE DATE rEVISICN I BY I D. Axlell ----------------------- I? DEDan C Auslmd DESIGNER O?:OM l??'L D. L}4 06VdS 12-311JG ItOREGON DEPARTMENT OF TRANSPORTATION BRIDGE ENGINEERING SECTION OBEC Consulting Engineers BRIDGE NO. 17970 - FANNO CREEK BRIDGE DATE CALL. BOOK SUPERSTRUCTURE DETAILS 244 OMKMY CUM WAD Fm(A.f)56.}d576 0XGC C E00H 97401 U(503)ml-090 SHEET 4_ OF 8_ DRAWING NO. File Az . ro h °o m ti 0 ti 0 oh, a 0 20' 4' 100' 0"Clr.-Clr. Bents _20'4' EndPcne/ End Panel 15 =0', Typ, Sid 20' 4'Sridge ?Im?( End Ponel, Co. End Cp0 sr i, Cy4 ??? See Dwg. No. 4J422 000°O t A ------------------------ -L,-- rocs o'c? I - _i S W. DWHAMROAD _ Z "Lines -_ N 57100 '02' W 13960 'El. 138.05 I;-------r F - --V ra I r -r ----------- I 1^ I I IV 0 0 °o CC> ° Exlg. Bridge I ?? c O o? { 'Elevations Shown Are Finish N Grade Top Of ACWS o 0 1150 140 O ? '130 2 ;120 o ://O m 100 W 190 80 -1 / Pedestrian Rail On Type F" Z Concrele Bridge Rail See Q Dwg No. 47168 HYDRAULIC DATA DESIGN FLOOD BASE FLOOD ROADWAY OVERTOPPING Dischorge-cts 4200 4200 Frequent -Yeors 100 100 II.W.Elevotion FI. Not. Chvrnl 128.3 128.3 - c 300' VC. Propose Structure ?. o? ?W GRADELINE DIAGRAM NO SCALE ADVANCE PLANS PLAN NOT FOR CONSTRUCTION OSEC CONSULTING ENGINEERS DATA 7' 0"Clr-Clr Bents , Closs 700 /?;prop sr sr - MH. SAN - ---- N _N5758'J1:W i -2.517% A ?,__ ?• End Panel 16 Yr Flood Min Tip E! 75.00 Exlg Ground El. 128.3 Min Tip El. 75.00 ea 19'L Est. Tip El. 5800 Esl. Tip El. 5800 ELEVATION I•=20' DATE I REVISICN I BY I MN Sweeper ---- I MWna--------- --------- I I? O[criz ------- --------------- - A^romc D. Cme DESK" DESIGNER ? rao I ! oh 1)." IMAM- _ 12.3196 _ GENERAL NOTES Alkonita i Rd. -~ 4 a 00 o ? o^ ti c rhom Rd el? PROJECT ( ( I \oy v h? SEC-12, T.2S,, RAW., W.M. LOCATION MAP NO SCALE All molericl and workmanship shall conform to the Slondord Specifications for Highway Construction, 1991 Edition, of the Oregon Department of Transportation and the special provisions Bridge designed for H525 loading with an allowance for present wearing surface and 25 psf for future weorfng surface in accordance with the current Slandord Specifications for Highwoy Bridges' of the American Association of Slate Highwoy and Transportation Officials (AASHT0) Concrete members designed by Lood Faclor Design Melhod. Seismic design is in accordance with AASHTO Division I-A Seismic Design criteria for seismic performance category A, A=029. All reinforcing steel except prestressing strand shall conform to the requirements of ASTM A6I5 CGrode 60, or A706. The following splice lengths shall be used unless shown otherwise, Bar Size 3 4 5 6 7 8 9 /0 /1 Splice Length (Uncoated) /'-0' 1'-4" 1-8" 2'-0" 2=9" 3=7" 4'-7' 5=9" 7=l" Slice Len lh Coaled 1'-5- 1' !1" 2'4-1 2'10' J-101 5'0 " 6=5" 8-1 " 9=11 Epoxy splice length All bars shall be placed 2"clear of the nearest face of concrete unless noted or shown otherwise. Concrete in precast prestressed beams shall be Class 7000 - >. The minimum concrete strength al transfer of prestress shall be 6400 psi, All other concrete shall be Class 3300 11 or Prestressing strand shall be as tolled for on the deloil drawings. All piling shall be PP 1275 x 025 steel pipe conforming to ASTM specification A252 Geode 2. (Fy=J5 ksi) Piling shall be driven close-ended loan ultimate bearing copocity of 360 kips per plie. Pile driving crilerio will be delermined by Gales Equclion Anulysis wilh an applied solely factor o1 .0, OBEC Consulting Engineers 244 CCL14M Eun Ra+o F-(sam?4 (0 EUOEW-oREGW97401 U45W)553-a XM3 BRIDGE N0. SHEET OREGON DEPARTMENT OF TRANSPORTATION 17970 FANNO CREEK (DURHAM ROAD) BRIDGE ItF . BRIDGE ENGINEERING SECTION DATE HALL BOULEVARD-UPPER BOOJES FERRY ROAD SECTION WASHINGTON COUNTY -----__-' DRAWING NO. ic--oD9YD,m 43422, 43495,47I68---------------- CAIC. BOOK PLAN & ELEVATION _ - fQtA?111Dr/+r Mnw SIMI WI YNQLc1 HlA[A -------------------- '---• - ---- _.--- REGION to OTEGa4 DIvaioi 10157. JOINT a PERMIT APPLICATION FORM ° US Army Corps THIS APPLICATION WILL MEET THE REQUIREMENTS OF BOTH AGENCIES of Engineers = 1859 Portland District Corps Action ID Number Oregon Division of State Lands Number SEND ONE SIGNED COPY OF YOUR APPLICATION TO EACH AGENCY District Engineer State of Oregon ATTN: CENPP-PE-RP Division of State Lands P.O. Box 2946 775 Summer Street NE Portland, OR 97208-2946 Salem, OR 97310 503/326-7730 503/378-3805 Q Applicant Name Oregon Department of business # (503)986-3782 Transportation home phone # ATTN. Alan Lively FAX # (503)986-3749 and Address Room 200, Roadway Engineering Section Salem, OR 97310 business phone # (503) 626-0455 O Co-Applicant home phone # x7266 Q Authorized Agent W&H Pacific Inc. FAX # (503) 526-0775 ATTN: Jim Evans O Contractor 8405 SW Nimbus Ave. Name and Address Beaverton, OR 97008-7120 Property Owner Oregon Dept. Of Transportation business phone # (503) 986-3782 (if different than applicant) ATTN:Alan Lively home phone # Name and Address Room 20, Roadway Engineering FAX # (503) 986-3749 Section Salem, OR 97310 PROJECT LOCATION location Road or other descri tive' Street Legal Descri do p -. , Durham Road Quarter Section Township Range (SW Hall Blvd. To SW Upper Boones Ferry Rd. NW 13 T2S R 1 W In or Near (City or Town) County Tax Map # Tax Lot # Tigard Washington 2S 1W 13 AB 800 2S 1W 13 BA 100,400 Waterway River Mile Latitude Longitude Fanno Creek 1 45° 22'N 122° 45'W Is consent to enter property granted to the Corps and the Division of State Lands? Q Yes 0 No JOINT of ° PERMIT APPLICATION FORM ?