Hearings Officer Packet - 04/24/2006Ct 1 1A,, Av~
Ir 9a/A RD HEARINGS OFFICER
MONDAY - APRIL 24, 2006 - 7:00 PM
Assistive Listening Devices are available for persons with impaired hearing and should be scheduled for Hearings Officer meetings
by noon on the Friday prior to the meeting. Please call 503-639-4171, Ext. 2438 (voice) or 503-684-2772 (TDD -
Telecommunications Devices for the Deao. Upon request, the City will also endeavor to arrange for 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. To
request such services, please notify the City of Tigard of your need(s) by 5:00 p.m., no less than one (1) week prior to the meeting
date at the same phone numbers listed above so that we can make the appropriate arrangements.
Hearings are held in Town Hall at the City of Tigard at 13125 SW Hall Boulevard
Staff reports are available to the public 7 days prior to the hearing date
1. CALL TO ORDER
2. PUBLIC HEARING
2.1 TUALATIN RIVER TRAIL PROTECT
CONDITIONAL USE PERMIT (CUP) 2006-10001
SENSITIVE LANDS REVIEW (SLR) 2006-10002
REQUEST: The City, as applicant, is requesting Sensitive Lands Review approval to construct an
8-foot-wide paved, multi-use trail with floodplain. The trail segment is approximately 1,100 feet in
length and is located entirely within the 100-year floodplain of the Tualatin River. This trail
segment will connect with a 220-foot section of the same trail that was permitted through the City
of Tualatin. Under a 2004 Intergovernmental Agreement (IGA), the City delegated to Tualatin the
authority to review and approve permitting for the 220 portion of the trial that lies within the City
of Tigard. The trail will provide access to the future Tualatin River Pedestrian Bridge and to the
City of Durham and City of Tualatin trail systems. The project will temporarily impact 6,245 square
feet of the 125-foot vegetated corridor due to construction staging and will permanently impact
8,520 square feet of vegetated corridor as a result of the trail construction. The project is located
entirely within the floodway.
LOCATION: The proposed project is located within the Tualatin River Floodplain, east of Cook
Park and west of the Burlington Northern Rail corridor. The path will inter-connect the Cook and
Durham Park trail systems. WCTM 2S114DA, Tax Lot 100.
Page 1 of 2
ZONE: R-4.5: Low Density Residential District. The R-4.5 zoning district is designed to
accommodate detached single-family homes with or without accessory residential units at a
minimum lot size of 7,500 square feet. Duplexes and attached single-family units are permitted
conditionally. Some civic and institutional uses are also permitted conditionally. APPLICABLE
REVIEW CRITERIA: Community Development Code Chapters 18.330, 18.390, 18.510, 18.775
and 18.790.
3. OTHER BUSINESS
4. ADJOURNMENT
Page 2 of 2
Depending on the number of people wishing to testify, the Tigard Hearing's Officer may limit the
amount of time each person has to speak. We ask you to limit your oral comments to 3 - 5 minutes.
The Hearing's Officer may further limit time if necessary. Written comments are always appreciated
by the Hearing's Officer to supplement oral testimony.
AGENDA ITEM NO.: 2.1 DATE: APRIL 24, 2006
PAGE 1 OF-L
FILE NAME: TUALATIN RIVER TRAIL PROJECT
CASE NOS.: CONDITIONAL USE PERMIT (CUP) 2006-10001
SENSITIVE LANDS REVIEW (SLR) 2006-10002
IF YOU WISH TO TESTIFY ON THE ITEM INDICATED ABOVE,
PLEASE PRINT YOUR NAME, ADDRESS & INCLUDE YOUR ZIP CODE
PROPONENT - (Speaking In Favor or Neutral) OPPONENT - (Speaking Against)
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BEFORE THE LAND USE HEARINGS OFFICER
FOR THE CITY OF TIGARD, OREGON
Regarding an application by the City of Tigard for conditional ) F I N A L O R D E R
use permit and sensitive lands review approval for a roughly ) CUP2006-10001
1100 foot section of a 10-foot wide trail within the Tualatin River) SLR2006-10002
floodplain east of Cook Park, in the City of Tigard, Oregon ) (Tualatin River Trail)
A. FINDINGS AND CONCLUSIONS
1. The applicant, City of Tigard, requests conditional use permit ("CUP") and
sensitive lands review for construction of a 10-foot wide paved public use trail between
Cook Park and the Burlington Northern Rail corridor. The applicant will construct the
trail on tax lot 100, WCTM 2S 114DA (the "site"). The entire 1100-foot long trail
segment is located within the 100-year floodplain of the Tualatin River. The trail will
connect with the existing trail system within Cook Park on the west and existing and
planned trail systems in the Cities of Tualatin and Durham to the east, via the planned
Tualatin River pedestrian bridge. Additional basic facts about the site and surrounding
land and applicable approval standards are provided in the Staff Report to the Hearings
Officer dated April 14, 2006 (the "Staff Report"), incorporated herein by reference.
2. Tigard Hearings Officer Joe Turner (the "hearings officer") held a duly noticed
public hearing on April 24, 2006 to receive and consider public testimony in this matter.
The record includes a witness list, materials in the casefile as of the close of the record,
including materials submitted after the hearing, and an audio record of the hearing. At the
beginning of the hearing, the hearings officer made the declaration required by ORS
197.763. The hearings officer disclaimed any ex parte contacts, bias or conflicts of
interest. The following is a summary by the hearings officer of selected relevant
testimony offered at the hearing.
a. City planner Duane Roberts summarized the Staff Report. He noted that
Clean Water Services ("CWS") recently issued a permit for the project. The City received
three written comments about the project.
i. The City Public Works Department argued that the applicant
should be required to build portions of the trail on top of the existing grade in order to
avoid impacts to existing mature trees on the site. Mr. Roberts testified that the trail will
only impact one tree; a 28-inch ash located 14 feet from the edge of the trail. The location
of the trail is largely dictated by the need to connect to the existing trail segments and to
limit the environmental impacts of the trail. The applicant's arborist can locate the major
roots of the tree prior to construction and, if necessary, relocate the trail to a limited
extent to reduce impacts to the tree roots. This is required by condition of approval 2. The
City engineering department determined that constructing the trail on top of the existing
grade would not eliminate impacts to the tree roots. Some excavation would be necessary
to remove topsoil and create a level surface for the trail. The City Arborist concluded that
0
such excavation would have a similar impact on the root system of the tree. In addition,
constructing the trail at grade would result in fill within the floodplain, which the
applicant would be required to balance with cut elsewhere in the floodplain and an
engineer's certification that the cut and fill will not increase the base flood elevation.
ii. Jeannot Whittle requested the City include seating and trash
receptacles along the trail. Mr. Roberts testified that the City will place park benches and
trash containers along the path after it is completed.
iii. David Baumgarten argued that the City should construct the
trail with asphalt rather than concrete, because concrete is hard to run on. Mr. Roberts
testified that the City chose to construct the trail with concrete because it has a much
longer life than asphalt. A concrete trail will reduce the City's maintenance costs on this
high use trail. In addition, construction of an asphalt trail would require additional
excavation, increasing the potential impacts on the adjacent ash tree.
b. City Parks Manager Dan Plaza and environmental consultant Stacy
Benjamin testified on behalf of the applicant. Mr. Plaza summarized the proposed trail
project and accepted the findings and conditions of approval in the Staff Report without
exceptions or objections. He waived the applicant's right to submit a final written
argument. Ms. Benjamin testified that CWS recently issued a service provider letter for
the trail project.
c. At the end of the hearing, the hearings officer closed the public record
and announced his intention to approve the application subject to recommended
conditions in the Staff Report.
3. City staff recommended that the hearings officer approve the application based
on findings and conclusions and subject to conditions of approval recommended in the
Staff Report. The applicant accepted those conditions without exceptions. No one
disputed the findings in the Staff Report. The hearings officer agrees with those findings,
conclusions and conditions, and adopts the affirmative findings in the Staff Report as
support for this Final Order.
4. Based on the findings and discussion provided or incorporated in this final
order, the hearings officer concludes that the applicant sustained the burden of proof that
the proposed CUP and sensitive lands review do or will comply with the applicable
criteria of the Community Development Code, provided development that occurs after
this decision complies with applicable local, state, and federal laws and with conditions
of approval warranted to ensure such compliance occurs in fact. Therefore those
applications should be approved subject to such conditions.
CUP2006-10001 and SLR2006-10002 Hearings Officer Final Order
(Tualatin River Trail) Page 2
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B. ORDER
In recognition of the findings and conclusions contained herein, and incorporating
the Staff Report and public testimony and exhibits received in this matter, the hearings
officer hereby approves CUP2006-10001 and SLR2006-10002 (Tualatin River Trail),
subject to the following conditions of approval:
CONDITIONS OF APPROVAL
THE FOLLOWING CONDITIONS SHALL BE SATISFIED
PRIOR TO ISSUANCE OF THE SITE AND/OR BUILDING PERMITS:
Submit to the Planning Department (Duane Roberts, 639-4171, ext. 2444) for review
and approval:
1. Prior to site work, the applicant shall provide a revised tree protection plan. No site
work shall begin until appropriate tree fencing/demarcation has been installed on
site to clearly identify tree protection areas and construction perimeters. Tree
protection must be installed and inspected by the City's Arborist, Matt Stine
2. Prior to site work, the applicant shall use an air spade or some other non-harmful
method for determining the presence and location of major tree roots within the trail
alignment anywhere trees over 6 inches in caliper are located within 30 feet of the
edge of pavement. Should any roots be detected, the applicant shall consider altering
the trail route within the boundaries of the easement area in order to minimize root
damage.
3. Prior to site work, the applicant shall meet the conditions of Clean Water Services
Service Provider Letter file #05-004508.
DATED this 271" day of April 2006.
J
Joe Turner, Esq., AICP
City of Tigard Land Use Hearings Officer
CUP2006-10001 and SLR2006-10002 Hearings Officer Final Order
(Tualatin River Trail) Page 3
"TAB B"
46
Applicant's Materials & All Correspondence
Filed with Hearings Officer Prior to the Public
Hearing.
Agenda Item: 2.1
Hearing Date: At)ril 24.2006 Time: 7:00 PM
STAFF REPORT TO THE
HEARINGS OFFICER
FOR THE CITY OF TIGARD, OREGON
120 DAYS = N/A
SECTION I. APPLICATION SUMMARY
FILE NAME: TUALATIN RIVER TRAIL PROTECT
CASE NOS.: Conditional Use Permit CUP2006-10001
Sensitive Lands Review (SLR) SLR2006-10002
PROPOSAL: The City, as applicant, is requesting Sensitive Lands Review approval to construct an 8-foot-
wide paved, multi-use trail with floodplain. The trail seggmment is approximately 1,100 feet in
length and is located entirely within the 100-year floodplain of the Tualatin River. At its
eastern terminus, the segment will connect a 220-foot section of the same trail. This 220-
foot section lies within the City of Tigard, but has been permitted through the City of
Tualatin. Under a 2004 Tualatin River pedestrian bridge Intergovernmental Agreement
between the Cities of Tualatin, Tigard, and Durham, Tigard delegated to Tualatin the
authority to review and approve all permitting for this 220 foot section of the larger trial.
The completed trail, consisting of the Tigard-reviewed and Tualatin-reviewed sections, will
provide access to the future Tualatin River Pedestrian Bridge and to the City of Durham and
City of Tualatin trail systems. The present, Tigard-reviewed project, will temporarily impact
6,245 square feet of the 125-foot vegetated corridor due to construction staging and will
permanently impact 8,520 square feet of vegetated corridor as a result of the trail
construction.
APPLICANT: City of Tigard OWNER: City of Tigard
1315 SW Hall Blvd. 1315 SW Hall Blvd.
Tigard, OR 97223 Tigard, OR 97223
LOCATION: The proposed project is located within the Tualatin River Floodplain, east of Cook Park and
west of the Burlington Northern Rail corridor. The path will inter-connect the Cook and
Durham Park trail systems. WCTM 2S114DA,.Tax Lot 100.
ZONING: R-4.5: Low Density Residential District. The R-4.5 zoning district is designed to
accommodate detached single-family homes with or without accessory residential units at a
minimum lot size of 7,500 square feet. Duplexes and attached single-family units are
permitted conditionally. Some civic and institutional uses are also permitted conditionally.
APPLICABLE
REVIEW
CRITERIA: Community Development Code Chapters 18.330, 18.390, 18.510, 18.775 and 18.790.
SECTION II. STAFF RECOMMENDATION
Tualatin River Trail Sensitive Lands permit Application Page 1 of 17
CUP2006-10001 /SLR2006-10002
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Staff recommends that the Hearings Officer find that a portion of proposed pedestrian trail will not adversely affect
the health, safety and welfare of the City and meets the Approval Standards of the Tigard Development Code.
Therefore, Staff recommends APPROVAL, subject to the following recommended Conditions of Approval:
CONDITIONS OF APPROVAL
THE FOLLOWING CONDITIONS SHALL BE SATISFIED
PRIOR TO ISSUANCE OF THE SITE AND/OR BUILDING PERMITS:
Submit to the Planning Department (Duane Roberts, 639-4171, ext. 2444) for review and approval:
Prior to site work, the applicant shall provide a revised tree protection plan. No site work shall begin until
appropriate tree fencing/demarcation has been installed on site to clearly identify tree protection areas and
construction perimeters. Tree protection must be installed and inspected by the City's Arborist, Matt Stine
2. Prior to site work, the applicant shall use an air spade or some other non-harmful method for determining
the presence and location of major tree roots within the trail alignment anywhere trees over 6 inches in
caliper are located within 30 feet of the edge of pavement. Should any roots be detected, the applicant shall
consider altering the trail route within the boundaries of the easement area in order to minimize root
damage.
