Report / 00335
:� /5 30 S So/ /53RD /WE_ • a
File Number
CleanWater Services SEP 2 2 2005 3793
Our commitment is clear.
Clean Water Services
CITY OF TIGARD Service Provider Letter
Jurisdiction Washington County BUILDING DIVISION September 21, 2005
Map & Tax Lot 2S108AB 01000 Owner
Site Address 15305 SW 153rd Av Applicant JONES & STOKES
Portland, OR 97224 Address 317 SW Alder Suite 800
Portland, OR 97204
Proposed Activity Addition to SFR Phone (503) 248 -9507
This form and the attached conditions will serve as your Service Provider Letter in
accordance with Clean Water Services Design and Construction Standards (R&O 04 -9).
YES ' NO YES NO
Natural Resources I Alternatives Analysis I I
Assessment (NRA) I X Required X
' Submitted , (Section 3.02.6)
i
District Site Visit
Date: X Tier 1 Alternatives Analysis I X
.
Concur with NRA/or X Tier 2 Alternatives Analysis X
submitted information
` I
Sensitive Area Present
On Site I X Tier 3 Alternatives Analysis X
_
Sensitive Area Present Vegetated Corridor I
Off -Site I X I Averaging ' I X
Vegetated Corridor Vegetated Corridor
Present On -Site X I I Mitigation Required I f X
Varible 50 -200 feet ( - .
i Width of Vegetated spacific corridor width On Site Mitigation X
Corridor (feet) for this site has not been g
determined !! _
} Condition of Vegetated Good Off -Site Mitigation f
i Corridor I I X I
Enhancement Required X Planting Plan Attached X
�_ _ I I
i
Encroachment into Enhancement/restoration I
Vegetated Corridor X completion date March 31, 2006
(Section 3.02.4) I
Type and Square Footage € Not allowed under this Geotechnical Report
of Encroachment approval required I X
I Allowed Use X Conditions Attached X
(Section 3.02.4) 1
This Service Provider Letter does NOT eliminate the need to evaluate and protect
water quality sensitive areas if they are subsequently discovered on your
property.
Page 1 of 2
File Number
3793
In order to comply with Clean Water Services (the District) water quality
protection requirements the project must comply with the following conditions:
1. No structures, development, construction activities, gardens, lawns, application of chemicals,
uncontained areas of hazardous materials as defined by Oregon Department of Environmental
Quality, pet wastes, dumping of materials of any kind, or other activities shall be permitted within the
sensitive area which may negatively impact water quality, except those allowed by Section 3.02.3.
2. No structures, development, construction activities, gardens, lawns, application of chemicals,
uncontained areas of hazardous materials as defined by Oregon Department of Environmental
Quality, pet wastes, dumping of materials of any kind, or other activities shall be permitted within the
vegetated corridor which may negatively impact water quality, except those allowed by Section
3.02.4.
3. An approved Oregon Department of Forestry Notification is required for one or more trees harvested
for sale, trade, or barter, on any non - federal lands within the State of Oregon.
4. Appropriate Best Management Practices (BMP's) for Erosion Control, in accordance with the CWS
Erosion Control Technical Guidance Manual shall be used prior to, during, and following earth
disturbing activities.
5. Activities located within the 100 -year floodplain shall comply with Section 3.13 of R &O 04 -9.
6. Removal of native, woody vegetation shall be limited to the greatest extent practicable.
7. Removal of invasive non - native species by hand is required in all vegetated corridors rated "good ".
Replanting is required in any cleared areas larger than 25 square feet.
8. Should final plans differ from those submitted for review by the District, the applicant shall provide
updated drawings, and obtain a revised Service Provider Letter.
9. Clean Water Services shall be notified 72 hours prior to the start and completion of
enhancement/restoration activities. Enhancement/restoration activities shall comply with the
guidelines provided in Landscape Requirements (R &0 04 -9: Appendix D).