- ° US Army Corps THIS APPLICATION WILL MEET TFIE REOUIREMENTS OF BOTH AGENCIES of Engineers = a s 9 Portland District ,. MM Corps Action ID Number Oregon Division of State Lands Number SEND ONE SIGNED COPY OF YOUR APPLICATION TO EACH AGENCY District Engineer State of Oregon ATTN: CENPP-PE-RP Division of State Lands P.O. Box 2946 775 Summer Street NE Portland, OR 97208-2946 Salem, OR 97310 503/326-7730 503/378-3805 Q Applicant Name Washington County Department business # (503) 693-4461 of Land Use and Transportation home phone # and Address ATTN: Bill Ihly FAX # (503) 693-4805 155 N. First Avenue, Suite 350 Hillsboro, OR 97124 business phone # (503) 626-0455 O Co-Applicant home phone # x7266 Q Authorized Agent W&H Pacific Inc. FAX # (503) 526-0775 ATTN: Jim Evans O Contractor 8405 SW Nimbus Ave. Name and Address Beaverton, OR 97008- 7120 Property Owner Oregon Dept. Of Transportation business phone # (503) 986-3658 (if different than applicant) ATTN: Matt Caswell home phone # Name and Address Room 417 Transportation FAX # (503) 986-3625 Building Salem, OR 97310 PROJECT LOCATION tive location Road or other descri Street Legal Description p , Durham Road Quarter Section Township Range (SW Hall Blvd. To SW Upper Boones Ferry Rd.) NW 13 T2S R1VV In or Near (City or Town) County Tax Map # Tax Lot #, Tigard Washington 2S 1W 13 AB 800 2S 1W 13 BA 100,400 Waterway River Mile Latitude Longitude Fanno Creek 1 45° 22W 122° 45'W Is consent to enter property granted to the Corps and the Division of State Lands? Cx) Yes 0 No O P4 SED PROJECT INFORMATION • is Activity Type: Q Fill O Excavation (removal) O In-Water Structure O Maintain/Repair on Existing Structure Brief Description: Replace existing bridge Place riprap to protect bridge abutment Fill vJll involve cubic yards annually and/or 402 cubic yards for the total project 402 cubic yards in a wetland or below the ordinary high water or high tide line Fill will be Q Riprap O Rock O Gravel O Sand O Silt O Clay O Organics O Other Fill Impact Area is 0.08 Acres; varies length; varies width; 3 R. depth Removal will involve cubic yards annually and/or; 402 cubic yards for the total project 402 cubic yards below the ordinary high water or high tide line Removal will be O Riprap O Rock O Gravel O Sand 0 Silt © Clay O Organics O Other Removal Impact Area is 0.08 Acres: varies length; varies width; 3 R. depth Estimated Start Date July. 1996 Estimated Completion Date September 30. 1996 Will any material, construction debris, runoff, etc. enter a wetland or waterway? © Yes O No If yes, describe the type of discharge and show the discharge location on the site plan. ) PROPOSED PROJECT PURPOSE & DESCRIPTION Project Purpose and Need: The project is intended to relieve traffic congestion and improve traffic safety on Durham Road, an important arterial connecting Interstate 5 with Highway 99W. Project Description: The project will widen a two-lane road with inadequate shoulders, and replace a narrow five-span, wood-piling supported bridge with a modern road with two 12'travellanes, a 14' center turn lane, 5' bike lanes and 6.5' sidewalks. The proposed bridge will be a clear span with abutment in the same location as existing. The area around the abutment will be protected with Class 700 riprap, which will extend 3' below OHW (120'). An area of about 4,000 square feet of stream bank downstream from the bridge will be graded down to OHW to mitigate the floodplain impacts of the new embankment. How many project drawing sheets are included with this application? NOTE: A complete application must include drawings and a location map submitted on separate 8'/2 X 11 sheets. i's - PWCT IMPACTS AND ALTERNATIVES Describe alternative sites and project designs that were considered to avoid impacts to the waterway or wetland. A design with no fill below the elevation of OHW (120' was considered; however, it was found to be necessary to extend the riprap 3' below OHW to protect adequately the abutment from scour by the creek. Describe what measures you will use (before and after construction) to minimize impacts to the waterway or wetland. 1. /n-water-work will be performed only during period set out by ODFW (July 1 - Sept. 30). 2. No concrete or asphalt will come into contact with the active flowing stream. 3. Only clean, durable rock shall be used for riprap. 4. No petroleum products, chemicals or other deleterious materials shall enter the water. 5. Removal of existing woody vegetation will be minimized, and limited to construction and access areas. 6. All disturbed streambank and tloodplain areas will be seeded with grass and planted with native shrubs and trees to prevent erosion and restore the area. 7. Riprep shall be placed using land-based equipment NOTE: If necessary, use additional sheets. U ADDITIONAL INFORMATION Adjoining Property Owners and Their Addresses and Phone Numbers Duncan, John & Janice 16055 SW 74th Avenue, Tigard, OR 97223 Johnson, Cart 200 James Street, #407, Edmonds, WA 98020 H,ambach, Harold & Mildred 7735 SW Durham Road, Tigard, OR 97224 Has the proposed activity or any related activity received the attention of the Corps of Engineers or the State of Oregon in the past, e.g., wetland delineation, violation, permit, lease request, etc.? O YES Q NO If yes, what identification number(s) were assigned by the respective agencies: Corps # State of Oregon # 0 TY UNTY PLANNING DEPARTMENT AFFIDAVIT • • W(tdWcompleted by local planning official) O This project is not regulated by the local comprehensive plan and zoning ordinance. O This project has been reviewed and is consistent with the local comprehensive plan and zoning ordinance. O This project has been reviewed and is not consistent with the local comprehensive plan and zoning ordinance. O Consistency of this project with the local planning ordinance cannot be determined until the following local approval(s) are obtained: O Conditional Use Approval O Development Permit O Plan Amendment O Zone Change O Other An app!ication O has O has not been made for local approvals checked above. Signature (of local planning official) Title City / County Date ® COASTAL ZONE CERTIFICATION If the proposed activity described in your permit application is within the Oregon coastal zone, the following certification is required before your application can be processed. A public notice will be issued with the certification statement which will be forwarded to the Oregon Department of Land Conservation and Development (DLCD) for its concurrence or objection. For additional information on the Oregon Coastal Zone Management Program, contact the department at 1175 Court Street NE, Salem, Oregon 97310 or call 503-373-0050. CERTIFICATION STATEMENT I certify that, to the best of my knowledge and belief, the proposed activity described in this application complies with the approved Oregon Coastal Zone Management Program and will be completed in a manner consistent with the program. Printri-ype Name Title ADD!icant Signature Date O SIGNATURE FOR JOINT APPLICATION (REQUIRED) App!ication is hereby made for the activities described herein. I certify that I am familiar with the information contained in the application, and, to the bast of my kncv:lcdge and