The URL can be used to link to this page

Drainage and Erosion Control~s~~ `.• X f: ~~^ i ..,. oC~ .~ p Zp03 Yelm Terra Preliminary Drainage Report October 2003 DESIGN/BUILD .CIVIL AND TRANSPORTATION ENGINEERING. PLANNING .SURVEYING onsu t ng t3~oup Preliminary Drainage Report Project Information Project: Prepared for: Contact: Yelm Terra Yelm, Washington October 2003 Yelm Terra Plat Yelm Terra LLC S.L. Chamberlain 4200 6th Ave. SE, Ste. 301 Lacey, WA 98503 (360) 493-6002 Reviewing Agency Jurisdiction: Project Number: Project Contact: City of Yelm, Washington Project Engineer Prepared by: Contact SCA Project: File Number: SCA Consulting Group PO Box 3485 Lacey, WA 98509-3485 (360) 493-6002 Daniel J. Osier, P.E. 03008 FAX (360) 493-2476 g: \text\pf\03008\03008_93003_pdr_rtf PROJECT ENGINEERS CERTIFICATION: I hereby certify that this Final Drainage Report for the Yelm Terra Plat in Yelm Washington has been prepared by me or under my supervision and meets the intent of the City of Yelm Development Guidelines and Washington State Department of Ecology (WSDOE) Stormwater Management Manual for the Puget Sound Basin unless noted otherwise, and normal standards of engineering practice. I understand that the jurisdiction does not and will not assume liability for the sufficiency, suitability, or performance of drainage facilities designed for this development. ~~ of w~sN~NCs'~~` ~~ cZ ~ N 1. ~~ ~ ,~ ~ 39 SIONAL EXPI TABLE OF CONTENTS APPENDICES PART [STORM DRAINAGE REPORT ........................................................................................ 1 Appendix 1 -Preliminary Drainage Calculations SECTION I - PROPOSED PROJECT DESCRIPTION ........................................................... .. SECTION 2 -EXISTING CONDITIONS ................................................................................... . 4 Appendix II -Preliminary Drainage and TESC Plan SECTION 3 -INFILTRATION RATES/SOILS REPORT ........................................................ .. 4 SECTION 4 -WELLS AND SEPTIC SYSTEMS ....................................................................... .. 5 Appendix -Il - FEMA FIRM Map SECTION 5 - FUEL TANKS .................................................................................................... . 5 APPendix IV - SCS Soils Map and SECTION 6 - SUB-BASIN DESCRIPTION ............................................................................. . 5 Soils Logs SECTION 7 - ANALYSIS OF 100-YEAR FLOOD ..................................................... . . 5 . ..... .... .. Appendix V -Vicinity Map SECTION 8 - AESTHETIC CONSIDERATIONS FOR FACILITIES .................................... .. 5 SECTION 9 - DOWNSTREAM ANALYSIS AND FACILITY SIZING ............................... ... 6 SECTION l0 -COVENANTS, DEDICATIONS, EASEMENTS .............................................. .. 6 PART II -EROSION CONTROL REPORT ................................................................................. 7 SECTION 1 - CONSTRUCTION SEQUENCE AND PROCEDURE ..................................... .. 7 SECTION 2 - TRAPPING SEDIMENT .................................................................................... . 7 SECTION 3 - PERMANENT EROSION CONTROL & SITE RESTORATION ................... ... 8 SECTION 4 - GEOTECHNICAL ANALYSIS AND REPORT ............................................... .. 8 SECTION 5 - INSPECTION SEQUENCE ................................................................................ . 8 SECTION 6 - CONTROL OF POLLUTANTS OTHER THAN SEDIMENTS ....................... .. 8 PART I11-MAINTENANCE PLAN .............................................................................................. 9 SECTION I - REQUIRED MAINTENANCE ......................................................................... I 1 SECTION 2 - RESPONSIBLE ORGANIZATION .................................................................. 18 SECTION 3 - VEGETATION MANAGEMENT PLAN ......................................................... 18 SECTION 4 - SOURCE CONTROL ........................................................................................ 18 ii Part I Storm Drainage Report Yelm Terra Preliminary Drainage Report PART I STORM DRAINAGE REPORT SECTION 1 - PROPOSED PROJECT DESCRIPTION Project Proponent: Yelm Terra LLC 4200 6th Ave. SE, Ste. 301 Lacey, WA 98503 (360) 493-6002 Parcel Numbers: 22730210500, 22730210600, 22730210700 and 22730210800 Total Site Area: 24.25 Acres Zoned: R-4 Site Address: 105th Ave @ 3rd St, Yelm, WA 98597 Required Permits: Grading, Utility, Building, Plumbing, Electrical, Mechanical etc. Section, Township, Range: Section 30, Township 17 North, Range 2 East, W.M., Thurston County, WA Site Location: The site is located in Yelm, Washington and is bordered on the south by 105th Ave and situated westerly from Clark Rd. Project Overview: The proposal is to develop the 24.25 acres into 971ot single family residential subdivision. The development of the proposed site will be constructed in one phase and will include appropriate erosion control measures as needed, grading, storm drainage improvements, frontage improvements and extension of underground utilities including water and sanitary sewer. Storm Drainage Improvements: The completed project will create approximately 4.73 acres of new impervious roadway, 6.70 acres of disturbed pervious area, and 4.45 acres of lot impervious area, and 0.48 ac of pond area. All project impervious areas (roads, walks, roofs) are accounted for below SCA Consulting Group Page 1 October 2003 Yelm Terra Preliminary Drainage Report Table 1 Post-Development Basin Area Summary Basin A Basin B Basin C Total Lot Impervious Area (Tributary and not- 1.97 ac 1.01 ac 1.47 ac 4.45 ac tributary) Impervious Roadway/Sidewalk 1.72 ac 1.49 ac 1.52 ac 4.73 ac Pond Area 0.22 ac O. l0ac 0.16ac 0.48ac Disturbed Pervious (on-site) 3.50 ac 1.26 ac 1.94 ac 6.70 ac Total 7.41 ac 3.86 ac 5.09 ac 16.36 ac Stormwater Treatment: Stormwater treatment design requirements are based on the 1992 edition of the WSDOE Stormwater Management Manual. StormShed and F1owMaster software were used to size the treatment facilities. Preliminary treatment calculations are provided in Appendix I. Basin `A': Basin `A' includes the 43 lots with access road and internal landscaping areas on the western part of the property. Also included is the northern half of the 105th Ave frontage. Runoff from these areas will sheet flow to a series of street side catch basins and be directed toward atwo-stage wet pond for treatment and into 332-foot long shallow Swale for infiltration. The pond and Swale were sized to exceed the minimum treatment requirements of the DOE Stormwater Manual. Basin `B': Basin `B' includes the 221ots with access road and internal landscaping areas and located centrally on the southern part of the property. Also included is the northern half of the 105th Ave frontage. Runoff from these areas will sheet flow to a series of street side catch basins and be directed toward atwo-stage wet pond for treatment and into a 332-foot long shallow Swale for infiltration. The pond and swale have been sized to exceed the minimum treatment requirements of the DOE Stormwater Manual. Basin `C': Basin `C' includes the 32 lots with access road and internal landscaping areas on the eastern part of the property. Also included is the northern half of the 105th Ave frontage. Runoff from these areas will sheet flow to a series of street side catch basins and be directed toward athree-stage wet pond for treatment and into a 412-foot long shallow