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HomeMy WebLinkAboutRS_May Creek Trail South_DrainageReport_60pct_9.30.24MAY CREEK TRAIL SOUTH 60% DESIGN PHASE DRAINAGE REPORT CITY OF RENTON – PARKS PLANNING AND DEVELOPMENT PROJECT NO.: 30902211 SEPTEMBER 2024 WSP USA 1201 PACIFIC AVE. SUITE 550 TACOMA, WA 98402 PHONE: +1 206-431-2300 WSP.COM MAY CREEK TRAIL SOUTH WSP60% Design Phase Drainage Report WSP.com City of Renton – PARKS PLANNING AND DEVELOPMENT Page i TABLE OF CONTENTS 1 PROJECT OVERVIEW .......................................................... 1 1.1 INTRODUCTION .................................................................................... 1 1.2 Purpose of Report ............................................................................... 1 1.3 Site Description ................................................................................... 1 2 CONDITIONS AND REQUIREMENTS SUMMARY 3 2.1 Conditions ..............................................................................................3 2.1.1 Predeveloped Conditions ............................................................................................................ 3 2.1.2 Developed Conditions ................................................................................................................... 3 2.1.3 Soils and Groundwater.................................................................................................................. 4 2.2 Core Requirements Summary ......................................................4 3 OFFSITE ANALYSIS .............................................................. 6 3.1 Project Study Area ............................................................................ 6 3.2 Resource Review .................................................................................7 3.3 Field Inspection ...................................................................................7 3.4 Drainage System Descriptions .....................................................7 4 FLOW CONTROL, LOW IMPACT DEVELOPMENT, AND WATER QUALITY FACILITY ANALYSIS AND DESIGN........................................................................................ 9 4.1 Flow Control ......................................................................................... 9 4.2 Water Quality ...................................................................................... 9 4.3 On-Site BMPs ..................................................................................... 10 5 CONVEYANCE SYSTEM ANALYSIS AND DESIGN11 5.1 Lake Washington Blvd N ................................................................ 11 5.2 May Creek South Trail ...................................................................... 11 MAY CREEK TRAIL SOUTH WSP60% Design Phase Drainage Report WSP.com City of Renton – PARKS PLANNING AND DEVELOPMENT Page ii 6 SPECIAL REPORTS AND STUDIES ............................. 12 7 OTHER PERMITS .................................................................. 13 8 CONSTRUCTION STORMWATER POLLUTION PREVENTION PLAN ANALYSIS AND DESIGN ..... 14 9 BOND QUANTITIES, FACILITY SUMMARIES, AND DECLARATION OF COVENANT.................................... 15 10 OPERATIONS AND MAINTENANCE MANUAL .... 16 11 REFERENCES ......................................................................... 17 APPENDICES A FIRM PANEL B EXHIBITS B-1 SURFACE TYPE EXHIBITS B-2 HYDROLOGY EXHIBITS C HYDRAULICS C-1 WWHM RESULTS C-2 HYDRAULIC CALCULATIONS D SITE AND OFFSITE ANALYSIS PHOTOS E CITY OF RENTON COORDINATION F AS-BUILT DATA TABLES TABLE 2-1 CORE REQUIREMENTS SUMMARY ............................................ 4 TABLE 4-1 100-YEAR PEAK FLOW COMPARISON ..................................... 9 TABLE 4-2 COMPARISON OF NEW VERSUS EXISTING SURFACE AREAS ...................................................................... 10 TABLE 4-3 BMP TARGET SURFACES ............................................................... 10 TABLE 4-4 ON-SITE BMPS ...................................................................................... 10 FIGURES FIGURE 1-1 THRESHOLD DISCHARGE AREAS .............................................. 2 FIGURE 3-1 PROJECT SITE ........................................................................................ 6 MAY CREEK TRAIL SOUTH WSP60% Design Phase Drainage Report WSP.com City of Renton – PARKS PLANNING AND DEVELOPMENT Page iv ACRONYMS AND ABBREVIATIONS ACRONYM DEFINITION 2022 RSWDM 2022 City of Renton Surface Water Design Manual ac Acre, Acres Ave Avenue Blvd Boulevard BMP Best Management Practice cfs Cubic Feet per Second COR City of Renton FEMA Federal Emergency Management Agency FHWA Federal Highway Administration FIRM Flood Insurance Rate Map FRP Fiberglass reinforced plastic ft Foot, Feet in Inch PGIS Pollution-generating impervious surface PGPS Pollution-generating pervious surface Project May Creek Trail South Project sf Square foot, Square feet TDA Threshold Discharge Area MAY CREEK TRAIL SOUTH WSP60% Design Phase Drainage Report WSP.com City of Renton – PARKS PLANNING AND DEVELOPMENT Page 1 1 PROJECT OVERVIEW 1.1 INTRODUCTION The May Creek Trail South project (Project) will expand the existing soft surface trail system within the May Creek Greenway and provide minor frontage road improvements along Lake Washington Boulevard N. There is an existing trail that runs along the north side of May Creek; it was originally constructed in 2012 and extended in 2018. The new trail will be constructed along the south side of May Creek and will connect to the north side trail via a new bridge. The southside trail will be composed of a combination of soft surface trail, boardwalk, a prefabricated aluminum bridge. The trail is also passing through existing wetlands and the work will include wetland and riparian enhancement. The trail will be approximately one-quarter mile in length, with two spurs leading to viewing areas. The boardwalk sections will be located where the trail crosses above wetlands. The frontage road improvements will include an extension of the existing sidewalk, curb and gutter, connecting the north and south trail entrances along a portion of Lake Washington Blvd N that will comply with the City of Renton’s Complete Street Standards. The project is located entirely within the City of Renton (COR), Washington. The project is in the May Creek Greenway at May Creek Park at 4260 Lake Washington Blvd N. This drainage report documents the drainage analysis for this project. The requirements for drainage analysis are based on the 2022 City of Renton Surface Water Design Manual (2022 RSWDM). 1.2 PURPOSE OF REPORT The purpose of this report is to describe and document the hydrologic and hydraulic conditions of the project site using established procedures and methodologies according to the 2022 RSDWM as well as to describe how the project will satisfy the City’s applicable drainage minimum and special requirements. The storm drainage requirements discussed in this report are based on a 60% level design and will need to be revisited as design progresses. 1.3 SITE DESCRIPTION The COR is constructing a trail extension within the existing May Creek Greenway Park on a parcel that runs along the easterly side of Lake Washington Blvd N between Wells Ave North and North 43rd Street. May Creek runs roughly through the center of this parcel, flowing from southeast to northwest. A portion of the parcel lies within a flood hazard zone that has been designated Special Flood Hazard Zone AE. The trail extension will run to the south of May Creek, just outside the Special Flood Hazard Zone. Four wetlands and several mature trees have been identified on the parcel. Steep slope hazard areas are also present within the site, primarily on the southern portion of the parcel. The May Creek Greenway Park is owned and maintained by the COR. The Project site also consists of a 100 ft long segment of Lake Washington Blvd N that runs along the northwestern edge of the parcel containing the trail extension. Lake Washington Blvd N is a two-lane Collector Arterial with an existing right-of-way width of approximately 60 ft and bike lanes in each direction. The posted speed limit is 25 miles per hour. The project can be considered one threshold discharge area (TDA) as all parts of the project site discharge into May Creek within ¼ mile. TDA 1 includes both the trail extension improvements and the Lake Washington Blvd N frontage road improvements. It has been evaluated as a site redevelopment package. M AY C RE EK LAKE WASHINGTON BLVD N I- 4 0 5 N 41ST ST Source: Esri, Maxar, Earthstar Geographics, and the GIS User Community Legend TDA 1 May Creek South_Trail Wetlands Parcels Existing Stormwater Pipes ¯ 0 100 200 300 40050Feet MAY CREEK TRAIL SOUTH WSP60% Design Phase Drainage Report WSP.com City of Renton – PARKS PLANNING AND DEVELOPMENT Page 3 2 CONDITIONS AND REQUIREMENTS SUMMARY Per Figure 1.1.2.A of the 2022 RSWDM, this project is subject to a Full Drainage Review. This type of development determines the Target Impervious Surfaces that are required to be mitigated by Core Requirement #3 (Flow Control Facilities), Core Requirement #8 (Water Quality Facilities), and Core Requirement #9 (On-Site BMPs). The Project is classified as a redevelopment with greater than 5,000 square feet impervious and improvements greater than 50% of the assessed value of the existing site improvements. Therefore, the Target Impervious Surfaces include new impervious surface (Core Requirement #3), new plus replaced impervious surface (Core Requirement #9), and new plus replaced PGIS (Core Requirement #8). The required core and special requirements for a Full Drainage Review were reviewed for applicability to the Project’s proposed improvements. 2.1 CONDITIONS 2.1.1 PREDEVELOPED CONDITIONS LAKE WASHINGTON BLVD N Stormwater runoff from the Lake Washington Blvd N portion of TDA 1 is collected in a system of vegetated swales and culverts on the southeast side of Lake Washington Blvd N. The flow from this system of swales and culverts outlets into Wetland A, where it merges with runoff from the May Creek South Trail portion of TDA 1 and then outfalls into May Creek. MAY CREEK SOUTH TRAIL Stormwater runoff from the proposed May Creek South Trail portion of TDA 1 travels as sheet flow generally from the sloped area along the southerly portion of the parcel. The runoff travels to either the flatter part of the site or to a wetland and finally flows into May Creek. 2.1.2 DEVELOPED CONDITIONS LAKE WASHINGTON BLVD N Lake Washington Blvd N improvements include approximately 150 linear feet of 5-foot wide sidewalk, curb, and gutter (new PGIS) adjacent to the northbound lanes from the new May Creek South Trailhead to connect to the existing sidewalk, curb, and gutter on the Lake Washington Blvd bridge over May Creek. In addition, there will be approximately 100 feet of 2 inch grind and overlay adjacent to the new sidewalk, curb, and gutter until the improvements meet the bridge. There is a proposed catch basin at the downstream end of the new curb and gutter to capture the flow from the added impervious areas of the frontage road improvements that will discharge via 12” storm drain into Wetland A and eventually May Creek. The existing system of vegetated swales and culverts on the southeast side of Lake Washington Blvd N, upstream of the improvements, will not be impacted and the stormwater runoff to this system will not change except for the replacement of a 12” culvert that is in bad condition (See Section 3 for further information). In addition to these improvements, there will also be re-striping over existing pavement with a revised lane configuration for approximately 400 feet on Lake Washington Blvd N, but this will not have any drainage impacts. MAY CREEK TRAIL SOUTH WSP60% Design Phase Drainage Report WSP.com City of Renton – PARKS PLANNING AND DEVELOPMENT Page 4 MAY CREEK SOUTH TRAIL The parcel will be redeveloped to include a trail along the southern side of May Creek that will connect to the existing northern trail via an engineered prefabricated aluminum bridge. The trail will be composed of alternating segments of bark mulch surfacing and fiberglass reinforced plastic (FRP) Grating surfacing. The proposed trail is considered new impervious surface, but it is not a pollution generating impervious surface. There are 4 V-Ditches and 5 culverts designed to intercept upslope runoff prior to reaching the new trail and maintain existing conditions by routing it to the same respective Wetlands and eventually into May Creek. CORE REQUIREMENTS The target surfaces being added or replaced will not require flow control per Core Requirement #3, nor treatment for water quality per Core Requirement #8. Flow control is not required because TDA 1 qualifies for Exemption #2 as the increase in 100-year peak flow is less than 0.15 cfs when comparing existing vs. proposed site conditions. Further discussion is in section 4.1.1. For Core Requirement #8, TDA 1 qualifies for Exemption #1 as the new plus replaced PGIS is less than 5,000 sf and less than ¾ acre of new PGPS will be added. See section 4.1.2 for further information. 2.1.3 SOILS AND GROUNDWATER Geotechnical investigations were conducted by PanGeo Incorporated in March 2023. The water table is found at a depth of 2 ft below the surface and are expected to fluctuate with seasonal flow changes in the creek. Per the investigations, soils were characterized as alluvium and colluvium overlying glacial outwash material and glaciolacustrine material. 