belief, this information is true, complete, and accurate. I further certify that I possess the authority including the necessary requisite property interests to undertake the proposed activities. I understand that the granting of other permits by local, county, state or federal agencies does not release me from the requirement of obtaining the permits requested before commencing the project. I understand that local permits may be required before the state removal-fill permit is issued. I understand that payment of the required state processing fee does not guarantee permit issuance. Prin}rype Name (coapplicant) Title Applicant Signature (coapplicant) Date I certify that I may act as the duly authorized agent of the applicant. PrinVType Name Title Authorized Agent Signature Date ^ ?P*NTAL WETLAND IMPACT INFORMATION` • • (FOR WETLAND FILLS ONLY) Site Conditions of Impact Area Impact area is 0 Ocean 0 Estuary 0 River 0 Lake &Stream 0 Freshwater Wetland Note: Estuarian Resource Replacement is required by state law for projects involving intertidal or tidal marsh alterations. A separate Wetlands Resource Compensation Plan may be appended to the application. Has a wetland delineation been completed for this site? Q Yes 0 No If yes by whom: SRI/Shapiro Describe the existing Physical and biological character of the wetlandfwaterway site by area and type of resource (use separate sheets and photos, if necessary) Fanno Creek is an important perennial stream draining the eastern Washington County urbanizing area. It flows into the Tualatin River about a mile below the project. The creek has a mean annual flow of 64 c.f.s. in the project area. Flow and water quality vary widely depending on rainfall events due to the urbanized nature of the watershed. The stream is deeply incised, with a narrow but fairly undisturbed riparian zone including the following species: Oregon ash, red alder, big-leaf maple, western wahoo, and hazelnut. Himalayan blackberry and reed canarygrass dominate a more disturbed area. Wildlife use includes ducks and songbirds. Such riparian zones typically function as a mitigation corridor for mammals such as raccoon and opossum, which are adapted to an urbanizing environment. There are no wetlands in the project area. Wetlands have been identified beyond the project boundaries (see attached sheet). Resource Replacement Mitigation Describe measures to be taken to replace unavoidably impacled wetland resources Removal of woody vegetation will be minimized within 60' of OHIV. Where complete removal is unnecessary, e.g. for construction access, above-ground portions of trees and shrubs will be trimmed off so as to allow natural regeneration. The creek bank grading area and other disturbed areas outside the toe of the riprap will be seeded with grasses and planted with native shrubs and trees. The immediate creek bank zone will be planted with willow and dogwood. The remaining area will be planted with Douglas spiraea, vine maple, salmonberry, oregon ash and bigleaf maple. • • • • • Hydraulic Analysis For: Durham Road Bridge Crossing of Fanno Creek Prepared for: Washington County Department of Land Use and Transportation 155 North First Avenue, Suite 350 Hillsboro, Oregon 97124 Prepared by: W&H Pacific, Inc. 8405 SW Nimbus Avenue Beaverton, Oregon 97008 April 4, 1995 00 Purpose • • The Durham Road Project includes construction of a new bridge crossing at Fanno Creek. The proposed structure is a simple 100 foot clear span over the existing channel. No constriction to the flow is proposed since abutment locations will not change. A hydraulics report is required to evaluate the impacts of the proposal. This report will document compliance with the City of Tigard's "no-rise" floodplain criterion. Specifically, it addresses chapter 18.84.040, Approval Standards of the City's Sensitive Lands ordinance. These standards require that developments within the floodplain shall not increase the water surface (subsections A 1 and 3). Methodology This analysis used the Federal Emergency Management Agency's (FEMA) standards for a "no-rise" determination. This involves preparation of three hydraulic models to demonstrate the following: Verification - this model will duplicate the effective Flood Insurance Study (FIS) model. Existing conditions - the verification model modified to reflect conditions prior to the project. Proposed conditions - the existing conditions model revised to reflect the completed project. Computer modeling was performed using the HEC-2 (v4.6.2, Haestad Methods Implementation 6.52) computer program. This program was developed by the Corps of Engineers (COE) Hydraulic Engineering Center (IBC) in Davis, California. The following sections describe the application of this methodology and results. Verification The model for the effective FIS was obtained in digital form from the Corps of Engineers Portland, Oregon office. It is dated June 1980 with a revision in October 1983. The entire model (sections 0.020 tlirough section 13.064) was run for this analysis. Figure 1 is a Vicinity Map showing the project location. Figure 2 is a portion of the effective FIS map wluch shows the Durham Road crossing ofFanno Creek. Table 1, Fanno Creek Model Comparisons, tabulates the FIS values and the results of the verification run. The results show excellent correlation between the published values and the model obtained from the Corps. A floppy disk is provided which contains all the models used in this analysis. The verification run is titled FNO_DUP.HC2. • • Existing Conditions • • A review of the effective FIS model raised concerns regarding the bridge section used. Figure 3, Cross Sections, compares the effective section with actual survey data. It can be seen that the surveyed section contains significantly less area than the effective FIS section. The effective FIS model, then, was revised to reflect existing conditions. The revisions are listed below: Revisions to Effective FIS to Reflect Existing Conditions. • Archival records were changed to indicate that the model was revised by W&H Pacific. • Section number 1.43 was changed to section number 1.431. • GR cards at section 1.431 were changed to reflect surveyed geometry. • X1 card at section 1.431 was changed to reflect the revised GR data. These changes included left and right bank station offsets. The vertical