3. Prior to site work, the applicant shall meet the conditions of Clean Water Services Service Provider Letter
file #05-004508.
THIS APPROVAL SHALL BE VALID FOR 18 MONTHS
FROM THE EFFECTIVE DATE OF THE HEARINGS OFFICER'S DECISION.
SECTION III. BACKGROUND INFORMATION
Site Information and Pronosal Description:
The City proposes to construction an 8-foot wide, 1,100-foot long river-side recreational trail connecting the City's
79-acre Cook Park to the future Tualatin River Pedestrian Bridge. The trail segment is part of a long standing,
three-city strategy to construct a pedestrian bridge over the Tualatin River that will interconnect the trail systems
and major parks of the adjoining Cities of Tigard, Tualatin, and Durham. The proposed segment is identified in the
1983 and still current Tigard Comprehensive Plan and in the 1999 and still current Tigard Park System Master flan, both
developed with extensive pubic involvement. The trail segment also is identified as "regionally significant" on the
Metro Region Trail Map.
In addition to serving as a connecting approach to the bridge, the proposed trail will expand the local recreational
opportunities available to community residents and other trail users. These opportunities will include, among
others, access to picturesque views of the Tualatin River and the 40-acre Clean Water Services Durham wildlife area,
which is a winter home to a sizeable flock of mixed dabbling ducks and geese. These opportunities will contribute
to promoting a healthy lifestyle, encouraging non-motorized transportation, and enhancing quality of life in a
heavily populated area.
The site is located along the Tualatin River between Cook Park and the Burlington Northern Rail corridor. The
land through which the trail is proposed to travel is owned by Clean Water Services (CWS), which has provided to
the City a 25-foot-wide trail easement. The alignment was walked and laid out by agency staff. The stream banks of
Tualatin River Trail Sensitive Lands Permit Application Page 2 of 17
CUP2006-10001 /SLR2006-10002
the Tualatin River are steeply incised in the vicinity of the trail alignment. Wetlands are located inland and some
175 to 350 feet from the trail edge. The gently sloping property through which the trail is proposed to extend is
covered along its entire route with pasture grasses, including bentgrass, tall fescue, and meadow foxtail.
Enhancement of the vegetated corridor along the river by CWS within recent years has included the planting of red
alder, western red cedar, big-leaf maple, Douglas fir, and Oregon ash. Shrub plantings are present near the
upstream end of the trail alignment. These include vine maple, snowberry, and oceanspray. Native vegetation
remains in an area along the downstream portion of the trail. A notable stand of Douglas fir and Oregon ash is
found in this area. The impact of the trail on vegetation is mainly to pasture grasses and fescue. The alignment
minimizes riparian impact by preserving all existing trees. No wetlands are disturbed.
SECTION IV. SUMMARY OF APPLICABLE CRITERIA
A summary of the applicable criteria in this case in the Chapter order in which they are addressed in this staff report are
as follows:
A. Decision Making Procedures
18.330 (Conditional Use)
B. Zoning Districts
18.510 (Residential Zoning Districts)
C. Specific Development Standards
18.775 (Sensitive Lands)
18.790 (Tree Removal)
D. Impact Studv_
18.390
The proposal contains no elements related to the provisions of Code Chapters: 18.705 (Access, Egress & Circulation),
18.715 (Density Computations), 18.720 (Design Compatibility), 18.725 (Environmental Performance Standards), 18.730
(Exceptions to Development Standards), 18.742 (Home Occupations), 18.750 (Manufactured/Mobile Home
Regulations), 18.755 (Mixed Solid Waste & Recyclable Storage) 18.765 (Off-Street Parking and Loading Requirements),
18.760 (Nonconforming Situations), 18.780 (Signs), 18.785 (Temporary Uses,), 18.795 (Visual Clearance)„ and 18.798
(Wireless Communication Facilities). These Chapters are, therefore, found to be inapplicable as approval standards.
SECTION V. APPLICABLE REVIEW CRITERIA AND FINDINGS
COMPLIANCE WITH COMMUNITY DEVELOPMENT CODE SECTIONS:
A. DECISION MAKING PROCEDURES
This application includes a request for a Conditional Use approval of a Community Recreation use within a
Residential Zoning District. The Conditional Use criteria are listed below, along with a discussion of how each
applies to the project under review.
A. Approval Standards. The Hearings Officer shall approve with conditions, or deny an application for a
conditional use or to enlarge or alter a conditional use based on findings of fact with respect to each of the
following criteria:
1. The site size and dimensions provide adequate area for the needs of the proposed use.
Tualatin River Trail Sensitive Lands Permit Application Page 3 of 17
CUP2006-10001 /SLR2006-10002
The site size and dimensions are adequate to accommodate a trail. Clean Water Service standards
relating to the installation of a trail within the riparian area have been met, and the agency has issued
a Service Provider Letter for the project (March 6, 2006, File #05-004508). This letter is included in
the project file.
2. The impacts of the proposed use of the site can be accommodated considering size, shape,
location, topography, and natural features.
This criterion is addressed under the Sensitive Lands section of this proposal.
3. All required public facilities have adequate capacity to serve the proposal.
No other public facilities are affected by the trail.
4. The application requirements of the zoning district are met except as modified by this chapter.
The zoning of the land through which the trail extends is R-4.5. Community Recreation is a
Conditional Use within this zoning district. No other requirements of the district apply to this
proposal.
5. The applicable requirements of 18.330.050.
The requirements contained in this section are addressed separately below.
6. The supplementary requirements set forth in other chapters of this code including but not
limited to Chapter 18.780, Signs, and Chapter 18.360, Site Development Review, if applicable, are
met.
No signs are included within this proposal. None of the supplementary requirements of 18.360
apply to this proposal. The application does not involve a minor or major modification to approved
plans or existing development. No exceptions to standards are sought.
B. Conditions of approval. The Hearings Officer may impose conditions on the approval of a conditional
use, which are found necessary to ensure the sue is compatible with other uses in the vicinity, and that the
impact of the proposed use on the surrounding uses and public facilities is minimized. These conditions
may include, but are not limited to the following:
1. Limiting the hours, days, place and/or manner of operation.
City rules governing the public use of greenway trails prohibit littering and require the removal of
dog waste. Unlike parks, the hours of use are not limited to daylight hours.
2. Requiring design features which minimize environmental impacts such as noise, vibration, air
pollution, glare, odor and/or dust.
The environmental regulations applicable to this project are addressed elsewhere in this proposal.
3. Requiring additional setback areas, lot area, and/or lot depth or width.
Tualatin Itiver'frail Sensitive Lands Permit Application Page 4 of 17
CUP2006-10001 /SLR2006-10002
Not applicable. The proposal does not create any new lots. Setbacks are addressed under Sensitive
Lands requirements elsewhere in this report.
4. Limiting the building height, size or lot coverage, and/or location on the site
Not applicable. No buildings are proposed as part of this project.
5. Designating the size, number, location and/or design of vehicle access points.
Not applicable. The project does not include vehicular access.
6. Requiring street right-of-way to be dedicated and street(s )to be improved.
Not applicable.
7. Requiring landscaping, screening, drainage and/or surfacing of parking and loading areas.
Not applicable. No loading areas are proposed.
8. Limiting the number, size, location, height and/or lighting of signs.
Not applicable. No signs are proposed.
9. Limiting or setting standards for the location and/or intensity of outdoor lighting.
Not applicable. No outdoor lighting is proposed.
10. Requiring berms, screening or landscaping and the establishment of standards for their
installation and maintenance.
Not applicable. No berms are proposed. Fill is prohibited within the floodplain of land zoned for
residential use. Natural area landscaping requirements are addressed under the Sensitive Lands
section of this proposal.
11. Requiring and designing the size, height, location and/or materials for fences.
Not applicable. No fencing is proposed. The placement of fences is prohibited in both the
Vegetated Corridor area and in the floodway. The 25-foot trail easement area is located entirely
within the floodway and partially within the Vegetated Corridor area.
12. Requiring the protection and preservation of existing trees, soils, vegetation, watercourses,
habitat areas and/or drainage areas.
The environmental impacts of the trail are addressed under the Sensitive Lands section of this
proposal.
Tualatin 12iver Trail Sensitive Lands Permit Application Page 5 of 17
C UP2006-10001 /SLR2006-10002
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13. Requiring the dedication of sufficient open land area for a greenway adjoining and within the
floodplain when land form alterations and development are allowed within the 100-year floodplain.
The development proposed is a greenway trail. The land through which the trail will travel is
owned by Clean Water Services, which has provided an easement for the trail project (Recording
#2004-14017312/09/2004).
14. Requiring the construction of a pedestrian/bicycle pathway within the floodplain in
accordance with the adopted pedestrian/bicycle pathway plan.
A pedestrian/bicycle trail is the subject of this proposal.
18.330.050 Additional Development Standards for Conditional Use Types
050-5. Community Recreation and Parks:
a. ,All building setbacks shall be a minimum of 30 feet from any property line.
Not applicable. The proposed project does not include the construction of any buildings.
b. There are no off-street parking requirements, except that five automobile parking spaces
are required for a dog park or off-leash area with a fenced area of one acre or more
Not applicable. The proposed project does not include the construction of a dog park.
18.765.080 Off-Street Loading Requirements
Pursuant to the Table 18.765.2, minimum and maximum off-street vehicular and bicycle parking
requirements apply to Community Recreation. These standards are all based on. the floor area of the
proposed use. As such, the standards are not applicable here. The proposed project does not involve the
construction of any recreational or other structures.
FINDING: The trail is a conditional use with the residential zoning districts. The trail proposal meets all of the
Tigard Community Development Code standards pertaining to Community Recreation uses within residential
zoning districts and to Off-Street Parking and Loading Requirements.
B. ZONING DISTRICTS
This application includes a request to install a trail with a Residential Zoning District. Use Table 18.510.1 lists
Community Recreation as a conditional Use in the R-4.5 zoning district. The specific conditions and approval
criteria related to this use are listed in the Conditional Use chapter of the Tigard Community Development Code.
These are addressed in the Conditional Use section of this report.
C. SPECIFIC DEVELOPMENT STANDARDS
18.775 SENSITIVE LANDS
18.775.070 B (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
Tualatin River Trail Sensitive Lands Permit Application Page 6 of 17
CUP2006-10001 /SLR2006-10002
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 trail has been designed to avoid an increase in the zero-foot rise floodway. The finish elevation will be
at existing grade. Construction will involve excavation and placement of 4 inches' of gravel base below
grade followed by the placement of an additional 8 inches of concrete up to existing grade. The application
submittals include a letter dated March 16, 2006, signed Agustin P. Duenas, P.E., certifying that
construction of the trail will not result in any increase in flood levels during the base flood discharge.
18.775.070 B 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 18.120 of the Community Development Code shall be allowed in areas
designated residential subject to applicable zoning standards;
No land form alterations are proposed. The paved trail does meet the definition of development as used in
18.775.020.7. As a community recreational use, the trail is allowed as a conditional use on the site, which is
zoned residential (R-4.5).
18.775.070 B 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 proposed trail is located entirely within the 100-year floodplain. The finish elevation of the trail will be
at existing grade. A registered professional engineer has certified that construction of the trail will not result
in any increase in flood levels.
18.775.070 B 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 development is a segment of the Tualatin River Trail designed in accordance with the City's
pedestrian/bicycle plan.
18.775.070 B 5. The plans for the pedestrian/bicycle pathway indicate that no pathway will be below the
elevation of an average annual flood;
The subject trail segment will be above the elevation of the average annual flood. The trail is located beyond
the top of bank of the Tualatin River which is above the elevation of the average annual flood. The
elevation of the trail varies form 116 to 119 feet. According to engineering models, the elevation of the
average annual flood is expected to be confined below the top of bank, which is approximately a uniform
110 feet in elevation within the project area.
18.775.070 B 6. The necessary U.S. Army Corps of Engineers and State of Oregon Land Board, Division of
State Lands, and CWS permits and approvals shall be obtained;
The trail project is located above the top of bank of the Tualatin River and outside delineated wetland areas
located on the CWS-owned property. The trail alignment does not interfere with any wetlands or stream
Tualatin River Trail Sensitive Lands Permit Application Page 7 of 17
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channel. Therefore, no wetland permit is necessary from the U.S. Army Corps of Engineers or the Oregon
Department of State Lands. A required Service Provider Letter has been obtained for the project from
Clean Water Services (March 6, 2006, File #05-004508).
18.775.070 B 7. Where land form alterations and/or development are allowed within and adjacent to the
100-year floodplain, the City shall require the consideration of 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.
The project will be constructed on an open space area owned by Clean Water Services. This area is
undergoing restoration by the agency as a native oak savanna. The trail project carries out the city's adopted
pedestrian/bicycle pathway plan by installing a segment of the trail identified in the plan.
18.775.090: Special Provisions for Development within Locally Significant Wetlands and along the Tualatin
River, Fanno Creek, Ball Creek, and South Fork of Ash Creek
A. In order to address the requirements of Statewide Planning Goal 5 (Natural Resources) and the
safe harbor provisions of the Goal 5 administrative rule (OAR 666-023-0030) pertaining to wetlands,
all wetlands classified as significant on the City of Tigard "Wetlands and Streams Corridors Map"
are protected. No land form alterations or developments are allowed within or partially within a
significant wetland, except as allowed/ approved pursuant to Section 18.775.130.