swale for infiltration. The pond and Swale have been sized to exceed the minimum treatment requirements of the DOE Stormwater Manual. SCA Consulting Group Page 2 October 2003 Yelm Terra Preliminary Drainage Report Stormwater Storage/Infiltration: Stormwater storage and infiltration requirements are based on the 1992 edition of the DDECM for Thurston County, 1994 Edition using a design infiltration rate of 20- inches/hour and minimum requirements of 1000 cubic feet per acre of disturbed pervious and 3000 cubic feet per acre of impervious area. Preliminary storage and infiltration calculations are also provided in Appendix I. StormShed software was used to size the infiltration facilities. Roof runoff from individual lots will be rooted to drywells located within respectful lots. Basin `A': Stormwater runoff conveyed through the system of wet ponds for treatment and storage, and will discharge into a swale for infiltration to groundwater. The proposed pond volume of 11,340 cf exceeds the minimum-modeling requirement of 10,790 cf. Basin `B': Stormwater runoff conveyed through the system of wet ponds for treatment and storage, and will discharge into a swale for infiltration to groundwater. The proposed pond volume of 7,200 cf exceeds the minimum-modeling requirement of 6,780 cf. Basin `C': Stormwater runoff conveyed through the system of wet ponds for treatment and storage, and will discharge into a swale for infiltration to groundwater. The proposed pond volume of 8,940 cf exceeds the minimum-modeling requirement of 8,090 cf. Stora a Ca acit Summar Basin ID Impervious Area Disturbed Pervious Area Storage ~1> Re uired Storage Provided Basin A 2.43 ac 3.50 ac 10,790 cf 11,340 cf Basin B 1.84 ac 1.26 ac 6,780 cf 7,200 cf Basin C 2.05 ac 1.94 ac 8,090 cf 8,940 cf TOTAL 6.32 ac 6.7 ac 25,660 cf 27,480 of (1) Based on design infiltration rate of 20-inches/hour and using minimum requirements of 1000 cubic feet per acre of disturbed pervious and 3000 cubic feet per acre of impervious area SCA Consulting Group Page 3 October 2003 Yelm Terra Preliminary Drainage Report ROOF RUNOFF: Roof runoff from new construction shall be routed to individual onsite drywells. The drywelss shall be sized per the DOE Stormwater Manual based on an average roof size of 1, 500 sf. As all lots shall have drywells based on Class B soils. SECTION 2 -EXISTING CONDITIONS The site is 24.25 acre rectangular in shape with 1993 feet fronting 105th Ave. The site is fairly flat with gentle slopes to the west and southwest with low elevations of approximately 345 ft. located centrally on the western property line. The highest elevation of 352 ft is at the southeast corner. The site is occupied by one residential building (to be removed) located centrally on the northern 1/3 of the site. The site has a moderate density of old growth Fir trees in the central portion of the site. The remainder of the site is covered with a light to moderate density of Scotch Broom growth with indigenous field grasses. The project site is bounded by residential property to the north and west, Clark Road to the east and 105th Ave. to the south. On site soils are well drained and formed in glacial outwash. There are no creeks, lakes, ponds, springs, wetlands, ravines, gullies, steep slopes or other environmentally sensitive areas identified onsite or down gradient of the subject property. The site is located in an aquifer sensitive area, according to the 1986 Thurston County Comprehensive Plan M-8. The site is not located in a wellhead protection area. SECTION 3 -INFILTRATION RATES/SOILS REPORT The Soil Conservation Service (SCS) Soil Survey of Thurston County classifies onsite soils as Spanaway (110) series. Onsite soil test pits examined confirm the SCS classification. Six test pits were excavated by backhoe to a maximum depth of 186" below existing grade. Soils were inspected by entering and visually logging each test pit to a depth of four feet. Soils beyond four feet were inspected by examining backhoe tailings. No groundwater was encountered in the test pits, therefore, the bottom of the infiltration galleries will be at least three feet above the seasonal high ground water table, per WSDOE requirements. Six double ring infiltration tests were performed onsite. An infiltration rate of 20 inches per hour was used for design purposes. This is a conservative rate based on actual infiltration rates observed in the field. Copies of the soil logs and infiltration tests are provided in Appendix V of this report. The soil log and infiltration test pit locations are shown on the preliminary Grading, Drainage and TESC Plan in Appendix II. SCA Consulting Group Page 4 October 2003 Yelm Terra Preliminary Drainage Report SECTION 4 WELLS AND SEPTIC SYSTEMS No onsite wells were found during our site investigation of the proposed site. Existing home is served by City water. No onsite well logs were found at the Department of Ecology. No abandoned or existing septic systems were identified during SCA's site investigation or at the Thurston County Development Services office. Any septic system found will be removed in accordance with Thurston County Department of Health standards. SECTION 5 - FUEL TANKS No fuel tanks were located during SCA's site inspection or during soils work. Additionally, a review of the DOE's Leaking Underground Storage Tank (LUST) list did not indicate any existing or abandoned fuel tanks on the project site. SECTION 6 - SUB-BASIN DESCRIPTION The project site is located in the Yelm Creek Drainage Basin per Thurston County Comprehensive Map M-4. During SCA's site investigation and soils analysis, it appeared that all onsite stormwater runoff is contained onsite and infiltrated back into the groundwater, which is typical of the site's soil classification. All onsite stormwater runoff will be contained and infiltrated onsite. There does not appear to be any significant existing offsite drainage to the property. drain onto the property. As discussed previously, the proposed development has been divided into three drainage sub-basins. The facilities in these sub-basins consist of three-stage and two-stage wetponds to provide stormwater treatment and infiltration swales to provide storage and infiltration of the treated stormwater. No hazardous materials handling is anticipated in the area tributary to the storm drainage facilities. SECTION 7 - ANALYSIS OF 100-YEAR FLOOD This project does not lie adjacent to or contain a stream onsite and has not been identified as a 100-year flood hazard area. A FEMA FIRM Map is included in Appendix IV. SECTION S - AESTHETIC CONSIDERATIONS FOR FACILITIES The storm drainage facilities are located underground. All disturbed pervious areas will be vegetated and landscaped. SCA Consulting Group Page 5 October 2003 Yelm Terra Preliminary Drainage Report SECTION 9 - DOWNSTREAM ANALYSIS AND FACILITY SIZING Sizing calculations for the project's stormwater treatment, storage, and infiltration facilities are provided in Appendix I of this report. All calculations correspond to the Preliminary Grading, Drainage and TESC Plan, which can be found in Appendix II of this report. Since all stormwater will be infiltrated onsite, a downstream analysis was deemed unnecessary. SECTION 10 -COVENANTS, DEDICATIONS, EASEMENTS Onsite drainage facilities including pipes, wet vaults, and infiltration galleries will require routine maintenance. The maintenance manual prepared for the project will list the maintenance requirements. A copy of the completed Maintenance Manual can be supplied to the City upon completion of the project. SCA Consulting Group Page 6 October 2003 Part II Erosion Control Report Yelm Ten-a Preliminary Drainage Report PART II -EROSION CONTROL REPORT SECTION 1 - CONSTRUCTION SEQUENCE AND PROCEDURE The proposed commercial development will include site grading and erosion control measures designed to contain silt and soil within the project boundaries during construction until permanent vegetation and site improvements are in place. Erosion/sedimentation control shall be achieved by a combination of structuraUvegetative cover measures and construction practices tailored to fit the site. Best Management Practices (BMP's) will be employed to properly clear and grade the site and to schedule construction activities. Before any construction begins onsite, erosion control facilities shall first be installed. The planned construction sequence is as follows: 1. Schedule preconstruction conference with the city, contractor, project engineer, and construction-staking surveyor. 