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HomeMy WebLinkAbout05_CWS Service Provider Letter CWS File Number Page 1 of 5 Service Provider Letter 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 19-5, as amended by R&O 19-22). Jurisdiction: City of Tigard Review Type: Tier 2 Analysis Site Address 8400 SW Steve ST SPL Issue Date: August 19, 2025 / Location: Tigard, OR 97223 SPL Expiration Date: August 19, 2027 Applicant Information: Owner Information: Name JEFF PECK Name RICK GRUEN Company CITY OF TIGARD Company CITY OF TIGARD Address 13125 SW HALL BLVD Address 13125 SW HALL BLVD TIGARD OR 97223 TIGARD OR 97223 Phone/Fax (503) 718-2466 Phone/Fax (503) 718-2583 E-mail: jeffp@tigard-or.gov E-mail: rickg@tigard-or.gov Tax lot ID Development Activity 1S136CB04402 Steve Street Park Pre-Development Site Conditions: Post Development Site Conditions: Sensitive Area Present: On-Site Off-Site Sensitive Area Present: On-Site Off-Site Vegetated Corridor Width: 50 Vegetated Corridor Width: Variable Vegetated Corridor Condition: Marginal/Degraded Enhancement of Remaining Vegetated Corridor Required: Square Footage to be enhanced: 10,580 Encroachments into Pre-Development Vegetated Corridor: Type and location of Encroachment: Square Footage: ADA path & Steve St. Connection (Permanent encroachment; Mitigaiton required) 1,437 Mitigation Requirements: Type/Location Sq. Ft./Ratio/Cost Onsite/Replacement Mitigation and Public Benefit 3,790 Conditions Attached Development Figures Attached ( 2 ) Planting Plan Attached Geotech Report Required 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. 24-002783 X X X X X X X X CWS File Number Page 2 of 5 24-002783 In order to comply with Clean Water Services 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 or Vegetated Corridor which may negatively impact water quality, except those allowed in R&O 19-5, Chapter 3, as amended by R&O 19-22. 2. Prior to any site clearing, grading or construction the Vegetated Corridor and water quality sensitive areas shall be surveyed, staked, and temporarily fenced per approved plan. During construction the Vegetated Corridor shall remain fenced and undisturbed except as allowed by R&O 19-5, Section 3.06.1, as amended by R&O 19-22 and per approved plans. 3. If there is any activity within the sensitive area, the applicant shall gain authorization for the project from the Oregon Department of State Lands (DSL) and US Army Corps of Engineers (USACE). The applicant shall provide Clean Water Services or its designee (appropriate city) with copies of all DSL and USACE project authorization permits. 4. 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. 5. Prior to any ground disturbing activities, an erosion control permit is required. Appropriate Best Management Practices (BMP's) for Erosion Control, in accordance with Clean Water Services' Erosion Prevention and Sediment Control Planning and Design Manual, shall be used prior to, during, and following earth disturbing activities. 6. Prior to construction, a Stormwater Connection Permit from Clean Water Services or its designee is required pursuant to Ordinance 27, Section 4.B. 7. Activities located within the 100-year floodplain shall comply with R&O 19-5, Section 5.10, as amended by R&O 19-22. 