2.2 CORE REQUIREMENTS SUMMARY Table 2-1 summarizes each core requirement and special requirement in the 2022 RSWDM and its applicability to the project. Table 2-1 Core Requirements Summary REQUIREMENT NUMBER REQUIREMENT NAME HOW WILL THE REQUIREMENT BE SATISFIED? CR 1 Discharge at the Natural Location The existing locations of drainage discharge location from the site will be maintained CR 2 Offsite Analysis An offsite analysis was conducted.See Section 3 of this report. CR 3 Flow Control Flow control is not required for the improvements. See discussion in Sections 4.1.1 and 4.2.1 of this report. CR 4 Conveyance System All new conveyance system elements have been analyzed, designed, and constructed in accordance with Section 1.2.4.1 of the 2022 RSWDM. CR 5 Construction Stormwater Pollution Prevention Erosion and sediment control measures and stormwater pollution prevention and spill control measures will be applied through a construction stormwater pollution prevention plan CR 6 Maintenance and Operations All drainage facilities are publicly owned and maintained by the City of Renton. MAY CREEK TRAIL SOUTH WSP60% Design Phase Drainage Report WSP.com City of Renton – PARKS PLANNING AND DEVELOPMENT Page 5 CR 7 Financial Guarantees and Liabilities Not required for the project because the project is implemented by the City of Renton. CR 8 Water Quality Water quality treatment is not required for the improvements. See discussion in Sections 4.1.2 and 4.2.2 of this report. CR 9 On-Site BMPs While On-Site BMPs are required for the project improvements, it is not feasible to provide due to proximity of discharge locations to steep slope hazard areas. See discussion in Sections 4.1.3 and 4.2.3 of this report. SR 1 Other Adopted Area- Specific Requirements The project also must comply with requirements from the City of Renton Shoreline Master Program. SR 2 Flood Hazard Area Delineation A portion of the project lies within a flood hazard area (type AE). This area has been delineated on project plans. Refer to FIRM panel in Appendix A. SR 3 Flood Protection Facilities This requirement does not apply because the project does not rely on an existing flood protection facility nor is it modifying or constructing a new flood protection facility. SR 4 Source Control The project improvements do not include any activities that require source control. SR 5 Oil Control The project improvements do not include any activities that require oil control. SR 6 Aquifer Protection Areas This requirement does not apply because the project is not located within an Aquifer Protection Area. MAY CREEK TRAIL SOUTH WSP60% Design Phase Drainage Report WSP.com City of Renton – PARKS PLANNING AND DEVELOPMENT Page 6 3 OFFSITE ANALYSIS Per section 1.2.2 of the 2022 RSWDM, an offsite analysis is required for the project to identify and evaluate any offsite flooding, erosion, and water quality problems that may be caused by the project. The offsite analysis is composed primarily of a Level 1 downstream analysis that examines the drainage system one-quarter mile downstream of the project and secondarily, an evaluation of the upstream drainage system to verify that the project will not cause significant flooding and erosion impacts. The Level 1 downstream analysis per Section 1.2.2.1 of the 2022 RWSDM is composed of the following: Task 1: Define and map the study area Task 2: Review all available information on the study area Task 3: Field inspect the study area Task 4: Describe the drainage system, and its existing and predicted drainage and water quality problems 3.1 PROJECT STUDY AREA The approximately 1.7-acre project site is located between Lake Washington Boulevard North, Interstate-405, North 41st Street and North 43rd Street. Project study area shown in Figure 3-1. Figure 3-1 Project Site MAY CREEK TRAIL SOUTH WSP60% Design Phase Drainage Report WSP.com City of Renton – PARKS PLANNING AND DEVELOPMENT Page 7 3.2 RESOURCE REVIEW The following documents were reviewed for the project: Federal Emergency Management Agency (FEMA) Flood Insurance Rate Map (FIRM) – Attached in Appendix A 2022 RWSDM City of Renton Online GIS https://maps.rentonwa.gov/Html5viewer/Index.html?viewer=cormaps City of Renton Surface Water Utility System Plan, December 2021 (Osborn Consulting, 2021) U.S. Department of Agriculture, Natural Resources Conservation Service Web Soil Survey https://websoilsurvey.nrcs.usda.gov/app/ U.S. Fish and Wildlife Service Wetlands Mapper https://www.fws.gov/program/national-wetlands- inventory/wetlands-mapper Washington Department of Ecology Water Quality Atlas https://apps.ecology.wa.gov/waterqualityatlas/wqa/map 3.3 FIELD INSPECTION A field visit was performed as part of the offsite analysis on March 15, 2024. Photos from the inspection are included in Appendix D. The field inspection observations were used to help document the drainage system description in Section 3.4 below. No evidence of existing or potential drainage or erosion problems were observed in the field inspection. 3.4 DRAINAGE SYSTEM DESCRIPTIONS Downstream Analysis Description For Lake Washington Blvd N, runoff from the existing road flows into a shallow grassy ditch on the east side of the road and continues northwards in an alternating system of ditches and 12 inch corrugated metal culverts before outletting into Wetland A (See Figure 3-1) within TDA 1. Wetland A is a wetland that has a positive grade with flow path that eventually discharges into May Creek. Runoff from the May Creek South Trail portion of TDA 1 sheet flows either directly to May Creek or first to Wetland A or Wetland C and then to May Creek. Flow in May Creek leaves the site near the northwestern corner of the site, crosses under the Lake Washington N bridge, where it meets the flow path from the western half of Lake Washington Blvd N. May Creek then continues under the Eastrail multi-use trail bridge and then turns to continue in a southwest direction, passes under the N 40th Place bridge and then discharges into Lake Washington about ¼ mile from the project site. Upstream Analysis Description There are two upstream flow paths. One is the May Creek watershed, which is approximately 14 square miles in area. The other is an upstream flow path for Lake Washington Blvd N. Approximately 350 feet upstream of the site, May Creek passes under Interstate 405 via a bridge crossing. According to the Renton 2021 Surface Water Utility System Plan, no flowing problems are reported along the main stem of the creek near the project site. The other flow path upstream of the project area is along Lake Washington Blvd N through a system of 12” pipes and ditches that run along the southeast side of Lake Washington Blvd N from North 40th Street to Wetland A.This system of pipes and ditches convey flows from residential properties located between North 40th Street and Lake Washington Blvd N. One of these properties is the Eastport Shores Condominiums which incorporates an existing Elliptical Holding Tank. This tank was modeled in WHHM Model 2 for offsite conditions and pipe sizing analysis and is included in Appendices C and F. There are no anticipated impacts to this system from the project. MAY CREEK TRAIL SOUTH WSP60% Design Phase Drainage Report WSP.com City of Renton – PARKS PLANNING AND DEVELOPMENT Page 8 Problem Descriptions Per the Washington Department of Ecology Water Quality Atlas, May Creek is designated a Category 5 waterbody for temperature, fecal coliform, and Category 2 for dissolved oxygen. No turbidity, phosphorus or high Ph problems have been reported. The project will have a minimal increase in PGIS, which will not require flow control treatment nor water quality treatment. The project is not expected to impact runoff volumes or water quality. Based on the findings from the Level 1 Analysis, the project is not expected to cause any new or aggravate any existing downstream flooding, erosion, or water quality problems within a quarter mile from the project site. MAY CREEK TRAIL SOUTH WSP60% Design Phase Drainage Report WSP.com City of Renton – PARKS PLANNING AND DEVELOPMENT Page 9 4 FLOW CONTROL, LOW IMPACT DEVELOPMENT, AND WATER QUALITY FACILITY ANALYSIS AND DESIGN The surface area changes for this project have been reviewed against the Core Requirements #3, #8, and #9 in the 2022 RSWDM as a site redevelopment project. This is classified as a site redevelopment project as there are new impervious surfaces proposed on a site that is already substantially developed. The new improvements are consistent with the site’s current land use as an open space/park and the new impervious surfaces are not for residential subdivision or maintenance purposes. Exhibits included in Appendix B show the surface types for TDA 1. 4.1 FLOW CONTROL TDA 1 does not qualify for the basic exemption as there is more than 5,000 square feet of new plus replaced impervious surface. TDA 1 is located within the Existing Condition Flow Control Duration Standard area. The target surface for the Existing Condition Flow Control Duration Standard area are new impervious surfaces only. Exemption #2 for Core Requirement #3 in the 2022 RSWDM states that flow control is waived for any threshold discharge area in which developed 100-year peak flows for target surfaces is no greater than a 0.15 cfs difference than historical conditions. Per coordination with the COR (Appendix E), the COR clarified that the intent of this exemption is to compare flows to the existing site conditions and not the historical. The WWHM modeling results are included in Appendix B and are summarized in Table 4-1. Based on these results, the difference is less than 0.15-cfs, which means that TDA 1 meets the requirements for Exemption #2 and no flow control is required. Table 4-1 100-year Peak Flow Comparison Site Condition 100-Year Peak Flow (cfs) Existing 0.12 Proposed 0.20 Difference 0.08 4.2 WATER QUALITY TDA 1 qualifies for Exemption #1 to Core Requirement #8 for water quality facilities. Per Table 4-2 below, the Project is adding 5,230 sf of New Impervious surface but only 890 sf of total PGIS (the 4,340 sf of proposed trail is considered new impervious surface, but it is not a pollution generating impervious surface) and 2,650 sf of PGPS, which is less than 5,000 sf of new plus replaced PGIS and less than ¾ acre of new PGPS that will be added. Therefore, the project is exempt from Core Requirement #8 and no water quality treatment is required for TDA 1. MAY CREEK TRAIL SOUTH WSP60% Design Phase Drainage Report WSP.com City of Renton – PARKS PLANNING AND DEVELOPMENT Page 10 Table 4-2 Comparison of New Versus Existing Surface Areas Project Limits Area (sf) Total Existing Impervious Surface Area 5,606 Total Replaced and New Impervious Surface Area 10,836 New Impervious Surface Area (South Trail – not pollution generating)4,340 Replaced Impervious Surface Area 0 New PGIS (frontage road)890 New PGPS 2,650 4.3 ON-SITE BMPS TDA 1 is required to follow the redevelopment project On-Site BMP requirements. The target surfaces within TDA 1 are summarized in Table 4-3. TDA 1 does not qualify for the basic exemption as the new plus replaced impervious surface is greater than 2,000 sf. However, projects qualifying as exempt from the flow control facility requirements do not have to achieve the LID Performance Standard, nor consider bioretention, permeable pavement, and full dispersion. The target impervious surfaces must still implement Basic Dispersion if feasible. Table 4-3 BMP Target Surfaces Target Surface Type Area (sf) New Impervious Surface not fully dispersed 5,230 New Pervious Surface not fully dispersed 2,650 Replaced Impervious Surface 0 Total 7,880 Table 4-4Table 4-3 summarizes the evaluation of the different BMPs for feasibility and applicability. Table 4-4 On-Site BMPs Step BMP Site Considerations 1 Full Dispersion Not required or feasible.Insufficient space on site to provide clearance from steep slope hazard area and sufficient length of a native vegetated flowpath. 2 Full Infiltration Not required or feasible. A geotechnical report completed for the project found high groundwater. Limited Infiltration Not required or feasible. A geotechnical report completed for the project found high groundwater. Bioretention Not required or feasible.Providing a roadside bioretention would require placement within a steep slope hazard area. Permeable Pavement Not required or feasible. A geotechnical report completed for the project found high groundwater. 3 Basic Dispersion Not feasible. Insufficient space on site to provide clearance from steep slope hazard area and sufficient length of a native vegetated flowpath. Based on the assessment above no BMPS are considered feasible and no specific BMPs are required. However, we are still implementing rock pads as a dispersion device to discharge concentrated runoff up-slope of the proposed trail. The runoff from the proposed trail impervious surface is designed to sheet flow into the wetlands and May Creek in order to avoid the concentration of runoff. Target pervious surfaces will still need to meet the City’s requirements for soil amendment BMP as detailed in Appendix C, Section C.2.13 of the 2022 RWSDM. MAY CREEK TRAIL SOUTH WSP60% Design Phase Drainage Report WSP.com City of Renton – PARKS PLANNING AND DEVELOPMENT Page 11 5 CONVEYANCE SYSTEM ANALYSIS AND DESIGN 5.1 LAKE WASHINGTON BLVD N Existing runoff within TDA 1 heading to the east side of the road is currently captured in a system of vegetated swales and culverts that discharges into May Creek on the northwest side of Lake Washington Blvd N. This existing system, upstream of the frontage road improvements, will not be impacted except for the replacement of a 12” culvert under the proposed trail. One new inlet will be added within Lake Washington Blvd N to capture flow that previously sheet flowed off the edge of the road but will now be channelized in the new gutter. It will be located at the downstream (northern) end of the new curb and gutter to capture the flow from the added impervious areas of the frontage road improvements and will discharge via a 12” RCP storm drain into Wetland A and eventually May Creek. Pipes and inlets have been designed in accordance with 2022 RSWDM requirements and hydraulic calculations have been included in Appendix C. RCP pipe is proposed due to low cover conditions. 5.2 MAY CREEK SOUTH TRAIL A new ditch and cross culvert system has been proposed to intercept upslope runoff prior to reaching the new trail. The ditches will be a vegetated 12-inch-deep V-ditch with 3:1 slopes. The flow from the ditches will discharge either directly onto a rock pad or will be routed under the trail in culverts and dispersed on the downslope side of the trail. The ditch and culverts have been designed in accordance with 2022 RSWDM requirements and hydraulic calculations have been included in Appendix C. MAY CREEK TRAIL SOUTH WSP60% Design Phase Drainage Report WSP.com City of Renton – PARKS PLANNING AND DEVELOPMENT Page 12 6 SPECIAL REPORTS AND STUDIES No special reports or studies have been conducted at this time. No site characteristics have been identified that require the preparation of special reports or studies. MAY CREEK TRAIL SOUTH WSP60% Design Phase Drainage Report WSP.com City of Renton – PARKS PLANNING AND DEVELOPMENT Page 13 7 OTHER PERMITS Other Permits that may be required for the Project include the following: -Section 404 Clean Water Act/Section 10 River and Harbors Act -Nationwide Permit 42 for Recreational Facilities; -Clean Water Act Section 401 Water Quality Certification; Hydraulic Project Approval; -Endangered Species Act – Programmatic Consultation; -State Environmental Protection Act; -Shoreline Substantial Development Permit; -Critical Areas Permit; -Shoreline Conditional Use Permit. MAY CREEK TRAIL SOUTH WSP60% Design Phase Drainage Report WSP.com City of Renton – PARKS PLANNING AND DEVELOPMENT Page 14 8 CONSTRUCTION STORMWATER POLLUTION PREVENTION PLAN ANALYSIS AND DESIGN A construction stormwater pollution prevention plan will be included in the next submittal. MAY CREEK TRAIL SOUTH WSP60% Design Phase Drainage Report WSP.com City of Renton – PARKS PLANNING AND DEVELOPMENT Page 15 9 BOND QUANTITIES, FACILITY SUMMARIES, AND DECLARATION OF COVENANT A bond quantities worksheet and declarations of covenant are not required for this project because City of Renton is a public entity. Flow control and water quality summary sheets and sketches for this project will be submitted in the next submittal. MAY CREEK TRAIL SOUTH WSP60% Design Phase Drainage Report WSP.com City of Renton – PARKS PLANNING AND DEVELOPMENT Page 16 10 OPERATIONS AND MAINTENANCE MANUAL No operations and maintenance manuals will be required for the Project. MAY CREEK TRAIL SOUTH WSP60% Design Phase Drainage Report WSP.com City of Renton – PARKS PLANNING AND DEVELOPMENT Page 17 11 REFERENCES City of Renton Public Works Department Surface Water Utility (City of Renton).2022.2022 City of Renton Surface Water Design Manual June 22, 2022 Sippo, Michael. 