2. Install rock construction entrance. Use 4" to 8" diameter spalls with 12" minimum depth. 3. Install filter fabric fencing in the locations shown on the plans. 4. Clear site (grubbing and rough grading). 5. Maintain equipment and water supply for dust control. 6. Designate an area for washing concrete trucks to control the runoff and eliminate entry into the storm drainage system. 7. Install underground utilities (water, sewer, storm). 8. Provide inlet protection around all new catch basins. 9. Construct roadway and parking and install landscaping, sod and/or seed, and mulch all disturbed areas. 10. Maintain all erosion control facilities until the entire site is stabilized and silt runoff ceases. SECTION 2 - TRAPPING SEDIMENT Filter fabric fencing will be installed to trap sediment before runoff exits the site. In addition, inlet protection will be installed around all existing and new catch basins to filter out sediment before runoff enters the storm system. A stabilized construction entrance will be installed to prevent construction vehicles from tracking soil onto roadways. If sediment is tracked offsite, it shall be swept or shoveled from paved surfaces on a daily basis, so that it is not washed into existing catch basins or other storm drainage facilities. During the rainy season from November 1 through March 31, the contractor must cover any disturbed areas greater that 5,000 SF in size if they will be unworked for more than 12 hours. Mulch, sodding, or plastic covering shall be used to prevent erosion in these areas. SCA Consulting Group Page 7 October 2003 Yelm Terra Preliminary Drainage Report SECTION 3 - PERMANENT EROSION CONTROL & SITE RESTORATION All disturbed areas will be paved with asphalt, covered by buildings, or landscaped with grass, shrubbery, or trees per the landscaping plans. SECTION 4 - GEOTECHNICAL ANALYSIS AND REPORT None of the storm drainage facilities are located near the top of a steep slope. Therefore, a geotechnical analysis for slope or soil stability was deemed unnecessary. See Appendix V for a complete soils description. SECTION 5 - INSPECTION SEQUENCE In addition to required City inspections, the Project Engineer will inspect facilities related to stormwater treatment, erosion control, storage, and conveyance during construction. At a minimum, the following items shall be inspected at the time specified: 1. The erosion control facilities shall be inspected before the start of clearing and grading to ensure the following structures are in place: a. Construction Entrance b. Filter Fabric Fences c. Inlet protection of new catch basins 2. The conveyance systems will be inspected after construction of the facilities, but before project completion to ensure the following items are in working order: a. Pavement Drainage b. Catch Basins c. Conveyance Piping d. Roof Drain Piping 3. The infiltration galleries shall be inspected during construction to ensure that the facility is constructed to design specifications. 4. The permanent site restoration measures shall be inspected after landscaping is completed. A final inspection shall be performed to verify final grades, settings of structures and all necessary information to complete the Engineer's Construction Inspection Report Form. This form must be completed prior to final public works construction approval. SECTION 6 - CONTROL OF POLLUTANTS OTHER THAN SEDIMENTS The contractor will be required to designate a washdown area for concrete trucks as well as a temporary stockpile area for construction debris. Catch basin inlet protection and filter fabric fencing shall remain in place until construction on the site is complete. SCA Consulting Group Page 8 October 2003 Part III Maintenance Plan Yelm Terra Preliminary Drainage Report PART III -MAINTENANCE PLAN INSTRUCTIONS FOR MAINTENANCE OF STORM DRAINAGE FACILITIES The following pages contain maintenance needs for most components that are part of the drainage system. A checklist should be completed for all system components according to the following schedule: 1. Monthly from November through April 2. Once in late summer (preferably September) 3. After any major storm (use 1" in 24-hours as a guideline) items marked "S" only. Using photocopies of these pages, check off the problems identified with each inspection. Add comments on problems found and actions taken. Keep these "checked" sheets in a file, as they will be used to write the annual report (due in May of each year). Some items do not need to be checked with every inspection. Use the suggested frequency at the left of each item as a guideline for the inspections. The City of Yelm is available for technical assistance. Do not hesitate to call, especially if it appears that a problem may exist. SCA Consulting Group Page 9 October 2003 Yelm Terra Preliminary Drainage Report ATTACHMENT "A": MAINTENANCE PROGRAM COVER SHEET Inspection Period: Number of Sheets Attached: Date Inspected: Name of Inspector: Inspector's Signature: SCA Consulting Group Page 10 October 2003 Yelm Terra Preliminary Drainage Report SECTION 1 - REQUIRED MAINTENANCE The drainage facilities will require occasional maintenance. The checklists below are the minimum maintenance requirements and inspection frequencies. Maintenance Checklist for Conveyance Systems (Pipes and Swales) Frequency Drainage Problem Conditions to Check For Conditions That Should System Req'd Exist Feature M.S. Pipes Sediment & Accumulated sediment that Pipe cleaned of all debris exceeds 20% of the diameter of sediment and debris. the pipe. M Vegetation Vegetation that reduces free All vegetation removed movement of water through pipes. so water flows freely. A Damaged Protective coating is damaged, Pipe repaired or replaced. (rusted, rust is causing more than 50% bent or deterioration to any part of pipe. crushed) M Any dent that significantly Pipe repaired or replaced. impedes flow (i.e., decreases the cross section area of pipe by more then 20%). M Pipe has major cracks or tears Pipe repaired or replaced. allowing groundwater leakage. M.S. Swales Trash & Dumping of yard wastes such as Remove trash and debris debris grass clippings and branches into and dispose as prescribed Swale. Accumulation of non- by City Waste degradable materials such as Management Section. glass, plastic, metal, foam and coated paper. M Sediment Accumulated sediment that Swale cleaned of all buildup exceeds 20% of the design depth. sediment and debris so that it matches design. M Vegetation Grass cover is sparse and weedy Aerate soils and