adjustment factor was deleted. • NH card was revised for section 1.431 to match the new GR data. Roughness coefficients were not changed. • Section number 1.44 was changed to section number 1.441. • NH card for section 1.441 was changed to reflect the GR data entered at section 1.431. • BT stations for section 1.441 were revised to match the GR data. • SB card for section 1.441 was revised as follows: bottom width (BWC) was changed to 26.85 from 20; open area (BAREA) was changed to 727 from 830; side slopes (SS) were changed to 2.0 from 2.09; and, the inverts (ELCHU and ELCHD) was changed to 116.9 from 1115.0. • The vertical adjustment factor at section 1.441 was deleted. • The low chord elevation (ELLC) of the bridge was changed on the X2 card to 130.4 from 130.7. Table 1 provides a summary of results for the existing conditions model. The summary shows the water surface is higher than the effective FIS model. This effect extends for approximately 1.9 miles upstream. A copy of the existing conditions model is provided on the disk enclosed as FNO XTG.HC2. Proposed Conditions The Durham Road Project will, among other things, replace the bridge which currently crosses Fanno Creek. The existing bridge is a five span structure with four piers in the floodplain. The proposed bridge will be a clear span with abutments at the same location. The new bridge will be signiricantly higher to improve vertical roadway alignment. The Durham Road Project also widens the existing roadway surface. Figure 4, Proposed Bridge Crossing at Fanno Creek, is a topographic survey showing existing and proposed conditions. The City of Tigard's Sensitive Lands Ordinance requires mitigation of fill plated within the floodplain (18.84.040A1). Portions of this fill are mitigated by cutting overbank areas under the bridge. Figure 3, Cross Sections, provides a section showing proposed conditions. 2 AlI Aft I 5027 So 197 I PSI Rr W i O i ` O J a i Vicinity Map W r Ro 20 o r \?- s P ?;'26?. ?? : mil? c o-' `• `- :•. cJr \ ?? `'' ! w ." • B ' 1 ' foil : r-^` _ - .41j 'r \ • - Vill _ssoi?cr..? ?_o t 7-7 5 so29 T'A le s' IM /M cx?$ ?•`: lJ.lr .;?._..:.---- -;'-al.•'. '? c'_•_ p 1 :IW s- tz goo I o,o? 20q, ?j ?- - - - ' ' m .-2 s -^?•? .-, o u .° 50 < ?; 7? • X 1. III . ` in ^J - 'tJUt'?iYf. M-v't: ? h !. /'? '`R0i1D? ° I• I I / 1 I ??• w .{Igard 1 I / . I ?? I N. ? C? I a o I ?'/. \ n. u:- 'Grp 1•L.? RiL'n of JII. ? ??'I ??r"? rham- Mlle 1 a r _?--,°, ? ,.• =• f i?FJ Il ??? ? •`'?? ' F : y : _ r. TU fA :i T IN .1 ?.?I I( ` 1 ? ? \+x?? as fro- .• • ? :?j :I ` i ?%: ai ' ? 1 y 1 ` II f 6d O• : . ?nona• r5- ? ??_II,Ffr®? Cem!6: ?.d.•?? C 121-6-Y h jblit .. ,. fl??/?` 2 j ? a AClFIC ?, ? C ?J ilk, ?/` ?• Or? /? `? I • ? :::" °o DATC i BY i REvIS10N ? CHK I I 1 F I igure ORAwrJ BY; PACIFIC CHECKED BY: ••,° ?? ,,,?„?• ,•_„ APPROVED BY: ?y? u•?r 1 Mr-'++? SCALE: PROJECT NO. I :l:E NAUE: ?'?r SECTION, TOWNSHIP. RANGE: LAST EDIT: ?1 I J I ??.,\ I r ;.' i?l !f I \??i I Q r I '?.. I I n F? P1 OZLCL / • 1-???: -? '-.fit-=?^?t` ? ? -1 \; ?.?-; .. - -, LC-; ;' ` '-r_?Y. 1? ?•y` ? 'I°-----____? t 1 c 1 ,v -1??( ;':'., P`= ? ?1.-. 7/^y11?1? I 30 II A .., ,' (-. i i % i ? l ? 1 I % •1,r? 1. ,i?"•J ; - 1 \•. t` .? I'. i ? \ l- '" '?00 -- ' l \ ` V,1 M x (0 L o m \ l I I --h I x o I \. 1• V/ ' j I I? l l `I I n ...1 I I • I I SIV" i co ?1 I -. -17 -? ure 4 Fi DRAWN BY: g Proposed Bridge Crossing ; -P A C I F I C CHECKED BY: At Fanno Creek 8405 S.W. Nimbus Avenue BEAVERTON, OR 97008-7120 APPROVED BY: A? - - 11 1 PROJECT. NO: FILE NAtJ^ -: - Fhone: iJUJ) 626w-0455 `''. Fax: '(SOJ) 5"L6-0775. --20 PI aning • Engineering Surveying landscape Architecture • Environmental Services PLOT DATE: I I 1\ 00 * W The-existing conditions model, then, made several revisions to reflect actual conditions. A summary of these changes follows. • Archival records were changed to indicate that the model was revised by W&H Pacific. • Section number 1.43 was changed to section number 1.431. • GR cards at section 1.431 were changed to reflect surveyed geometry. • X1 card at section 1.431 was changed to reflect the revised GR data. These changes included left and right bank station offsets. The vertical adjustment factor was deleted. • NH card was revised for section 1.431 to match the new GR data. Roughness coefficients were not changed. • Section number 1.44 was changed to section number 1.441. • NH card for section 1.441 was changed to reflect the GR data entered at section 1.431. • BT stations for section 1.441 were revised to match the GR data. • SB card for section 1.441 was revised as follows: bottom width (BWC) was changed to 26.85 from 20; open area (BARER) was changed to 727 from 830; side slopes (SS) were changed to 2.0 from 2.09; and, the inverts (ELCHU and ELCHD) was changed to 116.9 from 115.0. • The vertical adjustment factor at section 1.441 was deleted. • The low chord elevation (ELLC) of the bridge was changed on the X2 card to 130.4 from 130.7. Table 1 provides a summary of results for the existing conditions model. The summary shows the water surface is higher than the effective FIS model. This effect extends for approximately 1.9 miles upstream. A copy of the existing conditions model is provided on the disk enclosed as FNO_XTG.HC2. Proposed Conditions The Durham Road Project will, among other things, replace the bridge which currently crosses Fanno Creek. The existing bridge is a five span structure with four piers in the floodplain. The proposed bridge Neill be a clear span with abutments at the same location. The new bridge will also be significantly higher to Lnprove vertical roadway alignment. The Durham Road Project also widens the existing roadway surface. Figure 4, Proposed Bridge Crossing at Fanno Creek, is a topographic survey showing existing and proposed conditions. The City of Tigard's Sensitive Lands Ordinance requires mitigation of fill placed within the floodplain (18.84.040A1). Portions of this fill are mitigated by cutting overbank areas under the bridge. Figure 3, Cross Sections, provides a section showing proposed conditions. The proposed conditions model changes the existing conditions model to reflect the project. The primary changes involved revising the bridge opening to reflect the new construction. Specific changes are as follows: • Archival records were changed to indicate that the model was revised