2024. Personal Communication. Email contact between WSP and Michael Sippo, Civil Engineer III. City of Renton. March 25, 2024. Federal Emergency Management Agency Flood Insurance Rate Map Attached in Appendix A City of Renton Online GIS https://maps.rentonwa.gov/Html5viewer/Index.html?viewer=cormaps U.S. Department of Agriculture, Natural Resources Conservation Service Web Soil Survey https://websoilsurvey.nrcs.usda.gov/app/ U.S. Fish and Wildlife Service Wetlands Mapper https://www.fws.gov/program/national-wetlands- inventory/wetlands-mapper Washington Department of Ecology Water Quality Atlas https://apps.ecology.wa.gov/waterqualityatlas/wqa/map APPENDICES APPENDIX A FIRM PANEL APPENDIX B EXHIBITS APPENDIX B-1SURFACE TYPE EXHIBIT SURFACE TYPE EXHIBIT MAY CREEK TRAIL SOUTH TRAIL DESIGN LA K E W A S H I N G T O N B L V D RENTON CITY OF La s t S a v e d b y : US C C 7 4 2 2 5 5 o n : Se p 3 0 , 2 0 2 4 6 : 2 3 P M F i l e : C:\ U s e r s \ U S C C 7 4 2 2 5 5 \ W S P O 3 6 5 \ N W M a r i t i m e P r o j e c t s - 3 0 9 0 2 2 1 1 \ 0 0 0 \ C A D D \ D w g s \ E x h i b i t s \ D r a i n a g e E x h i b i t _ P G I S . d w g Co p y r i g h t © W S P U S A I n c . A l l R i g h t s R e s e r v e d . WSP USA Inc. Suite 300 Federal Way, WA 98003-2600 TEL: (206) 431-2300 FAX: (206) 431-2250 33301 9th Avenue South 1" = 30'scale feet 6030030 LEGEND NEW IMPERVIOUS SURFACE (NOT POLLUTION GENERATING)- 4,340 SF NEW PERVIOUS SURFACE - 2,650 SF NEW POLLUTION GENERATING IMPERVIOUS SURFACE - 890 SF 1" = 30'scale feet 6030030 N 41ST ST PROPERTY LINE ROW APPENDIX B-2 HYDROLOGY EXHIBITS SD SD SD SD SD SD SD DRAINAGE AREA EXHIBIT - PROPOSED SITE MAY CREEK TRAIL SOUTH TRAIL DESIGN LEGEND DRAINAGE BOUNDARY PROPOSED CULVERT PROPOSED V-DTICH SD RENTON CITY OF La s t S a v e d b y : US C C 7 4 2 2 5 5 o n : Se p 3 0 , 2 0 2 4 7 : 1 4 P M F i l e : C:\ U s e r s \ U S C C 7 4 2 2 5 5 \ W S P O 3 6 5 \ N W M a r i t i m e P r o j e c t s - 3 0 9 0 2 2 1 1 \ 0 0 0 \ C A D D \ D w g s \ E x h i b i t s \ H y d r o l o g y _ E x h i b i t . d w g Co p y r i g h t © W S P U S A I n c . A l l R i g h t s R e s e r v e d . WSP USA Inc. Suite 300 Federal Way, WA 98003-2600 TEL: (206) 431-2300 FAX: (206) 431-2250 33301 9th Avenue South 1" = 30'scale feet 6030030 PROPOSED DRAINAGE AREA 1A = 0.29 ACRES PROPOSED DRAINAGE AREA 5 = 0.15 ACRES PROPOSED DRAINAGE AREA 8 = 4.46 ACRES PROPOSED DRAINAGE AREA 6 = 0.09 ACRES V-DITCH 1 V-DITCH 2 V-DITCH 3 V-DITCH 4 CULVERT 6 CULVERT 7 > CULVERT 5 CULVERT 2 CULVERT 1 PROPOSED DRAINAGE AREA 4 = 0.09 ACRES PROPOSED DRAINAGE AREA 2 = 0.55 ACRES PROPOSED DRAINAGE AREA 3 = 0.61 ACRES POC 1 CULVERT 3 CULVERT 4 PROPOSED DRAINAGE AREA 7 = 0.28 ACRES CATCH BASIN 1 PROPOSED DRAINAGE AREA 1B = 0.05 ACRES PROPOSED DRAINAGE AREA 1C = 0.09 ACRES APPENDIX C HYDRAULICS APPENDIX C-1 WWHM RESULTS DA 1 DA 2 DA 3 DA 4 DA 5 DA 6 DA 7 DA 8 A/B, Forest, Mod 0.38 0.48 0.61 0.09 0.15 0.09 0.28 4.46 A/B, Pasture, Mod Roads/Flat 0.13 Roads/Mod 0.51 0.48 0.61 0.09 0.15 0.09 0.28 4.46 A/B, Forest, Mod 0.29 0.55 0.61 0.09 0.15 0.09 0.28 4.36 A/B, Pasture, Mod Roads/Flat 0.14 0.10 Roads/Mod 0.43 0.55 0.61 0.09 0.15 0.09 0.28 4.46 The Threshold Discharge Area (POC 1) is downstream of the site at May Creek and includes DA 1 through DA 8 POC 1 Predeveloped Developed Q2 (cfs)0.05 0.09 Q5 (cfs)0.07 0.12 Q10 (cfs)0.08 0.14 Q25 (cfs)0.09 0.16 Q50 (cfs)0.11 0.18 Q100 (cfs)0.12 0.20 De v e l o p e d Pervious Impervious Total INPUTS Pr e d e v e l o p e d Pervious Impervious Total WWHM SUMMARY TABLES MODEL 1: COMPARING EXISTING AND PROPOSED SITE CONDITIONS FOR FLOW CONTROL REQUIREMENTS FLOW RESULTS WWHM Model 1 compares existing and proposed on-site conditions in order to show that the project does not trigger flow control requirements. The sum of the developed 100-year peak flows is 0.08 cfs greater than the sum of the existing site conditions 100-year peak flow. Therefore, this project is not subject to flow control requirements. Offsite 1 Offsite 2 DA 1A DA 1B DA 3 DA 7 A/B, Forest, Mod 0.20 0.01 0.61 0.28 A/B, Pasture, Mod 0.30 1.87 Roads/Flat 1.04 0.09 0.04 Roads/Mod 0.15 0.46 2.91 0.29 0.05 0.61 0.28 A/B, Forest, Mod 0.20 0.61 0.28 A/B, Pasture, Mod 0.30 1.87 Roads/Flat 1.04 0.09 0.05 Roads/Mod 0.15 0.46 2.91 0.29 0.05 0.61 0.28 Offsite 1 92' x 65" x 40 " Eliptical Holding Tank Tank 1 Diameter (ft)4.25 Length (ft)92 Riser Height (ft)4.5 Riser Diameter (in)12 Orifice Diameter (in)12 Orifice Height (ft)0 DEVELOPED Offsite 1&2 and DA 1A (POC 1)DA 1B (POC 2)DA 3 (POC 3) DA 7 (POC 4) Q2 (cfs)0.49 0.02 0.01 0.01 Q5 (cfs)0.63 0.02 0.01 0.01 Q10 (cfs)0.72 0.03 0.01 0.01 Q25 (cfs)0.83 0.03 0.01 0.01 Q50 (cfs)0.92 0.04 0.01 0.01 Q100 (cfs)1.01 0.04 0.01 0.01 RESULTS WWHM Model 2 analyzes the above areas for the pipe sizing analysis included in Appendix C2. Offsite area 1, Offsite area 2, and DA 1A are routed into Culvert 1. DA 1B is routed into Culvert 2. DA 3 is routed into Culvert 4. DA 7 is routed into Culvert 7. Flow rates for DA 2, 4, 5, and 6 are calculated via the rational method and are included in the pipe sizing analysis in Appendix C2. Offsite DA 1 is routed through an existing Eliptical Holding Tank with the specifications listed above. Please refer to Appendix F for the as-built plan R-159801. De v e l o p e d Pervious Impervious Total *Must include predeveloped area to accommodate WHHM modeling input requirements. Utilizing Developed conditions for pipe sizing analysis. MODEL 2: PROPOSED SITE AND OFFSITE CONDITIONS FOR PIPE SIZING ANALYSIS INPUTS Pr e d e v e l o p e d * Pervious Impervious Total WWHM2012 PROJECT REPORT MayCreekTrail_Model1 9/26/2024 11:15:00 AM Page 2 General Model Information WWHM2012 Project Name:MayCreekTrail_Model1 Site Name:May Creek Trail South Site Address: City: Report Date:9/26/2024 Gage:Seatac Data Start:1948/10/01 Data End:2009/09/30 Timestep:15 Minute Precip Scale:1.000 Version Date:2023/01/27 Version:4.2.19 POC Thresholds Low Flow Threshold for POC1:50 Percent of the 2 Year High Flow Threshold for POC1:50 Year MayCreekTrail_Model1 9/26/2024 11:15:00 AM Page 3 Landuse Basin Data Predeveloped Land Use DA 1 Bypass:No GroundWater:No Pervious Land Use acre A B, Forest, Mod 0.38 Pervious Total 0.38 Impervious Land Use acre ROADS FLAT 0.13 Impervious Total 0.13 Basin Total 0.51 MayCreekTrail_Model1 9/26/2024 11:15:00 AM Page 4 DA 2 Bypass:No GroundWater:No Pervious Land Use acre A B, Forest, Mod 0.48 Pervious Total 0.48 Impervious Land Use acre Impervious Total 0 Basin Total 0.48 MayCreekTrail_Model1 9/26/2024 11:15:00 AM Page 5 DA 3 Bypass:No GroundWater:No Pervious Land Use acre A B, Forest, Mod 0.61 Pervious Total 0.61 Impervious Land Use acre Impervious Total 0 Basin Total 0.61 MayCreekTrail_Model1 9/26/2024 11:15:00 AM Page 6 DA 4 Bypass:No GroundWater:No Pervious Land Use acre A B, Forest, Mod 0.09 Pervious Total 0.09 Impervious Land Use acre Impervious Total 0 Basin Total 0.09 MayCreekTrail_Model1 9/26/2024 11:15:00 AM Page 7 DA 5 Bypass:No GroundWater:No Pervious Land Use acre A B, Forest, Mod 0.15 Pervious Total 0.15 Impervious Land Use acre Impervious Total 0 Basin Total 0.15 MayCreekTrail_Model1 9/26/2024 11:15:00 AM Page 8 DA 6 Bypass:No GroundWater:No Pervious Land Use acre A B, Forest, Mod 0.09 Pervious Total 0.09 Impervious Land Use acre Impervious Total 0 Basin Total 0.09 MayCreekTrail_Model1 9/26/2024 11:15:00 AM Page 9 DA 7 Bypass:No GroundWater:No Pervious Land Use acre A B, Forest, Mod 0.28 Pervious Total 0.28 Impervious Land Use acre Impervious Total 0 Basin Total 0.28 MayCreekTrail_Model1 9/26/2024 11:15:00 AM Page 10 DA 8 Bypass:No GroundWater:No Pervious Land Use acre A B, Forest, Mod 4.46 Pervious Total 4.46 Impervious Land Use acre Impervious Total 0 Basin Total 4.46 MayCreekTrail_Model1 9/26/2024 11:15:00 AM Page 11 Mitigated Land Use DA 1 Bypass:No GroundWater:No Pervious Land Use acre A B, Forest, Mod 0.29 Pervious Total 0.29 Impervious Land Use acre ROADS FLAT 0.14 Impervious Total 0.14 Basin Total 0.43 MayCreekTrail_Model1 9/26/2024 11:15:00 AM Page 12 DA 2 Bypass:No GroundWater:No Pervious Land Use acre A B, Forest, Mod 0.55 Pervious Total 0.55 Impervious Land Use acre Impervious Total 0 Basin Total 0.55 MayCreekTrail_Model1 9/26/2024 11:15:00 AM Page 13 DA 3 Bypass:No GroundWater:No Pervious Land Use acre A B, Forest, Mod 0.61 Pervious Total 0.61 Impervious Land Use acre Impervious Total 0 Basin Total 0.61 MayCreekTrail_Model1 9/26/2024 11:15:00 AM Page 14 DA 4 Bypass:No GroundWater:No Pervious Land Use acre A B, Forest, Mod 0.09 Pervious Total 0.09 Impervious Land Use acre Impervious Total 0 Basin Total 0.09 MayCreekTrail_Model1 9/26/2024 11:15:00 AM Page 15 DA 5 Bypass:No GroundWater:No Pervious Land Use acre A B, Forest, Mod 0.15 Pervious Total 0.15 Impervious Land Use acre Impervious Total 0 Basin Total 0.15 MayCreekTrail_Model1 9/26/2024 11:15:00 AM Page 16 DA 6 Bypass:No GroundWater:No Pervious Land Use acre A B, Forest, Mod 0.09 Pervious Total 0.09 Impervious Land Use acre Impervious Total 0 Basin Total 0.09 MayCreekTrail_Model1 9/26/2024 11:15:00 AM Page 17 DA 7 Bypass:No GroundWater:No Pervious Land Use acre A B, Forest, Mod 0.28 Pervious Total 0.28 Impervious Land Use acre Impervious Total 0 Basin Total 0.28 MayCreekTrail_Model1 9/26/2024 11:15:00 AM Page 18 DA 8 Bypass:No GroundWater:No Pervious Land Use acre A B, Forest, Mod 4.36 Pervious Total 4.36 Impervious Land Use acre ROADS FLAT 0.1 Impervious Total 0.1 Basin Total 4.46 MayCreekTrail_Model1 9/26/2024 11:15:00 AM Page 21 Analysis Results POC 1 + Predeveloped x Mitigated Predeveloped Landuse Totals for POC #1 Total Pervious Area:6.54 Total Impervious Area:0.13 Mitigated Landuse Totals for POC #1 Total Pervious Area:6.42 Total Impervious Area:0.24 Flow Frequency Method:Log Pearson Type III 17B Flow Frequency Return Periods for Predeveloped. POC #1 Return Period Flow(cfs) 2 year 0.051762 5 year 0.067461 10 year 0.078841 25 year 0.09438 50 year 0.106825 100 year 0.120041 Flow Frequency Return Periods for Mitigated. POC #1 Return Period Flow(cfs) 2 year 0.09351 5 year 0.119506 10 year 0.137695 25 year 0.161842 50 year 0.180706 100 year 0.200345 Annual Peaks Annual Peaks for Predeveloped and Mitigated. POC #1 Year Predeveloped Mitigated 1949 0.064 0.119 1950 0.071 0.130 1951 0.044 0.078 1952 0.036 0.066 1953 0.039 0.072 1954 0.040 0.074 1955 0.050 0.088 1956 0.049 0.087 1957 0.051 0.094 1958 0.041 0.076 MayCreekTrail_Model1 9/26/2024 11:15:22 AM Page 22 1959 0.042 0.078 1960 0.043 0.077 1961 0.047 0.083 1962 0.040 0.072 1963 0.044 0.079 1964 0.042 0.077 1965 0.053 0.097 1966 0.036 0.065 1967 0.065 0.116 1968 0.069 0.127 1969 0.053 0.093 1970 0.046 0.085 1971 0.055 0.102 1972 0.074 0.105 1973 0.037 0.066 1974 0.050 0.093 1975 0.058 0.107 1976 0.039 0.072 1977 0.043 0.078 1978 0.053 0.097 1979 0.072 0.132 1980 0.066 0.119 1981 0.057 0.101 1982 0.073 0.135 1983 0.062 0.113 1984 0.042 0.074 1985 0.054 0.098 1986 0.047 0.085 1987 0.070 0.128 1988 0.042 0.077 1989 0.052 0.097 1990 0.089 0.163 1991 0.071 0.130 1992 0.042 0.073 1993 0.035 0.062 1994 0.035 0.065 1995 0.050 0.089 1996 0.094 0.130 1997 0.048 0.088 1998 0.051 0.091 1999 0.098 0.182 2000 0.049 0.090 2001 0.055 0.100 2002 0.067 0.120 2003 0.049 0.090 2004 0.092 0.170 2005 0.045 0.081 2006 0.038 0.069 2007 0.154 0.219 2008 0.069 0.128 2009 0.064 0.118 Ranked Annual Peaks Ranked Annual Peaks for Predeveloped and Mitigated. POC #1 Rank Predeveloped Mitigated 1 0.1539 0.2185 2 0.0985 0.1817 3 0.0944 0.1701 MayCreekTrail_Model1 9/26/2024 11:15:22 AM Page 23 4 0.0922 0.1633 5 0.0886 0.1349 6 0.0738 0.1317 7 0.0731 0.1305 8 0.0720 0.1302 9 0.0709 0.1295 10 0.0708 0.1284 11 0.0700 0.1281 12 0.0694 0.1271 13 0.0689 0.1197 14 0.0667 0.1195 15 0.0660 0.1188 16 0.0651 0.1184 17 0.0645 0.1162 18 0.0642 0.1125 19 0.0623 0.1070 20 0.0580 0.1050 21 0.0569 0.1017 22 0.0551 0.1006 23 0.0549 0.1004 24 0.0545 0.0981 25 0.0535 0.0971 26 0.0528 0.0970 27 0.0526 0.0968 28 0.0525 0.0942 29 0.0510 0.0932 30 0.0506 0.0928 31 0.0505 0.0913 32 0.0503 0.0905 33 0.0499 0.0905 34 0.0492 0.0892 35 0.0490 0.0885 36 0.0489 0.0877 37 0.0475 0.0869 38 0.0472 0.0853 39 0.0465 0.0850 40 0.0462 0.0833 41 0.0453 0.0809 42 0.0444 0.0788 43 0.0443 0.0784 44 0.0433 0.0782 45 0.0427 0.0778 46 0.0423 0.0775 47 0.0421 0.0775 48 0.0420 0.0769 49 0.0419 0.0760 50 0.0418 0.0745 51 0.0412 0.0737 52 0.0404 0.0731 53 0.0403 0.0724 54 0.0391 0.0719 55 0.0390 0.0717 56 0.0384 0.0687 57 0.0366 0.0664 58 0.0362 0.0657 59 0.0356 0.0649 60 0.0350 0.0646 61 0.0346 0.0617 MayCreekTrail_Model1 9/26/2024 11:15:22 AM Page 24 MayCreekTrail_Model1 9/26/2024 11:15:22 AM Page 25 Duration Flows The Duration Matching Failed Flow(cfs)Predev Mit Percentage Pass/Fail 0.0259 1824 10466 573 Fail 0.0267 1627 9702 596 Fail 0.0275 1459 9045 619 Fail 0.0283 1294 8393 648 Fail 0.0292 1170 7753 662 Fail 0.0300 1061 7187 677 Fail 0.0308 966 6678 691 Fail 0.0316 868 6209 715 Fail 0.0324 785 5824 741 Fail 0.0332 715 5394 754 Fail 0.0341 653 5029 770 Fail 0.0349 601 4678 778 Fail 0.0357 544 4361 801 Fail 0.0365 500 4060 812 Fail 0.0373 455 3799 834 Fail 0.0381 419 3591 857 Fail 0.0390 382 3367 881 Fail 0.0398 352 3166 899 Fail 0.0406 324 2952 911 Fail 0.0414 300 2755 918 Fail 0.0422 272 2588 951 Fail 0.0431 251 2423 965 Fail 0.0439 237 2289 965 Fail 0.0447 220 2154 979 Fail 0.0455 206 2024 982 Fail 0.0463 177 1892 1068 Fail 0.0471 167 1777 1064 Fail 0.0480 162 1653 1020 Fail 0.0488 147 1556 1058 Fail 0.0496 135 1458 1080 Fail 0.0504 126 1377 1092 Fail 0.0512 116 1296 1117 Fail 0.0520 111 1204 1084 Fail 0.0529 101 1136 1124 Fail 0.0537 95 1088 1145 Fail 0.0545 85 1028 1209 Fail 0.0553 78 963 1234 Fail 0.0561 75 918 1224 Fail 0.0570 70 867 1238 Fail 0.0578 67 822 1226 Fail 0.0586 61 785 1286 Fail 0.0594 60 742 1236 Fail 0.0602 58 706 1217 Fail 0.0610 56 668 1192 Fail 0.0619 54 632 1170 Fail 0.0627 49 596 1216 Fail 0.0635 45 576 1280 Fail 0.0643 40 546 1365 Fail 0.0651 38 521 1371 Fail 0.0659 35 496 1417 Fail 0.0668 31 469 1512 Fail 0.0676 27 449 1662 Fail 0.0684 26 422 1623 Fail 0.0692 23 407 1769 Fail MayCreekTrail_Model1 9/26/2024 11:15:22 AM Page 26 0.0700 20 388 1940 Fail 0.0708 18 376 2088 Fail 0.0717 16 353 2206 Fail 0.0725 15 334 2226 Fail 0.0733 14 323 2307 Fail 0.0741 13 314 2415 Fail 0.0749 13 293 2253 Fail 0.0758 13 285 2192 Fail 0.0766 12 273 2275 Fail 0.0774 12 259 2158 Fail 0.0782 12 246 2050 Fail 0.0790 11 233 2118 Fail 0.0798 11 226 2054 Fail 0.0807 11 223 2027 Fail 0.0815 10 208 2080 Fail 0.0823 9 202 2244 Fail 0.0831 9 192 2133 Fail 0.0839 9 187 2077 Fail 0.0847 9 177 1966 Fail 0.0856 9 166 1844 Fail 0.0864 8 160 2000 Fail 0.0872 8 156 1950 Fail 0.0880 8 153 1912 Fail 0.0888 7 142 2028 Fail 0.0897 7 135 1928 Fail 0.0905 7 131 1871 Fail 0.0913 6 124 2066 Fail 0.0921 6 121 2016 Fail 0.0929 4 118 2950 Fail 0.0937 4 115 2875 Fail 0.0946 3 109 3633 Fail 0.0954 3 107 3566 Fail 0.0962 3 104 3466 Fail 0.0970 3 100 3333 Fail 0.0978 3 94 3133 Fail 0.0986 2 91 4550 Fail 0.0995 2 84 4200 Fail 0.1003 2 80 4000 Fail 0.1011 2 77 3850 Fail 0.1019 2 73 3650 Fail 0.1027 2 72 3600 Fail 0.1036 2 70 3500 Fail 0.1044 2 69 3450 Fail 0.1052 2 65 3250 Fail 0.1060 2 62 3100 Fail 0.1068 2 60 3000 Fail The development has an increase in flow durations from 1/2 Predeveloped 2 year flow to the 2 year flow or more than a 10% increase from the 2 year to the 50 year flow. The development has an increase in flow durations for more than 50% of the flows for the range of the duration analysis. MayCreekTrail_Model1 9/26/2024 11:15:22 AM Page 27 Water Quality Water Quality BMP Flow and Volume for POC #1 On-line facility volume:0 acre-feet On-line facility target flow:0 cfs. Adjusted for 15 min:0 cfs. Off-line facility target flow:0 cfs. Adjusted for 15 min:0 cfs. MayCreekTrail_Model1 9/26/2024 11:15:22 AM Page 28 LID Report MayCreekTrail_Model1 9/26/2024 11:15:29 AM Page 29 Model Default Modifications Total of 0 changes have been made. PERLND Changes No PERLND changes have been made. IMPLND Changes No IMPLND changes have been made. MayCreekTrail_Model1 9/26/2024 11:15:29 AM Page 30 Appendix Predeveloped Schematic MayCreekTrail_Model1 9/26/2024 11:15:29 AM Page 31 Mitigated Schematic MayCreekTrail_Model1 9/26/2024 11:15:29 AM Page 32 Predeveloped UCI File RUN GLOBAL WWHM4 model simulation START 1948 10 01 END 2009 09 30 RUN INTERP OUTPUT LEVEL 3 0 RESUME 0 RUN 1 UNIT SYSTEM 1 END GLOBAL FILES <File> <Un#> <-----------File Name------------------------------>*** <-ID-> *** WDM 26 MayCreekTrail_Model1.wdm MESSU 25 PreMayCreekTrail_Model1.MES 27 PreMayCreekTrail_Model1.L61 28 PreMayCreekTrail_Model1.L62 30 POCMayCreekTrail_Model11.dat END FILES OPN SEQUENCE INGRP INDELT 00:15 PERLND 2 IMPLND 1 COPY 501 DISPLY 1 END INGRP END OPN SEQUENCE DISPLY DISPLY-INFO1 # - #<----------Title----------->***TRAN PIVL DIG1 FIL1 PYR DIG2 FIL2 YRND 1 DA 1 MAX 1 2 30 9 END DISPLY-INFO1 END DISPLY COPY TIMESERIES # - # NPT NMN *** 1 1 1 501 1 1 END TIMESERIES END COPY GENER OPCODE # # OPCD *** END OPCODE PARM # # K *** END