reseed not or areas are overgrown with and mulch bare areas. growing or woody vegetation. Maintain grass height at a overgrown minimum of 6" for best stormwater treatment. Remove woody growth, recontour and reseed as necessary. M Conversion Swale has been filled in or If possible, speak with by owner to blocked by shed, woodpile, owner and request that incompatibl shrubbery, etc. swale area be restored. e use Contact City to report problem if not rectified voluntarily. A Swale does Water stands in Swale or flow A survey may be needed not drain velocity is very slow. Stagnation to check grades. Grades occurs. need to be in I% range if Nuaa~uw. a giauc ~~ ~css SCA Consulting Group Page 11 October 2003 Yelm Terra Preliminary Drainage Report Frequency Drainage Problem Conditions to Check For Conditions That Should System Req'd Exist Feature possible. If grade is less than 1%, underdrains may need to be installed. If you are unsure whether a problem exists, please contact the Jurisdiction and ask for technical assistance. Comments: Key: A =Annual (March or April preferred) M =Monthly (see schedule) S =After major storms SCA Consulting Group Page 12 October 2003 Yelm Terra Preliminary Drainage Report ATTACHMENT "A" (CONTINUED) Maintenance Checklist for Catch Basins and Inlets Frequency Drainage Problem Conditions to Check For Conditions That System Should Exist Feature M.S. General Trash, debris and Trash or debris in front of No trash or debris sediment in or on the catch basin opening is located basin blocking capacity by more immediately in than 10%. front of catch basin opening. Grate is kept clean and allows water to enter. M Sediment or debris (in the No sediment or basin) that exceeds 1/3 the debris in the catch depth from the bottom of basin. Catch basin basin to invert of the is dug out and lowest pipe into or out of clean. the basin. M.S. Trash or debris in any inlet Inlet and outlet or pipe blocking more than pipes free of trash 1/3 of its height. or debris. M Structural Corner of frame extends Frame is even with damage to frame more than 3/4" past curb curb. and/or top slab face into the street (if applicable). M Top slab has holes larger Top slab is free of than 2 square inches or holes and cracks. cracks wider than 1/4" (intent is to make sure all material is running into the basin). M Frame not sitting flush on Frame is sitting top slab, i.e., separation of flush on top slab. more than 3/4" of the frame from the top slab. A Cracks in basin Cracks wider than 1/2" and Basin replaced or walls/bottom longer than 3', any repaired to design evidence of soil particles standards. Contact entering catch basin a professional through cracks or engineer for maintenance person judges evaluation. that structure is unsound. A Cracks wider than I/2" and No cracks more longer than I' at the joint than I/4" wide at of any inlet/outlet pipe or the joint of any evidence of soil inlet/outlet pipe. particles entering catch basin through cracks. SCA Consulting Group Page 13 October 2003 Yelm Terra Preliminary Drainage Report Frequency Drainage Problem Conditions to Check For Conditions That System Should Exist Feature A Settlement/mis- Basin has settled more than Basin replaced or alignment 1" or has rotated more than repaired to design 2" out of alignment. standards. Contact a professional engineer for evaluation. M.S. Fire hazard or Presence of chemicals such No color, odor or other pollution as natural gas, oil and sludge. Basin is gasoline. Obnoxious dug out and clean. color, odor or sludge noted. M.S. Outlet pipe is Vegetation or roots No vegetation or clogged with growing in inlet/outlet pipe root growth vegetation joints that is more than 6" present. tall and less than 6" apart. if you are unsure whether a problem exists, please contact the Jurisdiction and ask for technical assistance. Comments: Key: A =Annual (March or April preferred) M =Monthly (see schedule) S =After major storms SCA Consulting Group Page 14 October 2003 Yelm Terra Preliminary Drainage Report ATTACHMENT "A" (CONTINUED) Maintenance Checklist for Infiltration Systems Frequency Drainage ~ Problem Conditions to Check For Conditions That Should System Exist Feature M,S General Trash & See Maintenance See Maintenance debris Checklist for Ponds. Checklist for Ponds. buildup in pond M Poisonous See Maintenance See Maintenance vegetation Checklist for Ponds. Checklist for Ponds. M,S Fire hazard See Maintenance See Maintenance or pollution Checklist for Ponds. Checklist for Ponds. M Vegetation See Maintenance See Maintenance not growing Checklist for Ponds. Checklist for Ponds. or is overgrown M Rodent See Maintenance See Maintenance holes Checklist for Ponds. Checklist for Ponds. M Insects See Maintenance See Maintenance Checklist for Ponds. Checklist for Ponds. A Storage ~ Sediment A soil texture test Sediment is removed area buildup in indicates facility is not and/or facility is cleaned system working at its designed so that infiltration capabilities or was system works according incorrectly designed. to design. A sediment trapping area is installed to reduce sediment transport into infiltration area. A ~ Storage A soil texture test Additional volume is area drains indicates facility is not added through slowly working at its designed excavation to provide (more than capabilities or was needed storage. Soil is 48 hours) incorrectly designed. aerated and rototilled to or improve drainage. overflows Contact the City for information on its requirements regarding excavation. SCA Consulting Group Page 15 October 2003 Yelm Terra Preliminary Drainage Report M Sediment Any sediment and debris Clean out sump to design trapping filling area to 10% of depth. area depth from sump bottom-to-bottom of outlet pipe or obstructing flow into the connector pipe. One Time Sediment Stormwater enters Add a trapping area by trapping infiltration area directly constructing a sump for area not without treatment. settling of solids. present Segregate settling area from rest of facility. Contact City for guidance. M Rock `~ Sediment By visual inspection Replace gravel in rock filters and debris little or no water flows filter. through filter during heavy rainstorms. S Infiltratio Infiltration Standing Water in Excavate bottom of n Failure Inspection Well After trench as necessary but Trenches 48 hours after storm or at least 3 feet. Replace Overflow during Storms with crushed rock. Check pretreatment systems for effectiveness. Check tributary area for sediment sources. If you are unsure whether a problem exists, please contact the Jurisdiction and ask for technical assistance. Comments: Kev A =Annual (March or April preferred) M =Monthly (see schedule) S =After major storms SCA Consulting Group Page 16 October 2003 Yelm Terra Preliminary Drainage Report ATTACHMENT "A" (CONTINUED) Maintenance Checklist for Grounds (Landscaping) Frequen Drainage `~ Problem Conditions to Check Conditions That Should cy System For Exist Feature M General ~ Weeds Weeds growing in Weeds present in less (nonpoisono more than 20% of the than 5% of the landscaped us) landscaped area (trees area. and shrubs only). M `~ Safety Any presence of poison No poisonous vegetation hazard ivy or other poisonous or insect nests present in vegetation or insect landscaped area. nests. M,S ~ Trash or See Ponds Checklist. See Ponds Checklist. litter M,S ~ Erosion of Noticeable rills are Causes of erosion are Ground seen in landscaped identified and steps taken Surface areas. to slow down/spread out the water. Eroded areas are filled, contoured, and