The project does not include any development within a significant wetland. Wetland F-21 is mapped to the
south of the proposed trail alignment, and wetlands F-19 and F-26 are mapped to the north of the proposed
trail alignment on the City of Tigard "Wetlands and Streams Corridors Map". These wetlands were
delineated as part of the development of the Cook Park Master Plan. The trail alignment at its nearest
point is located 175 feet from F-26, the wetland closest to the trail alignment. According to Clean Water
Service maps, the required setback around the wetland is 50 feet. Therefore, this requirement is met.
B. In order to address the requirements of Statewide Planning Goal 5 (Natural Resources) and the
safe harbor provisions of the Goal 5 administrative rule (OAR 660-023-0030) pertaining to tiparian
corridors, a standard setback distance or vegetated corridor area, measured horizontally from and
parallel to the top of the bank, is established for the Tualatin River, Fanno Creek, Ball Creek, and
the South Fork of Ash Creek.
1. The standard width for "good condition" vegetated corridors along the Tualatin River is
75 feet, unless wider in accordance with CWS "Design and Construction Standards", or
modified in accordance with Section 18.775.130. If all or part of a locally significant wetland
(a wetland identified as significant on the City of Tigard "Wetlands and Streams Corridors
Map") is located within the 75-foot setback area, the vegetated corridor is measured from
the upland edge of the associated wetland.
Clean Water Services requires a 125-foot vegetated corridor adjacent. to the Tualatin River.
This exceeds the 75-foot corridor established under Goal 5. The majority of the 125-foot
vegetated corridor was determined to be in degraded or marginal condition according to
Clean Water Services standards. A portion of the vegetated corridor was determined to be
in good condition; however, the good condition area is less than 125 feet wide. The
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CUP2006-10001 /SLR2006-10002
applicant proposes to restore all substandard portions of the 125-foot corridor to good
condition. Minor encroachments into the vegetated corridor are proposed. No
encroachments are proposed in the portion of the vegetated corridor determined to be in
good condition. A natural resource assessment, a vegetated corridor restoration plan, and a
vegetated corridor mitigation plan related to the encroachments, all dated 10/21/2005, have
been approved by Clean Water Services (March 6, 2006, File #05-004508). Therefore, this
requirement is met.
2. The standard width for "good condition" vegetated corridors along Fanno Creek, Ball
Creek, and the South Fork of Ash Creek is 50 feet, unless wider in accordance with CWS
"Design and Construction Standards", or modified in accordance with Section 18.775.130. If
all or part of a locally significant wetland (a wetland identified as significant on the City of
Tigard "Wetlands and Streams Corridors Map") is located within the 50 foot setback area,
the vegetated corridor is measured from the upland edge of the associated wetland.
Not applicable. The site is not adjacent to Fanno Creek, Ball Creek or the South Fork of Ash
Creek.
3. The minimum width for "marginal or degraded condition" vegetated corridors along the
Tualatin River, Fanno Creek, Ball Creek, and the South Fork of Ash Creek is 50% of the
standard width, unless wider in accordance with CWS "Design and Construction
Standards", or modified in accordance with Section 18.775.130.
The majority of the vegetated corridor has been determined to be in degraded or marginal
condition based on Clean Water Services standards. Clean Water Services requires a 125-foot
vegetated corridor adjacent to the Tualatin River "where possible." If not possible, agency
standards allow a path to be located in the outermost 40% of the vegetated corridor. These
provisions exceed the 38-foot minimum width requirement contained in 18.775.130. Minor
encroachments into the degraded condition vegetated corridor are proposed to construct the
trail. The applicant proposes to enhance the corridor to good condition. A natural resource
assessment and vegetated corridor plan have been approved for the project by Clean Water
Services. Therefore, this requirement is met.
4. The determination of corridor condition shall be based on the Natural Resource
Assessment guidelines contained in the CWS "Design and Construction Standards".
The determination of the vegetated corridor condition is in accordance with Clean Water
Services Design and Construction Standards, Resolution and Order #04-9, March 2004.
The agency has issue a Service Provider letter (March 6, 2006, File #05-004508) based on an
approved Natural Resource Assessment and restoration plan.
5. The standard setback distance or vegetated corridor area applies to all development
proposed on property located within or partially within the vegetated. corridors, except as
allowed below:
Roads, pedestrian or bike paths crossing the vegetated corridor from one side to the other in
order to provide access to the sensitive area or across the sensitive area, as approved by the
City per Section 18.775.070 and by CWS "Design and Construction Standards";
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CUP2006-10001 /SLR2006-10002
Not applicable. The trail segment to be permitted and constructed by the City of Tigard will
not cross the vegetated corridor from one side to the other. At its western or Cook Park
end and for a distance of approximately 75 feet, the trail does cross into the vegetated
corridor in order to connect with the terminus of the existing Tualatin River trail segment.
This encroachment has been approved by CWS in the service provider letter noted above.
Utility/service provider infrastructure construction (i.e. storm, sanitary sewer, water, phone,
gas, cable, etc.), if approved by the City and CWS;
Not applicable. No infrastructure construction is proposed.
A pedestrian or bike path, not exceeding 10 feet in width and meeting the CWS "Design and
Construction Standards";
The path is 8 feet in width with 1 foot shoulders on either side and meets Clean Water
Services Design and Construction Standards.
Grading for the purpose of enhancing the vegetated corridor, as approved by the City and
CWS;
Not applicable. No grading within the vegetated corridor for enhancement purposes is
proposed.
Measures to remove or abate hazards, nuisances, or fire and life safety violations, as
approved by the regulating jurisdiction;
Not applicable. No such measures are included in the project work scope.
Enhancement of the vegetated corridor for water quality or quantity benefits, fish, or wildlife
habitat, as approved by the City and CWS;
Enhancement of the vegetated corridor is part of the project work scope. The proposed
enhancement is required by CWS standards, is not a stand-alone project, and is exempt.
g. Measures to repair, maintain, alter, remove, add to, or replace existing structures,
roadways, driveways, utilities, accessory uses, or other developments provided they are
consistent with City and CWS regulations, and do not encroach further into the vegetated
corridor or sensitive area than allowed by the CWS "Design and Construction Standards.
Not applicable to this project. No such measures are proposed.
6. Land form alterations or developments located within or partially within the Goal 5
safeharbor setback or vegetated corridor areas established for the Tualatin River, Fanno
Creek, Ball Creek, and the South Fork of Ash Creek that meet the jurisdictional
requirements and permit criteria of the CWS, U.S. Army Corps of Engineers, Division of
State Lands, and/or other federal, state, or regional agencies, are not subject to the
provisions of Section 18.775.090.B, except where the:
Tualatin River Trail Sensitive Lands Permit Application Page 10 of 17
CUP2006-10001 /SLR2006-10002
•
Land form alterations or developments are located within or partially within a good condition
vegetated corridor, as defined in Sections 18.775.090.B.1 and 18.775.090.B.2;
Not applicable. The proposed trail is not located within a good condition vegetated corridor. The
portion of the vegetated corridor affected by the project is in degraded condition.
Land form alterations or developments are located within or partially within the minimum width
area established for marginal or a degraded condition vegetated corridor, as defined in Section
18.775.090.B.3.
No encroachments within the Safeharbor "minimum width area of 38 feet of top of bank, as this
applies to the Tualatin River, are proposed.
FINDING: The trail is a conditional use within the residential zoning districts. The vegetated corridor proposal
meets the City and CWS site-specific standards established for vegetated corridors.
CONDITION: The applicant shat carry out the vegetated corridor plan as reviewed and approved by CWS.
18.790 TREE REMOVAL
A. Tree plan required. A tree plan for the planting, removal, and protection of trees prepared by a
certified areborist shall be provided for any lot, parcel or combination of lots or parcels for which a
development application for a subdivision, partition, site development review, planned development or
conditional use is filed. Protection is preferred over removal wherever possible.
B. Plan requirements. The tree plan shall include the following:
1. Identification of the location, size, and species of all existing trees including designation as
significant by the city;
2. Identification of a program to save existing trees or mitigate tree removal over 12 inches in caliper.
Mitigation must follow the replacement guidelines of Section 18.790.060D in accordance with the
following standards and shall be exclusive of trees required by other development code provisions
for landscaping, streets and parking lots:
a. Retention of less that 25% of existing trees over 12 inches in caliper requires a mitigation
program in accordance with Section 18.790.060D of not net loss of trees;
b. Retention of from 25% to 50% of existing trees over 12 inches in caliper requires that two-
thirds of the trees to be remove be mitigated in accordance with Section 18.790.060.D;
c. Retention of from 50% to 75% of existing trees over 12 inches in caliper required that 50%
of the trees to be removed be mitigated in accordance with Section 18.790.060D;
d. Retention of 75% or greater of existing trees over 12 inches in caliper requires no
mitigation.
3. Identification of all trees which are proposed to be removed.
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CUP2006-10001 /SL122006-10002
0 •
4. A protection program defining standards and methods that will be used by the applicant
to protect trees during and after construction.
C. Subsequent tree removal. Trees removed within the period of one year to a development
application listed above will be inventoried as part of the tree plan above and will be replaced
according to Section 18.790.060D.
All trees located within 40 feet of the trail route have been mapped. No trees over 12 inches in caliper are
proposed for removal. A tree protection plan prepared by a certified arborist has been submitted. The
plan conforms to the requirements of 18.790.030. It identifies the location, size, and species of all existing
trees over 6 inches in caliper, including trees designated as significant by the city. It.includes a program to
save existing trees over 12 inches in caliper. Also included is a protection program defining standards and
methods that will be used by the applicant to protect trees during and after construction.
Site vegetation in the proposed trail alignment consists predominantly of non-native grasses including
bentgrass, meadow foxtail and tall fescue. Enhancement of the vegetated corridor along the Tualatin River
has carried out by Clean Water Services within the last few years. Tree plantings within the southern and
western portions of the field closest to the Tualatin River included red alder, western red cedar, big-leaf
maple, Douglas fir and Oregon ash. Tree plantings further north and east from the river included Douglas
fir, big-leaf maple, Oregon white oak and ponderosa pine. The trail alignment has been located to minimize
impacts to recent enhancement plantings on the site. The locations of enhancement plantings in close
proximity to the proposed trail alignment in the west portion of the site were surveyed by the City of Tigard
and are shown on the construction drawings. Prior to the start of construction, 3 1-inch caliper
enhancement plantings located within the construction easement will be relocated outside the construction
corridor.
FINDING: Based on the above analysis, the Tree Removal standards will be met, if the applicant complies with
the condition listed below.
CONDITION: Provide a copy of the tree protection plan, which must be reviewed by the City Arborist, Matt
Stine. Tree protection must be installed and inspected by the City Arborist prior to site work.
D. IMPACT STUDY
Impact studies are required under 18.390.050 B.2.(e) Type III application types. The impact study criteria are listed
below, along with a discussion of how each applies to the project under discussion.
18.390.050 B.2(e) The impact study shall quantify the effect of the development on•public facilities and
services. The study shall address at minimum, the transportation system, including bikeways, the
drainage system, the parks system, the water system, the sewer system, and the noise impacts of the
development. For each public facility system and type of impact, the study shall propose improvements
necessary to meet City standards and to minimize the impact of the development on the public at large,
public facilities systems, and affect private property users.
Transportation system
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CUP2006-10001 /SLR2006-10002
Transportation system
The proposed trail project will not impact the transportation system. The proposed trail is not
located adjacent to any roadways.
Bikeways
Along with the 220-foot section permitted by the city of Tualatin, the proposed trail will fill the gap
between the Cook Park and Durham trail systems. The trail segment will result in increased
recreational opportunities for community residents and will provide access to Cook Park, Tualatin
Community Park, and Durham City Park.
Drainage system
The construction of the trail will result in an 8,520 square foot increase in impervious area on the
site. Stormwater runoff from the trail will flow into the vegetated corridor adjacent to the Tualatin
River. The vegetated corridor will provide treatment for runoff from the trail. No additional water
quality treatment or detention is proposed for trail runoff, because the increase in impervious
surface is small and no inputs of pollutants are anticipated. This is because the majority of trail users
will be pedestrians and bicyclists. Therefore, the trail is not expected to have a negative impact on
the drainage characteristics or water quality of the Tualatin River.
Parks system
The proposed trail will fill a gap in the trail network. The trail will result in improved recreational
opportunities for community residents and will provide access to Cook Park, Tualatin Community
Park and Durham City Park as well the greenway along the Tualatin River.
Water system
No water lines are located within the project alignment; therefore, the project will have no impact
upon the water system.
Sewer system
No sewer lines are currently located within the project alignment; therefore, the project will have o
impact upon the sewer system.
Clean Water Services has developed a plan to construct an outfall from the Durham Wastewater
Treatment Plant to the Tualatin River. The City of Tigard Engineering Department has coordinated
with Clean Water Services during the design of the Tualatin River trail project to ensure that
construction of the trail will not adversely impact future agency outfall projects.
Noise impacts of the development
Construction of the trail will result in a short-term increase in noise levels due to the presence of
construction equipment. The proposed trail is located approximately 0.25 mile from the nearest
residential neighborhood. It is unlikely that the construction noise will pose more than a very minor
temporary impact to nearby residents.
Regular use of the trail will have the usual low noise levels associated with similar sized recreational
facilities. Since the project area currently contains a dirt footpath that is regularly used for
recreational purposes, the project is not expected to result in an increase in noise over current levels.
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FINDING: The applicant has included an impact study that adequately addresses the project's impact on the
various pubic facility systems.
SECTION VI. OTHER STAFF COMMENTS
The City of Tigard Building Division and the Long Range Planning, Engineering, and Police
Departments have reviewed the project and have offered no objections to it.
The City of Tigard Public Works Department has reviewed the proposal and has provided the following
comments:
To avoid major detrimental impacts to existing mature trees, especially in the northwest portion of the project, the
trail should be built on top of the existing grade with geotextile fabric placed between the top of existing grade and
the base for the path/sidewalk. The same precautions should be implemented at the southern portion of the
project where the path goes along the northern boundary of mature trees.