by W&H Pacific. • X1 for section 1.431 was revised to indicate a shorter reach length downstream. Bank stations were also changed on this card to reflect the new GR data set. • GR cards for section 1.431 acre revised to reflect the proposed opening configuration. • X1 for section 1.441 was revised to indicate the new longer reach length. • NH cards for both 1.431 and 1.441 wcre revised to reflect the revised GR stations. `N' values were also lowered on section 1.441 to 0.06 from 0.075 in the overbank area. This was done to reflect thr- 2 Table 1 Fanno Creek Model Comparisons Verification Existing Conditions Proposed Conditions Cross FIS W&HP Difference W&HP Difference W&HP Difference Difference Section Distance Values Verification From FIS Ext . Co d. From Verification Pro 'd. From Ext . From Verification A 1.11 123.7 123.71 0.01 123.71 0.00 123.71 0.00 0.00 B 1.44 128.3 128.32 0.02 128.77 0.45 128.51 -0.26 0.19 C 1.53 130.0 130.01 0.01 130.94 0.93 130.23 -0.71 0.22 D 2.41 133.8 133.76 -0.04 133.88 0.12 133.78 -0.10 0.02 E 2.69 136.9 136.88 -0.02 136.92 0.04 136.88 -0.04 0.00 F 2.80 137.7 137.72 0.02 137.76 0.04 137.73 -0.03 0.01 G 3.34 140.0 139.99 -0.01 140.00 0.01 139.99 -0.01 0.00 H 3.68 141.1 141.05 -0.05 141.05 0.00 141.05 0.00 0.00 1 3.86 141.9 141.85 -0.05 141.85 0.00 141.u5 0.00 0.00 J 4.16 145.9 145.90 0.00 145.90 0.00 145.90 0.00 0.00 K 4.50 146.8 146.78 -0.02 146.78 0.00 146.78 0.00 0.00 L 4.73 148.0 148.00 0.00 148.00 0.00 148.00 0.00 0.00 NOTE: 1) A negative difference indicates a fall in WSE. A positive difference indicates a rise in the WSE. 2) Durham Road bridge lies between stations 1.43 and 1.44 • 0 c ?: SECTION, TOWNSHIP, RANGE: CD D A L E E,kF?c rb ? ` 3 o = i lD ?'??Y 1N3?? 'T' ti rn OQ m ? C7 c Z _ ?? r- rD C C7.) ° _. m cc = Y v -? 0 C 3 00 0 caa Cn C" CO IV M m -a -V ? y ? -n T M y m Z *--4 -3 O O ?® D r' y 'n' O O ?, ? o v v X O ?-3 -? C ..n O -n C:) Ec p 't7 z Z 0 1 z m 0 a -i ° 0 C z a r > r O O o i 0 A X ° ? I ? J I D ? f( N C I m ? ~I' N a c? D m m "S7 C I I A o ? n I M I N DRAWN BY: Figure 2 M P"ACIFIC CHECKED BY: Effective Flood Insurance Study 84405 S.W. Nimbus Avenue BEAVERTON, OR 97008-7120 APPROVED BY: SCALE: PROJECT NO. FILE NAME: Phone: (503) 626-0455 Fax: (503) 526-0775 ' Planning • Engineering • Surveying - -- landscape Architecture- • Environmantal -SerriCBa G, LAST EDIT: PLOT DATE: Appendix QV??GY M ^ Nf Federal Emergency Management Agency i Washington, D.C. 20M o ICJ o CERTIFICATION OF A "NO-RISE" DETERMINATION FOR A PROPOSED FLOODWAY DEVELOPMENT City of Tigard Bridge Reconstruction Community Name Development Name Durham Road @ Fanno Creek Lot/Property Designation City of Tigard Property Owner I hereby certify that the proposed remedial measures, in combination with the property development designated above, will result in no loss of flow conveyance during the occurrence of the 1 percent annual chance of exceedence (100-year flood) discharge. I further certify that the data submitted herewith in support of this request are accurate to the best of my knowledge, that the- analyses have been performed correctly and in accordance with sound engineering practice, and that the proposed structural works are designed in accordance with sound engineering practice. 4 Date Registered Professional Engineer VD PROFF GINF?? 14.481 9 Seal OREGON y25, C PO Expira ion Date 12-31-96 Date: 12RAR95 Run Time: 18:14:12 HMVersion: 6.52 Data File: fno dup.hc2 Page 1 THIS RUN EXECUTED 12MAR95 18:14:12 ?wwfw#RwrR###R14RRf#tt#tRR#rRRrrfR C-2 HATER SURFACE PROFILES rsion 4.6.2; May 1991 rrrwRRR#rRRRrRRR rrwttr####RrrrrrtR S IS AN ARCHIVAL RUN ALL DATA AND RESULTS ARE SAVED ON UNIT 9,6 HEC-2 PC FILE NAME : FANNC83C.DAT INPUT TAPE 400 FILENAME: FANNIC3T HYDSEC TAPE 531 FILENAME 1111 : ICFANN03 .#RRR.. FANNO CREEK R.M. 0 - 13.1 10-, 50-, 100-, AND 500-YEAR FLOODS DURHAM, TIGARD, BEAVERTON AND WASHINGTON COUNTY, OREGON FLOOD INSURANCE STUDY JUNE 1980 REVISED OCTOBER 1983 RRrk#R# STUDY REACH CONFLUENCE WITH TUALATIN R TO U/S OF SCHOLLS FERRY ROAD RRRRRRt tRR###t .. •• W8H PACIFIC VERIFICATION RUN - MARCH 1995 tRkRRrf f #wRRI# CROSS SECTIONS: CHANNEL BY OLSON ENGINEERING, VANCOUVER, WA OVERBANK (PHOTOGRAMMETRIC) BY SPENCER B. GROSS, BEAVERTON TOPOGRAPHY : CITY OF TIGARD TOPO, 1974; CITY OF BEAVERTON TOPO, 1971 SAPS USED : WASHINGTON CO. FIS WORK MAPS 78, 79, 80, 81, 104, 105, 106 AERIAL PHOTOGRAPHY DATED 9 MAY 1977 BY WAC CORP, EUGENE, OR ORTHOPHOTO BASE BY DAVID C. SMITH, PORTLAND, OR FIELD SURVEYS BY USCE, PORTLAND DISTRICT . ADDITIONAL FIELD CONTROL BY SPAN INTERNATIONAL, PHOENIX, AZ ADDITIONAL HORIZONTAL CONTROL BY SPENCER GROSS, BEAVERTON DISCHARGES START METHOD NORMAL DEPTH, SLOPE = 0.002462 t#RR## US ARMY ENGINEER DISTRICT, PORTLAND, OREGON ENGINEERING DIV, PLANNING BRANCH, HYDROLOGY SECT GEORGE HOLMES, CHIEF, HYDROLOGY SECT. KEN SOOERLIND, STUDY MANAGER ENC. R#rrrtk HYDRAULICS BY NORMAN ASSOCIATES FANNO CREEK, RM 0.02 TO RM 13.06 10 YEAR FLOOD FANNO CREEK 1CHECK INC NINV IDIR STRT METRIC HVINS Q WSEL FD -1 2 0.002462 118.0 EFFECTIVE FIS MODEL -in Date: 12 AR95 Run Time: 18:14:12 HMVersion: 6.52 Data File: fno dup.hc2 • Page 3 1.05 1.5 2.6 0 22.0 20 1154 3.49 110.0 110.0 1.11 0 0 0 40 40 40 0 0.1 0 0 1 127.9 130.0 4 155 132.0 132.0 195 131.8 128.0 420. 130.0 126.2 421 130.0 130.0 0.100 0.095 0.050 1.14 18 185 240 120 140 130 130.0 0 124.0 50 122.0 95 120.0 130 116.0 185 114.0 210 112.3 216 112.1 219 110.3 224 114.0 225 118.0 230 120.0 240 122.0 280 124.0 385 128.0 385 128.0 425 130.0 450 140.0 500 0.090 0.110 0.055 1.32 21 60 122 410 960 960 134.0 0 132.0 50 130.0 60 120.0 65 118.0 70 115.3 74 115.2 80 114.7 83 114.6 87 114.2 91 113.1 96 113.1 99 118.0 110 120.0 122 122.0 130 124.0 225 126.0 252 128.0 280 130.0 300 132.0 313 134.0 332 0.095 0.100 0.055 1.40 18 175 250 420 310 400 134.0 0 130.0 25 126.0 60 124.0 175 120.0 195 116.1: 203 116.4 209 115.9 212 115.8 216 115.4 220 114.3 225 114.3 228 120.0 230 132.0 250 134.0 280 136.0 310 138.0 380 140.0 425 0.3 0.5 4 0.075 835 0.050 876 0.085 1000 0.060 1044 1.43 26 835 876 200 230 200 0 -0.2 140.3 185 140.6 300 140.1 400 139.7 456 138.8 500 135.0 560 134.4 590 132.2 605 130.7 615 130.7 720 130.7 810 121.3 810 120.3 835 117.3 843 117.2 849 116.7 852 116.6 856 116.2 860 115.1 865 115.0 870 117.2 874 122.0 876 130.7 906 134.0 950 138.0 1000 140.0 1044 4 0.075 835 0.050 876 0.110 111,30 0.060 1044 1.10 1.5 2.35 0 20 4 830 2.09 115.0 115.0 1.44 0 0 0 40 40 40 0 0.2 0 0 1 130.7 132.2 8 605 132.2 132.2 615 132.2 130.7 720 132.2 130.7 810 132.2 130.7 811 132.2 130.7 905 132.2 130.7 906 132.2 130.7 950 134.0 134.0 0.080 0.100 0.052 0.3 0.5 1.47 19 262 300 150 170 200 140.0 0 138.0 10 136.0 45 134.0 60 130.0 85 130.0 150 126.8 155 124.0 230 122.0 262 120.0 268 117.5 273 117.4 279 116.9 282 116.8 286 116.4 290 115.3 295 120.0 300 130.0 350 140.0 447 EFFECTIVE FIS MODEL Run Date: 12Y.AR95 Run Time: 18:14:12 HMVersion: 6.52 Data file: frb_dup.hc2 Page 26 SECNO XLCH ELTRD ELLC ELM1N Q CWSEL CRIl1S EC 10*KS VCH AREA .01K 320 1 00 960 0.00 0.00 113.10 2923.00 124.88 0.00 125.29 25.45 5.33 718.35 579.45 . 