8. Removal of native, woody vegetation shall be limited to the greatest extent practicable. 9. The water quality swale and detention pond shall be planted with Clean Water Services approved native species, and designed to blend into the natural surroundings. 10. Should final development plans differ significantly from those submitted for review by Clean Water Services, the applicant shall provide updated drawings, and if necessary, obtain a revised Service Provider Letter. 11. The Vegetated Corridor width for sensitive areas within the project site shall be a minimum of 50 feet wide, as measured horizontally from the delineated boundary of the sensitive area. 12. For Vegetated Corridors up to 50 feet wide, the applicant shall enhance the entire Vegetated Corridor to meet or exceed good corridor condition as defined in R&O 19-5, Section 3.14.2, Table 3-3, as amended by R&O 19-22. 13. 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 using low impact methods. The applicant shall calculate all cleared areas larger than 25 square feet prior to the preparation of the required Vegetated Corridor enhancement/restoration plan. 14. Prior to any site clearing, grading or construction, the applicant shall provide Clean Water Services with a Vegetated Corridor enhancement/restoration plan. Enhancement/restoration of the Vegetated Corridor shall be provided in accordance with R&O 19-5, Appendix A, as amended by R&O 19-22, and shall include planting specifications for all Vegetated Corridor, including any cleared areas larger than 25 square feet in Vegetated Corridor rated ""good."" 15. Prior to installation of plant materials, all invasive vegetation within the Vegetated Corridor shall be removed per methods described in Clean Water Services' Integrated Pest Management Plan, 2019. During removal of invasive vegetation care shall be taken to minimize impacts to existing native tree and shrub species. 16. Clean Water Services and/or City shall be notified 72 hours prior to the start and completion of enhancement/restoration activities. Enhancement/restoration activities CWS File Number Page 3 of 5 24-002783 shall comply with the guidelines provided in Planting Requirements (R&0 19-5, Appendix A, as amended by R&O 19-22). 17. Maintenance and monitoring requirements shall comply with R&O 19-5, Section 2.12.2, as amended by R&O 19-22. If at any time during the warranty period the landscaping falls below the 80% survival level, the owner shall reinstall all deficient planting at the next appropriate planting opportunity and the two year maintenance period shall begin again from the date of replanting. 18. Performance assurances for the Vegetated Corridor shall comply with R&O 19-5, Section 2.07.2, Table 2-1 and Section 2.11, Table 2-2, as amended by R&O 19-22. 