seeded. A Trees and `~ Damage Limbs or parts of trees Trim trees/shrubs to shrubs or shrubs that are split restore shape. Replace or broken which affect trees/shrubs with severe more than 25% of the damage. total foliage of the tree or shrub. M ~ Trees or shrubs that Replant tree, inspecting have been blown down for injury to stem or roots. or knocked over. Replace if severely damaged. A ~ Trees or shrubs, which Place stakes and rubber- are not adequately coated ties around young supported or are trees/shrubs for support. leaning over, causing exposure of the roots. If you are unsure whether a problem exists, please contact the Jurisdiction and ask for technical assistance. Comments: Kev A =Annual (March or April preferred) M =Monthly (see schedule) S =After major storms SCA Consulting Group Page 17 October 2003 Yelm Terra Preliminary Drainage Report SECTION 2 - RESPONSIBLE ORGANIZATION The project owner shall be responsible for the operations and maintenance of all onsite storm drainage facilities. SECTION 3 - VEGETATION MANAGEMENT PLAN All disturbed pervious areas on the site will be landscaped to provide an aesthetically pleasing environment. SECTION 4 - SOURCE CONTROL Warning signs (e.g., "Dump No Waste -Drains to Groundwater") will be embossed or painted on or adjacent to all storm drain inlets and will be repainted periodically as necessary. SCA Consulting Group Page 18 October 2003 Appendix I Preliminary Drainage Calculations Yelm Terra Preliminary Drainage Report PRELIMINARY DRAINAGE CALCULATIONS The following calculations are based on the requirements contained in the 1992 Washington State Department of Ecology (WSDOE) Stormwater Management Manual for the Puget Sound Basin. DESIGN AND BASIN INFORMATION SUMMARY: Soil Classification (Soil Survey of Thurston County, WA): SCS Soil Classification: Hydrologic Group: Design Infiltration Rate Spanaway, Nisqually B 20 inches hour SCS Runoff Curve Number: (Table III-1.3 WSDOE Storm Manual) Post-developed (Lawns, 75% + grass cover): CN = 80 Post-development (impervious) CN = 98 Pre-development CN = 64 Rainfall Design Storms: (WSDOE Isopluvial Maps -App. AIII-1.1 of WSDOE Storm Manual) 6 month storm (64% of 2 yr. storm) = 1.28" 2 yr./24 hour storm = 2.0" 10 yr./24 hour storm = 3.0" 100 yr./24 hour storm = 4.0" The detailed calculations will be provided with final drainage report. Stormwater Storage/Infiltration: Detailed StormShed software modeling output and spreadsheets for stormwater storage and infiltration results for the three sub-basins will be provided with final drainage report. Below are provided preliminary storage capacity summary, based on Thurston County Drainage Design Standards. Stora a Ca acit Summar Basin ID Impervious Area Disturbed Pervious Area Storage ~1~ Re wired Storage Provided Basin A 2.43 ac 3.50 ac 10,790 cf 11,340 cf Basin B 1.84 ac 1.26 ac 6,780 cf 7,200 cf Basin C 2.05 ac 1.94 ac 8,090 sf 8,940 cf TOTAL 6.32 ac 6.7 ac 25,660 cf 27,480 cf Based on design infiltration rate of 20-inches/hour and using minimum requirements of 1000 cubic feet per acre of disturbed pervious and 3000 cubic feet per acre of impervious area Appendix II Preliminary Drainage Plan ~ Details a~ / r k / +^ ~~ ' N~ ~N ~ N t ~ l.1 + N W gW ^ ~ O 10 J W N 8 E 462.09 ~ ' ) W W XK U1 m 1 H ~ m ' ~ I W O ~~ 1^Ct I ~ ° s v I ~ m I ~' I ' N ~P ~~ ~ ~ I m t ~ N ' I U Y ~ ~ 4 W ' 1 ~ I - v m ~ ICI W I J 1. ~ I r-______ I m ~' ` V U ~ I W Ol 4 m~ I I ~ m ~ I I~ ~ ~ / r^1 N f I A W H~ i ` r O I I' J p ~ ~.' ~ J W ~I ~ ~ I u ~ ill \~ I \ I I m ~ i j~ N ~m i----- ~ u _, ~o D c Z v m ~ o ~ c z v r O ~ n D D I 0 0 I N N Ln U~ m m O m O C g c~ ~y~~~o~ SX~~OD OvVlOmO ~ Nmym z yN ~N y~~OmDC O< O Z Z VI m A ~ m j 0 ~0 m ~S~ N CI D T 1 N-2~ZA nmcYZC>~Q O Fi v o z _ ~ i vl A c n °° N '- ~--~- z~cv°i °o m 2 tit yOVl 1 m ~ -1 y ~ O O SIDnm O c~mm zA v C m m N -( m ~' I. 2 N I IU ~ G1 i0 U I~ ~ ~ I ~ m U I ~ I IN ~ o I ~- I C I ~ I I (r ~ ~ ~ ~ ~ ~~ ~~, I ~ ~~ I~ . V I I ~ 1. A I I m , ! I ~ W I I m + N ~~ I ~' - W I r \ ~~ ' I ) i _ ~ r 6~` r u ~ N ~ ' b/ Yy U ~ r v I N ro ~ I ~ / ~ 1 i I m ~ a0 '. ~ / y0 I ,r m i `~ ~~ v a as m +o a ~~ ~ y+~ I ' ~, I ~ a® I ' ~' ;I o , +~~lU I N ~ i A W I u > _~ ~ ~ I A U i l A m ~~__.~ ~, I i 1 I ~ A ~ w ^N 003J'19" E 101.48 ~~ ' p ._...... O U O .< - N W ~_ AB OC pp~ MA e U~Y ~~ ~® ~~ ~~ _g ~ ~~ ~ . G`J O ~~ O O O O O O O O O ~A= -1 m'ODA mOm~ <--~1 1'l l='1 'T1D ~m-~i o~C~ nv-~~z~A-Im OAOD py m2A ZO 1? ZV1m0 ~ fTl p=y A r Or ~ O o- mN m0 00 m0 00 m1A0 020 minO OSO mn 00 mAOyyA AC)V CmC3mmOm m -oz v- In rz m (n A00 ZAAN mAr AmAC~y~-N Z m ~SA O D-4 ~Z -1Z -- II ~OZ ~ OZ ~ Z V)-Im OI/IZA O C C)y AD D~ m Z pmm vDSO O mOD n~~mDZN~Z N rC0 VI ~ r~ ~~ I TI 3; a7 ~: Jd ~Z -~ ZOOC Ar ~ O D r /1~ N I NOO -I isO CT A D pn ~O --IIZ ON-4NOn ~ O A~ 22mmOZ D F- rA DCC 0 ~ Z~ D r0 m'1 i f7 n'a ZO rr1 ~ ~Zn '1 n '1 r y; Nm>C) ~mr FO,m mO C2 ZVIZ m ~ y 3 BOA O ( NG~Op O S ZO VID~D OO TZ~ yrO 0 IT7 ~~Z VI O D 2m C GD <D G~W mW G~j r i GD ~ OmrC<,°~A V1 - VID ~DI+1 Vl -1 rl ~O A ~ ZI V1~ -1mA O D ~O m A r mm ~0 O A A ~ m 2A~ O Z m N ~ IIN NN II 1`? ~ N N IIW m OVl1~m _A VI N . D =05 mDADy ~ O p NDr r ~Nym XD-1 V1~ 5-10 In l'm1^m O .OVV~ ~0 Z O p 4N AD WN AD U AD W~ ADS ut N~ iACOm~mZ O D mOO ~ N y2m m0; D O Z A Z O O ~I ° Dm ; AOOC S Om ly~1CZD ~m-~N ~ 2 CD O ~ ?G] om A4l O uNm u~m ~ o p P i {-~00-I ZOD in~m O O D x Z I°n~ OD mzvcim D02 ~v VIO I^mooczio VZiiA NO ~ ~~Vlm Z zvr ~-m ~ y N~ om N~ o x N OI o x N O~ m {0 e ;+10~{OUZio SZ-O~m ~mD In~-zi D~ ~ i A m n D~ ~~ n mm 2~pm m ut Dm m0 x N OOD~ N DmrOAZr n r zm D'~ r ~ C m ~ O ~ o o m Or l m~ -O ~z I OCO NCA C ~~ U m A 0 0 ~ m D N n m1..1 O Z O~A-1 ray D -p D2~D '-A~n AOymA O Z ~ ~O A -_4 O N2 O NZ N O Vl O ~Z ~ C m(n~Dry m _ y Ny~ (~ N O . S I ~. m 0 Ay~O ?z m~Om z ~~ Z v0 O 0 ~A Or N ~ • ;^j < < Dm D Nm Aj mN D o p =<DOVIN AD Z~ O ~ ZZ m N ~ N ~ z ut ~ Z N v N mmD mD nAVO O r po Z S i ~ . ® x O~ A ~ In O O VIA Z 03:Cm m W S~ rlyy ~T Cm2m VlmDO OAC O E- m O Z ~ A A CI A ~ A ymA m m ~ Z ~ O C S O I O _ ~O Z A 3;-D Z~ p r-Om Ai Ovl n O , Z ~ ... ~ ~ --11 ~ A A ~ OmS ~O m' yAODO2 SA D .I I N D n ~~ 31N*10 mm ii -- C ~O m <mm O m imn ~Om C -m1m N~ 0 D D ~ Z Z m O DA 00; mA Z p Z m yDA -1 VI ~ D O Z O Z V Z ~-a I1 DO A ~ ~ ~F D m VI Z Z Z m s r O~ VI Z A Z ~ I~D - ~ _ O ~ FmN N Vl VI VI f ~pD 1V~ r D V) D D~ AO D Z N ~ m ~ m O C O ~ -' O A C C C r ti m O Z VI S F D D ~- ~V10~ VIm ~'~ N S p Z O ~ ~ D D y O ~ m .~j O DD~~ Z F;~g DS ~m ~ Z O ~ r p ~ j ~, 0 p n Z Z A S IDiI N O Z -A ~-4 m m m _DD Z D Z N Z m n m A y1m m V Z Z Z O N m O ~ Z O Z O '~ ~ O ut D Z Z CZ1 m 1.1 m I Z v o ~ ~ ~ y 5 ~ ~ OE4GNED BY: CRS v W ~ °s cii °~ ~ 3 YY ~~ i r ~ N ~ ~ DRAWN BY: VAL ~fe ~~~ CHECKED BY: ~ A ; ~ ~ ~~ `" v m ~ F y 6 c~ ~~._ DATE: 09/29/03 ~ = "g ° scA~E: 1" ~ 100 ~RGL'1W ~1'pIWR Y ~R®~7~®1`YI 1(C~~~/I ~~f~~G°a ~ ®R~I~IA~E PL~~I APPROVED FOR CONSTRUCTION BY: DATE: DIRECTOR OF PUBUC WORKS YELM WASHINGTON APPROVAL E%PIRES: ~Q ~~ y ~~ ~ ~ ~ D W ~ y ~ C7 .A 9 2 r r z IV ~ ' 9 ~ ~ a l7 zz i~ pF 9 Y ~ ~ "~ ~ /> ~ d O Q [ id Z (~ u e ti ~ C ~~ z F ~ a ~ o ~; °° z ,y `'~ ° 9 ~ a ~l o~~~ ~ ~T7 Z Y, C^~~ n ~r fTl O~ D C Z v .ZI 0 c z v 0 n D D --1 I O 0 ~• N ~+ I N W m O m O C _v i '~~ H ~ _°~ ~ o z ~ s ~ ~ I~ r ~, ~~~> ~ ~ e ~ ~ Y m ~ "~°, ~ - a ~ ~° ~ 8 ~ a f Tl m o ~°gA C~'iy ~_ ~ m nF~A ~ CJ ~ p ~ Y "m CIl z € ~ m~~ n ~ ~ U N;o ~ 9 z O g,p ~ I =m ~ ~ 0 O o~ o~ Z ~m o~ '-~ m ~ ~ '-3 ~ ~~ EA ~ .b < a >> AA n 22 ,~' -I i p O ~ y~ n o vi ~ y m ~ "~ ~ 4 y ~;p z / ~ D p yA m ~ ~ D ~ Y °' ~ m J N Ctl n ~ ~, ? III ~ z ° z m ~ ~ ~ _ 9 A 7' Z m m ~ -1 ~ p r ~ ~ z00 taCO~ x AC Op ~ \\\~~. N o mm x n A u F z~ uOUI ~ \\/~ o~ z~ ~ x z m m ~.