Response:
Within the northwest of Cook Park portion of the path, only one mature tree, a 28-inch ash sited 14 feet from the
edge of path, is located within the vicinity of the trail. The next closest big tree, a 36-inch Douglas fir, is located
some 100 feet from the edge of path. Ash trees are known to have wide root bases. Some of the roots of the ash
tree in question may be damaged by the pathway construction. According to the technical specifications for the
project, one foot of excavation is required to install the trail. This includes 8 inches of base rock and 4 inches of
concrete. According to the Engineering Department, the alternative of placing the trail on top of existing grade
itself would require 6 inches of excavation or "stripping" in order to create a level surface. The conclusion
reached by the City Arborist is that some portion of the ash tree's root system could be damaged by the 1 foot of
excavation some 14 feet from the base of the ash tree. The tree under discussion is located 11 feet north of the
existing pathway to which the new pathway will connect. At its nearest point, the new pathway would be located
14 feet from the same tree.
Placing the trail on top of existing grade would result in fill in the floodplain, which would require an off-setting cut
elsewhere and certification by a registered professional engineer that the fill/cut will not result in any increase in
flood levels during the base flood discharge. Staff concludes that the Public Works Department recommendation
pertaining to placing the northwest path section on top of the existing grade is unduly burdensome.
The land underneath the proposed trail is owned by Clean Water Services, which also is the primary environmental
permit authority for the trail. The trail alignment was defined in the field by the CWS biologist, with the intent of
minimizing the trail's adverse impact on vegetation and stream water quality. The agency granted to the City an
easement for the trail's installation based on the biologist's recommendations. Two factors, the need to connect to
the terminus of the existing path and the physical limits imposed by the CWS easement, restrict the applicant's
options in dealing with potential damage to the ash tree. However limited, such options do exist and include use
of an air spade or some other non-harmful method of determining the presence and location of any major roots
within the proposed trail alignment, and, if feasible, altering the trail alignment within the easement area to minimize
root damage.
The project limits do not include the southern or eastern portion of the trail extending to the rail corridor. As
previously indicated, the present project (the project that is the subject of this application) will interconnected with a
proposed 22046ot section of the same trail that has been permitted through the City of Tualatin under a 2004
Tualatin River Trail Sensitive Lands Permit Application Page 14 of 16
CUP2006-10001 /SLR2006-10002
• •
Intergovernmental Agreement (IGA) that delegates to Tualatin the authority to review and approve permitting for
the 220 portion of the trial that lies within the City of Tigard. At its closest point, the path section presently under
review is located some 50 feet away from the grove of mature, mostly Douglas fir, trees referred to in the comment.
No root damage is likely from 1 foot of excavation at this distance.
FINDING: Construction of the trail could result in damage to the root systems of closeby trees.
CONDITION: Prior to site work, the applicant shall use an air spade or some other non-harmful method for
determining the presence and location of major tree roots within the trail alignment anywhere trees over 6
inches in caliper are located within 30 feet of the edge of pavement. Should any roots be detected, the
applicant shall consider altering the trail route within the boundaries of the easement area in order to
minimize root damage.
Section VII. AGENCY COMMENTS
Metro, Oregon Department of Fish and Wildlife, Clean Water Services, the City of Durham, Portland
Western R/R have reviewed the project and offered no comments.
No comments from any of the agencies contacted were received. As described elsewhere in this report, Clean
Water Services has reviewed earlier submittals related to this project.
Section VIII: PRIVATE ORGANIZATION AND CITIZEN COMMENTS
The Tualatin River Keepers, the Fans of Fanno Creek, CPO 4, owners of property within 500 feet of the
project, and interested parties were provided with copies of the project proposal and asked to provide comments.
Two private citizens offered comments.
Jeannot Whittle:
Please remember to place one or two seats along the path - it is difficult to sit on wet and muddy paths to remove
stones from shoes. A trash can or two would be an asset, carrying packaged animal excrement on a walk or jog is
not conducive to a pleasant day. Good luck with your efforts.
Response: The Parks Manager has indicated that park benches and trash containers will be placed along the path
following its completion.
David Baumgarten:
Do not use concrete! It is very bad to run on! Asphalt is much easier on the legs! Besides, the Durham Park trail is
asphalt, as are all other trails Qohnson Creek, Fanno Creek) in this metro area. Summary, use asphalt, not concrete,
to pave the trail.
Response: The decision to use concrete was based on the following considerations. The trail is anticipated to be a
high use facility. It will interconnect the major parks of Tigard, Durham, and Tualatin. Concrete has a much longer
life than asphalt. It has better durability and is easier to maintain. The city has experienced rutting and high
maintenance costs, in conjunction with the existing trail system, which primarily consists of asphaltic trails. Because
of its superior performance, the Engineering and Public Works Departments prefer to use concrete on this project.
Tualatin River Trail Sensitive Lands Permit Application Page 15 of 16
CUP2006-10001 /SLR2006-10002
• 0
Additionally, 1 foot of excavation, as opposed to 1 '/2 feet of excavation in the case of asphalt, would be required to
construct the trail. Thus, the use of concrete would result in reduced soil damage.
C \ April 14, 2006
PREPARED BY: D ane Rob its DATE
A sociat lanner
C~-~D'•
April 14. 2006
APPROVED BY: Richard Aewersdorff DATE
Planning Manager
Tualatin River Trail Sensitive Lands Permit Application Page 16 of 16
CUP2006-10001 /SLR2006-10002
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Date: February 27, 2006
To: Duane Roberts, Associate Planner, Long-Range Planning, City of Tigard
Dan Plaza, Parks & Facilities Division Manager, City of Tigard
Vannie Nguyen, Engineering Manager, City of Tigard
From: Stacy Benjamin, Senior Wetland Ecologist
Subject: Tualatin River Trail; City of Tigard Sensitive Lands Permit Application
INTRODUCTION
The City of Tigard is proposing to construct the Tualatin River Trail. The proposed trail will be constructed
to Clean Water Services trail width standards and will meet the Americans with Disabilities. Act guidelines.
The trail will serve the full range of recreational users, including bike riders, skaters, pedestrians, and
wheelchair users. The path will be an 8 foot wide concrete path with 1 foot gravel shoulders on each side,
for a total width of 10 feet from edge to edge including the gravel shoulders. The proposed trail segment to
be constructed by the City of Tigard is approximately 1,145 lineal feet. The finish elevation of the trail will be
at existing grade; therefore, construction will involve excavation and placement of the gravel base below
existing grade. The trail will be constructed of 4 inches of concrete over 8 inches of crushed rock.
The City of Tigard's proposed Tualatin River Trail will extend southeasterly from Cook Park to 220 feet west
of the Burlington Northern railroad trestle (Figure 1). The Tualatin River Trail has been identified on Metro
maps as part of a regionally significant trail system (the Fanno Creek Greenway Trail) that will connect the
Cities of Portland, Beaverton, Tigard, Durham and Tualatin through a 15-mile corridor extending from the
Willamette River to the Tualatin River (Figure 2). The Tualatin River Trail is a cooperative effort between
the Cities of Tigard, Tualatin and Durham and will provide a link between three large community parks:
Cook Park, Tualatin Community Park and Durham City Park. The trail will also provide a link between three
trail systems: the Tualatin River Trail, the Durham Park Trail and the Fanno Creek Trail. The City of
Tualatin will design, permit and construct the Tualatin River pedestrian bridge as well as design, permit and
rough grade the portion of the trail extending underneath the railroad trestle and continuing 220 feet west of
the trestle to connect with the section of trail to be constructed by the City of Tigard. The City of Tigard will
design and permit the segment of the trail beginning 220 feet west of the railroad trestle and connecting to
the existing trail stub at Cook Park (Figure 3). The approximate location of the proposed Tualatin River
pedestrian bridge is shown in Figure 1.
The trail will be constructed within the 100-year floodplain of the Tualatin River; therefore, a City of Tigard
Sensitive Lands Permit is required to be obtained for the project.
The project will also involve impacts to the Clean Water Services vegetated corridor on the site. A 125 foot
vegetated corridor is required by Clean Water Services adjacent to the Tualatin River, and a 50 foot
vegetated corridor is required adjacent to wetlands on the Durham Wastewater Treatment Plant site. A
natural resource assessment and vegetated corridor mitigation plan have been submitted to Clean Water
Services for the project.
EXISTING SITE CONDITIONS
The Portland office of SWCA Environmental Consultants (SWCA)l was contracted by the City of Tigard to
conduct a natural resource assessment for the Tualatin River Trail to meet Clean Water Services
requirements. Site vegetation along the proposed trail alignment consists predominantly of non-native
grasses including bentgrass, tall fescue and meadow foxtail. Enhancement of the vegetated corridor along
the Tualatin River was conducted by Clean Water Services within the last few years. Tree plantings noted
in the southern and western portions of the field closest to the Tualatin River included red alder, western
red cedar, big-leaf maple, Douglas fir and Oregon ash. Tree plantings noted further north and east from the
river included Douglas fir, big-leaf maple, Oregon white oak and ponderosa pine. Shrub- plantings were
present near the northern end of the trail alignment and included vine maple, snowberry and oceanspray.
Vegetated corridors are located both to the north and the south of the proposed trail alignment (Figure 3).
Emergent wetlands and their associated vegetated corridors are present to the north of the trail, and the
Tualatin River and its associated vegetated corridor is present to the south of the trail.
Veaetated Corridor to North of Trail
SWCA delineated wetlands on the Durham Wastewater Treatment Plant (WWTP) site in 2004. Two
wetlands were delineated on tax lot 100. The delineation has been concurred with by the Department of
State Lands (DSL WD #04-0590, dated February 16, 2005). Both wetlands are greater than 0.5 acre, and
the slope of the area adjacent to the wetland boundaries is less than 25%. Therefore, a 50 foot vegetated
corridor is required adjacent to the wetland boundaries. The distance between the proposed trail and the
outer edge of the vegetated corridor ranges from 125 to 350 feet; therefore, no impacts to the vegetated
corridor located adjacent to the wetlands on the WWTP site will occur as a result of this project.
Veaetated Corridor to South of Trail
SWCA conducted a site visit on July 19, 2005 to walk the proposed trail alignment and evaluate the
condition of the vegetated corridor adjacent to the Tualatin River. The stream banks of the Tualatin River
are steeply incised in the vicinity of the trail alignment. The topography of the area above the top of bank is
very flat; therefore, the vegetated corridor required by Clean Water Services extends 125 feet from the top
of bank of the Tualatin River. The location of the top of bank of the Tualatin River was mapped
approximately in the field based upon aerial photograph interpretation (Figure 3). Four vegetated corridor
communities are present adjacent to the Tualatin River. The majority of the vegetated corridor was
determined to be in degraded or marginal condition according to Clean Water Services standards due to
having less than 50% tree cover. A small area of the vegetated corridor adjacent to the east portion of the
1 The Portland, Oregon office of SWCA was acquired from Fishman Environmental Services in 2004.
Tualatin River Trail Sensitive Lands Permit Application Page 2
trail was determined to be in good condition according to Clean Water Services standards due to having
200% cover by native trees, shrubs and groundcovers and 80% tree cover.
ALTERNATIVES ANALYSIS
The trail alignment was determined during a site visit conducted by City of Tigard and Clean Water
Services staff. The location of the trail was determined by Clean Water Services (Kendra Smith), acting
both as the land owner and environmental permit authority. The City of Tigard had no role in determining
the alignment. The purpose of the site visit was to locate the trail to minimize vegetated corridor impacts
and to minimize impacts to enhancement plantings installed by Clean Water Services along the Tualatin
River. The City of Tigard has obtained a legal easement from Clean Water Services for the proposed trail
alignment.
The trail width as initially proposed was 12 feet; however, the trail width was reduced to 10 feet to minimize
impacts to the vegetated corridor adjacent to the Tualatin River and to meet Clean Water Services
requirements. The proposed trail will be constructed at existing grade to avoid any increase in the 100-year
flood elevation. In addition, an at-grade trail will minimize the potential of the trail to impact wildlife
movement from the Tualatin River riparian forest to wetlands on the Durham Wastewater Treatment Plant
site.
NATURAL RESOURCE PERMITTING
Vegetated Corridor
A natural resource assessment and vegetated corridor mitigation plan for the project have been submitted
to Clean Water Services. Encroachment into the vegetated corridor is proposed in the northwest and
southeast portions of the trail alignment. Encroachment is necessary in these two areas in order to connect
the new trail segment with existing trail segments. Construction of the trail will result in 6,036 square feet of
permanent vegetated corridor impact due to the 10 foot trail and shoulder width. The vegetated corridor
impact area is shown on Figure 3. The trail will impact vegetated corridor areas determined to be in
degraded condition that consist of non-native grass communities. No impacts are proposed to the portion of
the vegetated corridor determined to be in good condition according to Clean Water Services standards.
The trail alignment has been located to minimize impacts to recent enhancement plantings on the site. The
locations of enhancement plantings in close proximity to the proposed trail alignment in the west portion of
the site were surveyed by the City of Tigard and are shown on the construction drawings. Prior to the start
of construction, 3 enhancement plantings located within the construction easement will be relocated outside
of the construction corridor to avoid impacts.
The location of the top of bank of the Tualatin River was mapped approximately in the field based upon
aerial photograph interpretation. Since the location of the top of bank was not professionally land surveyed,
we estimate the map accuracy of the location of the top of bank and the 125 foot vegetated corridor to be
+l- 25 feet. For the purposes of calculating the proposed vegetated corridor impacts due to the trail, an
additional 25 feet has been added to the vegetated corridor width to take the map accuracy into account
and to avoid underestimating the proposed vegetated corridor impacts. This methodology for determining
vegetated corridor impacts for the project was approved by Clean Water Services during a pre-design
meeting on August 24, 2005.