PARM END GENER PERLND GEN-INFO <PLS ><-------Name------->NBLKS Unit-systems Printer *** # - # User t-series Engl Metr *** in out *** 2 A/B, Forest, Mod 1 1 1 1 27 0 END GEN-INFO *** Section PWATER*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # ATMP SNOW PWAT SED PST PWG PQAL MSTL PEST NITR PHOS TRAC *** 2 0 0 1 0 0 0 0 0 0 0 0 0 END ACTIVITY PRINT-INFO <PLS > ***************** Print-flags ***************************** PIVL PYR # - # ATMP SNOW PWAT SED PST PWG PQAL MSTL PEST NITR PHOS TRAC ********* 2 0 0 4 0 0 0 0 0 0 0 0 0 1 9 END PRINT-INFO MayCreekTrail_Model1 9/26/2024 11:15:29 AM Page 33 PWAT-PARM1 <PLS > PWATER variable monthly parameter value flags *** # - # CSNO RTOP UZFG VCS VUZ VNN VIFW VIRC VLE INFC HWT *** 2 0 0 0 0 0 0 0 0 0 0 0 END PWAT-PARM1 PWAT-PARM2 <PLS > PWATER input info: Part 2 *** # - # ***FOREST LZSN INFILT LSUR SLSUR KVARY AGWRC 2 0 5 2 400 0.1 0.3 0.996 END PWAT-PARM2 PWAT-PARM3 <PLS > PWATER input info: Part 3 *** # - # ***PETMAX PETMIN INFEXP INFILD DEEPFR BASETP AGWETP 2 0 0 2 2 0 0 0 END PWAT-PARM3 PWAT-PARM4 <PLS > PWATER input info: Part 4 *** # - # CEPSC UZSN NSUR INTFW IRC LZETP *** 2 0.2 0.5 0.35 0 0.7 0.7 END PWAT-PARM4 PWAT-STATE1 <PLS > *** Initial conditions at start of simulation ran from 1990 to end of 1992 (pat 1-11-95) RUN 21 *** # - # *** CEPS SURS UZS IFWS LZS AGWS GWVS 2 0 0 0 0 3 1 0 END PWAT-STATE1 END PERLND IMPLND GEN-INFO <PLS ><-------Name-------> Unit-systems Printer *** # - # User t-series Engl Metr *** in out *** 1 ROADS/FLAT 1 1 1 27 0 END GEN-INFO *** Section IWATER*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # ATMP SNOW IWAT SLD IWG IQAL *** 1 0 0 1 0 0 0 END ACTIVITY PRINT-INFO <ILS > ******** Print-flags ******** PIVL PYR # - # ATMP SNOW IWAT SLD IWG IQAL ********* 1 0 0 4 0 0 4 1 9 END PRINT-INFO IWAT-PARM1 <PLS > IWATER variable monthly parameter value flags *** # - # CSNO RTOP VRS VNN RTLI *** 1 0 0 0 0 0 END IWAT-PARM1 IWAT-PARM2 <PLS > IWATER input info: Part 2 *** # - # *** LSUR SLSUR NSUR RETSC 1 400 0.01 0.1 0.1 END IWAT-PARM2 IWAT-PARM3 <PLS > IWATER input info: Part 3 *** # - # ***PETMAX PETMIN 1 0 0 MayCreekTrail_Model1 9/26/2024 11:15:29 AM Page 34 END IWAT-PARM3 IWAT-STATE1 <PLS > *** Initial conditions at start of simulation # - # *** RETS SURS 1 0 0 END IWAT-STATE1 END IMPLND SCHEMATIC <-Source-> <--Area--> <-Target-> MBLK *** <Name> # <-factor-> <Name> # Tbl# *** DA 1*** PERLND 2 0.38 COPY 501 12 PERLND 2 0.38 COPY 501 13 IMPLND 1 0.13 COPY 501 15 DA 2*** PERLND 2 0.48 COPY 501 12 PERLND 2 0.48 COPY 501 13 DA 3*** PERLND 2 0.61 COPY 501 12 PERLND 2 0.61 COPY 501 13 DA 4*** PERLND 2 0.09 COPY 501 12 PERLND 2 0.09 COPY 501 13 DA 5*** PERLND 2 0.15 COPY 501 12 PERLND 2 0.15 COPY 501 13 DA 6*** PERLND 2 0.09 COPY 501 12 PERLND 2 0.09 COPY 501 13 DA 7*** PERLND 2 0.28 COPY 501 12 PERLND 2 0.28 COPY 501 13 DA 8*** PERLND 2 4.46 COPY 501 12 PERLND 2 4.46 COPY 501 13 ******Routing****** END SCHEMATIC NETWORK <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> # <Name> # #<-factor->strg <Name> # # <Name> # # *** COPY 501 OUTPUT MEAN 1 1 48.4 DISPLY 1 INPUT TIMSER 1 <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> # <Name> # #<-factor->strg <Name> # # <Name> # # *** END NETWORK RCHRES GEN-INFO RCHRES Name Nexits Unit Systems Printer *** # - #<------------------><---> User T-series Engl Metr LKFG *** in out *** END GEN-INFO *** Section RCHRES*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # HYFG ADFG CNFG HTFG SDFG GQFG OXFG NUFG PKFG PHFG *** END ACTIVITY PRINT-INFO <PLS > ***************** Print-flags ******************* PIVL PYR # - # HYDR ADCA CONS HEAT SED GQL OXRX NUTR PLNK PHCB PIVL PYR ********* END PRINT-INFO MayCreekTrail_Model1 9/26/2024 11:15:29 AM Page 35 HYDR-PARM1 RCHRES Flags for each HYDR Section *** # - # VC A1 A2 A3 ODFVFG for each *** ODGTFG for each FUNCT for each FG FG FG FG possible exit *** possible exit possible exit * * * * * * * * * * * * * * *** END HYDR-PARM1 HYDR-PARM2 # - # FTABNO LEN DELTH STCOR KS DB50 *** <------><--------><--------><--------><--------><--------><--------> *** END HYDR-PARM2 HYDR-INIT RCHRES Initial conditions for each HYDR section *** # - # *** VOL Initial value of COLIND Initial value of OUTDGT *** ac-ft for each possible exit for each possible exit <------><--------> <---><---><---><---><---> *** <---><---><---><---><---> END HYDR-INIT END RCHRES SPEC-ACTIONS END SPEC-ACTIONS FTABLES END FTABLES EXT SOURCES <-Volume-> <Member> SsysSgap<--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> # <Name> # tem strg<-factor->strg <Name> # # <Name> # # *** WDM 2 PREC ENGL 1 PERLND 1 999 EXTNL PREC WDM 2 PREC ENGL 1 IMPLND 1 999 EXTNL PREC WDM 1 EVAP ENGL 0.76 PERLND 1 999 EXTNL PETINP WDM 1 EVAP ENGL 0.76 IMPLND 1 999 EXTNL PETINP END EXT SOURCES EXT TARGETS <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Volume-> <Member> Tsys Tgap Amd *** <Name> # <Name> # #<-factor->strg <Name> # <Name> tem strg strg*** COPY 501 OUTPUT MEAN 1 1 48.4 WDM 501 FLOW ENGL REPL END EXT TARGETS MASS-LINK <Volume> <-Grp> <-Member-><--Mult--> <Target> <-Grp> <-Member->*** <Name> <Name> # #<-factor-> <Name> <Name> # #*** MASS-LINK 12 PERLND PWATER SURO 0.083333 COPY INPUT MEAN END MASS-LINK 12 MASS-LINK 13 PERLND PWATER IFWO 0.083333 COPY INPUT MEAN END MASS-LINK 13 MASS-LINK 15 IMPLND IWATER SURO 0.083333 COPY INPUT MEAN END MASS-LINK 15 END MASS-LINK END RUN MayCreekTrail_Model1 9/26/2024 11:15:29 AM Page 36 Mitigated UCI File RUN GLOBAL WWHM4 model simulation START 1948 10 01 END 2009 09 30 RUN INTERP OUTPUT LEVEL 3 0 RESUME 0 RUN 1 UNIT SYSTEM 1 END GLOBAL FILES <File> <Un#> <-----------File Name------------------------------>*** <-ID-> *** WDM 26 MayCreekTrail_Model1.wdm MESSU 25 MitMayCreekTrail_Model1.MES 27 MitMayCreekTrail_Model1.L61 28 MitMayCreekTrail_Model1.L62 30 POCMayCreekTrail_Model11.dat END FILES OPN SEQUENCE INGRP INDELT 00:15 PERLND 2 IMPLND 1 COPY 501 DISPLY 1 END INGRP END OPN SEQUENCE DISPLY DISPLY-INFO1 # - #<----------Title----------->***TRAN PIVL DIG1 FIL1 PYR DIG2 FIL2 YRND 1 DA 1 MAX 1 2 30 9 END DISPLY-INFO1 END DISPLY COPY TIMESERIES # - # NPT NMN *** 1 1 1 501 1 1 END TIMESERIES END COPY GENER OPCODE # # OPCD *** END OPCODE PARM # # K *** END PARM END GENER PERLND GEN-INFO <PLS ><-------Name------->NBLKS Unit-systems Printer *** # - # User t-series Engl Metr *** in out *** 2 A/B, Forest, Mod 1 1 1 1 27 0 END GEN-INFO *** Section PWATER*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # ATMP SNOW PWAT SED PST PWG PQAL MSTL PEST NITR PHOS TRAC *** 2 0 0 1 0 0 0 0 0 0 0 0 0 END ACTIVITY PRINT-INFO <PLS > ***************** Print-flags ***************************** PIVL PYR # - # ATMP SNOW PWAT SED PST PWG PQAL MSTL PEST NITR PHOS TRAC ********* 2 0 0 4 0 0 0 0 0 0 0 0 0 1 9 END PRINT-INFO MayCreekTrail_Model1 9/26/2024 11:15:29 AM Page 37 PWAT-PARM1 <PLS > PWATER variable monthly parameter value flags *** # - # CSNO RTOP UZFG VCS VUZ VNN VIFW VIRC VLE INFC HWT *** 2 0 0 0 0 0 0 0 0 0 0 0 END PWAT-PARM1 PWAT-PARM2 <PLS > PWATER input info: Part 2 *** # - # ***FOREST LZSN INFILT LSUR SLSUR KVARY AGWRC 2 0 5 2 400 0.1 0.3 0.996 END PWAT-PARM2 PWAT-PARM3 <PLS > PWATER input info: Part 3 *** # - # ***PETMAX PETMIN INFEXP INFILD DEEPFR BASETP AGWETP 2 0 0 2 2 0 0 0 END PWAT-PARM3 PWAT-PARM4 <PLS > PWATER input info: Part 4 *** # - # CEPSC UZSN NSUR INTFW IRC LZETP *** 2 0.2 0.5 0.35 0 0.7 0.7 END PWAT-PARM4 PWAT-STATE1 <PLS > *** Initial conditions at start of simulation ran from 1990 to end of 1992 (pat 1-11-95) RUN 21 *** # - # *** CEPS SURS UZS IFWS LZS AGWS GWVS 2 0 0 0 0 3 1 0 END PWAT-STATE1 END PERLND IMPLND GEN-INFO <PLS ><-------Name-------> Unit-systems Printer *** # - # User t-series Engl Metr *** in out *** 1 ROADS/FLAT 1 1 1 27 0 END GEN-INFO *** Section IWATER*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # ATMP SNOW IWAT SLD IWG IQAL *** 1 0 0 1 0 0 0 END ACTIVITY PRINT-INFO <ILS > ******** Print-flags ******** PIVL PYR # - # ATMP SNOW IWAT SLD IWG IQAL ********* 1 0 0 4 0 0 4 1 9 END PRINT-INFO IWAT-PARM1 <PLS > IWATER variable monthly parameter value flags *** # - # CSNO RTOP VRS VNN RTLI *** 1 0 0 0 0 0 END IWAT-PARM1 IWAT-PARM2 <PLS > IWATER input info: Part 2 *** # - # *** LSUR SLSUR NSUR RETSC 1 400 0.01 0.1 0.1 END IWAT-PARM2 IWAT-PARM3 <PLS > IWATER input info: Part 3 *** # - # ***PETMAX PETMIN 1 0 0 MayCreekTrail_Model1 9/26/2024 11:15:29 AM Page 38 END IWAT-PARM3 IWAT-STATE1 <PLS > *** Initial conditions at start of simulation # - # *** RETS SURS 1 0 0 END IWAT-STATE1 END IMPLND SCHEMATIC <-Source-> <--Area--> <-Target-> MBLK *** <Name> # <-factor-> <Name> # Tbl# *** DA 1*** PERLND 2 0.29 COPY 501 12 PERLND 2 0.29 COPY 501 13 IMPLND 1 0.14 COPY 501 15 DA 2*** PERLND 2 0.55 COPY 501 12 PERLND 2 0.55 COPY 501 13 DA 3*** PERLND 2 0.61 COPY 501 12 PERLND 2 0.61 COPY 501 13 DA 4*** PERLND 2 0.09 COPY 501 12 PERLND 2 0.09 COPY 501 13 DA 5*** PERLND 2 0.15 COPY 501 12 PERLND 2 0.15 COPY 501 13 DA 6*** PERLND 2 0.09 COPY 501 12 PERLND 2 0.09 COPY 501 13 DA 7*** PERLND 2 0.28 COPY 501 12 PERLND 2 0.28 COPY 501 13 DA 8*** PERLND 2 4.36 COPY 501 12 PERLND 2 4.36 COPY 501 13 IMPLND 1 0.1 COPY 501 15 ******Routing****** END SCHEMATIC NETWORK <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> # <Name> # #<-factor->strg <Name> # # <Name> # # *** COPY 501 OUTPUT MEAN 1 1 48.4 DISPLY 1 INPUT TIMSER 1 <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> # <Name> # #<-factor->strg <Name> # # <Name> # # *** END NETWORK RCHRES GEN-INFO RCHRES Name Nexits Unit Systems Printer *** # - #<------------------><---> User T-series Engl Metr LKFG *** in out *** END GEN-INFO *** Section RCHRES*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # HYFG ADFG CNFG HTFG SDFG GQFG OXFG NUFG PKFG PHFG *** END ACTIVITY PRINT-INFO <PLS > ***************** Print-flags ******************* PIVL PYR # - # HYDR ADCA CONS HEAT SED GQL OXRX NUTR PLNK PHCB PIVL PYR ********* MayCreekTrail_Model1 9/26/2024 11:15:29 AM Page 39 END PRINT-INFO HYDR-PARM1 RCHRES Flags for each HYDR Section *** # - # VC A1 A2 A3 ODFVFG for each *** ODGTFG for each FUNCT for each FG FG FG FG possible exit *** possible exit possible exit * * * * * * * * * * * * * * *** END HYDR-PARM1 HYDR-PARM2 # - # FTABNO LEN DELTH STCOR KS DB50 *** <------><--------><--------><--------><--------><--------><--------> *** END HYDR-PARM2 HYDR-INIT RCHRES Initial conditions for each HYDR section *** # - # *** VOL Initial value of COLIND Initial value of OUTDGT *** ac-ft for each possible exit for each possible exit <------><--------> <---><---><---><---><---> *** <---><---><---><---><---> END HYDR-INIT END RCHRES SPEC-ACTIONS END SPEC-ACTIONS FTABLES END FTABLES EXT SOURCES <-Volume-> <Member> SsysSgap<--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> # <Name> # tem strg<-factor->strg <Name> # # <Name> # # *** WDM 2 PREC ENGL 1 PERLND 1 999 EXTNL PREC WDM 2 PREC ENGL 1 IMPLND 1 999 EXTNL PREC WDM 1 EVAP ENGL 0.76 PERLND 1 999 EXTNL PETINP WDM 1 EVAP ENGL 0.76 IMPLND 1 999 EXTNL PETINP END EXT SOURCES EXT TARGETS <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Volume-> <Member> Tsys Tgap Amd *** <Name> # <Name> # #<-factor->strg <Name> # <Name> tem strg strg*** COPY 1 OUTPUT MEAN 1 1 48.4 WDM 701 FLOW ENGL REPL COPY 501 OUTPUT MEAN 1 1 48.4 WDM 801 FLOW ENGL REPL END EXT TARGETS MASS-LINK <Volume> <-Grp> <-Member-><--Mult--> <Target> <-Grp> <-Member->*** <Name> <Name> # #<-factor-> <Name> <Name> # #*** MASS-LINK 12 PERLND PWATER SURO 0.083333 COPY INPUT MEAN END MASS-LINK 12 MASS-LINK 13 PERLND PWATER IFWO 0.083333 COPY INPUT MEAN END MASS-LINK 13 MASS-LINK 15 IMPLND IWATER SURO 0.083333 COPY INPUT MEAN END MASS-LINK 15 END MASS-LINK END RUN MayCreekTrail_Model1 9/26/2024 11:15:29 AM Page 42 Disclaimer Legal Notice This program and accompanying documentation are provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by End User. Clear Creek Solutions Inc. and the governmental licensee or sublicensees disclaim all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall Clear Creek Solutions Inc. be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the use of, or inability to use this program even if Clear Creek Solutions Inc. or their authorized representatives have been advised of the possibility of such damages. Software Copyright © by : Clear Creek Solutions, Inc. 2005-2024; All Rights Reserved. Clear Creek Solutions, Inc. 6200 Capitol Blvd. Ste F Olympia, WA. 98501 Toll Free 1(866)943-0304 Local (360)943-0304 www.clearcreeksolutions.com WWHM2012 PROJECT REPORT MayCreekTrail_Model2 9/26/2024 7:20:23 PM Page 2 General Model Information WWHM2012 Project Name:MayCreekTrail_Model2 Site Name:May Creek Trail South Site Address: City: Report Date:9/26/2024 Gage:Seatac Data Start:1948/10/01 Data End:2009/09/30 Timestep:15 Minute Precip Scale:1.000 Version Date:2023/01/27 Version:4.2.19 POC Thresholds Low Flow Threshold for POC1:50 Percent of the 2 Year High Flow Threshold for POC1:50 Year Low Flow Threshold for POC2:50 Percent of the 2 Year High Flow Threshold for POC2:50 Year Low Flow Threshold for POC3:50 Percent of the 2 Year High Flow Threshold for POC3:50 Year Low Flow Threshold for POC4:50 Percent of the 2 Year High Flow Threshold for POC4:50 Year MayCreekTrail_Model2 9/26/2024 7:20:23 PM Page 3 Landuse Basin Data Predeveloped Land Use Offsite 1 Bypass:No GroundWater:No Pervious Land Use acre A B, Pasture, Mod 0.3 Pervious Total 0.3 Impervious Land Use acre ROADS MOD 0.15 Impervious Total 0.15 Basin Total 0.45 MayCreekTrail_Model2 9/26/2024 7:20:23 PM Page 4 DA 1A Bypass:No GroundWater:No Pervious Land Use acre A B, Forest, Mod 0.2 Pervious Total 0.2 Impervious Land Use acre ROADS FLAT 0.09 Impervious Total 0.09 Basin Total 0.29 MayCreekTrail_Model2 9/26/2024 7:20:23 PM Page 5 Offsite 2 Bypass:No GroundWater:No Pervious Land Use acre A B, Pasture, Mod 1.87 Pervious Total 1.87 Impervious Land Use acre ROADS FLAT 1.04 Impervious Total 1.04 Basin Total 2.91 MayCreekTrail_Model2 9/26/2024 7:20:23 PM Page 6 DA 1B Bypass:No GroundWater:No Pervious Land Use acre A B, Forest, Mod 0.01 Pervious Total 0.01 Impervious Land Use acre ROADS FLAT 0.04 Impervious Total 0.04 Basin Total 0.05 MayCreekTrail_Model2 9/26/2024 7:20:23 PM Page 7 DA 3 Bypass:No GroundWater:No Pervious Land Use acre A B, Forest, Mod 0.61 Pervious Total 0.61 Impervious Land Use acre Impervious Total 0 Basin Total 0.61 MayCreekTrail_Model2 9/26/2024 7:20:23 PM Page 8 DA 7 Bypass:No GroundWater:No Pervious Land Use acre A B, Forest, Mod 0.28 Pervious Total 0.28 Impervious Land Use acre Impervious Total 0 Basin Total 0.28 MayCreekTrail_Model2 9/26/2024 7:20:23 PM Page 9 Mitigated Land Use Offsite 1 Bypass:No GroundWater:No Pervious Land Use acre A B, Pasture, Mod 0.3 Pervious Total 0.3 Impervious Land Use acre ROADS MOD 0.15 Impervious Total 0.15 Basin Total 0.45 MayCreekTrail_Model2 9/26/2024 7:20:23 PM Page 10 DA 1A Bypass:Yes GroundWater:No Pervious Land Use acre A B, Forest, Mod 0.2 Pervious Total 0.2 Impervious Land Use acre ROADS FLAT 0.09 Impervious Total 0.09 Basin Total 0.29 MayCreekTrail_Model2 9/26/2024 7:20:23 PM Page 11 Offsite 2 Bypass:Yes GroundWater:No Pervious Land Use acre A B, Pasture, Mod 1.87 Pervious Total 1.87 Impervious Land Use acre ROADS FLAT 1.04 Impervious Total 1.04 Basin Total 2.91 MayCreekTrail_Model2 9/26/2024 7:20:23 PM Page 12 DA 1B Bypass:No GroundWater:No Pervious Land Use acre Pervious Total 0 Impervious Land Use acre ROADS FLAT 0.05 Impervious Total 0.05 Basin Total 0.05 MayCreekTrail_Model2 9/26/2024 7:20:23 PM Page 13 DA 3 Bypass:No GroundWater:No Pervious Land Use acre A B, Forest, Mod 0.61 Pervious Total 0.61 Impervious Land Use acre Impervious Total 0 Basin Total 0.61 MayCreekTrail_Model2 9/26/2024 7:20:23 PM Page 14 DA 7 Bypass:No GroundWater:No Pervious Land Use acre A B, Forest, Mod 0.28 Pervious Total 0.28 Impervious Land Use acre Impervious Total 0 Basin Total 0.28 