320 1 . 00 950 0.00 0.00 113.10 3809.00 125.94 0.00 126.40 26.81 5.85 909.96 735.59 . 320 1 . 00 960 0.00 0.00 113.10 4193.00 126.33 0.00 126.82 27.41 6.05 986.21 800.95 . 1.320 . 960.00 0.00 0.00 113.10 5093.00 127.17 0.00 127.71 28.77 6.49 1153.71 949.45 400 1 400 00 0.00 0.00 114.30 2923.00 126.11 0.00 126.66 43.49 6.09 584.15 443.23 . 400 1 . 400 00 0.00 0.00 114.30 3809.00 127.18 0.00 127.73 41.19 6.41 784.87 593.49 . 400 1 . 400 00 0.00 0.00 114.30 4193.00 127.59 0.00 128.17 40.52 6.53 864.37 658.71 . 1.400 . 400.00 0.00 0.00 114.30 5093.00 128.46 0.00 129.06 39.45 6.79 1038.25 810.83 430 1 200 00 0.00 0.00 114.80 2923.00 126.79 0.00 127.27 21.05 5.93 610.46 637.11 . 430 1 . 200 00 0.00 0.00 114.80 3809.00 127.79 0.00 128.42 25.18 6.91 694.89 759.15 . 430 1 . 200.00 0.00 0.00 114.80 4193.00 128.18 0.00 128.89 26.76 7.29 729.48 810.48 . 1.430 200.00 0.00 0.00 114.80 5093.00 129.01 0.00 129.88 30.43 8.15 803.85 923.24 460 1 40 00 132.20 130.70 115.00 2923.00 126.88 0.00 127.37 22.17 6.04 600.92 620.76 . 440 1 . 40 00 132.20 130.70 115.00 3809.00 127.91 0.00 128.56 26.20 7.01 687.96 744.16 . 1.440 . 40.00 132.20 130.70 115.00 4193.00 128.32 0.00 129.05 27.73 7.39 723.80 796.27 1.440 40.00 132.20 130.70 115.00 5093.00 129.19 0.00 130.08 31.21 8.24 801.54 911.61 470 1 200.00 0.00 0.00 115.30 2923.00 127.42 0.00 127.83 22.78 5.86 796.28 612.45 . 470 1 200.00 0.00 0.00 115.30 3809.00 128.67 0.00 129.08 20.99 6.11 1030.72 831.42 . 470 1 200.00 0.00 0.00 115.30 4193.00 129.18 0.00 129.58 20.31 6.19 1128.D4 930.43 . 1.470 200.00 0.00 0.00 115.30 5093.00 130.27 0.00 130.68 19.02 6.37 1361.27 1167.77 1.530 490.00 0.00 0.00 115.70 2913.00 128.35 0.00 128.60 13.32 5.01 1258.49 798.05 530 1 490.00 0.00 0.00 115.70 3792.00 129.53 0.00 129.76 11.78 5.09 1661.66 1104.83 . 530 1 490.00 0.00 0.00 115.70 4174.00 130.01 0.00 130.24 11.27 5.12 1829.79 1243.18 . 1.530 490.00 0.00 0.00 115.70 5069.00 131.05 0.00 131.27 10.16 5.16 2212.71 1590.25 2.000 2400.00 0.00 0.00 117.60 2913.00 130.41 0.00 130.55 5.98 3.80 1957.15 1191.68 000 2 2400.00 0.00 0.00 117.60 3792.00 131.40 0.00 131.53 5.63 3.92 2563.38 1598.08 . 2.000 2400.00 0.00 0.00 117.60 4174.00 131.81 0.00 131.93 5.46 3.95 2819.94 1786.89 2.000 2400.00 0.00 0.00 117.60 5069.00 132.70 0.00 132.81 5.11 4.02 3394.97 2242.17 2.010 620.00 0.00 0.00 118.30 2913.00 130.71 0.00 130.85 6.63 3.98 2037.81 1131.68 2.010 620.00 0.00 0.00 118.30 3792.00 131.66 0.00 131.79 6.29 4.11 2630.92 1511.58 2.010 620.00 0.00 0.00 118.30 4174.00 132.06 0.00 132.18 6.11 4.14 2886.91 1689.31 2.010 620.00 0.00 0.00 118.30 5069.00 132.93 0.00 133.04 5.71 4.20 3459.09 2121.12 2.410 2340.00 0.00 0.00 119.70 2913.00 132.56 0.00 132.77 13.74 4.62 1179.34 785.86 2.410 2340.00 0.00 0.00 119.70 3792.00 133.42 0.00 133.64 14.04 4.94 1487.15 1011.93 2.410 2340.00 0.00 0.00 119.110 4174.00 133.76 0.00 133.99 14.06 5.05 1619.44 1113.05 2.410 234C.00 0.00 0.00 119.70 5069.00 134.51 0.00 134.74 13.81 5.23 1923.96 1364.18 2.640 1200.00 0.00 0.00 120.80 2913.00 133.94 0.00 134.16 13.32 4.66 1003.10 798.25 2.640 1200.00 0.00 0.00 120.80 3792.00 134.90 0.00 135.18 16.21 5.34 1146.00 941.51 2.640 1200.00 0.00 0.00 120.80 4174.00 135.28 0.00 135.59 17.38 5.61 1204.15 1001.19 2.640 1200.00 0.00 0.00 120.80 5069.00 136.07 0.00 136.43 19.98 6.20 1331.75 1134.16 EFFECTIVE FIS MODEL FANNO CREEK Cross section 1.4 1 1 E1 1 e1 u a t1 i 0 n1 1 1 1 140 E 135 1 V 130 a t 125 i 0 n 120 115 110 1 160 240 320 400 480 560 640 720 800 880 960 1040 1120 Distance EFFECTIVE FIS MODEL 0 40 80 120 160 200 240 280 320 360 400 440 480 Distance FANNO CREEK Cross section 1.43 .875 0 0 •• ••. FANNO CREEX Cross section 1.44 145 .075 A?.116 0 0 140 E 135 1 V 130 a t 125 i 0 11 120 115 110 160 240 320 400 480 560 640 720 800 880 960 1040 1120 Distance FANNO CREEK Cross section 1.47 E 1 e u a t i 0 n EFFECTIVE FIS MODEL.: 0 40 80 120 160 200 240 280 320 360 400 440 480 Distance 2wn Date: 31MAR95 Run Time: 10:51:58 lever.: 6.52 C-2 WATER SURFACE PROFILES rsion 4.6.2; May 1991 S IS AN ARCHIVAL RUN ALL ;ATA AND RESULTS ARE SAVED ON UNIT 96 HEC-2 PC FILE NAME : FANNC83C.DAT INPUT TAPE 400 FILENAME: FANNIC3T HYDSEC TAPE 531 FILENAME #11 : ICFANNO3 FANNO CREEK R.M. 0 - 13.1 10-, 50-, 100-, AND 500-YEAR FLOODS DURHAM, TIGARD, BEAVERTON AND WASHINGTON COUNTY, OREGON FLOOD INSURANCE STUDY JUNE 1980 REVISED OCTOBER 1983 **«*rfr STUDY REACH : CONFLUENCE WITH TUALATIN R TO U/S OF SCROLLS FERRY ROAD «**4+fr W&H PACIFIC MODIFICATIONS FOR EXISTING CONDITIONS - MARCH 1995 ****1ff ***«*ff CROSS SECTIONS: CHANNEL BY OLSON ENGINEERING, VANCOUVER, WA OVERBANK (PHOTOGRAMMETRIC) BY SPENCER B. GROSS, BEAVERTON TOPOGRAPHY : CITY OF TIGARD TOPO, 1974; CITY OF BEAVERTON TOPO, 1971 MAPS USED : WASHINGTON CO. FIS WORK MAPS 78, 79, 80, 81, 104, 105, 106 AERIAL PHOTOGRAPHY DATED 9 MAY 1977 BY WAC CORP, EUGENE, OR ORTHOPHOTO BASE BY DAVID C. SMITH, PORTLAND, OR FIELD SURVEYS BY USCE, PORTLAND DISTRICT ADDITIONAL FIELD CONTROL BY SPAN INTERNATIONAL, PHOENIX, AZ ADDITIONAL HORIZONTAL CONTROL BY SPENCER GROSS, BEAVERTON DISCHARGES START METHOD NORMAL DEPTH, SLOPE = 0.002462 *«**** US ARMY ENGINEER DISTRICT, PORTLAND, OREGON ENGINEERING DIV, PLANNING BRANCH, HYDROLOGY SECT GEORGE HOLMES, CHIEF, HYDROLOGY SECT. KEN SOOERLIND, STUDY MANAGER ENG. HYDRAULICS BY NORMAN ASSOCIATES FANNO CREEK, RM 0.02 TO RM 13.06 10 YEAR FLOOD FANNO CREEK ICHECK ING NINV IDIR STRT METRIC HVINS 0 -1 2 0.002462 Data File: fno_xtg.hc2o • Page 1 THIS RUN EXECUTED 31MAR95 10:51:58 WSEL FD 118.0 Existing Conditions Model. run Date: 31MAR95 Run Time: 10:51:58 WV W: 6.52 Data File: fno _xtg.hc • • Page 3 3 1.05 1.5 2.6 0 22.0 20 1154 3.49 110.0 110.0 1 1.11 - 0 0 0 40 