Tualatin River Trail Sensitive Lands Permit Application Page 3
Clean Water Services stated that mitigation is required for the square feet of proposed encroachment into
the vegetated corridor due to the new trail, and mitigation is also required at a 1:1 ratio for the total square
feet of the trail project. Therefore, the total mitigation area is equal to the trail encroachment of 6,036
square feet plus the total trail area of 13,028 square feet, for a total of 19,064 square feet.
Mitigation proposed for the project includes removal of an existing hard-packed dirt footpath located in the
general vicinity of the proposed trail. The location of the existing dirt footpath was GPS-surveyed by SWCA
and is shown on Figures 3 and 4. The existing dirt trail has a total length of approximately 4,895.5 lineal
feet and averages 2 feet wide, for a total trail area of 9,791 square feet. The existing trail is mostly located
in the forested vegetated corridor adjacent to the Tualatin River. In the west portion of the project site, there
is a section of the existing dirt trail which is located within a few feet of the top of bank of the Tualatin River.
Removal of this existing trail will benefit wildlife use of the forested habitat area adjacent to the Tualatin
River by reducing reduce human disturbance of this area. Since the existing trail consists of compacted
soils, removal of the trail will consist of ripping the soil to loosen the soil and then the area will be seeded
with a native seed mix. Native trees and shrubs will be planted in areas where there is an opening in the
existing vegetation adjacent to the trail to be removed that would support establishment of new plants. The
mitigation plan has been submitted to Clean Water Services for their approval.
The total Clean Water Services mitigation requirement for the project is 19,064 square feet. Removal of the
existing dirt trail will provide 9,791 square feet of mitigation credit. Therefore the remaining mitigation area
is 9,273 square feet. This mitigation area will consist of enhancing the outer portion of the degraded
vegetated corridor in the southwest portion of the site. The condition of the vegetated corridor proposed to
be enhanced was documented to be degraded according to Clean Water Services standards. The
vegetated corridor mitigation area is shown on Figure 4. The mitigation plan has been submitted to Clean
Water Services for their approval.
Wetlands
No wetland or stream impacts are proposed for the trail segment to be constructed by the City of Tigard;
therefore, a wetland permit is not required for the project from the U.S. Army Corps of Engineers or the
Oregon Department of State Lands.
Citv of Tigard Sensitive Lands
The trail will be constructed within the 100-year floodplain of the Tualatin River; therefore, a City of Tigard
Sensitive Lands Permit is required to be obtained for the project.
This application is being submitted to the City of Tigard pursuant to the City of Tigard's Municipal Code,
Titles 18.330 "Conditional Use" and 18.775, "Sensitive Lands" and specifically addresses the code
provisions found in 18.330.030 "Approval Process", 18.330.040 "Additional Submission Requirements",
and 18.330.050 "Additional Development Standards for Conditional Use Types", 18.775.070 "Sensitive
Lands Permits", 18.775.090 "Special Provisions for Development within Locally Significant Wetlands and
along the Tualatin River, Fanno Creek, Ball Creek, and South Fork of Ash Creek", and 18.390.040B.2(e)
"Impact Study". Each of the City's code sections pertaining to the proposed project is addressed
independently below. Excerpts from the City of Tigard Municipal Code are italicized.
Tualatin River Trail Sensitive Lands Permit Application Page 4
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CONDITIONAL USE PERMIT APPLICATION NARRATIVE
Narrative Demonstrating Compliance with 18.330.050: Conditional Use:
18.330.030 Approval Standards and Conditions of Approval
A. Approval Standards. The Hearings Officer shall approve with conditions, or deny an
application for a conditional use or to enlarge or alter a conditional use based on findings of
fact with respect to each of the following criteria:
1. The site size and dimensions provide adequate area for the needs of the proposed use.
The site size and dimensions are adequate to accommodate a trail. Clean Water
Service standards relating to the installation of a trail within the riparian area have
been met.
2. The impacts of the proposed use of the site can be accommodated considering size,
shape, location, topography, and natural features.
This criterion is addressed under the Sensitive Lands section of this proposal.
3. All required public facilities have adequate capacity to serve the proposal.
No public facilities are affected by the trail.
4. The application requirements of the zoning district are met except as modified by this
chapter.
The zoning of the land through which the trail extends is R-4.5. Community
Recreation is a Conditional Use within this zoning district. No other
requirements of the district apply to this proposal.
5. The applicable requirements of 18.330.050.
The requirements contained in this section are addressed separately below.
6 The supplementary requirements set forth in other chapters of this code including but
not limited to Chapter 18.780, Signs, and Chapter 18.360, Site Development Review, if
applicable, are met.
No signs are included within this proposal. None of the supplementary
requirements of 18.360 apply to this proposal.
B. Conditions of approval. The Hearings Officer may impose conditions on the approval of a
conditional use, which are found necessary to ensure the sue is compatible with other use in the
Tualatin River Trail Sensitive Lands Permit Application Page 5
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vicinity, and that the impact of the proposed use on the surrounding uses and public facilities is
minimized. These conditions may include, but are not limited to the following:
1. Limiting the hours, days, place and/or manner of operation.
Park rules limit the use of outdoor recreation facilities to daylight hours. Other
use rules, such as those against littering and requiring the removal of dog waste,
also would apply.
2. Requiring design features which minimize environmental impacts such as noise,
vibration, air pollution, glare, odor andlor dust.
The environmental regulations applicable to this project are addressed elsewhere
in this proposal.
3. Requiring additional setback areas, lot area, and/or lot depth or width. .
Not applicable. The proposal does not create any new lots. Setbacks are address
under Sensitive Lands requirements and are addressed elsewhere in this proposal.
4. Limiting the building height, size or lot coverage, andlor location on the site
Not applicable. No buildings are proposed as part of this project.
5. Designating the size, number, location andlor design of vehicle access points.
Not applicable. The project does not include vehicular access.
6 Requiring street right-of-way to be dedicated and street(s)to be improved.
Not applicable.
7. Requiring landscaping, screening, drainage and/or surfacing of parking and loading
areas.
Not applicable. No loading areas are proposed.
8. Limiting the number, size, location, height andlor lighting of signs.
Not applicable. No signs are proposed.
9. Limiting or setting standards for the location and/or intensity of outdoor lighting.
Not applicable. No outdoor lighting is proposed.
Tualatin River Trail Sensitive Lands Permit Application Page 6
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10. Requiring berms, screening or landscaping and the establishment of standards for
their installation and maintenance.
Not applicable. No berms are proposed. Fill is prohibited within the floodplain
of land zoned for residential use. Natural area landscaping requirements are
addressed under the Sensitive Lands section of this proposal.
11. Requiring and designing the size, height, location and/or materials for fences.
Not applicable. No fencing is proposed.
12. Requiring the protection and preservation of existing trees, soils, vegetation,
watercourses, habitat areas andlor drainage areas.
The environmental impacts of the trail are addressed under the Sensitive Lands
section of this proposal.
13. Requiring the dedication of sufficient open land area for a greenway adjoining and
within the floodplain when land form alterations and development are allowed within the
100 year jloodplain.
The development proposed is a greenway trail. The land through which the trail
will travel is owned by Clean Water Services, which has provided an easement for
the trail .
14. Requiring the construction of a pedestrian/bicycle pathway within the floodplain in
accordance with the adopted pedestrianlbicycle pathway plan.
A pedestrian/bicycle trail is the subject of this proposal.
18.330.050 Additional Development Standards for Conditional Use Types
050-5. Community Recreation and Parks:
a. All building setbacks shall be a minimum of 30 feet from any property line.
Not applicable. The proposed project does not include the construction of any buildings.
b. There are no off-street parking requirements, except that five automobile parking
spaces are required for a dog park or off-leash area with a fenced area of one acre or
more
Not applicable. The proposed project does not include the construction of a dog park.
Tualatin River Trail Sensitive Lands Permit Application
Page 7
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Table 18.765.2 Minimum and Maximum Required Off-Street Vehicular and Bicycle Parking
Requirements: Community Recreation: Minimum: 2.0/1,000 sq ft. offloor area; Maximum:
4.0/1, 000 sq ft. of floor area; Bicycle: 0.3/1, 000 sq ft. of floor area.
Not applicable. The proposed project does not involve the construction of any
recreational or any other structures.
SENSITIVE LANDS PERMIT APPLICATION NARRATIVE
Narrative Demonstrating Compliance with 18.775: Sensitive Lands
18.775.070 B (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 section of the Tualatin River trail to be permitted and constructed by the City of Tigard has
been designed to avoid an increase in the zero-foot rise floodway. The finish elevation of the trail
will be at existing grade, and construction will involve excavation and placement of the gravel base
and trail below existing grade to avoid any net fill in the floodplain. The City of Tigard Engineering
Department has prepared a letter certifying that construction of the trail will not result in any
increase in flood levels during the base flood discharge.
The Tualatin River pedestrian bridge and the section of trail extending 220 feet west of the railroad
trestle has been permitted by the City of Tualatin and is therefore not included in this application.
The City of Tigard delegated the authority to review, approve and hear appeals for all design,
bidding, permitting and construction management for that portion of the trail located within the City
of Tigard to be constructed by the City of Tualatin. A flood study was conducted by the City of
Tualatin, and the project was designed to ensure that it would not result in any increase in the zero-
foot rise floodway. The bridge design and associated grading plan will ensure that the project will
not result any increase in flood levels during the base flood discharge.
18.775.070 B 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 18.120 of the Community Development Code shall be allowed in areas designated
residential subject to applicable zoning standards;
The proposed development is a trail for the purpose of community recreational use. The trail is a
conditional use on the site, which is zoned residential (R-4.5).
18.775.070 B 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;
Tualatin River Trail Sensitive Lands Permit Application Page 8
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The proposed trail is located within the 100-year floodplain. The grading plan will ensure that the
project does not result in any increase in the flood elevation. The finish elevation of the trail will be
at existing grade. Construction will involve excavation and placement of the gravel base and trail
below existing grade to avoid any net increase in fill to be placed in the floodplain.
18.775.070 B 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 development is a segment of the Tualatin River Trail designed in accordance with
the City's pedestrian/bicycle plan.
18.775.070 B 5. The plans for the pedestrian/bicycle pathway indicate that no pathway will be below the
elevation of an average annual flood,
The trail will be above the elevation of the average annual flood. The trail is located beyond the top
of bank of the Tualatin River which is above the elevation of the average annual flood.
18.775.070 B 6. The necessary U.S. Army Corps of Engineers and State of Oregon Land Board, Division
of State Lands, and CWS permits and approvals shall be obtained,
The section of the Tualatin River trail to be permitted and constructed by the City of Tigard is
located above the top of bank of the Tualatin River and outside delineated wetland areas on the
Durham Wastewater Treatment Plant site. No wetland or stream impacts are proposed; therefore,
a wetland permit is not required for the project from the U.S. Army Corps of Engineers or the
Oregon Department of State Lands. A Service Provider Letter has been obtained for the project
from Clean Water Services.
18.775.070 B 7. Where land form alterations and/or development are allowed within and adjacent to the
100-year floodplain, the City shall require the consideration of 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.
The project will be constructed on an open space area owned by Clean Water Services. This area
is planned for an upcoming native oak savanna restoration project by Clean Water Services. The
trail is located immediately adjacent to Cook Park and will provide access to the greenway corridor
along the Tualatin River as well as to the Tualatin Community Park and Durham City Park.
Narrative Demonstrating Compliance with 18.775.090: Special Provisions for Development within
Locally Significant Wetlands and along the Tualatin River, Fanno Creek, Ball Creek, and South Fork
of Ash Creek
A. In order to address the requirements of Statewide Planning Goal 5 (Natural Resources) and
the safe harbor provisions of the Goal 5 administrative rule (OAR 666-023-0030) pertaining to
wetlands. all wetlands classified as significant on the City of Tigard "Wetlands and Streams
Corridors Map" are protected. No land form alterations or developments are allowed within or
Tualatin River Trail Sensitive Lands Permit Application Page 9
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partially within a significant wetland, except as allowed/approved pursuant to Section
18.775.130.
The project does not propose any development within a significant wetland. Wetland F-21
is mapped to the south of the proposed trail alignment, and wetlands F-19 and F-26 are
mapped to the north of the proposed trail alignment on the City of Tigard "Wetlands and
Streams Corridors Map". The project does not propose any impacts within these mapped
wetlands.
B. In order to address the requirements of Statewide Planning Goal 5 (Natural Resources) and the
safe harbor provisions of the Goal 5 administrative rule (OAR 660-023-0030) pertaining to doarian
corridors, a standard setback distance or vegetated corridor area, measured horizontally from and
parallel to the top of the bank, is established for the Tualatin River, Fanno Creek, Bali Creek, and the
South Fork of Ash Creek.
1. The standard width for "good condition" vegetated corridors along the Tualatin River is
75 feet, unless wider in accordance with CWS "Design and Construction Standards", or
modified in accordance with. Section 18.775.130. If all or part of a locally significant
wetland (a wetland identified as significant on the City of Tigard "Wetlands and Streams
Corridors Map") is located within the 75-foot setback area, the vegetated corridor is
measured from the upland edge of the associated wetland.