~ ~ pQ-o---oo -; //~ 'Q m D (h O pi N w Q O ~ y N ~ u -~ op ~~ m O oDU =~ N A tl~o o ~~ o ~ S U ti~ m W ~\1 VI -1 ~I D D y~ ? W O U O VS A O~t1 O Z orn o ~ 0I iA Z m S D m j\\ ~- • ~ O O D O V N~ ~ ~~j\ ~ I l ~ n m~ O'd ~ N \ ~I z < t~00 m y m f~l ~ \ n r O~ N D F1 tDil \ v l r ~ O r ~ ur ~ x f-' O m D ~ ~ ~ o \ m l VI ~ D O ~ N o ~ A O r N = D \ ~\\/\~i ~ r 0 D m N Z \ \~ D ~N ~o m O m D ~ O r0 ~ \ -I ~ m z z -< A o -1 ~ ~O in r. z m Dm ~ rn~ NC ~ o ~'+ ~ o < A N~ ~~ 1 Z O rZON - ~ ~lmm m 1~~ 5=m p m r 2~0'I A Z j ~ Z p VI p 1NIOd HO1V0 A ;O m ~~ s Z Or ~ i C r m 44 F Z VIOL ~ ~ N ut A Z Z D yJ 1N3W35V3 0 ~ 3: m ~ A _ _ K AlllLL fl ~ N _ _ _ _ _ _ - _ _ _ _ _. _ - n~mn Z XlVM301S p' ., _ ~ A Z AO v ` ~ d1a15 a31NVld m cD'~DN A ° ~ m n' °a ~ cAi ~ ~ Z y O C Z 'N 3NVl O133Va1 m m = m ~ m a ono ° y DCZ _ ~ _ _ _ - D ~ `N 3NVl O133Va1 m _ _~~ o r51 z O ~ ~l m ~ n- ~ o ~ (7 ~ deals a3lNVla ., O - ~ ~ - _ j~ _ _ XlVM3O1S p! _ _ _ ~ .. , - _ - _ _ ~ ~ ~ f N 1N3W35V3 _ _ ~ _ _ , ~ m O C C '~ AlIILLN n o ~~ CO r~ ~?.~ fi < yz ~ ~~ g + N _ ~ 1NIOd NOl VO O /ll O A \ ~ ~ ~ In No o ~ zo rZON -' ~ m >;O~A m Arm O Z3:Om z ny;xl N ~ 2. ~Omti ~ z ~L ~ D Z y0 m O i° m -~ N 1NIOd HJ1VO < ~ zcno~ y - A _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ~; m y 1N3W35V3 0 O Vr AlIlLLO _ _ Zl n A o n m ~ X) C- l : d1a15 a3LNVld °~ - ~ _ _ _ _ _ ~ - - - _ A m s z ~ O Dp v) > N og~ [ ~ 3NIU10ld 3NVl DNINBVd u ~..... O O m _ \ (i In ~ ~~ ~~_ m g ~N 3NVl OI.1dVal ~~~~ -I _ -- - - ~ - _ - __ ~ _ ~ 3Ntll J133va1 - -~- 3NVl ONINiIVd 3wlMOu u o O ~+~, j J T O L d1a15 a31NVld o' ~J /V f-T1C7 ~ rl ~' -- NlVM3015 u _ _ - - ~ _ \ ------- (~ ~ O ~ ' l N 1N3W35V3 - - _ - _ ~ ~ ~ ~ Al Illl N D ~ o ~,+ ~ Z /~ m r j N J\ / (~( +7 r 1NIOd HJ1VJ D fTl o ' ~ ~ cn N ~l o ° ° ~~~ S. a F anin ^ ~ i 4 S~"a R ° ,"j S ~^$ ° "2 .. ~" xo ~ o m$ °Q ~ ~. p. p4pN SnS n~ ° 3xm° o..a °' w u•- °4i.+y 8 - 23n'gc?ots"2°i ~.~ "=p ~ m3 R=~ ".$$ ns? 08 ~ ° oR Y, ° S ° _ _ '°j S"n 3'v >u °~ -4~ 3~.i° v ° ° ~..° ° _ °$~~ g~;gg_a~. xo3gg °"~~a~=~,~ a^,°°~d° ;~ ~`>~ :.~$g„R_ -a°_~_°a aass~°~~Ao~4a.s~e~~>g°~sq-~- a o~"°~~ E~= -z~ °~ 83Ra8°vs~w ~~$~5 o~SR 3~=g 8'`F Q". ~„°~'° " '~'°°R°' s.~-;~;' „~°3~."•s~°g3R~3^"~8°a@ Z ~ '- ea°°-^ °a 3R^~°°~R =$o = -~ aR, g~ v~agf--xa'~ R og"° _ 3. 3~°~°°~cg$=~-. .. 3o,g°~;- ~~ a4g _ ,S R„"3°o ?~ - „x~a.Ngn~°~q3'S°a"~s~§ @?"_ ~9~~"~°~sa$=~~'oP°.°°,°.. y a '~~~ - 3aj', aog~g ~> -~~ ""~~" ~Pg~ a'R.^_"~ "°" a3"gam°°g`'~Fo=g3S2~°g ~ "°~°~3s~-$~~~0 3~Q0~~$°"°m~ R$Rb~ o~~ 3'x° 5,^e "9 ^Rm~n°g4g __„ gP-ez-.. 03=~ 3- „~„ U 3e3avo agc-~3~R~,~P3g a,~ots 3~~^ Ro°° ~3°n jR ~°3n °~R3 ~~ 3~0~ n'"`.•R 3„0„ ~3,a ;.a~~O3~9~~~$n~~»,~ a~ ao= xo'"~~x~sa ko;39Ro3s s` ~"° -~- ^;a ~~~ ;~$3°=- E3 - °r~_~ ae a o=~gg'm a;ss;~so ob:~ _ - ..3am° R^-~~°s< 3. Q4°° °o $_- a ;R9~~C'°°^ - ~~ _ °R"c$~~ gp ag 3 ~ i~s g33~s sR°°'$~-;m. 'QO8 3°3~ ~.gi ~~On°- o.3S ~ -O ~'q Y~„8 ~~'3~„. _~ - e': "' o_3 ox gx@ xao Rv nx wa$a3 Z R'° Ri="'3 ~ eo:'g »° '$~' '° s'S°5~ °- _ a~u •fi'~2= _'gg Rg~"x - A:F n'-~8 _g v3oR38 ^ga °`" e4.~3 b-o ~~,~°-"~°t4°' °go° °i u$ ~~2'~ x~~g c _$~.3 ,~.. c'~ °N§~ °m ~n$ ,~'0 5~ n'ge 5$".F x° 3O$b'° ~ `S u ~ $~ 3 . m a ~ n ' o R n - R i R 3 u o ° a 8 ~ ~ n' - ° ° ° $ 30 $ : i a x n 3''d ri °'_ ~ 3.3 ~ a 3 3 ' ^ R ° _ ' ° e ~ o x A 4 ~ a^_3 '8^^'-R~ :~„aRRo3eo~B °~~"._R ~ ~ 3'~io 3~8fF 3 °3 9"39o g$ge °~"" p$ 4 so; -_ °S~S~~ - ~~. z „ ~," ° ° aQ^iR°;4 vo»3 S .R o° 3.3Ro @ 3 ,n »g~o ^~Jx~ R°$ nY 3'°g°',~ 3R« ' a,.3 ~-- °' "3~4"3u=°i Bgao ~ R o°~ °s°x_ „ g8~°oi v 3e„g° o<- a .. xg _ ~,$Q -~ S °~a "e ~3 S3 ~- ° and ° R~.QC ~ ~ ~o~ oog 8 „ " 3a: R"°3 _'~n_ n 8 5.P_ ~~' ~~°°„3 a 3g- ° _ ° ~~~ °~g~o~ ~ ~ o ' ~n~ #uz~ ~ s ~~ ;°s3 Yo 3.Re - ~a a ~°_ Rya s° ~ ^ v ~~ R g o~ - ~ ~$_?~~~'R o v '~ $- a °'= o~ 0 3 "Ro x` sg~~ "g ° °~° ;-- '~Ba ~ ';g 3 ~ -- o- ° oa3^ ,- g 3 3, s z °ms - $~ - ~ ~~ nv, u ~ 55og 3° a ooa oss ~~~? ^' x °°~ R f R n ~ ° 3° a °~ v n ° ? ° 3 ° _ ~ y _ 3 a R n ° 3 ° °~ o °~ i° n $ b ~ ~ '3 ~ n' a" ~ n 4 g~~ ~ ° 3 0 „ ~ $ 3' " „ 9 n ~- 4 5 H g ~-a '` ~ 3 n o ° 3. ~ n n v " ^ °v - _ " 'S° _ - - ~ ° ~s = ° xs = a ° ~+ }~. ~ '~ ~" ~ ~ ~ DESIDNED BY: V.RJ ~ O 3 O N' 3 i~ b C.,~ DRAWN BY: DJO /1L ~' ~ °' 0 Z ~ O m; D1m m ~ , ~ ~ Q ~ CHECKED BY: ~ ~ A~~ Q UI m ~ J ~ F ~ y 6 c~ ~~._ DATE: 09/29/03 ~ g ~ SCALF: ~ ° v ~ DOS pR, ~I^~q/I~' I~ ~ PR~LIMIBR~~RyVp ®c~3~I~~G,E APPROVED FOR CONSTRUCTION BY: DATE: DIRECTOR OF PUBLIC WORKS YELM WASHINGTON APPROVAL EXPIRES: Appendix III FEMA Firm Map NATIONAL FLOOD INSURANCE PR06RAM FIRM FLOOD INSURANCE RATE MAP THURSTON COUNTY, WASHINGTON (IININCORPORATED AREAS) PANEL 365 OF 600 (SEE MAP INDEX FOR PANELS NOT PRINTED) COMMUNITY-PANEL NUMBER 530188 0365 C ',I~ ~ EFFECTIVE DATE: ~.iGY MAN .~ F ~° ~~~.,,,9o DECEMBER 1, 1982 -O~~ ~, ~i! `1t~ "L '__j jtij. ~~II ~ , a_ ~,~~ ~~~~-; s ~ l y_ ti Federal Emergency Management Agency ~ ~ N W ~ ~~ c~+ z v ~, v m ~ \ ~~ ~G D ~ 2 ~ U1 ~ °2\ ~ ° ~ ~ II• • . 2~ ' I I • II ~~ I ~.~n it ~ I\ li ~ ii u ~ II . . I I I/ I o ~~ I • // // I ° ° ° o II • ~ /~ ° ° ° • • ^ ~ ~ ° \ • O ° II II ---- - ---- -- R. 1 E. - ° • m I R. 2 E. oo ••II M/LL '°oo• •o •RDo ~ v ~ I ° o ~I °_ - ~ - - • D Z ~ . ~ ~ ~ o I I y -3 m _ I ~ ~~ Z o~ I I zt ~ I ~ o ~• it m II ~~ ., z ~ ~ °\ ~~ N I I D ~ ~~ O I I ~ o` ~ , m 41 0~ r I ° ° • C7 0 • o .. "' ~ ~ o ° . I I / D x I II • II 6 • ~ z ~ I ~ II . ~~ °: °o • CLARK °• II . ROAD m ° , n ° I °• • •O• ° • • •. •O •~ • ^ ^ • • o ~ 3 ~ • o ~ o 00~~° Z ~~ O ~ ~ y ~\ ~ • ~ n ~ . I ~ ~ • O • ~ Z °° • .. •° o °• D ° ~ ~ Z ~, W ~~ MORRiS • ROAD SOUTHEAST •~•• D • p• ~~ •• •^ \~ • ° • ° n • .^ • Appendix IV Soil Evaluation Report SOIL EVALUATION REPORT FORM 1: GENERAL SITE INFORMATION PROJECT TITLE: Yelm Terra Plat SHEET: 1 OF 1 PROJECT NO.: 03008 DATE: 8/11/03 PREPARED BY: William Parnell, P.E. 1. SITE ADDRESS OR LEGAL DESCRIPTION: Northwest corner of 105` Way SE and Clark Road SE intersection, Yelm Wa. TPN: 22730210500, 22730210600, 22730210700, 22730210800 2. PROJECT DESCRIPTION: Develop the parcels into 97 residential lots with all associated roadway, utility and landscaping improvements. 3. SITE DESCRIPTION: The 24.24 acre project site is occupied by one residential building (to be removed) centrally located on the northern 1/3 of the site. Site relief is relatively flat with no distinguishing features. Elevations range from a high of 352' on the eastern half of the site to a low of 346'~centrally located on the western property line. The site has a moderate density of old growth Fir trees in the central portion of the site. The remainder of the site is covered with a light to moderate density of Scotch Broom growth with indigenous field grasses. The project site is bounded by residential property to the north and west, Clark Road to the east and 105~h Way SE to the south. On site soils are well drained and formed in glacial outwash. 4. SUMMARY OF SOILS WORK PERFORMED: Six test pits were excavated by backhoe to a maximum depth of 186" below existing grade. Soils were inspected by entering and visually logging each test pit to a depth of four feet. Soils beyond four feet were inspected by examining backhoe tailings. Test pit soil log data sheets are included in this report. 