40 40 0 0.1 0 0 1 127.9 130.0 i 4 155 132.0 132.0 195 131.8 128.0 420 130.0 126.2 i 421 130.0 130.0 0.100 0.095 0.050 1 1.14 18 185 240 120 140 130 t 130.0 0 124.0 50 122.0 95 120.0 130 116.0 185 2 114.0 210 112.3 216 112.1 219 110.3 224 114.0 225 R 118.0 230 120.0 240 122.0 280 124.0 385 128.0 385 2 128.0 425 130.0 450 140.0 500 0.090 0.110 0.055 1 1.32 21 60 122 410 960 960 134.0 0 132.0 50 130.0 60 120.0 65 118.0 70 115.3 74 115.2 80 114.7 83 114.6 87 114.2 91 113.1 96 113.1 99 118.0 110 120.0 122 122.0 130 t 124.0 225 126.0 252 128.0 280 130.0 300 132.0 313 134.0 332 0.095 0.100 0.055 1.40 18 175 250 420 310 400 134.0 0 130.0 25 126.0 60 124.0 175 120.0 195 116.5 203 116.4 209 115.9 212 115.8 216 115.4 220 114.3 225 114.3 228 120.0 230 132.0 250 134.0 280 136.0 310 138.0 380 140.0 425 0.3 0.5 4 0.075 838 0.050 874 0.085 1000 0.060 1044 1.431 27 838 874 200 230 200 0 0 140.3 185 140.6 300 140.1 400 139.7 456 138.8 500 135.0 560 134.4 590 132.2 605 130.7 615 130.7 720 130.7 804 122.9 816 122.7 824 122.9 838 118.6 843 117.7 847 116.9 858 117.2 862 122.4 867 125.2 874 125.1 879 124.6 889 127.5 893 130.5 896 134 950 138 1000 140 1044 4 0.075 838 0.050 874 0.110 1000 0.060 1044 1.10 1.5 2.35 0 26.85 4 727 2.0 116.9 116.9 1.441 0 0 0 40 40 40 0 0 0 0 1 130.4 132.2 5 605 132.2 132.2 720 132.2 132.2 804 132.2 130.4 896 132.2 130.5 950 134 134 0.080 0.100 0.052 0.3 0.5 1.47 19 262 300 150 170 200 140.0 0 138.0 10 136.0 45 134.0 60 130.0 85 130.0 150 126.8 155 124.0 230 122.0 262 120.0 268 117.5 273 117.4 279 116.9 282 116.8 286 116.4 290 115.3 295 120.0 300 130.0 350 140.0 447 Existing Conditions Model Ruin Date 31kAR95 SECNO XLCH 1.320 960.00 1.320 960.00 1.320 960.00 1.320 960.00 1.400 400.00 1.400 400.00 1.400 400.00 1.400 400.00 1.431 200.00 1.431 200.00 1.431 200.00 1.431 200.00 1.441 40.00 1.441 40.00 1.441 40.00 1.441 40.00 1.470 200.00 1.470 200.00 1.470 200.00 1.470 200.00 1.530 490.00 1.530 490.00 1.530 490.00 1.530 490.00 2.000 2400.00 2.000 2400.00 2.000 2400.00 2.000 2400.00 2.010 620.00 2.010 620.00 2.010 620.00 2.010 620.00 2.410 2340.00 2.410 2340.00 2.410 2340.00 2.410 2340.00 2.640 1200.00 2.640 1200.00 2.640 1200.00 2.640 1200.00 Run Time: 10:51:58 9Ve *: 6.52 ELTRD ELLC ELMIN G 0.00 0.00 113.10 2923.00 0.00 0.00 113.10 3809.00 0.00 0.00 113.10 4193.00 0.00 0.00 113.10 5093.00 0.00 0.00 114.30 2923.00 0.00 0.00 114.30 3809.00 0.00 0.00 114.30 4193.00 0.00 0.00 114.30 5093.00 0.00 0.00 116.90 2923.00 0.00 0.00 116.90 3809.00 0.00 0.00 116.90 4193.00 0.00 0.00 116.90 5093.00 132.20 130.40 116.90 2923.00 132.20 130.40 116.90 3809.00 132.20 130.40 116.90 4193.00 132.20 130.40 116.90 5093.00 0.00 0.00 115.30 2923.00 0.00 0.00 115.30 3809.00 0.00 0.00 115.30 4193.00 0.00 0.00 115.30 5093.00 0.00 0.00 115.70 2913.00 0.00 0.00 115.70 3792.00 0.00 0.00 115.70 4174.00 0.00 0.00 115.70 5069.00 0.00 0.00 117.60 2913.00 0.00 0.00 117.60 3792.00 0.00 0.00 117.60 4174.00 0.00 0.00 117.60 5069.00 0.00 0.00 118.30 2913.00 0.00 0.00 118.30 3792.00 0.00 0.00 118.30 4174.00 0.00 0.00 118.30 5069.00 0.00 0.00 119.70 2913.00 0.00 0.00 119.70 3792.00 0.00 0.00 119.70 4174.00 0.00 0.00 119.70 5069.00 0.00 0.00 120.80 2913.00 0.00 0.00 120.80 3792.00 0.00 0.00 120.80 4174.00 0.00 0.00 120.80 5069.00 Data File: CIlSEL 124.88 125.94 126.33 127.17 126.11 127.18 127.59 128.46 126.95 127.92 128.29 129.07 127.27 128.31 128.70 129.56 128.66 129.91 130.41 131.49 129.18 130.43 130.92 131.98 130.67 131.77 132.21 133.18 130.92 131.98 132.41 133.36 132.59 133.50 133.87 134.69 133.95 134.94 135.32 136.14 fno_xtg.hc0 • CRILIS EG 10•KS 0.00 125.29 25.45 0.00 126.40 26.81 0.00 126.82 27.41 0.00 127.71 28.77 0.00 126.66 43.49 0.00 127.75 41.19 0.00 128.17 40.52 0.00 129.06 39.45 0.00 128.02 72.43 0.00 129.20 75.46 0.00 129.65 76.84 0.00 130.65 81.21 0.00 128.24 62.20 0.00 129.46 64.50 0.00 129.94 65.71 0.00 130.98 68.43 0.00 128.90 12.43 0.00 130.17 12.31 0.00 130.67 12.15 0.00 131.76 11.55 0.00 129.34 8.34 0.00 130.59 7.56 0.00 131.07 7.31 0.00 132.13 6.90 0.00 130.78 5.12 0.00 131.87 4.62 0.00 132.31 4.44 0.00 133.27 4.09 0.00 131.04 5.77 0.00 132.09 5.26 0.00 132.51 5.05 0.00 133.45 4.64 0.00 132.80 13.45 0.00 133.72 13.37 0.00 134.09 13.24 0.00 134.90 12.61 0.00 134.17 13.25 0.00 135.22 16.03 0.00 135.63 17.13 0.00 136.50 19.52 Page 26 VCH AREA .01K 5.33 718.35 579.45 5.85 909.96 735.59 6.05 986.21 800.95 6.49 1153.71 949.45 6.09 584.15 443.23 6.41 784.87 593.49 6.53 864.37 658.71 6.79 1038.25 810.83 8.96 407.77 343.46 9.92 489.08 438.49 10.30 521.17 478.32 11.19 588.06 565.15 8.54 434.08 370.61 9.44 521.95 474.28 9.81 556.38 517.27 10.62 631.75 615.66 4.69 1028.53 829.24 5.03 1272.83 1085.52 5.13 1399.96 1203.14 5.28 1704.04 1498.42 4.19 1540.65 1008.87 4.30 1985.02 1379.46 4.35 2163.14 1543.28 4.47 2554.53 1929.39 3.58 2107.50 1286.90 3.63 2790.56 1764.79 3.64 3071.76 1981.02 3.68 3707.52 2506.75 3.77 2169.86 1212.73 3.83 2837.14 1653.88 3.84 3117.06 1857.65 3.87 3746.62 2354.25 4.59 1190.98 794.15 4.85 1520.51 1037.22 4.93 1663.36 1147.10 5.04 1996.06 1427.49 4.65 1004.99 800.12 5.32 1151.34 947.23 5.58 1211.16 1008.38 6.15 1343.98 1147.44 Existing Conditions Model r •• •• 144 140 E 136 1 u 132 a t 128 i 0 11 124 120 116 160 240 320 400 480 560 640 720 800 880 960 1040 1120 Distance FANNO CREEK Cross section 1.441 144 075 0 0 140 E 136 1 u 132 a t 128 i 0 n 124 120 116 160 240 320 400 480 560 640 720 800 880 960 1040 1120 Distance FXIgTINF; r.nNniTIONq MODEL FANNO CREEK Cross section 1.431 075 r 0 0 irr Dater 31MAR95 Run Time: 10:58:39 WO 6.52 , Data File *ffff+YYf #. eY++f Yf*#tYf tYY«*****# -2 WATER SURFACE PROFILES sion 4.6.2; May 1991 t*fY#***+ffttY#tf«*kfYY********** IS AN ARCHIVAL RUN ALL DATA AND RESULTS ARE SAVED ON UNIT 96 HEC-2 PC FILE NAME : FANNC83C.DAT INPUT TAPE 400 FILENAME: FANNIC3T HYDSEC TAPE 531 FILENAME #11 : ICFANNO3 FANNO CREEK R.M. 0 - 13.1 10-, 50-, 100-, AND 500-YEAR FLOODS DURHAM, TIGARD, BEAVERTON AND WASHINGTON COUNTY, OREGON FLOOD INSURANCE STUDY JUNE 1930 REVISED OCTOBER 1983 TUDY REACH : CONFLUENCE WITH TUALATIN R TO U/S OF SCROLLS FERRY ROAD +++*xff W8H PACIFIC MODIFICATIONS FOR PROPOSED CONDITIONS AT DURHAM ROAD X-ING MARCH 1995 ROSS SECTICNS: CHANNEL BY OLSON ENGINEERING, VANCOUVER, WA OVERBANK (PHOTOGRAMMETRIC) BY SPENCER B. GROSS, BEAVERTON OPOGRAPHY : CITY OF TIGARD TOPO, 1974; CITY OF BEAVERTON TOPO, 1971 APS USED : WASHINGTON CO. FIS WORK