Clean Water Services requires a 125 foot vegetated corridor adjacent to the
Tualatin River. The majority of the vegetated corridor was determined to be in
degraded or marginal condition according to Clean Water Services standards. A
portion of the vegetated corridor was determined to be in good condition; however,
the good condition area is less than 125 feet wide. A 125 foot vegetated corridor
will be maintained on the site. Minor encroachments into the vegetated corridor
are proposed to construct the trail. No encroachments are proposed in the portion
of the vegetated corridor determined to be in good condition. A natural resource
assessment and vegetated corridor mitigation plan was submitted to Clean Water
Services for proposed trail impacts to the 125 foot vegetated corridor. A Service
Provider Letter has been issued for the project by Clean Water Services.
2. The standard width for "good condition" vegetated corridors along Fanno Creek, Ball
Creek, and the South Fork of Ash Creek is 50 feet, unless wider in accordance with CWS
"Design and Construction Standards"; or modified in accordance with Section 18.775.130.
If all or part of a locally significant wetland (a wetland identified as significant on the City of
Tigard "Wetlands and Streams Corridors Map') is located within the 50 foot setback area,
the vegetated corridor is measured from the upland edge of the associated wetland.
Not applicable. The site is not adjacent to Fanno Creek, Ball Creek or the South
Fork of Ash Creek.
3. The minimum width for "marginal or degraded condition" vegetated corridors along the
Tualatin River, Fanno Creek, Ball Creek, and the South Fork of Ash Creek is 50% of the
Tualatin River Trail Sensitive Lands Permit Application Page 10
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standard width, unless wider in accordance with CWS "Design and Construction
Standards", or modified in accordance with Section 18.775.130.
Clean Water Services requires a 125 foot vegetated corridor adjacent to the
Tualatin River; therefore, the minimum width required by the City of Tigard is 62.5
feet for marginal or degraded condition vegetated corridors. The. majority of the
vegetated corridor was determined to be in degraded or marginal condition
according to Clean Water Services standards. Minor encroachments into the
degraded condition vegetated corridor are proposed to construct the trail;
however, a 125 foot vegetated corridor will be maintained on the site. A natural
resource assessment and vegetated corridor mitigation plan was submitted to
Clean Water Services for proposed trail impacts to the 125 foot vegetated corridor.
A Service Provider Letter has been issued for the project by Clean Water
Services.
4. The determination of corridor condition shall be based on the Natural Resource
Assessment guidelines contained in the CWS "Design and Construction Standards".
The determination of the vegetated corridor condition is in accordance with Clean
Water Services Design and Construction Standards, Resolution and Order #04-9,
March 2004.
5. The standard setback distance or vegetated corridor area applies to all development
proposed on property located within or partially within the vegetated corridors, except as
allowed below:
a. Roads, pedestrian or bike paths crossing the vegetated corridor from
one side to the other in order to provide access to the sensitive area or
across the sensitive area, as approved by the City per Section
18.775.070 and by CWS "Design and Construction Standards",-
Not applicable. The portion of the trail to be permitted and
constructed by the City of Tigard will not cross the vegetated
corridor from one side to the other.
The proposed pedestrian bridge over the Tualatin River has been
permitted by the City of Tualatin and is therefore not included in
this application. The City of Tigard delegated the authority to
review, approve and hear appeals for all design, budding,
permitting and construction management for that portion of the
trail located within the City of Tigard to be constructed by the City
of Tualatin.
b. Utility/service provider infrastructure construction (i.e. storm, sanitary
sewer, water, phone, gas, cable, etc.), if approved by the City and
CWS;
Tualatin River Trail Sensitive Lands Permit Application Page 11
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Not applicable.
C. A pedestrian or bike path, not exceeding 10 feet in width and meeting
the CWS "Design and Construction Standards";
The path is 10 feet in width and has been designed to meet Clean
Water Services Design and Construction Standards.
d. Grading for the purpose of enhancing the vegetated corridor, as
approved by the City and CWS;
Not applicable.
e. Measures to remove or abate hazards, nuisances, or fire and life safety
violations, as approved by the regulating jurisdiction;
Not applicable.
Enhancement of the vegetated corridor for water quality or quantity
benefits, fish, or wildlife habitat, as approved by the City and CWS;
Not applicable.
g. Measures to repair, maintain, alter, remove, add to, or replace existing
structures, roadways, driveways, utilities, accessory uses, or other
developments provided they are consistent with City and CWS
regulations, and do not encroach further into the vegetated corridor or
sensitive area than allowed by the CWS "Design and Construction
Standards.
Not applicable.
6. Land form alterations or developments located within or partially within the Goal 5
safeharbor setback or vegetated corridor areas established for the Tualatin River, Fanno
Creek, Ball Creek, and the South Fork of Ash Creek that meet the jurisdictional
requirements and permit criteria of the CWS, U.S. Army Corps of Engineers, Division of
State Lands, and/or other federal, state, or regional agencies, are not subject to the
provisions of Section 18.775.090.B, except where the:
a. Land form alterations or developments are located within or partially
within a good condition vegetated corridor, as defined in Sections
18.775.090. B.1 and 18.775.090. B. 2;
Not applicable. The proposed trail is not located within a good
condition vegetated corridor. The portion of the vegetated corridor
to be impacted by the project is in degraded condition.
Tualatin River Trail Sensitive Lands Permit Application Page 12
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b. Land form alterations or developments are located within or partially
within the minimum width area established for marginal or a degraded
condition vegetated corridor, as defined in Section 18.775.090.B.3.
The minimum required vegetated corridor width for the marginal
or degraded condition vegetated corridor is 62.5 feet (50% of 125
feet) from the Tualatin River. The trail proposes minor
encroachments within the minimum 62.5 foot vegetated corridor
at the northwest extent of the trail due to the need to connect the
new trail segment to the existing trail stub at Cook'Park.
These exceptions reflect instances of the greater protection of riparian corridors
provided by the safe harbor provisions of the Goal 5 administrative rule.
Narrative Addressing Chapter 18.390.040 B.2.(e): Impact Study
The impacts of the proposed project on public facilities and services are addressed below.
Transportation system
The proposed trail project will not impact the transportation system. The proposed trail is not
located adjacent to any roadways.
Bikeways
The proposed trail will connect to an existing trail segment at Cook Park and to the Durham Trail.
The trail will result in improved recreational opportunities for neighborhood residents and will
provide access to Cook Park, Tualatin Community Park and Durham City Park as well the
greenway along the Tualatin River.
Drainage system
The construction of the trail will result in a small increase in impervious area on the site. Stormwater
runoff from the trail will flow into the vegetated corridor adjacent to the Tualatin River: The vegetated
corridor will provide some water quality treatment for runoff from the trail. No water quality treatment or
detention is proposed for trail runoff since the increase in impervious surface is small, and no inputs of
pollutants are anticipated since trail users will consist of pedestrians and bicycles. The trail is not
expected to have a negative impact on the drainage characteristics or water quality of the Tualatin
River.
Parks system
The proposed trail will connect to an existing trail segment at Cook Park and to the Durham Trail.
The trail will result in improved recreational opportunities for neighborhood residents and will
provide access to Cook Park, Tualatin Community Park and Durham City Park as well the
greenway along the Tualatin River.
Tualatin River Trail Sensitive Lands Permit Application Page 13
Water system
No water lines are located within the project alignment; therefore, the project will not have any impact
upon the water system. The project will not result in an increase in the number of consumers of the
water system.
Sewer system
No sewer lines are currently located within the project alignment; therefore, the project will not have
any impact upon the sewer system. The project will not result in an increase in the number of
consumers of the sewer system.
Clean Water Services has a future planned project to construct an outfall from the Durham
Wastewater Treatment Plant to the Tualatin River. The City of Tigard Engineering Department has
coordinated with Clean Water Services during the design of the Tualatin River trail project to ensure
that construction of the trail will not adversely impact Clean Water Services future outfall project.
Noise impacts of the development
Construction of the trail will result in a short-term increase in noise levels due to the presence of
construction equipment. The proposed trail is located adjacent to Cook Park and may have a short-
term impact to park users. The proposed trail is located approximately 0.25 mile from the nearest
residential neighborhood, and it is unlikely that the construction noise will pose more than a very minor
temporary impact to nearby residents.
Regular use of the trail will have the usual low noise levels associated with similar sized recreational
facilities. Since the project area currently contains a dirt footpath that is regularly used for recreational
purposes, the project is not expected to result in a long-term increase in noise over current levels.
Narrative Demonstrating Compliance with Chapter 18.790: Tree Removal
Site vegetation in the proposed trail alignment consists predominantly of non-native grasses including
bentgrass, meadow foxtail and tall fescue. Enhancement of the vegetated corridor along the Tualatin River
was conducted by Clean Water Services within the last few years. Tree plantings noted in the southern and
western portions of the field closest to the Tualatin River included red alder, western red cedar, big-leaf
maple, Douglas fir and Oregon ash. Tree plantings noted further north and east from the river included
Douglas fir, big-leaf maple, Oregon white oak and ponderosa pine. The trail alignment has been located to
minimize impacts to recent enhancement plantings on the site. The locations of enhancement plantings in
close proximity to the proposed trail alignment in the west portion of the site were surveyed by the City of
Tigard and are shown on the construction drawings. Prior to the start of construction, 3 enhancement
plantings located within the construction easement will be relocated outside of the construction corridor to
avoid impacts. No trees will be removed for the trail project; therefore, no tree mitigation is required to meet
City of Tigard requirements.
c
Tualatin River Trail Sensitive Lands Permit Application Page 14
Map Features
Cook Park
Construction Easement
I ! Path
i Taxlots
City Boundary
Parks
I I Open Water
Streams
Streets
Railroad
Note: An additional 25 feet has been added to the vegetated
corridor to compensate for the estimated +/-25 ft map
accuracy of the location of the top of bank of the Tualatin
ity of Tigard River. The top of bank was mapped based on aerial
photograph interpretation.
Wa lands At Durham Wastewater
v.
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0 50100 200 300 ENVIRONMENTAL CON5ULTANTS
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ENVIRONMENTAL CONSULTANTS REGIONAL FANNO CREEK GREENWAY TRAIL MAP
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TGARD
Map Features
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MITIGAT~N SITE' . - 3 ; / Path
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Dera aowce: METRO RLIS, 2005. Photo. METRO, 2007. 8734-199 1 FEB 2006 1 FIGURE 3
N
Feet Tualatin River Trail I SWCA 0 50 100 200 300
ENVIRONMENTAL CONSULTANTS Vegetated Corridor Impacts
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.h Map Features
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Feet N
i.
0 25 50 100 150
Date source: METRO RLIS, 2005 Photo, BPS, 2002.
k.
SWC A Fanno Creek Trail -Cook Park to
Tualatin River Segment
ENVIRONMENTAL CONSULTANTS Vegetated Corridor Mitigation
8734-199 I NOV 2005 I FIGURE 4
INDEX OF SHEETS
1 LAYOUT - 1+00 TO 6+80
2 LAYOUT - 6+80 TO 12+60
3 LAYOUT - 12+60 TO 14+54.34
0
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® CALL 0601E 7011 OIC
1-800-JJ2-2344
CITY OF TIGARD
OREGON
PLANS FOR PROPOSED PROJECT
TUALATIN RIVER TRAIL
PAVED PATHWAY
FROM CONCRETE PATH TO RAILROAD TRE88EL
A
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VICINITY MAP
TO BE SUPPLEMENTED BY THE CITY OF TIOARD DESIGN STANDARDS DATED JULY 15. 1188
I I
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COOK PARK I I
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PRELIM/NARY
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CITY OF TIGARD
ENGINEERING DEPARTMENT
13125 S.W. HALL BLVD.
.O+
2
TIGARD. OREGON 97223
VOICE: 503-639-4171
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I
FAX: 503-624-0752
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CURVE DATA
Curve
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I PT ,+24.61 I I I I I
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1 12217177-46-24 I 7259 1 90
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,
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CITY OF TIGARD
ENgNEERING DEPARTMENT
TUALATIN RIVER TRAIL
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13125 S.W. HALL BLVD.
TIGARD, OREGON 97223
VOICE: 503-639-4171
I
CONCRETE PATH TO RAILROAD
_ _ _ _
-
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DATL 10t/a%/l01
PIIg_CT NO. 311
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FAX: 503-664-7297
WWW.CLTIGARD.oR.us
- -
LAYOUT 6 PROFILE -1+00 TO b80
SHEET
L1
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OF 3
HIGH POINT E[EV - 019.07
HMG/ POINT STA - 9+02.73
PN STA - 9+00
AD- -110
PRELIM/NARY
urn
DRAWING PLOT= AT
HALF THE NOTED SCALE
CURVE DATA
cume I~"I I A I T R PC 6+ O IPRC 7+58.98 I1'79'57 199-57-M I 92.28 80
O I PRC 9+869 I' 102.72 173-.73-55 I 59.81 I 80
C7 I PCC 9+Ai9~ II 84'0 180-13-57 I 50.55 I 57
O I P 10+30." + 8100 I IM-22-58 I 44.98 I 005
O IPT 11+5f.89 I IM87I 75-49-371 8231 I 80 I
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9+00
10+00
11+00
12+00
DATE I REN90n 1-1 - r - zo•
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CITY OF TIGARD
SHEET
T U A L A T I N RIVER TRAIL
I DrEmm
I I I _9aE9 Or. O [i a K"
.
ENONEERJNG DEPARTMENT
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13125 SW. HALL BLVD.
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CONCRETE PATH TO RAILROAD
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FAX- 503-884-7297
- WWW.CI.7IGARD.OR.US
LAYOUT a PROFILE - 6+80 To 12.20 OF
3
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DATE I REVMW I NQ I BY SCAIE: 1' 20'
I I I m 4emn++
I Q DE9o1m BY: R e XY1
I I I h DRAW, %1 Im, ®eA~ •
I I I I DNEam er, vTx iy r
I I I p DATE "/./.x
11L IODATION: R:\ERD~300]-20M rv GP\1UA41w RIWm PATILM I PRO[cT RD. 611
CURVE DATA
Curve l II (m I I tm I~
0 1 PRC 11+56.75 11 126.61127-17-28 1 65.55 1 270
PRC 121"
Il I ,,R, I, 45.36 1 67.90 119-27-08 1 3+.28 1 100
1 PTC 14+1,128 1 22'17 1111-06-37 I 11.16 1 200
NOIE
E,Wlhg grade as shown is grade of tMe of Wd.