5. ADDITIONAL SOILS WORK RECOMMENDED: Additional soils work should not be necessary unless drainage infiltration facilities are located outside the general area encompassed by the soil test pits. 6. FINDINGS: The Soil Conservation Service of Thurston County mapped the onsite soils as a Spanaway Gravelly Sandy Loam (110). All test pits confirm this designation. All test pits revealed very gravelly fine sandy loam surface soils, overlying a gravelly and cobbley coarse sand substratum. Substratum coarse soils were loose to slightly dense and had very few fines present. Winter water table was not present in any test pits. 7. RECOMMENDATIONS: The Spanaway soil series is a somewhat excessively drained soil that formed in glacial outwash. Infiltration rates are generally rapid in the substratum soils. The substratum soils should be targeted for all drainage infiltration facilities. A design infiltration rate of 20 in/hr or less would be appropriate for all targeted C horizon soils as recommended in the attached soil log information sheets. During construction, care must be taken to prevent erosion of exposed soils. Drainage facility infiltration surfaces must be property protected from contamination by the fine-grained upper horizon soils and from compaction by site construction activities. Soils not properly protected will cause drainage infiltration facilities to prematurely fail. I hereby certify that I prepared this report, and conducted or supervised the performance of related work. I certify that I am qualified to do this work. I represent my work to be complete an accurate within the bounds of uncertainty inhe t to the practice of soils science, and to be suitable for its intended use. ~ -a~-,,,., SIGNED: G~~ ` l:-:n ~„~ ')'' .; jfyyo',-:r/.~~„ ~, 6 DATE: ~' /i1 /~~ 3 ~~"'~~~ '~ {~~ y~~ ,9~ ~ ~o ~q ~~,~ ~~, 3 .+;- .~, ~~ US~GM,4 L ~' ~ ~~i S~ Ste- D$ SOIL EVALUATION REPORT FORM Z: SOIL LOG INFORMATION PROJECT TITLE: Yelm Terra SHEET: 1 OF 6 PROJECT N0.:03008 DATE: 6/26/03 PREPARED BY: William Parnell, P.E. SOIL LOG: #1 LOCATION: 220 ft. east and 130 ft. north of the S.E. property corner. 1. TYPES OF TEST DONE: 2. SCS SOILS SERIES: 3. LAND FORM: Double Ring Infiltration Spanaway Gravelly Sandy Terrace Loam (110) 4. DEPOSITION HISTORY: 5. HYDROLOGIC SOIL 6. DEPTH OF SEASONAL HW: Glacial ouiwash & volcanic ash GROUP: Unknown B 7. CURRENT WATER 8. DEPTH TO IMPERVIOUS 9. MISCELLANEOUS: DEPTH: LAYER: Level Greater than bottom of hole Greater than bottom of hole 10. POTENTIAL FOR: EROSION RUNOFF PONDING Slight Slow Minimal 11. SOIL STRATA DESCRIPTION: See Following chart 12. SITE PERCOLATION RATE: See FSP 13. FINDINGS & RECOMMENDATIONS: A double ring infiltration test completed at 84" below the existing grade yielded an infiltration rate of 80 in/hr. Use an infiltration rate of 20 in/hr or less for drainage infiltration facilities located in the C horizon soils at 25" or greater below the existing ground surface. Soils Strata Description Soil Log #1 f rz Depth Color Texture A 0"- 22" 10YR3/1 VGrVFiSaLm v 22"- 25" t0YR3/4 VGrSaLm C1 25"- 90" 10YR5/8 ExGr & CobLmCSa 90"-136" 10YR4/1 FiSa C3 136"-156" 10YR4/6 ExStFiSa 156"-168" 10YR5/4 ExGrC-MSa C5 168"-186" 10YR5/4 ExGrCSa with silt jackets %CL %ORG CF STR MOT IND CEM ROO <X> FSP <20 <5 <50 SG - - - mf 2-6 2 <15 - <60 SG - - - mf 2-6 3 <5 - <75 SG - - - ff >20 20 <5 - <20 SG - - - - >20 20 <5 - <98 SG - - - - >20 20 <5 - <95 SG - - - - >20 20 <5 - <90 SG - - - - >20 20 SOIL EVALUATION REPORT FORM 2: SOIL LOG INFORMATION PROJECT TITLE: Yelm Terra SHEET: 2 OF 6 PROJECT N0.:03008 DATE: 6!26/03 PREPARED BY: William Parnell, P.E. SOIL LOG: #2 LOCATION: 880 ft. east and 320 ft. north of the S.E. property comer. 1. TYPES OF TEST DONE: 2. SCS SOILS SERIES: 3. LAND FORM: Double Ring Infiltration Spanaway Gravelly Sandy Terrace Loam (110) 4. DEPOSITION HISTORY: 5. HYDROLOGIC SOIL 6. DEPTH OF SEASONAL HW: Glacial outwash & volcanic ash GROUP: Unknown B 7. CURRENT WATER 8. DEPTH TO IMPERVIOUS 9. MISCELLANEOUS: DEPTH: LAYER: Level Greater than bottom of hole Greater than bottom of hole 10. POTENTIAL FOR: EROSION RUNOFF PONDING Slight Slow Minimal 11. SOIL STRATA DESCRIPTION: See Following chart 12. SITE PERCOLATION RATE: See FSP 13. FINDINGS & RECOMMENDATIONS: A double ring infiltration test completed at 72"below the existing grade yielded an infiltration rate of 40 in/hr. Use an infiltration rate of 20 in/hr or less for drainage infiltration facilities located in the C horizon soils at 24" or greater below the existing ground surface. Soils Strata Description orz Depth Color Texture A 0"- 21" 10YR3/1 VGrVFiSaLm .w 21 "- 24" t OYR3/4 VGrSaLm C1 24"- 66" 10YR5/8 ExGr& CobLmC-MSa :2 66"-132" t0YR5/1 ExGr&CobC Sa 3 132"-156" 10YR4/6 ExGr&CobC- MSa Soil Log #2 %CL %ORG CF STR MOT IND CEM ROO <X> FSP <20 <5 <50 SG - - - mf 2-6 2 <15 - <60 SG - - - mf 2-6 3 <5 - <75 SG - - - mf >20 20 <5 - <80 SG - - - - >20 20 <5 - <90 SG - - - - >20 20 SOIL EVALUATION REPORT FORM 2: SOIL LOG INFORMATION PROJECT TITLE: Yelm Terra SHEET: 3 OF 6 PROJECT N0.:03008 DATE: 6/26/03 PREPARED BY: William Parnell, P.E. SOIL LOG: #3 LOCATION: 570 ft. east and 330 ft. north of the S.W. property comer. 1. TYPES OF TEST DONE: 2. SCS SOILS SERIES: 3. LAND FORM: Double Ring Infiltration Spanaway Gravelly Sandy Terrace Loam (110) 4. DEPOSITION HISTORY: 5. HYDROLOGIC SOIL 6. DEPTH OF SEASONAL HW: Glacial outwash & volcanic ash GROUP: Unknown B 7. CURRENT WATER 8. DEPTH TO IMPERVIOUS 9. MISCELLANEOUS: DEPTH: LAYER: Level Greater than bottom of hole Greater than bottom of hole 10. POTENTIAL FOR: EROSION RUNOFF PONDING Slight Slow Minimal 11. SOIL STRATA DESCRIPTION: See Following chart 12. SITE PERCOLATION RATE: See FSP 13. FINDINGS ~ RECOMMENDATIONS: A double ring infiltration test completed at 72" below the existing grade yielded an infiltration rate of 3600 in/hr. Use an infiltration rate of 20 in/hr or less for drainage infiltration facilities located in the C horizon soils at 22" or greater below the existing ground surface. Soils Strata Description 'orz Depth Color Texture A 0"- 18" 10YR3/1 VGrVFiSaLm Fw 18"- 22" 10YR3/3 ExGrBCob SaLm C1 22"- 36" t0YR4/6 ExGr&Cob LmCSa -2 36"- 72" 10YR4/6 ExGr&Cob C-MSa ~3 72"-156" 10YR5/2 VGrBCab CSa, some stones Soil Log #3 %CL %ORG CF STR MOT IND CEM ROO <X> FSP <20 <5 <50 SG - - - mf 2-6 2 <15 - <70 SG - - - mm 2-6 4 <10 - <75 SG - - - mm >20 20 <5 - <85 SG - - - mm >20 20 <5 - <90 SG - - - - >20 20 SOIL EVALUATION REPORT FORM 2: SOIL LOG INFORMATION PROJECT TITLE: Yelm Terra SHEET: 4 OF 6 PROJECT N0.:03008 DATE: 6/26/03 PREPARED BY: William Parnell, P.E. SOIL LOG: #4 LOCATION: 450 ft. east and 330 ft. north of the S.W. property corner. 1. TYPES OF TEST DONE: 2. SCS SOILS SERIES: 3. LAND FORM: Double Ring Infiltration Spanaway Gravelly Sandy Terrace Loam (110) 4. DEPOSITION HISTORY: 5. HYDROLOGIC SOIL 6. DEPTH OF SEASONAL HW: Glacial outwash & volcanic ash GROUP: Unknown B 7. CURRENT WATER 8. DEPTH TO IMPERVIOUS 9. MISCELLANEOUS: DEPTH:' LAYER: Level Greater than bottom of hole Greater than bottom of hole 10. POTENTIAL FOR: EROSION RUNOFF PONDING Slight Slow Minimal 11. SOIL STRATA DESCRIPTION: See Following chart 12. SITE PERCOLATION RATE: See FSP 13. FINDINGS & RECOMMENDATIONS: A double ring infiltration test completed at 72" below the existing grade yielded an infiltration rate of 1080 in/hr. Use an infiltration rate of 20 in/hr or less for drainage infiltration facilities located in the C horizon soils at 24" or greater below the existing ground surface. Soils Strata Description Hoe Depth Color Texture 0"- 20" 10YR3/1 VGrVFiSaLm o~+v 20"- 24" t0YR3/3 ExGr&Cob SaLm I 24"- 36" 10YR4/6 ExGrBCob LmMSa C2 36"- 72" 10YR4/6 ExGr&Cob CSa t,3 72"-144" 10YR5l2 ExGrBCob CSa, some stones Soil Log #4 %CL %ORG CF STR MOT IND CEM ROO <X> FSP <20 <5 <50 SG - - - mf 2-6 2 <15 - <70 SG - - - mm 2-6 4 <10 - <75 SG - - - mm >20 20 <5 - <85 SG - - - mm >20 20 <5 - <95 SG - - - - >20 20 SOIL EVALUATION REPORT FORM 2: SOIL LOG INFORMATION PROJECT TITLE: Yelm Terra SHEET: 5 OF 6 PROJECT N0.:03008 DATE: 6/26/03 PREPARED BY: William Parnell, P.E. SOIL LOG: #5 LOCATION: 350 ft. east and 330 ft. north of the S.W. property comer. 