MayCreekTrail_Model2 9/26/2024 7:20:23 PM Page 15 Routing Elements Predeveloped Routing Tank 1 Dimensions Depth:4.25 ft. Tank Type:Circular Diameter:4.25 ft. Length:92 ft. Discharge Structure Riser Height:4.5 ft. Riser Diameter:12 in. Orifice 1 Diameter:12.000 in.Elevation:0 ft. Element Flows To: Outlet 1 Outlet 2 Tank Hydraulic Table Stage(feet)Area(ac.)Volume(ac-ft.)Discharge(cfs)Infilt(cfs) 0.0000 0.000000 0.000000 0.000 0.000 0.0472 0.001882 0.000059 0.849 0.000 0.0944 0.002646 0.000167 1.200 0.000 0.1417 0.003223 0.000306 1.470 0.000 0.1889 0.003700 0.000470 1.698 0.000 0.2361 0.004112 0.000655 1.898 0.000 0.2833 0.004478 0.000858 2.080 0.000 0.3306 0.004808 0.001077 2.246 0.000 0.3778 0.005109 0.001311 2.401 0.000 0.4250 0.005386 0.001559 2.547 0.000 0.4722 0.005642 0.001820 2.685 0.000 0.5194 0.005880 0.002092 2.816 0.000 0.5667 0.006103 0.002375 2.941 0.000 0.6139 0.006311 0.002668 3.061 0.000 0.6611 0.006506 0.002971 3.177 0.000 0.7083 0.006690 0.003282 3.288 0.000 0.7556 0.006864 0.003602 3.396 0.000 0.8028 0.007027 0.003930 3.501 0.000 0.8500 0.007181 0.004266 3.602 0.000 0.8972 0.007326 0.004608 3.701 0.000 0.9444 0.007463 0.004958 3.797 0.000 0.9917 0.007593 0.005313 3.891 0.000 1.0389 0.007715 0.005675 3.983 0.000 1.0861 0.007830 0.006042 4.072 0.000 1.1333 0.007939 0.006414 4.160 0.000 1.1806 0.008041 0.006791 4.245 0.000 1.2278 0.008137 0.007173 4.329 0.000 1.2750 0.008227 0.007560 4.412 0.000 1.3222 0.008311 0.007950 4.493 0.000 1.3694 0.008390 0.008345 4.572 0.000 1.4167 0.008463 0.008743 4.651 0.000 1.4639 0.008531 0.009144 4.728 0.000 1.5111 0.008593 0.009548 4.803 0.000 1.5583 0.008651 0.009955 4.878 0.000 1.6056 0.008704 0.010365 4.951 0.000 1.6528 0.008752 0.010777 5.023 0.000 MayCreekTrail_Model2 9/26/2024 7:20:23 PM Page 16 1.7000 0.008795 0.011192 5.095 0.000 1.7472 0.008833 0.011608 5.165 0.000 1.7944 0.008867 0.012026 5.234 0.000 1.8417 0.008896 0.012445 5.303 0.000 1.8889 0.008921 0.012866 5.370 0.000 1.9361 0.008941 0.013288 5.437 0.000 1.9833 0.008956 0.013710 5.503 0.000 2.0306 0.008967 0.014133 5.568 0.000 2.0778 0.008974 0.014557 5.632 0.000 2.1250 0.008976 0.014981 5.696 0.000 2.1722 0.008974 0.015405 5.759 0.000 2.2194 0.008967 0.015828 5.821 0.000 2.2667 0.008956 0.016252 5.883 0.000 2.3139 0.008941 0.016674 5.944 0.000 2.3611 0.008921 0.017096 6.004 0.000 2.4083 0.008896 0.017517 6.064 0.000 2.4556 0.008867 0.017936 6.123 0.000 2.5028 0.008833 0.018354 6.182 0.000 2.5500 0.008795 0.018770 6.240 0.000 2.5972 0.008752 0.019184 6.297 0.000 2.6444 0.008704 0.019597 6.354 0.000 2.6917 0.008651 0.020006 6.411 0.000 2.7389 0.008593 0.020414 6.467 0.000 2.7861 0.008531 0.020818 6.522 0.000 2.8333 0.008463 0.021219 6.577 0.000 2.8806 0.008390 0.021617 6.632 0.000 2.9278 0.008311 0.022011 6.686 0.000 2.9750 0.008227 0.022402 6.740 0.000 3.0222 0.008137 0.022788 6.793 0.000 3.0694 0.008041 0.023170 6.846 0.000 3.1167 0.007939 0.023548 6.898 0.000 3.1639 0.007830 0.023920 6.950 0.000 3.2111 0.007715 0.024287 7.002 0.000 3.2583 0.007593 0.024649 7.053 0.000 3.3056 0.007463 0.025004 7.104 0.000 3.3528 0.007326 0.025353 7.155 0.000 3.4000 0.007181 0.025696 7.205 0.000 3.4472 0.007027 0.026031 7.255 0.000 3.4944 0.006864 0.026359 7.304 0.000 3.5417 0.006690 0.026679 7.354 0.000 3.5889 0.006506 0.026991 7.402 0.000 3.6361 0.006311 0.027294 7.451 0.000 3.6833 0.006103 0.027587 7.499 0.000 3.7306 0.005880 0.027870 7.547 0.000 3.7778 0.005642 0.028142 7.595 0.000 3.8250 0.005386 0.028402 7.642 0.000 3.8722 0.005109 0.028650 7.689 0.000 3.9194 0.004808 0.028885 7.736 0.000 3.9667 0.004478 0.029104 7.782 0.000 4.0139 0.004112 0.029307 7.829 0.000 4.0611 0.003700 0.029492 7.874 0.000 4.1083 0.003223 0.029655 7.920 0.000 4.1556 0.002646 0.029794 7.965 0.000 4.2028 0.001882 0.029902 8.011 0.000 4.2500 0.000000 0.029962 8.055 0.000 4.2972 0.000000 0.000000 8.100 0.000 MayCreekTrail_Model2 9/26/2024 7:20:23 PM Page 17 Mitigated Routing Tank 1 Dimensions Depth:4.25 ft. Tank Type:Circular Diameter:4.25 ft. Length:92 ft. Discharge Structure Riser Height:4.5 ft. Riser Diameter:12 in. Orifice 1 Diameter:12.000 in.Elevation:0 ft. Element Flows To: Outlet 1 Outlet 2 Tank Hydraulic Table Stage(feet)Area(ac.)Volume(ac-ft.)Discharge(cfs)Infilt(cfs) 0.0000 0.000000 0.000000 0.000 0.000 0.0472 0.001882 0.000059 0.849 0.000 0.0944 0.002646 0.000167 1.200 0.000 0.1417 0.003223 0.000306 1.470 0.000 0.1889 0.003700 0.000470 1.698 0.000 0.2361 0.004112 0.000655 1.898 0.000 0.2833 0.004478 0.000858 2.080 0.000 0.3306 0.004808 0.001077 2.246 0.000 0.3778 0.005109 0.001311 2.401 0.000 0.4250 0.005386 0.001559 2.547 0.000 0.4722 0.005642 0.001820 2.685 0.000 0.5194 0.005880 0.002092 2.816 0.000 0.5667 0.006103 0.002375 2.941 0.000 0.6139 0.006311 0.002668 3.061 0.000 0.6611 0.006506 0.002971 3.177 0.000 0.7083 0.006690 0.003282 3.288 0.000 0.7556 0.006864 0.003602 3.396 0.000 0.8028 0.007027 0.003930 3.501 0.000 0.8500 0.007181 0.004266 3.602 0.000 0.8972 0.007326 0.004608 3.701 0.000 0.9444 0.007463 0.004958 3.797 0.000 0.9917 0.007593 0.005313 3.891 0.000 1.0389 0.007715 0.005675 3.983 0.000 1.0861 0.007830 0.006042 4.072 0.000 1.1333 0.007939 0.006414 4.160 0.000 1.1806 0.008041 0.006791 4.245 0.000 1.2278 0.008137 0.007173 4.329 0.000 1.2750 0.008227 0.007560 4.412 0.000 1.3222 0.008311 0.007950 4.493 0.000 1.3694 0.008390 0.008345 4.572 0.000 1.4167 0.008463 0.008743 4.651 0.000 1.4639 0.008531 0.009144 4.728 0.000 1.5111 0.008593 0.009548 4.803 0.000 1.5583 0.008651 0.009955 4.878 0.000 1.6056 0.008704 0.010365 4.951 0.000 1.6528 0.008752 0.010777 5.023 0.000 1.7000 0.008795 0.011192 5.095 0.000 1.7472 0.008833 0.011608 5.165 0.000 MayCreekTrail_Model2 9/26/2024 7:20:23 PM Page 18 1.7944 0.008867 0.012026 5.234 0.000 1.8417 0.008896 0.012445 5.303 0.000 1.8889 0.008921 0.012866 5.370 0.000 1.9361 0.008941 0.013288 5.437 0.000 1.9833 0.008956 0.013710 5.503 0.000 2.0306 0.008967 0.014133 5.568 0.000 2.0778 0.008974 0.014557 5.632 0.000 2.1250 0.008976 0.014981 5.696 0.000 2.1722 0.008974 0.015405 5.759 0.000 2.2194 0.008967 0.015828 5.821 0.000 2.2667 0.008956 0.016252 5.883 0.000 2.3139 0.008941 0.016674 5.944 0.000 2.3611 0.008921 0.017096 6.004 0.000 2.4083 0.008896 0.017517 6.064 0.000 2.4556 0.008867 0.017936 6.123 0.000 2.5028 0.008833 0.018354 6.182 0.000 2.5500 0.008795 0.018770 6.240 0.000 2.5972 0.008752 0.019184 6.297 0.000 2.6444 0.008704 0.019597 6.354 0.000 2.6917 0.008651 0.020006 6.411 0.000 2.7389 0.008593 0.020414 6.467 0.000 2.7861 0.008531 0.020818 6.522 0.000 2.8333 0.008463 0.021219 6.577 0.000 2.8806 0.008390 0.021617 6.632 0.000 2.9278 0.008311 0.022011 6.686 0.000 2.9750 0.008227 0.022402 6.740 0.000 3.0222 0.008137 0.022788 6.793 0.000 3.0694 0.008041 0.023170 6.846 0.000 3.1167 0.007939 0.023548 6.898 0.000 3.1639 0.007830 0.023920 6.950 0.000 3.2111 0.007715 0.024287 7.002 0.000 3.2583 0.007593 0.024649 7.053 0.000 3.3056 0.007463 0.025004 7.104 0.000 3.3528 0.007326 0.025353 7.155 0.000 3.4000 0.007181 0.025696 7.205 0.000 3.4472 0.007027 0.026031 7.255 0.000 3.4944 0.006864 0.026359 7.304 0.000 3.5417 0.006690 0.026679 7.354 0.000 3.5889 0.006506 0.026991 7.402 0.000 3.6361 0.006311 0.027294 7.451 0.000 3.6833 0.006103 0.027587 7.499 0.000 3.7306 0.005880 0.027870 7.547 0.000 3.7778 0.005642 0.028142 7.595 0.000 3.8250 0.005386 0.028402 7.642 0.000 3.8722 0.005109 0.028650 7.689 0.000 3.9194 0.004808 0.028885 7.736 0.000 3.9667 0.004478 0.029104 7.782 0.000 4.0139 0.004112 0.029307 7.829 0.000 4.0611 0.003700 0.029492 7.874 0.000 4.1083 0.003223 0.029655 7.920 0.000 4.1556 0.002646 0.029794 7.965 0.000 4.2028 0.001882 0.029902 8.011 0.000 4.2500 0.000000 0.029962 8.055 0.000 4.2972 0.000000 0.000000 8.100 0.000 MayCreekTrail_Model2 9/26/2024 7:20:24 PM Page 19 Analysis Results POC 1 + Predeveloped x Mitigated Predeveloped Landuse Totals for POC #1 Total Pervious Area:2.37 Total Impervious Area:1.28 Mitigated Landuse Totals for POC #1 Total Pervious Area:2.37 Total Impervious Area:1.28 Flow Frequency Method:Log Pearson Type III 17B Flow Frequency Return Periods for Predeveloped. POC #1 Return Period Flow(cfs) 2 year 0.497172 5 year 0.62873 10 year 0.718196 25 year 0.834329 50 year 0.923271 100 year 1.014417 Flow Frequency Return Periods for Mitigated. POC #1 Return Period Flow(cfs) 2 year 0.497172 5 year 0.62873 10 year 0.718196 25 year 0.834329 50 year 0.923271 100 year 1.014417 Annual Peaks Annual Peaks for Predeveloped and Mitigated. POC #1 Year Predeveloped Mitigated 1949 0.642 0.642 1950 0.691 0.691 1951 0.409 0.409 1952 0.352 0.352 1953 0.388 0.388 1954 0.403 0.403 1955 0.461 0.461 1956 0.445 0.445 1957 0.506 0.506 1958 0.412 0.412 MayCreekTrail_Model2 9/26/2024 7:20:43 PM Page 20 1959 0.425 0.425 1960 0.415 0.415 1961 0.431 0.431 1962 0.379 0.379 1963 0.424 0.424 1964 0.418 0.418 1965 0.520 0.520 1966 0.347 0.347 1967 0.603 0.603 1968 0.701 0.701 1969 0.475 0.475 1970 0.462 0.462 1971 0.552 0.552 1972 0.564 0.564 1973 0.349 0.349 1974 0.506 0.506 1975 0.576 0.576 1976 0.394 0.394 1977 0.423 0.423 1978 0.530 0.530 1979 0.713 0.713 1980 0.629 0.629 1981 0.514 0.514 1982 0.726 0.726 1983 0.593 0.593 1984 0.371 0.371 1985 0.512 0.512 1986 0.446 0.446 1987 0.688 0.688 1988 0.417 0.417 1989 0.546 0.546 1990 0.877 0.877 1991 0.707 0.707 1992 0.368 0.368 1993 0.329 0.329 1994 0.355 0.355 1995 0.457 0.457 1996 0.514 0.514 1997 0.473 0.473 1998 0.481 0.481 1999 0.989 0.989 2000 0.487 0.487 2001 0.546 0.546 2002 0.620 0.620 2003 0.503 0.503 2004 0.929 0.929 2005 0.417 0.417 2006 0.371 0.371 2007 0.909 0.909 2008 0.688 0.688 2009 0.641 0.641 Ranked Annual Peaks Ranked Annual Peaks for Predeveloped and Mitigated. POC #1 Rank Predeveloped Mitigated 1 0.9888 0.9888 2 0.9290 0.9290 3 0.9091 0.9091 MayCreekTrail_Model2 9/26/2024 7:20:43 PM Page 21 4 0.8768 0.8768 5 0.7262 0.7262 6 0.7135 0.7135 7 0.7068 0.7068 8 0.7005 0.7005 9 0.6909 0.6909 10 0.6884 0.6884 11 0.6879 0.6879 12 0.6423 0.6423 13 0.6410 0.6410 14 0.6294 0.6294 15 0.6196 0.6196 16 0.6030 0.6030 17 0.5928 0.5928 18 0.5765 0.5765 19 0.5643 0.5643 20 0.5524 0.5524 21 0.5464 0.5464 22 0.5463 0.5463 23 0.5299 0.5299 24 0.5205 0.5205 25 0.5139 0.5139 26 0.5136 0.5136 27 0.5118 0.5118 28 0.5059 0.5059 29 0.5056 0.5056 30 0.5029 0.5029 31 0.4871 0.4871 32 0.4807 0.4807 33 0.4746 0.4746 34 0.4725 0.4725 35 0.4620 0.4620 36 0.4612 0.4612 37 0.4572 0.4572 38 0.4455 0.4455 39 0.4454 0.4454 40 0.4308 0.4308 41 0.4253 0.4253 42 0.4240 0.4240 43 0.4228 0.4228 44 0.4181 0.4181 45 0.4174 0.4174 46 0.4172 0.4172 47 0.4152 0.4152 48 0.4120 0.4120 49 0.4086 0.4086 50 0.4028 0.4028 51 0.3935 0.3935 52 0.3879 0.3879 53 0.3792 0.3792 54 0.3708 0.3708 55 0.3705 0.3705 56 0.3685 0.3685 57 0.3547 0.3547 58 0.3517 0.3517 59 0.3491 0.3491 60 0.3468 0.3468 61 0.3290 0.3290 MayCreekTrail_Model2 9/26/2024 7:20:43 PM Page 22 MayCreekTrail_Model2 9/26/2024 7:20:43 PM Page 23 Duration Flows The Facility PASSED Flow(cfs)Predev Mit Percentage Pass/Fail 0.2486 1758 1758 100 Pass 0.2554 1594 1594 100 Pass 0.2622 1429 1429 100 Pass 0.2690 1300 1300 100 Pass 0.2758 1192 1192 100 Pass 0.2827 1080 1080 100 Pass 0.2895 978 978 100 Pass 0.2963 897 897 100 Pass 0.3031 829 829 100 Pass 0.3099 765 765 100 Pass 0.3167 708 708 100 Pass 0.3236 646 646 100 Pass 0.3304 604 604 100 Pass 0.3372 553 553 100 Pass 0.3440 512 512 100 Pass 0.3508 472 472 100 Pass 0.3576 431 431 100 Pass 0.3644 409 409 100 Pass 0.3713 374 374 100 Pass 0.3781 356 356 100 Pass 0.3849 335 335 100 Pass 0.3917 304 304 100 Pass 0.3985 287 287 100 Pass 0.4053 260 260 100 Pass 0.4121 246 246 100 Pass 0.4190 233 233 100 Pass 0.4258 217 217 100 Pass 0.4326 201 201 100 Pass 0.4394 188 188 100 Pass 0.4462 175 175 100 Pass 0.4530 167 167 100 Pass 0.4599 161 161 100 Pass 0.4667 149 149 100 Pass 0.4735 139 139 100 Pass 0.4803 131 131 100 Pass 0.4871 120 120 100 Pass 0.4939 115 115 100 Pass 0.5007 112 112 100 Pass 0.5076 102 102 100 Pass 0.5144 92 92 100 Pass 0.5212 90 90 100 Pass 0.5280 88 88 100 Pass 0.5348 81 81 100 Pass 0.5416 76 76 100 Pass 0.5484 70 70 100 Pass 0.5553 64 64 100 Pass 0.5621 60 60 100 Pass 0.5689 57 57 100 Pass 0.5757 56 56 100 Pass 0.5825 53 53 100 Pass 0.5893 51 51 100 Pass 0.5962 49 49 100 Pass 0.6030 48 48 100 Pass MayCreekTrail_Model2 9/26/2024 7:20:43 PM Page 24 0.6098 46 46 100 Pass 0.6166 42 42 100 Pass 0.6234 38 38 100 Pass 0.6302 32 32 100 Pass 0.6370 31 31 100 Pass 0.6439 28 28 100 Pass 0.6507 27 27 100 Pass 0.6575 25 25 100 Pass 0.6643 22 22 100 Pass 0.6711 21 21 100 Pass 0.6779 20 20 100 Pass 0.6847 20 20 100 Pass 0.6916 16 16 100 Pass 0.6984 16 16 100 Pass 0.7052 13 13 100 Pass 0.7120 11 11 100 Pass 0.7188 10 10 100 Pass 0.7256 10 10 100 Pass 0.7325 9 9 100 Pass 0.7393 9 9 100 Pass 0.7461 9 9 100 Pass 0.7529 9 9 100 Pass 0.7597 9 9 100 Pass 0.7665 9 9 100 Pass 0.7733 9 9 100 Pass 0.7802 9 9 100 Pass 0.7870 9 9 100 Pass 0.7938 9 9 100 Pass 0.8006 9 9 100 Pass 0.8074 9 9 100 Pass 0.8142 8 8 100 Pass 0.8210 7 7 100 Pass 0.8279 7 7 100 Pass 0.8347 7 7 100 Pass 0.8415 7 7 100 Pass 0.8483 7 7 100 Pass 0.8551 7 7 100 Pass 0.8619 7 7 100 Pass 0.8688 6 6 100 Pass 0.8756 5 5 100 Pass 0.8824 3 3 100 Pass 0.8892 3 3 100 Pass 0.8960 3 3 100 Pass 0.9028 3 3 100 Pass 0.9096 3 3 100 Pass 0.9165 2 2 100 Pass 0.9233 2 2 100 Pass MayCreekTrail_Model2 9/26/2024 7:20:43 PM Page 25 Water Quality Water Quality BMP Flow and Volume for POC #1 On-line facility volume:0 acre-feet On-line facility target flow:0 cfs. Adjusted for 15 min:0 cfs. Off-line facility target flow:0 cfs. Adjusted for 15 min:0 cfs. MayCreekTrail_Model2 9/26/2024 7:20:43 PM Page 26 LID Report MayCreekTrail_Model2 9/26/2024 7:22:15 PM Page 27 POC 2 + Predeveloped x Mitigated Predeveloped Landuse Totals for POC #2 Total Pervious Area:0.01 Total Impervious Area:0.04 Mitigated Landuse Totals for POC #2 Total Pervious Area:0 Total Impervious Area:0.05 Flow Frequency Method:Log Pearson Type III 17B Flow Frequency Return Periods for Predeveloped. POC #2 Return Period Flow(cfs) 2 year 0.015253 5 year 0.019265 10 year 0.021991 25 year 0.025527 50 year 0.028233 100 year 0.031005 Flow Frequency Return Periods for Mitigated. POC #2 Return Period Flow(cfs) 2 year 0.019063 5 year 0.024079 10 year 0.027487 25 year 0.031908 50 year 0.035291 100 year 0.038757 Annual Peaks Annual Peaks for Predeveloped and Mitigated. POC #2 Year Predeveloped Mitigated 1949 0.020 0.025 1950 0.021 0.027 1951 0.012 0.015 1952 0.011 0.014 1953 0.012 0.015 1954 0.012 0.016 1955 0.014 0.018 1956 0.014 0.017 1957 0.016 0.020 1958 0.013 0.016 1959 0.013 0.016 MayCreekTrail_Model2 9/26/2024 7:22:36 PM Page 28 1960 0.013 0.016 1961 0.013 0.017 1962 0.012 0.015 1963 0.013 0.016 1964 0.013 0.016 1965 0.016 0.020 1966 0.011 0.014 1967 0.019 0.023 1968 0.021 0.026 1969 0.015 0.018 1970 0.014 0.018 1971 0.017 0.021 1972 0.017 0.022 1973 0.011 0.013 1974 0.015 0.019 1975 0.018 0.022 1976 0.012 0.015 1977 0.013 0.016 1978 0.016 0.020 1979 0.022 0.027 1980 0.019 0.024 1981 0.016 0.020 1982 0.022 0.028 1983 0.018 0.023 1984 0.012 0.014 1985 0.016 0.020 1986 0.014 0.017 1987 0.021 0.027 1988 0.013 0.016 1989 0.016 0.020 1990 0.027 0.034 1991 0.022 0.027 1992 0.011 0.014 1993 0.010 0.012 1994 0.011 0.013 1995 0.014 0.018 1996 0.015 0.019 1997 0.015 0.018 1998 0.015 0.019 1999 0.030 0.038 2000 0.015 0.019 2001 0.017 0.021 2002 0.019 0.024 2003 0.015 0.019 2004 0.028 0.035 2005 0.013 0.016 2006 0.011 0.014 2007 0.026 0.033 2008 0.021 0.027 2009 0.020 0.025 Ranked Annual Peaks Ranked Annual Peaks for Predeveloped and Mitigated. POC #2 Rank Predeveloped Mitigated 1 0.0303 0.0379 2 0.0283 0.0354 3 0.0272 0.0340 4 0.0265 0.0331 MayCreekTrail_Model2 9/26/2024 7:22:36 PM Page 29 5 0.0225 0.0281 6 0.0217 0.0271 7 0.0217 0.0271 8 0.0213 0.0267 9 0.0213 0.0267 10 0.0213 0.0266 11 0.0212 0.0265 12 0.0198 0.0247 13 0.0197 0.0246 14 0.0195 0.0244 15 0.0193 0.0242 16 0.0186 0.0233 17 0.0183 0.0229 18 0.0178 0.0223 19 0.0175 0.0219 20 0.0169 0.0212 21 0.0166 0.0207 22 0.0162 0.0202 23 0.0161 0.0202 