Ad)oMMg pro)vatb contractor to ercowfed to grade as
shaven on porrds
CITY OF TIGARD
ENGINEERING DEPARTMENT
13125 S.W. HALL BLVD.
TIGARD, OREGON 97223
VOICE: 503-639-4171
FAX: 503-684-7297
WWW. CI.nGARD.OR.US
I PRELIMINARY II
serer nr Ar1er Ave eaeeNe
W WT YY nfT
D.enIM 3a 1D0.5
DRAWING PLOTTED AT
NALf THE NOTED SCALE I.
SHEET
TUALATIN RIVER TRAIL L3
CONCRETE PATH TO RAILROAD 3
LAYOUT 6 PROFILE - 0#80 TO 12.20 OF 3
1
MEMORANDUM
TO: Duane Roberts
FROM: Matt Stine, City Forester
RE: Cook Park Trail Extension
DATE: April 17, 2006
As you requested I have provided some comments on the "Cook Park Trail Extension"
project. If you have any questions or concerns regarding my comments please contact
me anytime.
18.745.030
E. Protection of Existina Landscapina. Existing vegetation on a site shall be
protected as much as possible: -
1. The developer shall provide methods for the protection of existing
vegetation to remain during the construction process; and
2. The plants to be saved shall be noted on the landscape plans. (e.g.,
areas not to be disturbed can be fenced, as in snow fencing which
can be placed around the individual trees).
Any tree that is located on property adjacent to the construction project that will have
more than 15% of its root system disturbed by construction activities shall also be
protected.
The applicant shall establish fencing as directed by the City Forester to protect the trees
to be retained. Failure to follow the plan, or maintain tree protection fencing in the
designated locations shall be grounds for immediate suspension of work on the site until
remediation measures and/or citations can be processed.
2. TREE REMOVAL
18.790.030, Tree Plan Reauirement
A. Tree plan reauired. A tree plan for the planting, removal and protection of
trees prepared by a certified arborist shall be provided for any lot, parcel or
combination of lots or parcels for which a development application for a
subdivision, partition, site development review, planned development or
conditional use is filed. Protection is preferred over removal wherever
possible.
As required, the applicant submitted a tree plan (dated April 1, 2006) conducted by Kay
Kinyon, certified arborist.
B. Plan requirements. The tree plan shall include the following:
1. Identification of the location, size and species of all existing trees
including trees designated as significant by the city,
The Arborist Report identified the location, size and species of all existing trees,
consistent with this standard.
2. Identification of a program to save existing trees or mitigate tree
removal over 12 inches in caliper. Mitigation must follow the
replacement guidelines of Section 18.790.060D, in accordance with the
following standards and shall be exclusive of trees required by other
development code provisions for landscaping, streets and parking lots:
a. Retention of less than 25% of existing trees over 12 inches in caliper
requires a mitigation program in accordance with Section _
18.790.060D of no net loss of trees; _
b. Retention of from 25% to 50% of existing trees over 12 inches in
caliper requires that two-thirds of the trees to be removed be
mitigated in accordance with Section 18.790.060D;
c. Retention of from 50% to 75% of existing trees over 12 inches in
caliper requires that 50 percent of the trees to be removed be
mitigated in accordance with Section 18.790.060D;
d. Retention of 75% or greater of existing trees over 12 inches in caliper
requires no mitigation.
No trees are going to be removed as part of this project so tree mitigation is not
required.
3. Identification of all trees which are proposed to be removed,
No trees are going to be removed as part of this project.
4. A protection program defining standards and methods that will be used
by the applicant to protect trees during and after construction.
The guidelines for tree protection are outlined below under "Conditions of Approval".
D
I
FJ
18.790.040 Incentives for Tree Retention
B. Subsequent removal of a tree. Any tree preserved or retained in accordance
with this section may thereafter be removed only for the reasons set out in a tree
plan, in accordance with Section 18.790.030, or as a condition of approval for a
conditional use, and shall not be subject to removal under any other section of
this chapter. The property owner shall record a deed restriction as a condition of
approval of any development permit affected by this section to the effect that
such tree may be removed only if the tree dies or is hazardous according to a
certified arborist. The deed restriction may be removed or will be considered
invalid if a tree preserved in accordance with this section should either die or be
removed as a hazardous tree. The form of this deed restriction shall be subject to
approval by the Director.
A condition of approval will ensure that this standard is met.
CONDITIONS OF APPROVAL
Meetings
Prior to any site clearing or construction, a meeting shall take place onsite with the
general contractor in charge of site clearing and the City Forester.
The purpose of these meetings will be to introduce the parties involved to the
specifications and sensitivity needed for the protection and preservation of trees onsite
and offsite as well as their growing environment.
Tree Protection
Prior to any site work the applicant shall install all proposed tree protection fencing. The
fencing shall be inspected and approved by the City Forester prior to commencing any
site work. The tree protection fencing shall remain in place through the duration of all of
the building construction phases.
Tree protection fencing shall be placed away from the trees' trunks at a rate of one foot
for every inch of diameter. For example, a 20 inch diameter tree must have at least a
20 foot radius zone of protection. If any construction activities occur within the tree's
root protection areas the City Forester must oversee the work being done. Any area
that will be graded must first be air-spaded in order to see the root system. If the City
Forester determines that too many large roots will be cut or the required work will be
harmful to the tree(s) then alternatives must be explored such as modifying the location
of the path or building the trail on top of existing grade with geotextile fabric as the
underlayment.
•
TREE ASSESSMENT
April 17, 2006
City of Tigard
RE: Cook Park Path
Tigard, OR
Common Name
I Specie
I DBH
I Condition
001
Oregon Ash
Fraxinus latifolia
33
Good
002
Grand Fir
I Abies grandis
123
I Poor
003
I Biq Leaf Maple
Acer macrophyllum
10
Poor
004
Big Leaf Maple
I Acer macrophyllum
8
I Poor
005
Big Leaf Maple
Acer macrophyllum
19
1 Poor
006
I Oreqon Ash
Fraxinus latifolia
10
Very Poor
007
I Hawthorne
Crataegus
111
I Fair
008
Oregon Ash
Fraxinus latifolia
12
Fair
009
Oregon Ash
I Fraxinus latifolia
16
Fair
010
Western Red Cedar
Thuja plicata
J 32
Good
011
Oregon White Oak
I Quercus garryana
135
Good
012
Big Leaf Maple
Acer macrophyllum
19
Very Poor
013
Oregon White Oak
I Quercus garryana
134
1 Good
014
Douglas Fir
Pseudotsuga menziesii
16
Very Poor
015
Willow
Salix
16
Fair
016
Hawthorne
Crataegus
6
Fair
017
Red Alder
Alnus oregona
16
Fair
018
Red Alder
Alnus oregona
10
Fair
019
Red Alder
Alnus oregona
11
Fair
020
Red Alder
Alnus oregona
9
Fair
0
Height/Additional Comments
70', mature
70', dead top, roots undermined
30', roots undermined
20', roots undermined
20', 2 stems: 6,7, undermined
30', dead top
140'
40'
40'
60'
70'
25', broken top, trunk decay
60'
25', undermine, not tagged,
waters edge
25', undermined, waters edqe
20'
30', undermined, leans, not
tagqed, waters edge
30', undermined, leans, not
tagged, waters edge
30', undermined, leans, not
tagqed, waters edge
30', undermined; leans, not
tagqed, waters edqe
Common Name
021
Red Alder
022
I Red Alder
023
Hawthorne
024
Red Alder
025
Big Ldaf Maple
026
Apple
027
Red Alder
028
Red Alder
029
Douglas Fir
030
Red Alder
031
Oregon Ash
032
1 Cherry
033
I Big Leaf Maple
034
Big Leaf Maple
035
1 Big Leaf Maple
036
I Douglas Fir
037
I Douglas Fir
038
I Oreaon Ash
039
I Oregon White Oak
040
1 Oregon White Oak
041
1 Douglas Fir
042
I Douglas Fir
043
1 Douglas Fir
044
I Douglas Fir
045
I Douglas Fir
046
1 Douglas Fir
047
I Douglas Fir
048
1 Douglas Fir
049
1 Douglas Fir
050
1 Douglas Fir
051
1 Douglas Fir
052
I Douglas Fir
053
1 Big Leaf Maple
054
I Douglas Fir
055
I Douglas Fir
0
Specie
Alnus oregona
I Alnus oregona
Crataegus
Alnus oregona
Acer macrophyllum
Malus
Alnus oregona
Alnus oregona
Pseudotsuga menziesii
Alnus oregona
Fraxinus latifolia
1 Prunus
1 Acer macrophyllum
Acer macrophyllum
•
DBH I Condition I Height, Additional Comments
16
Fair
30', undermined, leans, not
tagged, waters edge
7
I Good
125'
6
Poor
30', undermined, leans, not
tagged, waters edge
17
Fair
30', undermined, leans, not
tagged, waters edge
12
Fair
30', undermined, leans, not
tagged, waters edge
10
Fair
30', undermined, leans, not
tagged, waters edge
29
Fair
35', 2 stems: 23,18, undermined,
not tagged, waters edge
16
Fair
30', undermined, leans, not
tagged, waters edge
26
Fair
40', 3 stems: 16,17,12,
undermined, not tagged, waters
edge
11
Poor
40', dead top, undermined, leans,
not tagged, waters edge
9
Poor
30', dead top, undermined, not
tagged
17
1 Good
1 30'
7
1 Fair
120', undermined
12
Very Poor
20', 2 stems: 9,8, broken top,
trunk decay
Acer macrophyllum 1 6
I Good
120'
Pseudotsuga menziesii 125
I Good
180'
Pseudotsuga menziesii 124
I Good
180'
Fraxinus latifolia 1 17
I Poor
1 60', mature
Quercus garrvana 1 12
1 Good
150'
Quercus garryana 112
1 Good
150'
Pseudotsuga menziesii 19
I Poor
140', suppressed
Pseudotsuqa menziesii 18
Poor
140', broken top, suppressed
Pseudotsuga menziesii 1 14
Fair
160', high crown
Pseudotsuga menziesii 26
I Good
1 80', 2 stems: 9,26
Pseudotsuga menziesii 12
I Fair
150', 2 stems: 10.,7
Pseudotsuga menziesii 1 11
I Fair
150'
Pseudotsuga menziesii 17
I Poor
135', broken top, suppressed
Pseudotsuga menziesii 1 7
1 Poor
140', broken top, suppressed
Pseudotsuga menziesii 125
I Good
1 80'
Pseudotsuqa menziesii 112
I Poor
140', broken top
Pseudotsuga menziesii 115
I Good
180'
Pseudotsuga menziesii 1 42
I Good
1100'
Acer macrophyllum 1 21
1 Good
170'
Pseudotsuga menziesii 1 10
1 Fair
140', suppressed
Pseudotsuga menziesii 18
I Poor
130', broken top, suppressed
Common Name
I Specie I DBH
I Condition
I Height, Additional Comments
056
I Douglas Fir
I Pseudotsuga menziesii 110
I Poor
140', broken top, suppressed
057
I Big Leaf Maple
I Acer macrophyllum 123
I Good
170'
058
I Douglas Fir
I Pseudotsuga menziesii 113
I Good
170'
059
I Big Leaf Maple
Acer macrophyllum 10
Fair
150'
060
I Grand Fir
I Abies grandis 18
Good
125'
061
I Douglas Fir
I Pseudotsuga menziesii 14
I Good
70'
062
I Grand Fir
I Abies grandis 17
I Fair
120'
063
I Western Red Cedar
Thuja plicata 20
Good
160'
064
I Douglas Fir
I Pseudotsuga menziesii 137
I Good
1100'
065
I Douglas Fir
I Pseudotsuqa menziesii 136
I Good
100'
066
I Douglas Fir
I Pseudotsuga menziesii 137
I Good
1100'
067
I Douglas Fir
I Pseudotsuga menziesii 115
I Fair
150'
068
I Grand Fir
I Abies qrandis 124
I Good
180'
069
I Big Leaf Maple
I Acer macrophyllum 119
I Fair
155'
070
I Big Leaf Maple
I Acer macrophyllum 17
I Poor
25'
071
I Western Red Cedar
I Thuja plicata 118
I Good
145'
072
I Douglas Fir
I Pseudotsuga menziesii 139
I Good
1100', root legs
073
I Western Red Cedar
I Thuja plicata 12
I Poor
120', broken top
074
I Douglas Fir
I Pseudotsuga menziesii 35
1 Fair
1100', broken top, dieback in crown
075
I Western Red Cedar
I Thuja plicata 120
I Poor
145', dead top, dieback in crown
076
Douglas Fir
Pseudotsuga menziesii 16
Very Poor
60', hazard, leans 30 degrees,
uproot
077
I Douglas Fir
I Pseudotsuga menziesii 118
I Poor
160', dieback in crown
078
I Big Leaf Maple
I Acer macrophyllum 123
I Good
170'
079
I Douglas Fir