MAPS 78, 79, 80, 81, 104, 105, 106 AERIAL PHOTOGRAPHY DATED 9 MAY 1977 BY WAC CORP, EUGENE, OR ORTHOPHOTO BASE BY DAVID C. SMITH, PORTLAND, OR FIELD SURVEYS BY USCE, PORTLAND DISTRICT ADDITIONAL FIELD CONTROL BY SPAN INTERNATIONAL, PHOENIX, AZ ADDITIONAL HORIZONTAL CONTROL BY SPENCER GROSS, BEAVERTON ISCHARGES TART METHOO NORMAL DEPTH, SLOPE = 0.002462 +*+xxx US ARMY ENGINEER DISTRICT, PORTLAND, OREGON ENGINEERING DIV, PLANNING BRANCH, HYDROLOGY SECT GEORGE HOLMES, CHIEF, HYDROLOGY SECT. KEN SODERLIND, STUDY MANAGER ENG. ++xx+«x HYDRAULICS BY NORMAN ASSOCIATES *xx++Yx FANNO CREEK, RM 0.02 TO RM 13.06 10 YEAR FLOOD FANNO CREEK ICHECK INQ NINV IDIR STRT METRIC HVINS Q THIS RUN EXECUTED 31MAR95 10:58:39 WSEL FQ -1 2 0.002462 118.0 Proposed Conditions Model fno_prop.hc * • Page 1 Rwn Date 31KAR95 Run Time: 10:58:39 1.05 1.5 2.6 0 1.11 -' 0 0 0 0 0 1 127.9 4 155 132.0 132.0 421 130.0 130.0 0.100 0.095 0.050 1.14 18 185 240 120 140 130 130.0 0 124.0 50 122.0 95 120.0 114.0 210 112.3 216 112.1 219 110.3 118.0 230 120.0 240 122.0 280 124.0 128.0 425 130.0 450 140.0 500 0.090 0.110 0.055 1.32 21 60 122 410 960 960 134.0 0 132.0 50 130.0 60 120.0 115.3 74 115.2 80 114.7 83 114.6 113.1 96 113.1 99 118.0 110 120.0 124.0 225 126.0 252 128.0 280 130.0 134.0 332 0.095 0.100 0.055 1.40 18 175 250 420 310 400 134.0 0 130.0 25 126.0 60 124.0 116.5 203 116.4 209 115.9 212 115.8 114.3 225 114.3 228 120.0 230 132.0 136.0 310 138.0 380 140.0 425 0.3 0.5 3 .06 839 0.050 865 .06 1044 1.431 25 839 865 180 210 180 140.3 185 140.6 300 140.1 400 139.7 138.06 560 138.06 590 138.06 605 138.06 138.06 799 131.0 799 120.3 814 120 117.7 847 116.9 858 117.2 862 120 132.6 897 138.06 897 138.06 950 138.06 3 .06 839 0.050 865 .06 1044 1.10 1.5 2.35 0 44.8 0 1074 1.441 0 0 0 60 60 60 0 0 1 132.6 138.06 5 605 138.06 138.06 720 138.06 138.06 897 138.06 132.6 950 138.06 138.06 0.080 0.100 0.052 0.3 0.5 1.47 19 262 300 150 170 200 140.0 0 138.0 10 136.0 45 134.0 130.0 150 126.8 155 124.0 230 122.0 117.5 273 117.4 279 116.9 282 116.8 115.3 295 120.0 300 130.0 350 140.0 We 0: 6.52 Data File: fno_prop.h * is 22.0 20 1154 3.49 110.0 40 40 40 0 0.1 130.0 195 131.8 128.0 420 130.0 Page 3 110.0 126.2 130 116.0 185 224 114.0 225 385 128.0 385 65 118.0 70 87 114.2 91 122 122.0 130 300 132.0 313 175 120.0 195 216 115.4 220 250 134.0 280 0 0 456 138.8 615 138.06 839 118.6 865 120.1 1000 140 1.5 116.9 0 0 799 138.06 500 720 843 868 1044 116.9 132.6 60 130.0 85 262 120.0 268 286 116.4 290 447 Proposed Conditions Model ?uM Date:' 31KAR95 Run Time: 10:58:39 •er J*. 6.52 Data file: fno_prop.hc 0 . Page 26 SECNO XLCH ELTRD ELLC ELHIN 0 CWSEL CRILIS EG 10•KS VCH AREA OIK 1.320 960.00 0.00 0.00 113.10 2923.00 124.88 0.00 125.29 25.45 5.33 718.35 579.45 1.320 960.00 0.00 0.00 113.10 3809.00 125.94 0.00 126.40 26.81 5.85 909.96 735.59 1.320 960.00 0.00 0.00 113.10 4193.00 126.33 0.00 126.82 27.41 6.05 986.21 800.95 1.320 960.00 0.00 0.00 113.10 5093.00 127.17 0.00 127.71 28.77 6.49 1153.71 949.45 1.400 400.00 0.00 0.00 114.30 2923.00 126.11 0.00 126.66 43.49 6.09 584.15 443.23 1.400 400.00 0.00 0.00 114.30 3809.00 127.18 0.00 127.75 41.19 6.41 784.87 593.49 1.400 400.00 0.00 0.00 114.30 4193.00 127.59 0.00 128.17 40.52 6.53 864.37 658.71 1.400 400.00 0.00 0.00 114.30 5093.00 128.46 0.00 129.06 39.45 6.79 1038.25 810.83 1.431 180.00 0.00 0.00 116.90 2923.00 126.78 0.00 127.41 35.73 7.36 498.67 489.02 1.431 180.00 0.00 0.00 116.90 3809.00 127.80 0.00 128.59 39.04 8.28 581.60 609.62 1.431 180.00 0.00 0.00 116.90 4193.00 128.19 0.00 129.05 40.58 8.66 613.73 658.25 1.431 180.00 0.00 0.00 116.90 5093.00 129.00 0.00 130.02 44.12 9.50 683.23 766.72 1.441 60.00 138.06 132.60 116.90 2923.00 127.05 0.00 127.63 31.53 7.06 520.84 520.54 1.441 60.00 138.06 132.60 116.90 3809.00 128.11 0.00 128.83 34.55 7.95 607.05 648.05 1.441 60.00 138.06 132.60 116.90 4193.00 128.51 0.00 129.30 35.83 8.31 641.14 700.50 1.441 60.00 138.06 132.60 116.90 5093.00 129.37 0.00 130.30 38.72 9.09 715.45 818.46 1.470 200.00 0.00 0.00 115.30 2923.00 127.80 0.00 128.14 18.83 5.47 865.13 673.66 1.470 200.00 0.00 0.00 115.30 3809.00 129.02 0.00 129.38 17.94 5.76 1098.01 899.41 1.470 200.00 0.00 0.00 115.30 4193.00 129.50 0.00 129.86 17.68 5.89 1191.41 997.21 1.470 200.00 0.00 0.00 115.30 5093.00 130.54 0.00 130.91 16.96 6.10 1436.12 1236.70 1.530 490.00 0.00 0.00 115.70 2913.00 128.57 0.00 128.79 11.72 4.77 1331.92 851.06 1.530 490.00 0.00 0.00 115.70 3792.00 129.76 0.00 129.97 10.47 4.87 1743.97 1171.85 1.530 490.00 0.00 0.00 115.70 4174.00 130.23 0.00 130.44 10.07 4.91 1913.14 1315.58 1.530 490.00 0.00 0.00 115.70 5069.00 131.24 0.00 131.45 9.35 5.00 2282.67 1657.50 2.000 2400.00 0.00 0.00 117.60 2913.00 130.47 0.00 130.60 5.78 3.76 1988.78 1211.39 2.000 2400.00 0.00 0.00 117.60 3792.00 131.48 0.00 131.60 5.38 3.85 2613.67 1634.35 2.000 2400.00 0.00 0.00 117.60 4174.00 131.89 0.00 132.01 5.22 3.89 2871.86 1826.21 2.000 2400.00 0.00 0.00 117.60 5069.00 132.78 0.00 132.90 4.90 3.95 3452.15 2289.72 2.010 620.00 0.00 0.00 118.30 2913.00 130.75 0.00 130.89 6.45 3.94 2063.47 1147.26 2.010 620.00 0.00 0.00 118.30 3792.00 131.73 0.00 131.86 6.05 4.05 2674.73 1541.17 2.010 620.00 0.00 0.00 118.30 4174.00 132.13 0.00 132.25 5.87 4.08 2932.84 1722.30 2.010 620.00 0.00 0.00 118.30 5069.00 133.00 0.00 133.12 5.50 4.14 3510.54 2162.07 2.410 2340.00 0.00 0.00 119.70 2913.00 132.56 0.00 132.77 13.68 4.62 1181.76 787.58 2.410 2340.00 0.00 0.00 119.70 3792.00 133.43 0.00 133.66 13.91 4.92 1493.68 1016.87 2.410 2340.00 0.00 0.00 119.70 4174.00 133.78 0.00 134.01 13.91 5.03 1627.33 1119.15 2.410 2340.00 0.00 0.00 119.70 5069.00 134.54 0.00 134.77 13.60 5.20 1935.58 1374.31 2.640 1200.00 0.00 0.00 120.80 2913.00 133.94 0.00 134.16 13.30 4.66 1003.50 798.64 2.640 1200.03 0.00 0.00 120.80 3792.00 134.91 0.00 135.19 16.18 5.34 1147.03 942.85 2.640 1200.00 0.00 0.00 120.80 4174.00 135.29 0.00 135.59 17.34 5.61 1205.37 1002.44 2.640 1200.00 0.00 0.00 120.80 5069.00 136.08 0.00 136.44 19.90 6.19 1333.65 1136.24 Proposed Conditions Model 00 00 _ FANNO CREEK Cross section 1.431 144 060 ^1 F3---.060-- 0 140 E 136 1 u 132 a t 128 i 0 n 124 120 116 160 240 320 400 480 560 640 720 800 880 960 1040 1120 Distance FANNO CREEK Cross section 1.441 144 .068 r--.060-E 0 140 E 136 e 132 a t 128 i 0 11 124 120 116 , 160 240 320 400 480 560 640 7ZO 800 880 960 1040 11ZO Distance PROPOSED CONDITIONS MODEL