19. Clean Water Services shall require an easement over the Sensitive Area and Vegetated Corridor conveying storm and surface water management to Clean Water Services or the City that would prevent the owner of the Vegetated Corridor from activities and uses inconsistent with the purpose of the corridor and any easements therein. FINAL PLANS 20. Final construction plans shall include landscape plans. In the details section of the plans, a description of the methods for removal and control of exotic species, location, distribution, condition and size of plantings, existing plants and trees to be preserved, and installation methods for plant materials is required. Plantings shall be tagged for dormant season identification and shall remain on plant material after planting for monitoring purposes. 21. A Maintenance Plan shall be included on final plans including methods, responsible party contact information, and dates (minimum two times per year, by June 1 and September 30). 22. Final construction plans shall clearly depict the location and dimensions of the sensitive area and the Vegetated Corridor (indicating good, marginal, or degraded condition). Sensitive area boundaries shall be marked in the field. 23. Protection of the Vegetated Corridors and associated sensitive areas shall be provided by the installation of permanent fencing and signage between the development and the outer limits of the Vegetated Corridors. Fencing and signage details to be included on final construction plans. This Service Provider Letter is not valid unless CWS-approved site plan is attached. Please call (503) 681-3653 with any questions. Lindsey Obermiller Environmental Plan Review Attachments ( 2 ) Exhibit A Existing Conditions                                )LJXUH ([LVWLQJ&RQGLWLRQV 8 ? * , 6 ? * , 6 ? 3 U R M H F W V ?     [ [ [ ? '          B   B 6 W H Y H B 6 W U H H W B & 3 $ B ( 6 ( ( B $ Q D O \ V L V ?   B 3 U R M H F W ? 6 W H Y H B 6 W U H H W B & 3 $ B ( 6 ( ( B $ Q D O \ V L V  D S U [  ' + R O V W D G            Project Site Property Line Easement Fence Road, Sidewalk, & Building Major Contour (5-foot) Minor Contour (1-foot) Delineated Wetland Vegetated Corridor (50-ft Buffer)Source(s): Imagery: Maxar 2024, Survey: Westlake Consultants 2024, Wetland: ESA 2024 0 100 Feet 0 25 Meters –‡˜‡–”‡‡–    ͠ ͛ ” †   ˜ ‡    ͠ ͜ – Š   ˜ ‡ 24-002783 08/19/2025 1 2 EASEAS EA S EA S EA S EA S EA S EA S UE UE UEUEUE SAEEASSAE EAS SAE EAS EA S EA S W W SD SD SD SD SD SD SD SD SD SD SD SD SD SD SD SD SD SD SD SD SS SS SS SS SS SS SS SS SS SS SS SS SS SS SS SS SS SS SD SD SD SD GAS DS SD GAS SD SS SS SS SS SS SS SS UEUEUEUEUEUEUEUEUEUEUEUEUEUEUE SDEEDSSDEEDSSDEEDSSDEEDSSDEEDSSDEEDSSDESDESDE SDE SDE EDS SDE SDE EDS SDE EDS SDE SDE EDS SDE EDS SDE SDE EAS SAE SAE EA S EA S EA S EAS EA S EA S EA S Ɣ Ɣ \//\ŶŶŶŶ \/ \/ \/ \/ \/ \/ \/ \/ ŷŷŷŷŷżżżżżżżżŷŷŷŷŷŷŶŶŶŶŶŶŶŶƑƑƑƑƑ 6 TOL SW S T E V E S T R E E T EVA HT48 WS KEERC HSA SWODAEM 01 TOLLOT 98 TOL7 TOL 21 TOL 11 TOL 01 TOL DNALTEW 31 TOL 41 TOL GNITSIXE RETAWMROTS YTILICAF LI M I T O F W O R K KROW FO TIMIL ƑƑ Ƒ Ƒ Ƒ Ƒ 56 64 63 26 61 06 59 57 56 5455 58 53 25 50 15 46 47 48 49 14 04 45 34 24 39 83 44 33 23 43 35 13 03 36 37 92 28 27 24 32 25 26 22 21 20 19 81 7116 12 31 14 15 11 10 8 9 7 54 6 3 21 69 6867 66 TPZ R = 1 0 ' - 0 " R=26'-0" R=20'-0" TPZ R = 4 8 ' - 0 " TP Z R = 3 6 ' - 0 " TPZ R=16'-0" TPZ R=14 ' - 0 " TPZ R = 1 8 ' - 0 " Ƒ Ƒ Ƒ Ƒ ƑƑ Ƒ Ƒ Ƒ Ƒ Ƒ Ƒ Ƒ ƑƑƑƑƑƑ Ƒ Ƒ Ƒ Ƒ ƑƑ Ƒ ƑƑ Ƒ Ƒ Ƒ Ƒ Ƒ Ƒ Ƒ Ƒ Ƒ Ƒ ƑƑ Ƒ Ƒ Ƒ ƑƑ Ƒ Ƒ Ƒ ƑƑƑƑƑƑƑ Ƒ Ƒ Ƒ Ƒ Ƒ Ƒ Ƒ Ƒ Ƒ Ƒ Ƒ Ƒ ƑƑƑ ƑƑ Ƒ Ƒ Ƒ Ƒ Ƒ Ƒ Ƒ Ƒ Ƒ Ƒ Ƒ Ƒ Ƒ Ƒ Ƒ Ƒ Ƒ ƑƑƑƑƑ ƑƑ TREE PROTECTION LEGEND SYMBOL ITEM EXISTING TREES TO REMAIN TREE PROTECTION FENCING CRITICAL ROOT ZONE TREE PROTECTION ZONE DIAMETER CONIFER DECIDUOUS 1. TRUNK PROTECTION AND SUPPLEMENTAL WATERING MAY BE REQUIRED AT THE DISCRETION OF THE PROJECT ARBORIST. 