I Pseudotsuga menziesii 122
I Fair
170'
080
I Douglas Fir
I Pseudotsuga menziesii 136
I Good
1110'
081
I Big Leaf Maple
I Acer macrophyllum 117
I Good
160'
082
I Big Leaf Maple
I Acer macrophyllum 122
I Good
( 70'
083
I Big Leaf Maple
I Acer macrophyllum 112
I Fair
160', 2 stems: 11,6
084
Douglas Fir
Pseudotsuga menziesii 46
Poor
90', 2 stems: 32,9, 32" stem is
dead
085
I Big Leaf Maple
I Acer macrophyllum 125
I Fair
70', leans N
086
I Douglas Fir
I Pseudotsuga menziesii 126
I Good
1100'
087
I Doualas Fir
I Pseudotsuqa menziesii 116
I Fair
180', broken top
088
I Douglas Fir
I Pseudotsuga menziesii 136
I Good
1110'
089
I Grand Fir
I Abies grandis 19
I Fair
120'
090
I Douglas Fir
I Pseudotsuga menziesii 125
I Good
1100'
091
I Douglas Fir
I Pseudotsuga menziesii 129
I Good
1100'
092
I Western Red Cedar
I Thuja plicata 116
I Good
145'
093
Big Leaf Maple
Acer macrophyllum 33
Poor
70', 3 stems: 20,19,20, 19" stem
is dead, dieback in crown
094
I Western Red Cedar
I Thuja plicata 113
I Good
145'
095
I Western Red Cedar
Thuja plicata 1 15
1 Good
140'
096
I Biq Leaf Maple
Acer macrophyllum 127
I Fair
160', 4 stems: 8,15,14,16
097
I Western Red Cedar
I Thuja plicata 113
I Poor
140', thin crown
098
Big Leaf Maple
Acer macrophyllum 22
Very Poor
75', 18"x36" cavity above ground
level W side
Common Name
I Specie
I DBH
I Condition
099
Big Leaf Maple
Acer macrophyllum
27
Very Poor
100
I Western Red Cedar
I Thuja plicata
112
I Poor
101
I Western Red Cedar
Thuja plicata
120
1 Fair
102
I Western Red Cedar
I Thuja plicata
17
I Fair
103
Douglas Fir
Pseudotsuga menziesii
36
Poor
104
I Grand Fir
I Abies qrandis
17
I Poor
105
I Douglas Fir
I Pseudotsuqa menziesii
1 6
I Poor
106
I Big Leaf Maple
I Acer macrophyllum
115
Poor
107
I Douglas Fir
I Pseudotsuga menziesii
139
I Good
108
I Pacific Dogwood
I Cornus nuttallii
17
Good
109
Big Leaf Maple
Acer macrophyllum
17
Very Poor
110
I Big Leaf Maple
I Acer macrophyllum
116
I Fair
111
I Big Leaf Maple
I Acer macrophyllum
115
I Fair
112
I Big Leaf Maple
I Acer macrophyllum
116
I Good
113
I Western Red Cedar
I Thuja plicata
128
I Good
114
I Oregon Ash
I Fraxinus latifolia
130
I Poor
115
Oregon Ash
Fraxinus latifolia
19
Poor
116
I Big Leaf Maple
I Acer macrophyllum
124
I Fair
117
I Big Leaf Maple
I Acer macrophyllum
122
I Fair
118
Oregon Ash
Fraxinus latifolia
23
Very Poor
119
Oregon Ash
I Fraxinus latifolia
127
I Very Poor
120
I Douglas Fir
I Pseudotsuqa menziesii
136
I Good
121
I Big Leaf Maple
I Acer macrophyllum
130
I Good
122
I Big Leaf Maple
I Acer macrophyllum
117
I Good
123
I Big Leaf Maple
I Acer macrophyllum
134
Very Poor
124
Big Leaf Maple
Acer macrophyllum
23
Poor
125
Big Leaf Maple
Acer macrophyllum
28
j
Poor
126
I Big Leaf Maple
I Acer macrophyllum
119
I Fair
127
I Douglas Fir
I Pseudotsuga menziesii
151
I Fair
128
I Douglas Fir
I Pseudotsuqa menziesii
110
I Poor
129
I Oregon Ash
I Fraxinus latifolia
18
I Fair
130
I Oregon Ash
I Fraxinus latifolia
116
I Fair
131
I Oregon Ash
I Fraxinus latifolia
17
Very Poor
132
I Oregon Ash
I Fraxinus latifolia
18
I Fair
133
Oregon Ash
Fraxinus latifolia
27
Very Poor
134
I Oreqon Ash
I Fraxinus latifolia
116
I Fair
135
I Biq Leaf Maple
I Acer macrophyllum
116
I Fair
136
I Red Alder
I Alnus oreaona
122
I Poor
r~
Height, Additional Comments
90', 30"x4' cavity from ground
level E side
70', 2 stems: 9,16, stem is hollow
80'
18'
100', conks at 11', 15'& 21' above
ground level S side
20', thin crown, suppressed
20'
40', leans N
110'
30'
40', trunk broke at 40' above
ground level
80'
70', epicormics
60'
80'
90', decay & failure N scaffolds
15', broken off at 15' above
qround level
60', 2 stems: 22,10
60', 2 stems: 20,10
70', 30"x18" cavity at ground level
E side
90', leans on #116, uprooted
120'
90', 2 stems: 17, 25
60'
70', over mature, cavities
70', 2 stems: 15,18, 18" stem
broken off at 20' above ground
level
60', 2 stems: 18,20, scaffold
failure
60'
110'
20', suppressed
80', mature
70', mature
30', dead top
60', 2 stems: 14,12
40', Habitat tree, trunk broken off
at 40' above ground level
60'
50'
50' dead top
1 Common Name
I Specie
I DBH
I Condition
I Height, Additional Comments
137
Red Alder
Alnus oregona
17
Very Poor
50', 12"x15' cavity from ground
level S side
138
Red Alder
Alnus oregona
24
Very Poor
20', Habitat tree, 24"x12' cavity
from ground level S side
139
I Big Leaf Maple
1 Acer macrophyllum
J 28
1 Fair
70', 2 stems: 20,20, over mature
140
I Oregon Ash
I Fraxinus latifolia
1 23
I Fair
1 70', 2 stems: 22,7, mature
141
I Big Leaf Maple
I Acer macrophyllum
1 10
1 Fair
1 25'
142
1 Big Leaf Maple
I Acer macrophyllum
19
1 Fair
1 50'
143
I Big Leaf Maple
1 Acer macrophyllum
1 15
1 Fair
1 50'
144
I Big Leaf Maple
1 Acer macrophyllum
1 17
1 Fair
1 70'
145
I Big Leaf Maple
1 Acer macrophyllum
1 23
1 Poor
1 80', 3 stems: 13,10,16
146
1 Big Leaf Maple
I Acer macrophyllum
J 18
1 Poor
1 80', 2 stems: 10,15
147
I Big Leaf Maple
1 Acer macrophyllum
1 15
1 Very Poor
1 80', basal decay
148
I Big Leaf Maple
1 Acer macrophyllum
1 10
1 Fair .
1 30', broken top
149
Big Leaf Maple
Acer macrophyllum
22
Very Poor
60', 2 stems: 19,11, 12"00'
cavity S side
150
1 Oregon Ash
1 Fraxinus latifolia
1 11
J Fair
60
151
1 Oregon Ash
1 Fraxinus latifolia
1 18
1 Fair
:
1 70'
152
I Oregon Ash
1 Fraxinus latifolia
1 11
I Fair
1 30'
153
I Oregon Ash
I Fraxinus latifolia
1 18
1 Good
1 80'
154
1 Apple
1 Malus
1 7
Fair
1 20'
155
I Oreqon Ash
I Fraxinus latifolia
1 10
1 Fair
1 60'
156
1 Douglas Fir
1 Pseudotsuga menziesii
18
1 Good
1 30'
157
I Grand Fir
I Abies qrandis
17
I Fair
125
158
I Oreqon Ash
Fraxinus latifolia
1 13
Good
1 70
159
I Oreqon Ash
1 Fraxinus latifolia
1 17
1 Poor
1 50', 2 stems: 13,11
160
1 Oregon Ash
1 Fraxinus latifolia
1 6
1 Good
1 20'
161
1 Cascara
1 Rhamnus purshiana
1 8
I Poor
1 30', decay
162
I Big Leaf Maple
1 Acer macrophyllum
1 11
1 Fair
50'
163
I Biq Leaf Maple
1 Acer macrophyllum
1 16
I Good
1 70'
164
1 Big Leaf Maple
1 Acer macrophyllum
1 18
1 Good
1 70'
165
1 Oregon Ash
1 Fraxinus latifolia
1 25
1 Fair
1 50', 6 stems: 7,19,12,10,14,6
166
Big Leaf Maple
Acer macrophyllum
28
Very Poor
50', 3 stems: 18,17,14, basal
decay, broken top
167
Douglas Fir
Pseudotsuga menziesii
33
Good
40', Broken top @ 40' above
ground level
Respectfully,
Kay Kinyon
Certified Arborist #PN0409
Tree Care & Landscapes Unlimited, Inc.
0
•
Tree Protection Plan
REVISED 7/27/05
SITE ADDRESS e PA elL
Follow the below listed instructions in order to provide the proper protection before, during and after
construction for tree # / TAN /rn7
I. Before Construction:
App. Non-App.
156 ❑ a. Identify and number the trees'to be protected, verify by mapping and/or tagging and note their
size in D.B.H. (Diameter at Breast Height), variety, health and structural conditions, review
plans.
PQ ❑ b. Check with local government agencies for tree protection ordinances.
g0' ❑ c. Remove any low limbs that may be in the way of construction equipment, and prune as needed
to adhere NAA standards.
g ❑ d. Leave a protective covering on the soil, i.e., existing groundcover or mulch.
A ❑ e. Notify all other contractors that these trees are to be saved and protected.
❑ f. Install a temporary 6' high metal no-climb fence to protect the trees and their root systems.
Install tree protection sign on fence. Posts located 10' on center as a general rule. For every
inch in diameter of the trunk (D.B.H.) allow up to 1 foot of radius from the trunk as the
protected area. (Example: 24" D.B.H. = 24' radius of protected root system.) Ideally, we
need to protect more than the drip zone. The drip zone into the trunk is the support roots that
hold the tree up. The roots from that drip zone out provide nutrition, water and oxygen. Try to
avoid loss of more than 30% of root on any one side. This allows some encroachment within
the drip line. This should be determined on a case by case site conditions reviewed. (SEE
ENCLOSED SITE PLAN)
1$I ❑ g. Identify any insect or disease problems that may require treatment.
❑ h. Engineer and design proposed structures and construction to avoid root loss. Bridge type
foundations can save major roots.
❑I i. Design landscape islands and planting areas large enough to accommodate trees at maturity.
❑ j. Plant the right tree in the right place. Avoid future conflicts with buildings and utilities.
❑ k. Have an experienced Arborist review landscape plan to assure the right tree is planted in the
right place and proposed changes don't kill retained mature trees.
❑ % I. Consider tree removals adjacent to trees to be saved for wind related stability concerns.
Residential and Commercial Spraying • Fertilizing • Pruning • Landscape Installation • Landscape Maintenance • Consultation
MEMBER: National Arborist Association • International Society of Arboriculture • Oregon Association of Nurserymen .
Oregon Golf Course Superintendents' Association • Oregon Landscape Contractors Association
State Licensed Tree Service #62635 • Landscape Contractor #5659 • Chemical Application #000231 • Insured
P.O. Box 1566 ° Lake Oswego, OR 97035 • 503-635-3165 • Vancouver 360-737-2646 • FAX 503-635-1549
Visit our website at www.treecarelandscapes.com
App Non-App
•
❑ m. Check for past and proposed grade and drainage changes, consider the effects.
❑ n. Check trees for stability.
❑ o. Remove all trees that would not survive the effects of change. Remove all hazardous trees.
❑ p. Minimize environmental changes.
II. During Construction:
❑ a. Keep equipment off of the root system to avoid compaction.
❑ b. Keep equipment away from structure to prevent damage to trunk and limbs.
❑ c. Don't allow chemicals to be dumped on the ground near the tree, i.e., gasoline, diesel, paint,
herbicide, cleaner, thinners, etc.
❑ d. Provide means of temporary irrigation if the project runs through the summer.
❑ e. If roots or limbs are cut or damaged, have them inspected by an ISA Certified Arborist and
repaired or treated according to his/her recommendations.
❑ f. Protect the trees from excessive heat, i.e., equipment, paving and/or burning.
❑ g. Avoid trenching through the root systems, boring under them or hand digging can save roots.
❑ h. Contact the ISA Certified Arborist familiar with the site prior to and during any activity within
the drip zone or tree protection fencing for consultation.
III. After Construction:
❑ a. Carefully landscape the area under the tree, being careful of the roots and structure. Use
plantings that will live under the same conditions as that of the tree.
❑ gQ b. Provide insect and disease control, fertilization and pruning as needed or adhere to long-term
protection plan if provided.
❑ c. Avoid direct irrigation spraying onto the trunk. The amount of irrigation needed to keep new
plantings alive can often be enough to kill mature trees.
❑ d. Do not cover existing root systems with more than 2" of soil. The more soil you add, the
greater the chances of damaging the root system.
❑ e. Provide irrigation and/or drainage to emulate pre-construction conditions.
NOTE: This tree protection plan identifies construction protection measures to prevent unwarranted tree loss.
The identified measures limit the amount of earth disturbance surrounding the trees, and limit the removal of
the tree's root systems. Due to the variation of every project, it is unlikely all of the above identified
measures can be practicably applied to each individual tree; nor is it likely each measure is necessary to
retain each tree. Prior to the beginning of construction a meeting between a certified arborist and the
necessary contractors will be held to determine the appropriate level of protection for each tree, in relation to
what work needs to be completed in the tree's vicinity. On site supervision by a certified arborist will be
determined and supplied as necessary.
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