24 0.0159 0.0199 25 0.0159 0.0199 26 0.0159 0.0198 27 0.0157 0.0196 28 0.0155 0.0193 29 0.0151 0.0188 30 0.0150 0.0188 31 0.0150 0.0188 32 0.0148 0.0185 33 0.0147 0.0184 34 0.0146 0.0183 35 0.0142 0.0178 36 0.0141 0.0177 37 0.0141 0.0176 38 0.0138 0.0173 39 0.0138 0.0172 40 0.0134 0.0168 41 0.0130 0.0162 42 0.0130 0.0162 43 0.0130 0.0162 44 0.0129 0.0161 45 0.0129 0.0161 46 0.0127 0.0159 47 0.0127 0.0158 48 0.0127 0.0158 49 0.0124 0.0155 50 0.0123 0.0154 51 0.0120 0.0150 52 0.0119 0.0148 53 0.0117 0.0146 54 0.0115 0.0144 55 0.0114 0.0143 56 0.0114 0.0143 57 0.0110 0.0137 58 0.0108 0.0135 59 0.0108 0.0135 60 0.0106 0.0132 61 0.0099 0.0124 MayCreekTrail_Model2 9/26/2024 7:22:36 PM Page 30 MayCreekTrail_Model2 9/26/2024 7:22:36 PM Page 31 Duration Flows The Duration Matching Failed Flow(cfs)Predev Mit Percentage Pass/Fail 0.0076 1800 3728 207 Fail 0.0078 1636 3429 209 Fail 0.0080 1472 3191 216 Fail 0.0083 1343 2943 219 Fail 0.0085 1227 2706 220 Fail 0.0087 1102 2522 228 Fail 0.0089 1003 2327 232 Fail 0.0091 920 2143 232 Fail 0.0093 853 1982 232 Fail 0.0095 790 1826 231 Fail 0.0097 725 1698 234 Fail 0.0099 667 1560 233 Fail 0.0101 611 1437 235 Fail 0.0103 571 1337 234 Fail 0.0105 532 1237 232 Fail 0.0107 491 1145 233 Fail 0.0110 451 1053 233 Fail 0.0112 421 983 233 Fail 0.0114 389 914 234 Fail 0.0116 364 861 236 Fail 0.0118 339 814 240 Fail 0.0120 317 756 238 Fail 0.0122 296 716 241 Fail 0.0124 272 663 243 Fail 0.0126 256 613 239 Fail 0.0128 239 587 245 Fail 0.0130 222 554 249 Fail 0.0132 208 520 250 Fail 0.0135 195 486 249 Fail 0.0137 181 451 249 Fail 0.0139 171 425 248 Fail 0.0141 161 408 253 Fail 0.0143 148 383 258 Fail 0.0145 139 363 261 Fail 0.0147 135 343 254 Fail 0.0149 122 321 263 Fail 0.0151 114 305 267 Fail 0.0153 108 288 266 Fail 0.0155 105 271 258 Fail 0.0157 100 258 258 Fail 0.0160 92 242 263 Fail 0.0162 87 230 264 Fail 0.0164 84 218 259 Fail 0.0166 73 205 280 Fail 0.0168 71 196 276 Fail 0.0170 65 183 281 Fail 0.0172 63 178 282 Fail 0.0174 62 171 275 Fail 0.0176 58 159 274 Fail 0.0178 54 148 274 Fail 0.0180 54 141 261 Fail 0.0182 52 138 265 Fail 0.0185 50 131 262 Fail 0.0187 46 122 265 Fail MayCreekTrail_Model2 9/26/2024 7:22:36 PM Page 32 0.0189 45 114 253 Fail 0.0191 40 108 270 Fail 0.0193 38 107 281 Fail 0.0195 33 104 315 Fail 0.0197 32 100 312 Fail 0.0199 29 93 320 Fail 0.0201 28 89 317 Fail 0.0203 25 84 336 Fail 0.0205 22 81 368 Fail 0.0207 21 73 347 Fail 0.0209 20 72 360 Fail 0.0212 17 68 400 Fail 0.0214 13 65 500 Fail 0.0216 12 63 525 Fail 0.0218 9 62 688 Fail 0.0220 9 59 655 Fail 0.0222 9 57 633 Fail 0.0224 9 54 600 Fail 0.0226 8 53 662 Fail 0.0228 8 52 650 Fail 0.0230 8 50 625 Fail 0.0232 8 49 612 Fail 0.0234 8 45 562 Fail 0.0237 8 44 550 Fail 0.0239 8 40 500 Fail 0.0241 8 39 487 Fail 0.0243 7 35 500 Fail 0.0245 7 33 471 Fail 0.0247 7 31 442 Fail 0.0249 7 28 400 Fail 0.0251 7 28 400 Fail 0.0253 6 26 433 Fail 0.0255 6 24 400 Fail 0.0257 6 21 350 Fail 0.0259 6 21 350 Fail 0.0262 6 20 333 Fail 0.0264 6 17 283 Fail 0.0266 5 16 320 Fail 0.0268 5 12 240 Fail 0.0270 4 12 300 Fail 0.0272 3 9 300 Fail 0.0274 3 9 300 Fail 0.0276 2 9 450 Fail 0.0278 2 9 450 Fail 0.0280 2 9 450 Fail 0.0282 2 8 400 Fail The development has an increase in flow durations from 1/2 Predeveloped 2 year flow to the 2 year flow or more than a 10% increase from the 2 year to the 50 year flow. The development has an increase in flow durations for more than 50% of the flows for the range of the duration analysis. MayCreekTrail_Model2 9/26/2024 7:22:36 PM Page 33 Water Quality Water Quality BMP Flow and Volume for POC #2 On-line facility volume:0 acre-feet On-line facility target flow:0 cfs. Adjusted for 15 min:0 cfs. Off-line facility target flow:0 cfs. Adjusted for 15 min:0 cfs. MayCreekTrail_Model2 9/26/2024 7:22:36 PM Page 34 LID Report MayCreekTrail_Model2 9/26/2024 7:22:36 PM Page 35 POC 3 + Predeveloped x Mitigated Predeveloped Landuse Totals for POC #3 Total Pervious Area:0.61 Total Impervious Area:0 Mitigated Landuse Totals for POC #3 Total Pervious Area:0.61 Total Impervious Area:0 Flow Frequency Method:Log Pearson Type III 17B Flow Frequency Return Periods for Predeveloped. POC #3 Return Period Flow(cfs) 2 year 0.000529 5 year 0.000873 10 year 0.001179 25 year 0.001674 50 year 0.002135 100 year 0.002689 Flow Frequency Return Periods for Mitigated. POC #3 Return Period Flow(cfs) 2 year 0.000529 5 year 0.000873 10 year 0.001179 25 year 0.001674 50 year 0.002135 100 year 0.002689 Annual Peaks Annual Peaks for Predeveloped and Mitigated. POC #3 Year Predeveloped Mitigated 1949 0.000 0.000 1950 0.001 0.001 1951 0.001 0.001 1952 0.000 0.000 1953 0.000 0.000 1954 0.000 0.000 1955 0.000 0.000 1956 0.000 0.000 1957 0.000 0.000 1958 0.000 0.000 1959 0.000 0.000 MayCreekTrail_Model2 9/26/2024 7:22:53 PM Page 36 1960 0.000 0.000 1961 0.000 0.000 1962 0.000 0.000 1963 0.000 0.000 1964 0.000 0.000 1965 0.000 0.000 1966 0.000 0.000 1967 0.000 0.000 1968 0.000 0.000 1969 0.000 0.000 1970 0.000 0.000 1971 0.000 0.000 1972 0.004 0.004 1973 0.000 0.000 1974 0.000 0.000 1975 0.000 0.000 1976 0.000 0.000 1977 0.000 0.000 1978 0.000 0.000 1979 0.000 0.000 1980 0.000 0.000 1981 0.000 0.000 1982 0.000 0.000 1983 0.000 0.000 1984 0.000 0.000 1985 0.000 0.000 1986 0.000 0.000 1987 0.000 0.000 1988 0.000 0.000 1989 0.000 0.000 1990 0.000 0.000 1991 0.001 0.001 1992 0.000 0.000 1993 0.000 0.000 1994 0.000 0.000 1995 0.000 0.000 1996 0.005 0.005 1997 0.001 0.001 1998 0.000 0.000 1999 0.001 0.001 2000 0.000 0.000 2001 0.000 0.000 2002 0.000 0.000 2003 0.000 0.000 2004 0.000 0.000 2005 0.000 0.000 2006 0.000 0.000 2007 0.007 0.007 2008 0.000 0.000 2009 0.000 0.000 Ranked Annual Peaks Ranked Annual Peaks for Predeveloped and Mitigated. POC #3 Rank Predeveloped Mitigated 1 0.0071 0.0071 2 0.0047 0.0047 3 0.0035 0.0035 4 0.0013 0.0013 MayCreekTrail_Model2 9/26/2024 7:22:53 PM Page 37 5 0.0013 0.0013 6 0.0011 0.0011 7 0.0011 0.0011 8 0.0005 0.0005 9 0.0005 0.0005 10 0.0005 0.0005 11 0.0005 0.0005 12 0.0005 0.0005 13 0.0005 0.0005 14 0.0005 0.0005 15 0.0005 0.0005 16 0.0005 0.0005 17 0.0005 0.0005 18 0.0005 0.0005 19 0.0005 0.0005 20 0.0005 0.0005 21 0.0005 0.0005 22 0.0005 0.0005 23 0.0005 0.0005 24 0.0005 0.0005 25 0.0005 0.0005 26 0.0005 0.0005 27 0.0005 0.0005 28 0.0005 0.0005 29 0.0005 0.0005 30 0.0005 0.0005 31 0.0005 0.0005 32 0.0005 0.0005 33 0.0005 0.0005 34 0.0005 0.0005 35 0.0005 0.0005 36 0.0005 0.0005 37 0.0005 0.0005 38 0.0005 0.0005 39 0.0005 0.0005 40 0.0005 0.0005 41 0.0005 0.0005 42 0.0005 0.0005 43 0.0005 0.0005 44 0.0005 0.0005 45 0.0005 0.0005 46 0.0005 0.0005 47 0.0005 0.0005 48 0.0005 0.0005 49 0.0005 0.0005 50 0.0005 0.0005 51 0.0005 0.0005 52 0.0005 0.0005 53 0.0005 0.0005 54 0.0005 0.0005 55 0.0005 0.0005 56 0.0005 0.0005 57 0.0005 0.0005 58 0.0004 0.0004 59 0.0004 0.0004 60 0.0004 0.0004 61 0.0004 0.0004 MayCreekTrail_Model2 9/26/2024 7:22:53 PM Page 38 MayCreekTrail_Model2 9/26/2024 7:22:53 PM Page 39 Duration Flows The Facility PASSED Flow(cfs)Predev Mit Percentage Pass/Fail 0.0003 2926 2926 100 Pass 0.0003 2492 2492 100 Pass 0.0003 2125 2125 100 Pass 0.0003 1801 1801 100 Pass 0.0003 1505 1505 100 Pass 0.0004 1313 1313 100 Pass 0.0004 1093 1093 100 Pass 0.0004 856 856 100 Pass 0.0004 636 636 100 Pass 0.0004 478 478 100 Pass 0.0005 334 334 100 Pass 0.0005 194 194 100 Pass 0.0005 42 42 100 Pass 0.0005 35 35 100 Pass 0.0005 33 33 100 Pass 0.0005 31 31 100 Pass 0.0006 30 30 100 Pass 0.0006 29 29 100 Pass 0.0006 29 29 100 Pass 0.0006 29 29 100 Pass 0.0006 28 28 100 Pass 0.0007 28 28 100 Pass 0.0007 27 27 100 Pass 0.0007 27 27 100 Pass 0.0007 27 27 100 Pass 0.0007 27 27 100 Pass 0.0008 26 26 100 Pass 0.0008 25 25 100 Pass 0.0008 25 25 100 Pass 0.0008 24 24 100 Pass 0.0008 23 23 100 Pass 0.0009 23 23 100 Pass 0.0009 23 23 100 Pass 0.0009 22 22 100 Pass 0.0009 22 22 100 Pass 0.0009 21 21 100 Pass 0.0009 21 21 100 Pass 0.0010 21 21 100 Pass 0.0010 21 21 100 Pass 0.0010 21 21 100 Pass 0.0010 20 20 100 Pass 0.0010 19 19 100 Pass 0.0011 19 19 100 Pass 0.0011 18 18 100 Pass 0.0011 18 18 100 Pass 0.0011 16 16 100 Pass 0.0011 16 16 100 Pass 0.0012 16 16 100 Pass 0.0012 16 16 100 Pass 0.0012 15 15 100 Pass 0.0012 15 15 100 Pass 0.0012 15 15 100 Pass 0.0012 15 15 100 Pass MayCreekTrail_Model2 9/26/2024 7:22:53 PM Page 40 0.0013 15 15 100 Pass 0.0013 14 14 100 Pass 0.0013 13 13 100 Pass 0.0013 13 13 100 Pass 0.0013 13 13 100 Pass 0.0014 13 13 100 Pass 0.0014 13 13 100 Pass 0.0014 13 13 100 Pass 0.0014 12 12 100 Pass 0.0014 11 11 100 Pass 0.0015 11 11 100 Pass 0.0015 11 11 100 Pass 0.0015 11 11 100 Pass 0.0015 11 11 100 Pass 0.0015 10 10 100 Pass 0.0015 10 10 100 Pass 0.0016 10 10 100 Pass 0.0016 9 9 100 Pass 0.0016 9 9 100 Pass 0.0016 9 9 100 Pass 0.0016 9 9 100 Pass 0.0017 9 9 100 Pass 0.0017 8 8 100 Pass 0.0017 8 8 100 Pass 0.0017 8 8 100 Pass 0.0017 8 8 100 Pass 0.0018 8 8 100 Pass 0.0018 8 8 100 Pass 0.0018 8 8 100 Pass 0.0018 8 8 100 Pass 0.0018 8 8 100 Pass 0.0019 8 8 100 Pass 0.0019 8 8 100 Pass 0.0019 8 8 100 Pass 0.0019 8 8 100 Pass 0.0019 8 8 100 Pass 0.0019 8 8 100 Pass 0.0020 8 8 100 Pass 0.0020 8 8 100 Pass 0.0020 8 8 100 Pass 0.0020 8 8 100 Pass 0.0020 8 8 100 Pass 0.0021 8 8 100 Pass 0.0021 8 8 100 Pass 0.0021 8 8 100 Pass 0.0021 8 8 100 Pass 0.0021 8 8 100 Pass MayCreekTrail_Model2 9/26/2024 7:22:53 PM Page 41 Water Quality Water Quality BMP Flow and Volume for POC #3 On-line facility volume:0 acre-feet On-line facility target flow:0 cfs. Adjusted for 15 min:0 cfs. Off-line facility target flow:0 cfs. Adjusted for 15 min:0 cfs. MayCreekTrail_Model2 9/26/2024 7:22:53 PM Page 42 LID Report MayCreekTrail_Model2 9/26/2024 7:22:54 PM Page 43 POC 4 + Predeveloped x Mitigated Predeveloped Landuse Totals for POC #4 Total Pervious Area:0.28 Total Impervious Area:0 Mitigated Landuse Totals for POC #4 Total Pervious Area:0.28 Total Impervious Area:0 Flow Frequency Method:Log Pearson Type III 17B Flow Frequency Return Periods for Predeveloped. POC #4 Return Period Flow(cfs) 2 year 0.000243 5 year 0.000401 10 year 0.000541 25 year 0.000768 50 year 0.00098 100 year 0.001234 Flow Frequency Return Periods for Mitigated. POC #4 Return Period Flow(cfs) 2 year 0.000243 5 year 0.000401 10 year 0.000541 25 year 0.000768 50 year 0.00098 100 year 0.001234 Annual Peaks Annual Peaks for Predeveloped and Mitigated. POC #4 Year Predeveloped Mitigated 1949 0.000 0.000 1950 0.001 0.001 1951 0.001 0.001 1952 0.000 0.000 1953 0.000 0.000 1954 0.000 0.000 1955 0.000 0.000 1956 0.000 0.000 1957 0.000 0.000 1958 0.000 0.000 1959 0.000 0.000 MayCreekTrail_Model2 9/26/2024 7:23:11 PM Page 44 1960 0.000 0.000 1961 0.000 0.000 1962 0.000 0.000 1963 0.000 0.000 1964 0.000 0.000 1965 0.000 0.000 1966 0.000 0.000 1967 0.000 0.000 1968 0.000 0.000 1969 0.000 0.000 1970 0.000 0.000 1971 0.000 0.000 1972 0.002 0.002 1973 0.000 0.000 1974 0.000 0.000 1975 0.000 0.000 1976 0.000 0.000 1977 0.000 0.000 1978 0.000 0.000 1979 0.000 0.000 1980 0.000 0.000 1981 0.000 0.000 1982 0.000 0.000 1983 0.000 0.000 1984 0.000 0.000 1985 0.000 0.000 1986 0.000 0.000 1987 0.000 0.000 1988 0.000 0.000 1989 0.000 0.000 1990 0.000 0.000 1991 0.001 0.001 1992 0.000 0.000 1993 0.000 0.000 1994 0.000 0.000 1995 0.000 0.000 1996 0.002 0.002 1997 0.000 0.000 1998 0.000 0.000 1999 0.001 0.001 2000 0.000 0.000 2001 0.000 0.000 2002 0.000 0.000 2003 0.000 0.000 2004 0.000 0.000 2005 0.000 0.000 2006 0.000 0.000 2007 0.003 0.003 2008 0.000 0.000 2009 0.000 0.000 Ranked Annual Peaks Ranked Annual Peaks for Predeveloped and Mitigated. POC #4 Rank Predeveloped Mitigated 1 0.0032 0.0032 2 0.0022 0.0022 3 0.0016 0.0016 4 0.0006 0.0006 MayCreekTrail_Model2 9/26/2024 7:23:11 PM Page 45 5 0.0006 0.0006 6 0.0005 0.0005 7 0.0005 0.0005 8 0.0003 0.0003 9 0.0002 0.0002 10 0.0002 0.0002 11 0.0002 0.0002 12 0.0002 0.0002 13 0.0002 0.0002 14 0.0002 0.0002 15 0.0002 0.0002 16 0.0002 0.0002 17 0.0002 0.0002 18 0.0002 0.0002 19 0.0002 0.0002 20 0.0002 0.0002 21 0.0002 0.0002 22 0.0002 0.0002 23 0.0002 0.0002 24 0.0002 0.0002 25 0.0002 0.0002 26 0.0002 0.0002 27 0.0002 0.0002 28 0.0002 0.0002 29 0.0002 0.0002 30 0.0002 0.0002 31 0.0002 0.0002 32 0.0002 0.0002 33 0.0002 0.0002 34 0.0002 0.0002 35 0.0002 0.0002 36 0.0002 0.0002 37 0.0002 0.0002 38 0.0002 0.0002 39 0.0002 0.0002 40 0.0002 0.0002 41 0.0002 0.0002 42 0.0002 0.0002 43 0.0002 0.0002 44 0.0002 0.0002 45 0.0002 0.0002 46 0.0002 0.0002 47 0.0002 0.0002 48 0.0002 0.0002 49 0.0002 0.0002 50 0.0002 0.0002 51 0.0002 0.0002 52 0.0002 0.0002 53 0.0002 0.0002 54 0.0002 0.0002 55 0.0002 0.0002 56 0.0002 0.0002 57 0.0002 0.0002 58 0.0002 0.0002 59 0.0002 0.0002 60 0.0002 0.0002 61 0.0002 0.0002 MayCreekTrail_Model2 9/26/2024 7:23:11 PM Page 46 MayCreekTrail_Model2 9/26/2024 7:23:11 PM Page 47 Duration Flows The Facility PASSED Flow(cfs)Predev Mit Percentage Pass/Fail 0.0001 2941 2941 100 Pass 0.0001 2488 2488 100 Pass 0.0001 2152 2152 100 Pass 0.0001 1808 1808 100 Pass 0.0002 1509 1509 100 Pass 0.0002 1317 1317 100 Pass 0.0002 1095 1095 100 Pass 0.0002 851 851 100 Pass 0.0002 644 644 100 Pass 0.0002 483 483 100 Pass 0.0002 331 331 100 Pass 0.0002 202 202 100 Pass 0.0002 47 47 100 Pass 0.0002 35 35 100 Pass 0.0002 33 33 100 Pass 0.0003 31 31 100 Pass 0.0003 30 30 100 Pass 0.0003 30 30 100 Pass 0.0003 29 29 100 Pass 0.0003 29 29 100 Pass 0.0003 28 28 100 Pass 0.0003 28 28 100 Pass 0.0003 27 27 100 Pass 0.0003 27 27 100 Pass 0.0003 27 27 100 Pass 0.0003 27 27 100 Pass 0.0003 26 26 100 Pass 0.0004 26 26 100 Pass 0.0004 25 25 100 Pass 0.0004 24 24 100 Pass 0.0004 23 23 100 Pass 0.0004 23 23 100 Pass 0.0004 23 23 100 Pass 0.0004 22 22 100 Pass 0.0004 22 22 100 Pass 0.0004 21 21 100 Pass 0.0004 21 21 100 Pass 0.0004 21 21 100 Pass 0.0005 21 21 100 Pass 0.0005 21 21 100 Pass 0.0005 20 20 100 Pass 0.0005 19 19 100 Pass 0.0005 19 19 100 Pass 0.0005 18 18 100 Pass 0.0005 18 18 100 Pass 0.0005 16 16 100 Pass 0.0005 16 16 100 Pass 0.0005 16 16 100 Pass 0.0005 16 16 100 Pass 0.0005 15 15 100 Pass 0.0006 15 15 100 Pass 0.0006 15 15 100 Pass 0.0006 15 15 100 Pass MayCreekTrail_Model2 9/26/2024 7:23:11 PM Page 48 0.0006 15 15 100 Pass 0.0006 14 14 100 Pass 0.0006 13 13 100 Pass 0.0006 13 13 100 Pass 0.0006 13 13 100 Pass 0.0006 13 13 100 Pass 0.0006 13 13 100 Pass 0.0006 13 13 100 Pass 0.0007 12 12 100 Pass 0.0007 11 11 100 Pass 0.0007 11 11 100 Pass 0.0007 11 11 100 Pass 0.0007 11 11 100 Pass 0.0007 11 11 100 Pass 0.0007 10 10 100 Pass 0.0007 10 10 100 Pass 0.0007 10 10 100 Pass 0.0007 9 9 100 Pass 0.0007 9 9 100 Pass 0.0007 9 9 100 Pass 0.0008 9 9 100 Pass 0.0008 9 9 100 Pass 0.0008 8 8 100 Pass 0.0008 8 8 100 Pass 0.0008 8 8 100 Pass 0.0008 8 8 100 Pass 0.0008 8 8 100 Pass 0.0008 8 8 100 Pass 0.0008 8 8 100 Pass 0.0008 8 8 100 Pass 0.0008 8 8 100 Pass 0.0008 8 8 100 Pass 0.0009 8 8 100 Pass 0.0009 8 8 100 Pass 0.0009 8 8 100 Pass 0.0009 8 8 100 Pass 0.0009 8 8 100 Pass 0.0009 8 8 100 Pass 0.0009 8 8 100 Pass 0.0009 8 8 100 Pass 0.0009 8 8 100 Pass 0.0009 8 8 100 Pass 0.0009 8 8 100 Pass 0.0010 8 8 100 Pass 0.0010 8 8 100 Pass 0.0010 8 8 100 Pass 0.0010 8 8 100 Pass MayCreekTrail_Model2 9/26/2024 7:23:11 PM Page 49 Water Quality Water Quality BMP Flow and Volume for POC #4 On-line facility volume:0 acre-feet On-line facility target flow:0 cfs. Adjusted for 15 min:0 cfs. Off-line facility target flow:0 cfs. Adjusted for 15 min:0 cfs. MayCreekTrail_Model2 9/26/2024 7:23:11 PM Page 50 LID Report MayCreekTrail_Model2 9/26/2024 7:23:11 PM Page 55 Model Default Modifications Total of 0 changes have been made. PERLND Changes No PERLND changes have been made. IMPLND Changes No IMPLND changes have been made. MayCreekTrail_Model2 9/26/2024 7:23:11 PM Page 56 Appendix Predeveloped Schematic MayCreekTrail_Model2 9/26/2024 7:23:11 PM Page 57 Mitigated Schematic MayCreekTrail_Model2 9/26/2024 7:23:11 PM Page 58 Predeveloped UCI File RUN GLOBAL WWHM4 model simulation START 1948 10 01 END 2009 09 30 RUN INTERP OUTPUT LEVEL 3 0 RESUME 0 RUN 1 UNIT SYSTEM 1 END GLOBAL FILES <File> <Un#> <-----------File Name------------------------------>*** <-ID-> *** WDM 26 MayCreekTrail_Model2.wdm MESSU 25 PreMayCreekTrail_Model2.MES 27 PreMayCreekTrail_Model2.L61 28 PreMayCreekTrail_Model2.L62 30 POCMayCreekTrail_Model21.dat 31 POCMayCreekTrail_Model22.dat 32 POCMayCreekTrail_Model23.dat 33 POCMayCreekTrail_Model24.dat END FILES OPN SEQUENCE INGRP INDELT 00:15 PERLND 5 IMPLND 2 PERLND 2 IMPLND 1 RCHRES 1 COPY 501 COPY 502 COPY 503 COPY 504 DISPLY 1 DISPLY 2 DISPLY 3 DISPLY 4 END INGRP END OPN SEQUENCE DISPLY DISPLY-INFO1 # - #<----------Title----------->***TRAN PIVL DIG1 FIL1 PYR DIG2 FIL2 YRND 1 DA 1A MAX 1 2 30 9 2 DA 1B MAX 1 2 31 9 3 DA 3 MAX 1 2 32 9 4 DA 7 MAX 1 2 33 9 END DISPLY-INFO1 END DISPLY COPY TIMESERIES # - # NPT NMN *** 1 1 1 501 1 1 502 1 1 503 1 1 504 1 1 END TIMESERIES END COPY GENER OPCODE # # OPCD *** END OPCODE PARM # # K *** END PARM END GENER PERLND GEN-INFO MayCreekTrail_Model2 9/26/2024 7:23:11 PM Page 59 <PLS ><-------Name------->NBLKS Unit-systems Printer *** # - # User t-series Engl Metr *** in out *** 5 A/B, Pasture, Mod 1 1 1 1 27 0 2 A/B, Forest, Mod 1 1 1 1 27 0 END GEN-INFO *** Section PWATER*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # ATMP SNOW PWAT SED PST PWG PQAL MSTL PEST NITR PHOS TRAC *** 5 0 0 1 0 0 0 0 0 0 0 0 0 2 0 0 1 0 0 0 0 0 0 0 0 0 END ACTIVITY PRINT-INFO <PLS > ***************** Print-flags ***************************** PIVL PYR # - # ATMP SNOW PWAT SED PST PWG PQAL MSTL PEST NITR PHOS TRAC ********* 5 0 0 4 0 0 0 0 0 0 0 0 0 1 9 2 0 0 4 0 0 0 0 0 0 0 0 0 1 9 END PRINT-INFO PWAT-PARM1 <PLS > PWATER variable monthly parameter value flags *** # - # CSNO RTOP UZFG VCS VUZ VNN VIFW VIRC VLE INFC HWT *** 5 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 END PWAT-PARM1 PWAT-PARM2 <PLS > PWATER input info: Part 2 *** # - # ***FOREST LZSN INFILT LSUR SLSUR KVARY AGWRC 5 0 5 1.5 400 0.1 0.3 0.996 2 0 5 2 400 0.1 0.3 0.996 END PWAT-PARM2 PWAT-PARM3 <PLS > PWATER input info: Part 3 *** # - # ***PETMAX PETMIN INFEXP INFILD DEEPFR BASETP AGWETP 5 0 0 2 2 0 0 0 2 0 0 2 2 0 0 0 END PWAT-PARM3 PWAT-PARM4 <PLS > PWATER input info: Part 4 *** # - # CEPSC UZSN NSUR INTFW IRC LZETP *** 5 0.15 0.5 0.3 0 0.7 0.4 2 0.2 0.5 0.35 0 0.7 0.7 END PWAT-PARM4 PWAT-STATE1 <PLS > *** Initial conditions at start of simulation ran from 1990 to end of 1992 (pat 1-11-95) RUN 21 *** # - # *** CEPS SURS UZS IFWS LZS AGWS GWVS 5 0 0 0 0 3 1 0 2 0 0 0 0 3 1 0 END PWAT-STATE1 END PERLND IMPLND GEN-INFO <PLS ><-------Name-------> Unit-systems Printer *** # - # User t-series Engl Metr *** in out *** 2 ROADS/MOD 1 1 1 27 0 1 ROADS/FLAT 1 1 1 27 0 END GEN-INFO *** Section IWATER*** ACTIVITY MayCreekTrail_Model2 9/26/2024 7:23:11 PM Page 60 <PLS > ************* Active Sections ***************************** # - # ATMP SNOW IWAT SLD IWG IQAL *** 2 0 0 1 0 0 0 1 0 0 1 0 0 0 END ACTIVITY PRINT-INFO <ILS > ******** Print-flags ******** PIVL PYR # - # ATMP SNOW IWAT SLD IWG IQAL ********* 2 0 0 4 0 0 4 1 9 1 0 0 4 0 0 0 1 9 END PRINT-INFO IWAT-PARM1 <PLS > IWATER variable monthly parameter value flags *** # - # CSNO RTOP VRS VNN RTLI *** 2 0 0 0 0 0 1 0 0 0 0 0 END IWAT-PARM1 IWAT-PARM2 <PLS > IWATER input info: Part 2 *** # - # *** LSUR SLSUR NSUR RETSC 2 400 0.05 0.1 0.08 1 400 0.01 0.1 0.1 END IWAT-PARM2 IWAT-PARM3 <PLS > IWATER input info: Part 3 *** # - # ***PETMAX PETMIN 2 0 0 1 0 0 END IWAT-PARM3 IWAT-STATE1 <PLS > *** Initial conditions at start of simulation # - # *** RETS SURS 2 0 0 1 0 0 END IWAT-STATE1 END IMPLND SCHEMATIC <-Source-> <--Area--> <-Target-> MBLK *** <Name> # <-factor-> <Name> # Tbl# *** Offsite 1*** PERLND 5 0.3 RCHRES 1 2 PERLND 5 0.3 RCHRES 1 3 IMPLND 2 0.15 RCHRES 1 5 DA 1A*** PERLND 2 0.2 COPY 501 12 PERLND 2 0.2 COPY 501 13 IMPLND 1 0.09 COPY 501 15 Offsite 2*** PERLND 5 1.87 COPY 501 12 PERLND 5 1.87 COPY 501 13 IMPLND 1 1.04 COPY 501 15 DA 1B*** PERLND 2 0.01 COPY 502 12 PERLND 2 0.01 COPY 502 13 IMPLND 1 0.04 COPY 502 15 DA 3*** PERLND 2 0.61 COPY 503 12 PERLND 2 0.61 COPY 503 13 DA 7*** PERLND 2 0.28 COPY 504 12 PERLND 2 0.28 COPY 504 13 ******Routing****** MayCreekTrail_Model2 9/26/2024 7:23:11 PM Page 61 RCHRES 1 1 COPY 501 16 END SCHEMATIC NETWORK <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> # <Name> # #<-factor->strg <Name> # # <Name> # # *** COPY 501 OUTPUT MEAN 1 1 48.4 DISPLY 1 INPUT TIMSER 1 COPY 502 OUTPUT MEAN 1 1 48.4 DISPLY 2 INPUT TIMSER 1 COPY 503 OUTPUT MEAN 1 1 48.4 DISPLY 3 INPUT TIMSER 1 COPY 504 OUTPUT MEAN 1 1 48.4 DISPLY 4 INPUT TIMSER 1 <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> # <Name> # #<-factor->strg <Name> # # <Name> # # *** END NETWORK RCHRES GEN-INFO RCHRES Name Nexits Unit Systems Printer *** # - #<------------------><---> User T-series Engl Metr LKFG *** in out *** 1 Tank 1 1 1 1 1 28 0 1 END GEN-INFO *** Section RCHRES*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # HYFG ADFG CNFG HTFG SDFG GQFG OXFG NUFG PKFG PHFG *** 1 1 0 0 0 0 0 0 0 0 0 END ACTIVITY PRINT-INFO <PLS > ***************** Print-flags ******************* PIVL PYR # - # HYDR ADCA CONS HEAT SED GQL OXRX NUTR PLNK PHCB PIVL PYR ********* 1 4 0 0 0 0 0 0 0 0 0 1 9 END PRINT-INFO HYDR-PARM1 RCHRES Flags for each HYDR Section *** # - # VC A1 A2 A3 ODFVFG for each *** ODGTFG for each FUNCT for each FG FG FG FG possible exit *** possible exit possible exit * * * * * * * * * * * * * * *** 1 0 1 0 0 4 0 0 0 0 0 0 0 0 0 2 2 2 2 2 END HYDR-PARM1 HYDR-PARM2 # - # FTABNO LEN DELTH STCOR KS DB50 *** <------><--------><--------><--------><--------><--------><--------> *** 1 1 0.02 0.0 0.0 0.5 0.0 END HYDR-PARM2 HYDR-INIT RCHRES Initial conditions for each HYDR section *** # - # *** VOL Initial value of COLIND Initial value of OUTDGT *** ac-ft for each possible exit for each possible exit <------><--------> <---><---><---><---><---> *** <---><---><---><---><---> 1 0 4.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 END HYDR-INIT END RCHRES SPEC-ACTIONS END SPEC-ACTIONS FTABLES FTABLE 1 91 4 Depth Area Volume Outflow1 Velocity Travel Time*** (ft) (acres) (acre-ft) (cfs) (ft/sec) (Minutes)*** 0.000000 0.000000 0.000000 0.000000 0.047222 0.001882 0.000059 0.849170 0.094444 0.002646 0.000167 1.200907 MayCreekTrail_Model2 9/26/2024 7:23:11 PM Page 62 0.141667 0.003223 0.000306 1.470805 0.188889 0.003700 0.000470 1.698339 0.236111 0.004112 0.000655 1.898801 0.283333 0.004478 0.000858 2.080032 0.330556 0.004808 0.001077 2.246692 0.377778 0.005109 0.001311 2.401814 0.425000 0.005386 0.001559 2.547509 0.472222 0.005642 0.001820 2.685310 0.519444 0.005880 0.002092 2.816377 0.566667 0.006103 0.002375 2.941610 0.613889 0.006311 0.002668 3.061724 0.661111 0.006506 0.002971 3.177302 0.708333 0.006690 0.003282 3.288820 0.755556 0.006864 0.003602 3.396678 0.802778 0.007027 0.003930 3.501216 0.850000 0.007181 0.004266 3.602721 0.897222 0.007326 0.004608 3.701444 0.944444 0.007463 0.004958 3.797602 0.991667 0.007593 0.005313 3.891384 1.038889 0.007715 0.005675 3.982958 1.086111 0.007830 0.006042 4.072474 1.133333 0.007939 0.006414 4.160064 1.180556 0.008041 0.006791 4.245848 1.227778 0.008137 0.007173 4.329932 1.275000 0.008227 0.007560 4.412415 1.322222 0.008311 0.007950 4.493383 1.369444 0.008390 0.008345 4.572918 1.416667 0.008463 0.008743 4.651093 1.463889 0.008531 0.009144 4.727976 1.511111 0.008593 0.009548 4.803629 1.558333 0.008651 0.009955 4.878108 1.605556 0.008704 0.010365 4.951467 1.652778 0.008752 0.010777 5.023755 1.700000 0.008795 0.011192 5.095017 1.747222 0.008833 0.011608 5.165297 1.794444 0.008867 0.012026 5.234633 1.841667 0.008896 0.012445 5.303062 1.888889 0.008921 0.012866 5.370620 1.936111 0.008941 0.013288 5.437338 1.983333 0.008956 0.013710 5.503248 2.030556 0.008967 0.014133 5.568377 2.077778 0.008974 0.014557 5.632754 2.125000 0.008976 0.014981 5.696403 2.172222 0.008974 0.015405 5.759348 2.219444 0.008967 0.015828 5.821613 2.266667 0.008956 0.016252 5.883219 2.313889 0.008941 0.016674 5.944187 2.361111 0.008921 0.017096 6.004536 2.408333 0.008896 0.017517 6.064284 2.455556 0.008867 0.017936 6.123449 2.502778 0.008833 0.018354 6.182048 2.550000 0.008795 0.018770 6.240096 2.597222 0.008752 0.019184 6.297610 2.644444 0.008704 0.019597 6.354603 2.691667 0.008651 0.020006 6.411090 2.738889 0.008593 0.020414 6.467083 2.786111 0.008531 0.020818 6.522595 2.833333 0.008463 0.021219 6.577639 2.880556 0.008390 0.021617 6.632226 2.927778 0.008311 0.022011 6.686368 2.975000 0.008227 0.022402 6.740075 3.022222 0.008137 0.022788 6.793357 3.069444 0.008041 0.023170 6.846224 3.116667 0.007939 0.023548 6.898686 3.163889 0.007830 0.023920 6.950753 3.211111 0.007715 0.024287 7.002432 3.258333 0.007593 0.024649 7.053732 3.305556 0.007463 0.025004 7.104662 3.352778 0.007326 0.025353 7.155230 3.400000 0.007181 0.025696 7.205443 MayCreekTrail_Model2 9/26/2024 7:23:11 PM Page 63 3.447222 0.007027 0.026031 7.255308 3.494444 0.006864 0.026359 7.304833 3.541667 0.006690 0.026679 7.354024 3.588889 0.006506 0.026991 7.402889 3.636111 0.006311 0.027294 7.451433 3.683333 0.006103 0.027587 7.499663 3.730556 0.005880 0.027870 7.547584 3.777778 0.005642 0.028142 7.595204 3.825000 0.005386 0.028402 7.642526 3.872222 0.005109 0.028650 7.689558 3.919444 0.004808 0.028885 7.736303 3.966667 0.004478 0.029104 7.782768 4.013889 0.004112 0.029307 7.828957 4.061111 0.003700 0.029492 7.874875 4.108333 0.003223 0.029655 7.920527 4.155556 0.002646 0.029794 7.965917 4.202778 0.001882 0.029902 8.011050 4.250000 0.001000 0.029962 8.055930 END FTABLE 1 END FTABLES EXT SOURCES <-Volume-> <Member> SsysSgap<--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> # <Name> # tem strg<-factor->strg <Name> # # <Name> # # *** WDM 2 PREC ENGL 1 PERLND 1 999 EXTNL PREC WDM 2 PREC ENGL 1 IMPLND 1 999 EXTNL PREC WDM 1 EVAP ENGL 0.76 PERLND 1 999 EXTNL PETINP WDM 1 EVAP ENGL 0.76 IMPLND 1 999 EXTNL PETINP END EXT SOURCES EXT TARGETS <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Volume-> <Member> Tsys Tgap Amd *** <Name> # <Name> # #<-factor->strg <Name> # <Name> tem strg strg*** COPY 501 OUTPUT MEAN 1 1 48.4 WDM 501 FLOW ENGL REPL RCHRES 1 HYDR RO 1 1 1 WDM 1000 FLOW ENGL REPL RCHRES 1 HYDR STAGE 1 1 1 WDM 1001 STAG ENGL REPL COPY 502 OUTPUT MEAN 1 1 48.4 WDM 502 FLOW ENGL REPL COPY 503 OUTPUT MEAN 1 1 48.4 WDM 503 FLOW ENGL REPL COPY 504 OUTPUT MEAN 1 1 48.4 WDM 504 FLOW ENGL REPL END EXT TARGETS MASS-LINK <Volume> <-Grp> <-Member-><--Mult--> <Target> <-Grp> <-Member->*** <Name> <Name> # #<-factor-> <Name> <Name> # #*** MASS-LINK 2 PERLND PWATER SURO 0.083333 RCHRES INFLOW IVOL END MASS-LINK 2 MASS-LINK 3 PERLND PWATER IFWO 0.083333 RCHRES INFLOW IVOL END MASS-LINK 3 MASS-LINK 5 IMPLND IWATER SURO 0.083333 RCHRES INFLOW IVOL END MASS-LINK 5 MASS-LINK 12 PERLND PWATER SURO 0.083333 COPY INPUT MEAN END MASS-LINK 12 MASS-LINK 13 PERLND PWATER IFWO 0.083333 COPY INPUT MEAN END MASS-LINK 13 MASS-LINK 15 IMPLND IWATER SURO 0.083333 COPY INPUT MEAN END MASS-LINK 15 MASS-LINK 16 MayCreekTrail_Model2 9/26/2024 7:23:11 PM Page 64 RCHRES ROFLOW COPY INPUT MEAN END MASS-LINK 16 END MASS-LINK END RUN MayCreekTrail_Model2 9/26/2024 7:23:11 PM Page 65 Mitigated UCI File RUN GLOBAL WWHM4 model simulation START 1948 10 01 END 2009 09 30 RUN INTERP OUTPUT LEVEL 3 0 RESUME 0 RUN 1 UNIT SYSTEM 1 END GLOBAL FILES <File> <Un#> <-----------File Name------------------------------>*** <-ID-> *** WDM 26 MayCreekTrail_Model2.wdm MESSU 25 MitMayCreekTrail_Model2.MES 27 MitMayCreekTrail_Model2.L61 28 MitMayCreekTrail_Model2.L62 31 POCMayCreekTrail_Model22.dat 32 POCMayCreekTrail_Model23.dat 33 POCMayCreekTrail_Model24.dat 30 POCMayCreekTrail_Model21.dat END FILES OPN SEQUENCE INGRP INDELT 00:15 PERLND 5 IMPLND 2 PERLND 2 IMPLND 1 RCHRES 1 COPY 502 COPY 503 COPY 504 COPY 1 COPY 501 COPY 601 DISPLY 2 DISPLY 3 DISPLY 4 DISPLY 1 END INGRP END OPN SEQUENCE DISPLY DISPLY-INFO1 # - #<----------Title----------->***TRAN PIVL DIG1 FIL1 PYR DIG2 FIL2 YRND 2 DA 1B MAX 1 2 31 9 3 DA 3 MAX 1 2 32 9 4 DA 7 MAX 1 2 33 9 1 Tank 1 MAX 1 2 30 9 END DISPLY-INFO1 END DISPLY COPY TIMESERIES # - # NPT NMN *** 1 1 1 502 1 1 503 1 1 504 1 1 501 1 1 601 1 1 END TIMESERIES END COPY GENER OPCODE # # OPCD *** END OPCODE PARM # # K *** END PARM MayCreekTrail_Model2 9/26/2024 7:23:11 PM Page 66 END GENER PERLND GEN-INFO <PLS ><-------Name------->NBLKS Unit-systems Printer *** # - # User t-series Engl Metr *** in out *** 5 A/B, Pasture, Mod 1 1 1 1 27 0 2 A/B, Forest, Mod 1 1 1 1 27 0 END GEN-INFO *** Section PWATER*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # ATMP SNOW PWAT SED PST PWG PQAL MSTL PEST NITR PHOS TRAC *** 5 0 0 1 0 0 0 0 0 0 0 0 0 2 0 0 1 0 0 0 0 0 0 0 0 0 END ACTIVITY PRINT-INFO <PLS > ***************** Print-flags ***************************** PIVL PYR # - # ATMP SNOW PWAT SED PST PWG PQAL MSTL PEST NITR PHOS TRAC ********* 5 0 0 4 0 0 0 0 0 0 0 0 0 1 9 2 0 0 4 0 0 0 0 0 0 0 0 0 1 9 END PRINT-INFO PWAT-PARM1 <PLS > PWATER variable monthly parameter value flags *** # - # CSNO RTOP UZFG VCS VUZ VNN VIFW VIRC VLE INFC HWT *** 5 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 END PWAT-PARM1 PWAT-PARM2 <PLS > PWATER input info: Part 2 *** # - # ***FOREST LZSN INFILT LSUR SLSUR KVARY AGWRC 5 0 5 1.5 400 0.1 0.3 0.996 2 0 5 2 400 0.1 0.3 0.996 END PWAT-PARM2 PWAT-PARM3 <PLS > PWATER input info: Part 3 *** # - # ***PETMAX PETMIN INFEXP INFILD DEEPFR BASETP AGWETP 5 0 0 2 2 0 0 0 2 0 0 2 2 0 0 0 END PWAT-PARM3 PWAT-PARM4 <PLS > PWATER input info: Part 4 *** # - # CEPSC UZSN NSUR INTFW IRC LZETP *** 5 0.15 0.5 0.3 0 0.7 0.4 2 0.2 0.5 0.35 0 0.7 0.7 END PWAT-PARM4 PWAT-STATE1 <PLS > *** Initial conditions at start of simulation ran from 1990 to end of 1992 (pat 1-11-95) RUN 21 *** # - # *** CEPS SURS UZS IFWS LZS AGWS GWVS 5 0 0 0 0 3 1 0 2 0 0 0 0 3 1 0 END PWAT-STATE1 END PERLND IMPLND GEN-INFO <PLS ><-------Name-------> Unit-systems Printer *** # - # User t-series Engl Metr *** in out *** 2 ROADS/MOD 1 1 1 27 0 1 ROADS/FLAT 1 1 1 27 0 END GEN-INFO MayCreekTrail_Model2 9/26/2024 7:23:11 PM Page 67 *** Section IWATER*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # ATMP SNOW IWAT SLD IWG IQAL *** 2 0 0 1 0 0 0 1 0 0 1 0 0 0 END ACTIVITY PRINT-INFO <ILS > ******** Print-flags ******** PIVL PYR # - # ATMP SNOW IWAT SLD IWG IQAL ********* 2 0 0 4 0 0 4 1 9 1 0 0 4 0 0 0 1 9 END PRINT-INFO IWAT-PARM1 <PLS > IWATER variable monthly parameter value flags *** # - # CSNO RTOP VRS VNN RTLI *** 2 0 0 0 0 0 1 0 0 0 0 0 END IWAT-PARM1 IWAT-PARM2 <PLS > IWATER input info: Part 2 *** # - # *** LSUR SLSUR NSUR RETSC 2 400 0.05 0.1 0.08 1 400 0.01 0.1 0.1 END IWAT-PARM2 IWAT-PARM3 <PLS > IWATER input info: Part 3 *** # - # ***PETMAX PETMIN 2 0 0 1 0 0 END IWAT-PARM3 IWAT-STATE1 <PLS > *** Initial conditions at start of simulation # - # *** RETS SURS 2 0 0 1 0 0 END IWAT-STATE1 END IMPLND SCHEMATIC <-Source-> <--Area--> <-Target-> MBLK *** <Name> # <-factor-> <Name> # Tbl# *** Offsite 1*** PERLND 5 0.3 RCHRES 1 2 PERLND 5 0.3 RCHRES 1 3 IMPLND 2 0.15 RCHRES 1 5 DA 1A*** PERLND 2 0.2 COPY 501 12 PERLND 2 0.2 COPY 601 12 PERLND 2 0.2 COPY 501 13 PERLND 2 0.2 COPY 601 13 IMPLND 1 0.09 COPY 501 15 IMPLND 1 0.09 COPY 601 15 Offsite 2*** PERLND 5 1.87 COPY 501 12 PERLND 5 1.87 COPY 601 12 PERLND 5 1.87 COPY 501 13 PERLND 5 1.87 COPY 601 13 IMPLND 1 1.04 COPY 501 15 IMPLND 1 1.04 COPY 601 15 DA 1B*** IMPLND 1 0.05 COPY 502 15 DA 3*** MayCreekTrail_Model2 9/26/2024 7:23:11 PM Page 68 PERLND 2 0.61 COPY 503 12 PERLND 2 0.61 COPY 503 13 DA 7*** PERLND 2 0.28 COPY 504 12 PERLND 2 0.28 COPY 504 13 ******Routing****** PERLND 5 0.3 COPY 1 12 IMPLND 2 0.15 COPY 1 15 PERLND 5 0.3 COPY 1 13 RCHRES 1 1 COPY 501 16 END SCHEMATIC NETWORK <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> # <Name> # #<-factor->strg <Name> # # <Name> # # *** COPY 502 OUTPUT MEAN 1 1 48.4 DISPLY 2 INPUT TIMSER 1 COPY 503 OUTPUT MEAN 1 1 48.4 DISPLY 3 INPUT TIMSER 1 COPY 504 OUTPUT MEAN 1 1 48.4 DISPLY 4 INPUT TIMSER 1 COPY 501 OUTPUT MEAN 1 1 48.4 DISPLY 1 INPUT TIMSER 1 <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> # <Name> # #<-factor->strg <Name> # # <Name> # # *** END NETWORK RCHRES GEN-INFO RCHRES Name Nexits Unit Systems Printer *** # - #<------------------><---> User T-series Engl Metr LKFG *** in out *** 1 Tank 1 1 1 1 1 28 0 1 END GEN-INFO *** Section RCHRES*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # HYFG ADFG CNFG HTFG SDFG GQFG OXFG NUFG PKFG PHFG *** 1 1 0 0 0 0 0 0 0 0 0 END ACTIVITY PRINT-INFO <PLS > ***************** Print-flags ******************* PIVL PYR # - # HYDR ADCA CONS HEAT SED GQL OXRX NUTR PLNK PHCB PIVL PYR ********* 1 4 0 0 0 0 0 0 0 0 0 1 9 END PRINT-INFO HYDR-PARM1 RCHRES Flags for each HYDR Section *** # - # VC A1 A2 A3 ODFVFG for each *** ODGTFG for each FUNCT for each FG FG FG FG possible exit *** possible exit possible exit * * * * * * * * * * * * * * *** 1 0 1 0 0 4 0 0 0 0 0 0 0 0 0 2 2 2 2 2 END HYDR-PARM1 HYDR-PARM2 # - # FTABNO LEN DELTH STCOR KS DB50 *** <------><--------><--------><--------><--------><--------><--------> *** 1 1 0.02 0.0 0.0 0.5 0.0 END HYDR-PARM2 HYDR-INIT RCHRES Initial conditions for each HYDR section *** # - # *** VOL Initial value of COLIND Initial value of OUTDGT *** ac-ft for each possible exit for each possible exit <------><--------> <---><---><---><---><---> *** <---><---><---><---><---> 1 0 4.