1. TYPES OF TEST DONE: 2. SCS SOILS SERIES: 3. LAND FORM: Double Ring Infiltration Spanaway Gravelly Sandy Terrace Loam (110) 4. DEPOSITION HISTORY: 5. HYDROLOGIC SOIL 6. DEPTH OF SEASONAL HW: Glacial ouiwash & volcanic ash GROUP: Unknown B 7. CURRENT WATER 8. DEPTH TO IMPERVIOUS 9. MISCELLANEOUS: DEPTH: LAYER: Level Greater than bottom of hole Greater than bottom of hole 10. POTENTIAL FOR: EROSION RUNOFF PONDING Slight Slow Minimal 11. SOIL STRATA DESCRIPTION: See Following chart 12. SITE PERCOLATION RATE: See FSP 13. FINDINGS & RECOMMENDATIONS: A double ring infiltration test completed at 72" below the existing grade yielded an infiltration rate of 540 in/hr. Use an infiltration rate of 20 in/hr or less for drainage infiltration facilities located in the C horizon soils at 36" or greater below the existing ground surface. Soils Strata Description Horz Depth Color Texture ~ 0"- 12" 10YR3/1 VGrVFiSaLm Bw 12"- 36" 10YR3/3 ExGrBCob SaLm 1 36"- 72" 10YR4/6 ExGr&Cob CSa " 2 72"-144" 10YR5/2 ExGr&Cob CSa, some stones Soil Log #5 %CL %ORG CF STR MOT IND CEM ROO <X> FSP <20 <5 <50 SG - - - mf 2-6 2 <15 - <70 SG - - - mm 2-6 4 <5 - <85 SG - - - mm >20 20 <5 - <95 SG - - - - >20 20 SOIL EVALUATION REPORT FORM 2: SOIL LOG INFORMATION PROJECT TITLE: Yelm Terra SHEET: 6 OF 6 PROJECT N0.:03008 DATE: 6/26/03 PREPARED BY: William Parnell, P.E. SOIL LOG: #6 LOCATION: 50 ft. east and 80 ft. north of the S.W. property comer. 1. TYPES OF TEST DONE: 2. SCS SOILS SERIES: 3. LAND FORM: Double Ring Infiltration Spanaway Gravelly Sandy Terrace Loam (110) 4. DEPOSITION HISTORY: 5. HYDROLOGIC SOIL 6. DEPTH OF SEASONAL HW: Glacial outwash 8~ volcanic ash GROUP: Unknown B 7. CURRENT WATER 8. DEPTH TO IMPERVIOUS 9. MISCELLANEOUS: DEPTH: LAYER: Level Greater than bottom of hole Greater than bottom of hole 10. POTENTIAL FOR: EROSION RUNOFF PONDING Slight Slow Minimal 11. SOIL STRATA DESCRIPTION: See Following chart 12. SITE PERCOLATION RATE: See FSP 13. FINDINGS & RECOMMENDATIONS: A double ring infiltration test completed at 48" below the existing grade yielded an infiltration rate of 360 in/hr. Use an infiltration rate of 20 in/hr or less for drainage infiltration facilities located in the C horizon soils at 23" or greater below the existing ground surface. Soils Strata Description Horz Depth Color Texture A 0"- 20" 10YR3/1 VGrVFiSaLm Bw 20"- 23" 10YR3/3 ExGr&Cob SaLm ~1 23"- 48" t0YR4l6 ExGr&Cob CSa ~2 48"-120" 10YR5/2 ExGrCSa Soil Log #6 %CL %ORG CF STR MOT IND CEM ROO <X> FSP <20 <5 <50 SG - - - mf 2-6 2 <15 - <70 SG - - - mm 2-6 4 <5 - <90 SG - - - - >20 20 <5 - <95 SG - - - - >20 20 Abbreviations Textural Class (Texture) Structure (STR) Grades of Structure Cobble -Cob Granular - Gr Stron - 3 Stoney - St Blocky - Blky Moderate - 2 Gravelly - Gr Platy - PI Weak - 1 Sand - Sa Massive - Mas Loamy - Lm Single Grained - SG Silt - Si Sub-An ular Block - SBK Clayey - CI Coarse - C Ve - V Extremely - Ex Fine - F Medium - M Induration ~ Cementation (IND) (CEM) Weak - Wk Moderate -Mod Strong - Str Mottles (MOT) 1 Letter Abundance 1st Number Size Znd Letter Contrast Few - F Fine - 1 Faint - F Common - C Medium - 2 Distinct - D Many - M Coarse - 3 Prominent - P Roots (ROO) 1st Letter Abundance 2nd Letter Size Few - f Fine - f Common - c Medium - m Many - m Coarse - c <X> -Generalized range of infiltration rates from SCS soil survey (<X>) FSP -Estimated Field Saturated Percolation rate based on horizon specific factors. YELM TERRA PLAT DOUBLE RING INFILTRATION TEST Test Date : 7/16/2003 Completed By : William Parnell, PE DOUBLE RING INFILTRATION TEST RESULTS Test Hole # 1 (test run @ 84" below existing ground surface ) Start Sto Ela sed Time Total Dro Infiltration Rate ( Min) (Min) (Min) (Inches) (In/Hr ) 0 4' 00" 4' 00" 6 4' 00" 8' 30" 4' 30" 6 8' 30" 13' 00" 4' 30" 6 13' 00" 17' 30" 4' 30" 6 17' 30" 22' 00" 4' 30" 6 22' 00" 26' 30" 4' 30" 6 26' 30" 31' 00" 4' 30" 6 31' 00" 35' 30" 4' 30" 6 80 YELM TERRA PLAT DOUBLE RING INFILTRATION TEST Test Date : 6/26/2003 Completed By : William Parnell, PE DOUBLE RING INFILTRATION TEST RESULTS Test Hole # 2 (test run @ 72" below existing ground surface ) Start Sto Ela sed Time Total Dro Infiltration Rate ( Min) (Min) (Min) (Inches) (In/Hr ) 0 2' 15" 2' 15" 6 2' 15" 5' 45" 3' 30" 6 5' 45" 11' 15" 5' 30" 6 11' 15" 17' 45" 6' 30" 6 17' 45" 23' 00" 5' 15" 6 23' 00" 28' 30" 5' 30" 6 28' 30" 33' 30" 5' 00" 6 33' 30" 39' 00" 5' 30" 6 39' 00" 44' 00" 5' 00" 6 44' 00" 50' 30" 6' 30" 6 50' 30" 58' 00" 7' 30" 6 58' 00" 1:06' 30" 8' 30" 6 1:06' 30" 1:15' 30" 9' 00" 6 1:15' 30" 1:24' 30" 9' 00" 6 1:24' 30" 1: 33' 30" 9' 00" 6 1: 33' 30" 1:42' 30" 9' 00" 6 1: 42' 30" 1:51' 30" 9' 00" 6 40 YELM TERRA PLAT DOUBLE RING INFILTRATION TEST Test Date : 6/26/2003 Completed By : William Parnell, PE DOUBLE RING INFILTRATION TEST RESULTS Test Hole # 3 (test run @ 72" below existing ground surface ) Start Sto Ela sed Time Total Dro Infiltration Rate ( Min) (Min) (Min) (Inches) (In/Hr ) 0 0' 03" 0' 03" 6 0' 03" 0' 08" 0' 05" 6 0' 08" 0' 13" 0' 05" 6 0' 13" 0' 18" 0' 05" 6 0' 18" 0' 23" 0' 05" 6 0' 23" 0' 28" 0' 05" 6 0' 28" 0' 34" 0' 06" 6 0' 34" 0' 39" 0' 05" 6 0' 39" 0' 45" 0' 06" 6 0' 45" 0' S 1 " 0' 06" 6 0' 51 " 0' S7" 0' 06" 6 0' 57" 1' 03" 0' 06" 6 1' 03" 1' 09" 0' 06" 6 1' 09" 1' 15" 0' 06" 6 3600 YELM TERRA PLAT DOUBLE RING INFILTRATION TEST Test Date : 6/26/2003 Completed By : William Parnell, PE DOUBLE RING INFILTRATION TEST RESULTS Test Hole # 4 (test run @ 72" below existing ground surface ) Start Sto Ela sed Time Total Dro Infiltration Rate ( Min) (Min) (Min) (Inches) (In/Hr ) 0 0' 15" 0' 15" 6 0' 15" 0' 30" 0' 15" 6 0' 30" 0' 45" 0' 15" 6 0' 45" 1' 05" 0' 20" 6 1' 05" 1' 25" 0' 20" 6 1' 25" 1' 45" 0' 20" 6 1' 45" 2' OS" 0' 20" 6 2' 05" 2' 25" 0' 20" 6 2' 25" 2' 45" 0' 20" 6 2' 45" 3' 05" 0' 20" 6 3' 05" 3' 25" 0' 20" 6 3' 25" 3' 45" 0' 20" 6 3' 45" 4' 05" 0' 20" 6 1080 YELM TERRA PLAT DOUBLE RING INFILTRATION TEST Test Date : 6/26/2003 Completed By : William Parnell, PE DOUBLE RING INFILTRATION TEST RESULTS Test Hole # 5 (test run @ 72" below existing ground surface ) Start Sto Ela sed Time Total Dro Infiltration Rate ( Min) (Min) (Min) (Inches) (In/Hr ) 0 0'15" 0'15" 6 0' 15" 0' 35" 0' 20" 6 0' 35" 1' 00" 0' 25" 6 1' 00" 1' 25" 0' 25" 6 1' 25" 1' S0" 0' 25" 6 1' 50" 2' 10" 0' 20" 6 2' 10" 2' 40" 0' 30" 6 2' 40" 3' 10" 0' 30" 6 3' 10" 3' 45" 0' 35" 6 3' 45" 4' 30" 0' 45" 6 4' 30" 5' 10" 0' 40" 6 5' 10" 5' S0" 0' 40" 6 5' S0" 6' 30" 0' 40" 6 6' 30" 7' 10" 0' 40" 6 540 YELM TERRA PLAT DOUBLE RING INFILTRATION TEST Test Date : 6/27/2003 Completed By : William Parnell, PE DOUBLE RING INFILTRATION TEST RESULTS Test Hole # 6 (test run @ 48" below existing ground surface ) Start Sto Ela sed Time Total Dro Infiltration Rate ( Min) (Min) (Min) (Inches) (In/Hr ) 0 0' 30" 0' 30" 6 0' 30" 1' 15" 0' 45" 6 1' 15" 2' 15" 1' 00" 6 2' 15" 3' 15" 1' 00" 6 3' 15" 4' 15" 1' 00" 6 4' 15" 5' 15" 1' 00" 6 5' 15" 6' 15" 1' 00" 6 6' 15" 7' 15" 1' 00" 6 7' 15" 8' 15" 1' 00" 6 8' 15" 9' 15" 1' 00" 6 9' 15" 10' 15" 1' 00" 6 10' 15" 11' 15" 1' 00" 6 11' 15" 12' 15" 1' 00" 6 360 Appendix V Vicinity Map (n ~ H Z ~- _ _ ___ 0 ° ~32~~ ~ -_ _ ._ _ __ ~ ~ II~Nb~ ~~b'~~ ~ __ rn O lb ~ ~~ ~ ~ oP `n G ~ 11~w \ _. _. . , ~~ o W Z \ o J ~ J . W~ ,J ` ~ Q ~~ \ y ~ ~~ w ~ ~ o ~ (`~ o ~ o Q w ~ ~ ~ U H Z ~ U W > ~ >' a _.~.~o 1: °' ~ , ~U