2. ANY CONSTRUCTION WORK INCLUDING BUT NOT LIMITED TO DEMOLITION, GRADING AND TRENCHING IN ANY TPZ SHALL ONLY BE DONE WITH WRITTEN APPROVAL FROM THE OWNER'S REPRESENTATIVE. CUT AND GRIND ALL STUMPS EXCEPT AS NOTED. 3. NO PARKING, EXCAVATION, TRENCHING, GRADING, ROOT PRUNING, STOCKPILING OF ANY MATERIALS OR OTHER ACTIVITIES SHALL OCCUR WITHIN THE TREE PROTECTION FENCING UNLESS APPROVED BY THE PROJECT ARBORIST. 4. TREE PROTECTION FENCING NOT TO BE MOVED WITHOUT PRIOR APPROVAL OF THE PROJECT ARBORIST. TREE PROTECTION NOTES 1. SEE SHEET L9.5 FOR TREE PROTECTION-ZONE FENCING DETAIL. SHEET NOTES Ƒ Ƒ Ƒ DECIDUOUS '01=ZPT TREE REMOVAL LEGEND SYMBOL ITEM EXISTING TREES TO REMOVE REFERENCE KEYNOTES SALVAGE WOOD FROM REMOVED TREES FOR NATURE PLAY ELEMENTS1 2 3 VEGETATED CORRIDOR LEGEND SYMBOL ITEM AREA OF PATHWAY IMPACT TO WETLAND BUFFER: 982 SF DEVELOPED AREA OF GRADING IMPACT TO WETLAND BUFFER: 455 SF DEVELOPED AREA FOR VEGETATED CORRIDOR PLANTING: UP TO 3,790 SF AVAILABLE AREA OF EXISTING ONSITE VEGETATED CORRIDOR: 10,580 SF AREA OF EXISTING ONSITE WETLANDS: 5,262 SF PROJECT ARBORIST OVERSIGHT MAY BE NECESSARY IF THERE IS A CURB BORDERING PLAY AREA PROJECT ARBORIST OVERSIGHT MAY BE NECESSARY IF LARGE CUT CLOSE WITHIN 10 FT OF TREE 23 4 EXISTING CHAIN LINK FENCE TO REMAIN AND ACT AS TREE PROTECTION FENCING RESTORED TO GOOD CONDITION G: \ P R O J E C T S \ 2 0 0 2 4 9 . 5 _ S T E V E _ S T R E E T _ P A R K \ 0 2 _ P R O D U C T I O N \ 0 1 _ C A D \ 0 1 _ P L O T _ S H E E T S \ 2 0 0 2 4 9 _ T R E E . D W G 110 SE Main St., Suite 100Portland, OR 97214Ph: (503) 222-5612Fax: (503) 222-2283 Email: info@greenworkspc.com LANDSCAPE ARCHITECTUREENVIRONMENTAL DESIGN THESE DRAWINGS ARE THE PROPERTY OFGREENWORKS, P.C., AND ARE NOT TO BE USED OR REPRODUCED IN ANY MANNER, EXCEPT WITH THE PRIOR WRITTEN PERMISSION OF GREENWORKS, P.C. GREENWORKS, P.C.2025, ALL RIGHTS RESERVED© Pr o j e c t : VERIFY SCALE: DRAWINGS ARE TOSCALE IF BAR MEASURES 1" 0" 1/2" 1" Checked By: Job No. Approved: Drawn By: Sheet No.of Date: Revisions: Sh e e t T i t l e : Su b m i t t a l : St e v e S t r e e t P a r k Ci t y o f T i g a r d 84 0 0 S W S T E V E S T R E E T TI G A R D , O R 9 7 2 2 3 50 3 - 7 1 8 - 2 7 8 8 CA R L A @ T I G A R D - O R . G O V 200249.5 39 BJ PG SS/MM/MPL 07/25/2025 10 0 % C O N S T R U C T I O N D O C U M E N T S 0' 10' 20' 40' SCALE: 1" = 20'-0" TR E E P R O T E C T I O N AN D R E M O V A L P L A N L2.0 6NORTH 1 TYP 22 2 3 4 4 Exhibit D Proposed Development Final Conditions ZONE 1 ZONE 2 Table 1. Plant List for VC Replacement/Enhancement Contractor will choose from the list below with Substitutions with Similar Species Permissible, Depending on Availability Note: the VC within the Utility Corridor will be restored with a native herbaceous grass mix. ZONE 3 24-002783 08/19/2025 22