10. Prior to installation of plant materials, all invasive vegetation within the vegetated corridor shall be
removed. During removal of invasive vegetation care shall be taken to minimize impacts to existing
native trees and shrub species.
11. Enhancement/restoration of the vegetated corridor shall be provided in accordance with the attached
planting plan and R &O 04 -9, Appendix D.
This Service Provider Letter is not valid unless CWS - approved site plan is attached.
Please call (503) 681 -3605 with any questions.
Chuck Buckallew
Environmental Plan Review
Attachments (2)
Page 2 of 2
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Approximate w M . f lr�s� i t
wetland boundary ..- a - ' � � '� • •�� 7
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Trail system
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0 Stream intermittent from this point
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`� Clean Approved Services
BY 4o3 Date 001
A.
Table 2. Planting treatment for the ivy patch within the Phelps vegetated corridor portion.
Scientific Name Common Name Spacing Net on Quaittity'
center)
Shrubs
Berberis spp. ( Oregon grape 4 3
Acer circinatum Vine maple 4 3
Symphoricarpos albus Snowberry 4 2
Carylus cornuta Western hazel 4 2
I Total Plants 10
Totals include excess plantings of 20% to account for normal mortality while ensuring that mitigation
success criteria are met. Final quantity will be determined upon final area.
n Note: Spacing is a guideline that will depend upon existing vegetation retained within the corridor. Shrubs
should be clumped to mimic natural conditions.
General guidelines for plant material and their installation are as follows:
• Modifications to the planting plan may occur based on field conditions and the
availability of plant material.
•
• Woody planting will occur in the fall or winter after plant dormancy has cmmnenced
(December Ito March 31).
• Plantings will be bare-root. live stake and containerized (1 gallon) native plant
seedlings, as appropriate, from regional genetic stock. Plastic nursery identification
tags will be attached to the stem of each woody planting.
• Shrub seedlings shall be a minimum height of IS inches. Seedlings are typically one
to three years old.
• Local nursery stock should be used to ensure that material has acclimated to local
conditions (reducing planting stress) and is genetically compatible with the local
area.
• Final plant lists will be contingent upon plant availability. If selected species are
unavailable from local nurseries, other genus or species with similar hydrological
requirements may be substituted, upon prior approval.
• Plantings will be distributed in a random pattern to mimic natural conditions.
Grouping or clustering of individual species is appropriate, particularly for shrub
species.
• The proposed locations of woody shrubs shall be field staked and identified with an
approved coding system or by placement of the actual plant material.
• Plant stock shall be handled in a manner that will not break, scrape, or twist any
portion of the plant. Protect plants at all times from conditions that can damage the
plant (e.g., sun, wind, freezing conditions).
•
• Excavate plant pits for shrubs and trees as follows: container stock - width of 2
• times the ball diameter, depth equal to the ball depth; bare root stock - width of 2
times the widest diameter of the roots, depth equal to the root system.
Permit #: 05 - 004683 - 00 - PE
CleanWate " Services
Our commitment is cleat. nspection Request Line: 503- 681 -4444
2550 SW Hillsboro Highway 4 hour notice required for all inspections
Hillsboro, OR 97123
Ph: (503) 681 -3600
Project Name: 15305 SW 153RD AV
Project Address: 15305 SW 153RD AV Issued By: Jackie Humphreys
Type: Erosion Control Issued: Nov 09, 2005
Single Family Expires: May 08, 2006
Project Description: EC ONLY FOR SFR ADDITION
Owner Applicant Contractor
PHELPS, DAVID S AND JEANETTE PHELPS, DAVID S AND JEANETTE NONE
PO BOX 551 PO BOX 551
TUALATIN OR 97062 TUALATIN OR 97062
Fee Description Amount
Erosion Control Inspection Fee 64.00
Erosion Control Plan Check Fee 41.60
Sub Total 105.60
TOTAL 105.60
:„,,, Ilki
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I HEREBY CERTIFY THAT THE ABOVE INFORMATION IS CORRECT.
SIGNATURE: Date:
PHELPS, DAVID S AND JEANETTE