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 END HYDR-INIT END RCHRES MayCreekTrail_Model2 9/26/2024 7:23:11 PM Page 69 SPEC-ACTIONS END SPEC-ACTIONS FTABLES FTABLE 1 91 4 Depth Area Volume Outflow1 Velocity Travel Time*** (ft) (acres) (acre-ft) (cfs) (ft/sec) (Minutes)*** 0.000000 0.000000 0.000000 0.000000 0.047222 0.001882 0.000059 0.849170 0.094444 0.002646 0.000167 1.200907 0.141667 0.003223 0.000306 1.470805 0.188889 0.003700 0.000470 1.698339 0.236111 0.004112 0.000655 1.898801 0.283333 0.004478 0.000858 2.080032 0.330556 0.004808 0.001077 2.246692 0.377778 0.005109 0.001311 2.401814 0.425000 0.005386 0.001559 2.547509 0.472222 0.005642 0.001820 2.685310 0.519444 0.005880 0.002092 2.816377 0.566667 0.006103 0.002375 2.941610 0.613889 0.006311 0.002668 3.061724 0.661111 0.006506 0.002971 3.177302 0.708333 0.006690 0.003282 3.288820 0.755556 0.006864 0.003602 3.396678 0.802778 0.007027 0.003930 3.501216 0.850000 0.007181 0.004266 3.602721 0.897222 0.007326 0.004608 3.701444 0.944444 0.007463 0.004958 3.797602 0.991667 0.007593 0.005313 3.891384 1.038889 0.007715 0.005675 3.982958 1.086111 0.007830 0.006042 4.072474 1.133333 0.007939 0.006414 4.160064 1.180556 0.008041 0.006791 4.245848 1.227778 0.008137 0.007173 4.329932 1.275000 0.008227 0.007560 4.412415 1.322222 0.008311 0.007950 4.493383 1.369444 0.008390 0.008345 4.572918 1.416667 0.008463 0.008743 4.651093 1.463889 0.008531 0.009144 4.727976 1.511111 0.008593 0.009548 4.803629 1.558333 0.008651 0.009955 4.878108 1.605556 0.008704 0.010365 4.951467 1.652778 0.008752 0.010777 5.023755 1.700000 0.008795 0.011192 5.095017 1.747222 0.008833 0.011608 5.165297 1.794444 0.008867 0.012026 5.234633 1.841667 0.008896 0.012445 5.303062 1.888889 0.008921 0.012866 5.370620 1.936111 0.008941 0.013288 5.437338 1.983333 0.008956 0.013710 5.503248 2.030556 0.008967 0.014133 5.568377 2.077778 0.008974 0.014557 5.632754 2.125000 0.008976 0.014981 5.696403 2.172222 0.008974 0.015405 5.759348 2.219444 0.008967 0.015828 5.821613 2.266667 0.008956 0.016252 5.883219 2.313889 0.008941 0.016674 5.944187 2.361111 0.008921 0.017096 6.004536 2.408333 0.008896 0.017517 6.064284 2.455556 0.008867 0.017936 6.123449 2.502778 0.008833 0.018354 6.182048 2.550000 0.008795 0.018770 6.240096 2.597222 0.008752 0.019184 6.297610 2.644444 0.008704 0.019597 6.354603 2.691667 0.008651 0.020006 6.411090 2.738889 0.008593 0.020414 6.467083 2.786111 0.008531 0.020818 6.522595 2.833333 0.008463 0.021219 6.577639 2.880556 0.008390 0.021617 6.632226 2.927778 0.008311 0.022011 6.686368 MayCreekTrail_Model2 9/26/2024 7:23:11 PM Page 70 2.975000 0.008227 0.022402 6.740075 3.022222 0.008137 0.022788 6.793357 3.069444 0.008041 0.023170 6.846224 3.116667 0.007939 0.023548 6.898686 3.163889 0.007830 0.023920 6.950753 3.211111 0.007715 0.024287 7.002432 3.258333 0.007593 0.024649 7.053732 3.305556 0.007463 0.025004 7.104662 3.352778 0.007326 0.025353 7.155230 3.400000 0.007181 0.025696 7.205443 3.447222 0.007027 0.026031 7.255308 3.494444 0.006864 0.026359 7.304833 3.541667 0.006690 0.026679 7.354024 3.588889 0.006506 0.026991 7.402889 3.636111 0.006311 0.027294 7.451433 3.683333 0.006103 0.027587 7.499663 3.730556 0.005880 0.027870 7.547584 3.777778 0.005642 0.028142 7.595204 3.825000 0.005386 0.028402 7.642526 3.872222 0.005109 0.028650 7.689558 3.919444 0.004808 0.028885 7.736303 3.966667 0.004478 0.029104 7.782768 4.013889 0.004112 0.029307 7.828957 4.061111 0.003700 0.029492 7.874875 4.108333 0.003223 0.029655 7.920527 4.155556 0.002646 0.029794 7.965917 4.202778 0.001882 0.029902 8.011050 4.250000 0.001000 0.029962 8.055930 END FTABLE 1 END FTABLES EXT SOURCES <-Volume-> <Member> SsysSgap<--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> # <Name> # tem strg<-factor->strg <Name> # # <Name> # # *** WDM 2 PREC ENGL 1 PERLND 1 999 EXTNL PREC WDM 2 PREC ENGL 1 IMPLND 1 999 EXTNL PREC WDM 1 EVAP ENGL 0.76 PERLND 1 999 EXTNL PETINP WDM 1 EVAP ENGL 0.76 IMPLND 1 999 EXTNL PETINP END EXT SOURCES EXT TARGETS <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Volume-> <Member> Tsys Tgap Amd *** <Name> # <Name> # #<-factor->strg <Name> # <Name> tem strg strg*** COPY 1 OUTPUT MEAN 1 1 48.4 WDM 701 FLOW ENGL REPL COPY 501 OUTPUT MEAN 1 1 48.4 WDM 801 FLOW ENGL REPL COPY 601 OUTPUT MEAN 1 1 48.4 WDM 901 FLOW ENGL REPL RCHRES 1 HYDR RO 1 1 1 WDM 1002 FLOW ENGL REPL RCHRES 1 HYDR STAGE 1 1 1 WDM 1003 STAG ENGL REPL COPY 2 OUTPUT MEAN 1 1 48.4 WDM 702 FLOW ENGL REPL COPY 502 OUTPUT MEAN 1 1 48.4 WDM 802 FLOW ENGL REPL COPY 602 OUTPUT MEAN 1 1 48.4 WDM 902 FLOW ENGL REPL COPY 3 OUTPUT MEAN 1 1 48.4 WDM 703 FLOW ENGL REPL COPY 503 OUTPUT MEAN 1 1 48.4 WDM 803 FLOW ENGL REPL COPY 603 OUTPUT MEAN 1 1 48.4 WDM 903 FLOW ENGL REPL COPY 4 OUTPUT MEAN 1 1 48.4 WDM 704 FLOW ENGL REPL COPY 504 OUTPUT MEAN 1 1 48.4 WDM 804 FLOW ENGL REPL COPY 604 OUTPUT MEAN 1 1 48.4 WDM 904 FLOW ENGL REPL END EXT TARGETS MASS-LINK <Volume> <-Grp> <-Member-><--Mult--> <Target> <-Grp> <-Member->*** <Name> <Name> # #<-factor-> <Name> <Name> # #*** MASS-LINK 2 PERLND PWATER SURO 0.083333 RCHRES INFLOW IVOL END MASS-LINK 2 MASS-LINK 3 PERLND PWATER IFWO 0.083333 RCHRES INFLOW IVOL END MASS-LINK 3 MayCreekTrail_Model2 9/26/2024 7:23:11 PM Page 71 MASS-LINK 5 IMPLND IWATER SURO 0.083333 RCHRES INFLOW IVOL END MASS-LINK 5 MASS-LINK 12 PERLND PWATER SURO 0.083333 COPY INPUT MEAN END MASS-LINK 12 MASS-LINK 13 PERLND PWATER IFWO 0.083333 COPY INPUT MEAN END MASS-LINK 13 MASS-LINK 15 IMPLND IWATER SURO 0.083333 COPY INPUT MEAN END MASS-LINK 15 MASS-LINK 16 RCHRES ROFLOW COPY INPUT MEAN END MASS-LINK 16 END MASS-LINK END RUN MayCreekTrail_Model2 9/26/2024 7:23:12 PM Page 74 Disclaimer Legal Notice This program and accompanying documentation are provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by End User. Clear Creek Solutions Inc. and the governmental licensee or sublicensees disclaim all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall Clear Creek Solutions Inc. be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the use of, or inability to use this program even if Clear Creek Solutions Inc. or their authorized representatives have been advised of the possibility of such damages. Software Copyright © by : Clear Creek Solutions, Inc. 2005-2024; All Rights Reserved. Clear Creek Solutions, Inc. 6200 Capitol Blvd. Ste F Olympia, WA. 98501 Toll Free 1(866)943-0304 Local (360)943-0304 www.clearcreeksolutions.com APPENDIX C-2HYDRAULIC CALCULATIONS Ditch Downstream Station Downstream Culvert ID Shape Material Side Slope Catchment Area (ac) Time of Concentration TC (min) Runoff Coefficient CC IR (in/hr) Channel Slope (%)Roughness Depth of Flow (in)Q25 (cfs)Velocity (ft/s) 1 1+34.08 Culvert 3 V-Ditch Grass-lined 3:1 0.55 7.5 0.15 2.5127 3.50%0.03 2.3 0.21 1.88 2 3+05.60 Culvert 5 V-Ditch Grass-lined 3:1 0.09 5 0.15 3.2704 4.84%0.03 1.2 0.04 1.40 3 4+23.39 N/A V-Ditch Grass-lined 3:1 0.15 5 0.15 3.2704 0.64%0.03 2.1 0.07 0.76 4 7+22.19 Culvert 6 V-Ditch Grass-lined 3:1 0.09 5 0.15 3.2704 2.41%0.03 1.3 0.04 1.08 Proposed Channel Calculations Pipe ID Upstream Station Material Manning's n Diameter (in)Q25 (cfs)Slope (%)Pipe Length (ft) Normal Depth (in)Velocity (ft/s) 1 0+03.98 RCP 0.013 12 0.83 1.3%30.2 3.7 4.06 2 4+00.04 RCP 0.013 12 0.03 4.7%12.7 0.5 2.37 3 1+34.08 HDPE 0.012 12 0.21 1.4%14.5 1.8 2.96 4 2+05.03 HDPE 0.012 12 0.01 0.7%73 0.5 0.92 5 3+05.60 HDPE 0.012 12 0.04 2.0%16 0.7 2.02 6 7+22.19 HDPE 0.012 12 0.04 2.0%15 0.7 2.02 7 0+60.00 HDPE 0.012 12 0.01 2.0%11 0.4 1.33 Proposed Culvert Calculations Inlet ID Inlet Type Sag/Grade Longitudinal Slope (ft/ft) Road Cross Slope (ft/ft) Surface Flow to Inlet Q25 (cfs) Maximum Allowable Spread (ft) Spread (ft) Flow Depth (Gutter) (In) Bypassed Flow (cfs) CB1 Grate (curved vane)Grade 0.015 0.02 0.04 8.5 1.4 0.5 0 PROPOSED CATCH BASIN TABLE Worksheet for Ditch 1 - 1+34.08 Project Description Manning FormulaFriction Method Normal DepthSolve For Input Data 0.030Roughness Coefficient ft/ft0.035Channel Slope H:V3.000Left Side Slope H:V3.000Right Side Slope cfs0.21Discharge Results in2.3Normal Depth ft²0.1Flow Area ft1.2Wetted Perimeter in1.1Hydraulic Radius ft1.16Top Width in2.4Critical Depth ft/ft0.030Critical Slope ft/s1.88Velocity ft0.06Velocity Head ft0.25Specific Energy 1.069Froude Number SupercriticalFlow Type GVF Input Data in0.0Downstream Depth ft0.0Length 0Number Of Steps GVF Output Data in0.0Upstream Depth N/AProfile Description ft0.00Profile Headloss ft/sInfinityDownstream Velocity ft/sInfinityUpstream Velocity in2.3Normal Depth in2.4Critical Depth ft/ft0.035Channel Slope ft/ft0.030Critical Slope Page 1 of 127 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 9/26/2024 FlowMaster [10.03.00.03] Bentley Systems, Inc. Haestad Methods Solution CenterMayCreek.fm8 Worksheet for Ditch 2 - 3+05.60 Project Description Manning FormulaFriction Method Normal DepthSolve For Input Data 0.030Roughness Coefficient ft/ft0.048Channel Slope H:V3.000Left Side Slope H:V3.000Right Side Slope cfs0.04Discharge Results in1.2Normal Depth ft²0.0Flow Area ft0.6Wetted Perimeter in0.6Hydraulic Radius ft0.58Top Width in1.2Critical Depth ft/ft0.038Critical Slope ft/s1.40Velocity ft0.03Velocity Head ft0.13Specific Energy 1.122Froude Number SupercriticalFlow Type GVF Input Data in0.0Downstream Depth ft0.0Length 0Number Of Steps GVF Output Data in0.0Upstream Depth N/AProfile Description ft0.00Profile Headloss ft/sInfinityDownstream Velocity ft/sInfinityUpstream Velocity in1.2Normal Depth in1.2Critical Depth ft/ft0.048Channel Slope ft/ft0.038Critical Slope Page 1 of 127 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 9/26/2024 FlowMaster [10.03.00.03] Bentley Systems, Inc. Haestad Methods Solution CenterMayCreek.fm8 Worksheet for Ditch 3 - 4+23.39 Project Description Manning FormulaFriction Method Normal DepthSolve For Input Data 0.030Roughness Coefficient ft/ft0.006Channel Slope H:V3.000Left Side Slope H:V3.000Right Side Slope cfs0.07Discharge Results in2.1Normal Depth ft²0.1Flow Area ft1.1Wetted Perimeter in1.0Hydraulic Radius ft1.05Top Width in1.5Critical Depth ft/ft0.035Critical Slope ft/s0.76Velocity ft0.01Velocity Head ft0.18Specific Energy 0.449Froude Number SubcriticalFlow Type GVF Input Data in0.0Downstream Depth ft0.0Length 0Number Of Steps GVF Output Data in0.0Upstream Depth N/AProfile Description ft0.00Profile Headloss ft/sInfinityDownstream Velocity ft/sInfinityUpstream Velocity in2.1Normal Depth in1.5Critical Depth ft/ft0.006Channel Slope ft/ft0.035Critical Slope Page 1 of 127 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 9/26/2024 FlowMaster [10.03.00.03] Bentley Systems, Inc. Haestad Methods Solution CenterMayCreek.fm8 Worksheet for Ditch 4 - 7+22.19 Project Description Manning FormulaFriction Method Normal DepthSolve For Input Data 0.030Roughness Coefficient ft/ft0.024Channel Slope H:V3.000Left Side Slope H:V3.000Right Side Slope cfs0.04Discharge Results in1.3Normal Depth ft²0.0Flow Area ft0.7Wetted Perimeter in0.6Hydraulic Radius ft0.67Top Width in1.2Critical Depth ft/ft0.038Critical Slope ft/s1.08Velocity ft0.02Velocity Head ft0.13Specific Energy 0.807Froude Number SubcriticalFlow Type GVF Input Data in0.0Downstream Depth ft0.0Length 0Number Of Steps GVF Output Data in0.0Upstream Depth N/AProfile Description ft0.00Profile Headloss ft/sInfinityDownstream Velocity ft/sInfinityUpstream Velocity in1.3Normal Depth in1.2Critical Depth ft/ft0.024Channel Slope ft/ft0.038Critical Slope Page 1 of 127 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 9/26/2024 FlowMaster [10.03.00.03] Bentley Systems, Inc. Haestad Methods Solution CenterMayCreek.fm8 Worksheet for Circular Pipe - 1_0+03.98 Project Description Manning FormulaFriction Method Normal DepthSolve For Input Data 0.013Roughness Coefficient ft/ft0.013Channel Slope in12.0Diameter cfs0.83Discharge Results in3.7Normal Depth ft²0.2Flow Area ft1.2Wetted Perimeter in2.1Hydraulic Radius ft0.92Top Width in4.6Critical Depth %30.7Percent Full ft/ft0.006Critical Slope ft/s4.06Velocity ft0.26Velocity Head ft0.56Specific Energy 1.522Froude Number cfs4.37Maximum Discharge cfs4.06Discharge Full ft/ft0.001Slope Full SupercriticalFlow Type GVF Input Data in0.0Downstream Depth ft0.0Length 0Number Of Steps GVF Output Data in0.0Upstream Depth N/AProfile Description ft0.00Profile Headloss %0.0Average End Depth Over Rise %30.7Normal Depth Over Rise ft/sInfinityDownstream Velocity ft/sInfinityUpstream Velocity in3.7Normal Depth in4.6Critical Depth ft/ft0.013Channel Slope ft/ft0.006Critical Slope Page 1 of 127 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 9/26/2024 FlowMaster [10.03.00.03] Bentley Systems, Inc. Haestad Methods Solution CenterMayCreek.fm8 Worksheet for Circular Pipe - 2_4+00.04 Project Description Manning FormulaFriction Method Normal DepthSolve For Input Data 0.013Roughness Coefficient ft/ft0.047Channel Slope in12.0Diameter cfs0.03Discharge Results in0.5Normal Depth ft²0.0Flow Area ft0.4Wetted Perimeter in0.4Hydraulic Radius ft0.42Top Width in0.8Critical Depth %4.5Percent Full ft/ft0.007Critical Slope ft/s2.37Velocity ft0.09Velocity Head ft0.13Specific Energy 2.396Froude Number cfs8.31Maximum Discharge cfs7.72Discharge Full ft/ft0.000Slope Full SupercriticalFlow Type GVF Input Data in0.0Downstream Depth ft0.0Length 0Number Of Steps GVF Output Data in0.0Upstream Depth N/AProfile Description ft0.00Profile Headloss %0.0Average End Depth Over Rise %4.5Normal Depth Over Rise ft/sInfinityDownstream Velocity ft/sInfinityUpstream Velocity in0.5Normal Depth in0.8Critical Depth ft/ft0.047Channel Slope ft/ft0.007Critical Slope Page 1 of 127 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 9/26/2024 FlowMaster [10.03.00.03] Bentley Systems, Inc. Haestad Methods Solution CenterMayCreek.fm8 Worksheet for Circular Pipe - 3_1+34.08 Project Description Manning FormulaFriction Method Normal DepthSolve For Input Data 0.012Roughness Coefficient ft/ft0.014Channel Slope in12.0Diameter cfs0.21Discharge Results in1.8Normal Depth ft²0.1Flow Area ft0.8Wetted Perimeter in1.1Hydraulic Radius ft0.71Top Width in2.3Critical Depth %14.6Percent Full ft/ft0.005Critical Slope ft/s2.96Velocity ft0.14Velocity Head ft0.28Specific Energy 1.643Froude Number cfs4.91Maximum Discharge cfs4.57Discharge Full ft/ft0.000Slope Full SupercriticalFlow Type GVF Input Data in0.0Downstream Depth ft0.0Length 0Number Of Steps GVF Output Data in0.0Upstream Depth N/AProfile Description ft0.00Profile Headloss %0.0Average End Depth Over Rise %14.6Normal Depth Over Rise ft/sInfinityDownstream Velocity ft/sInfinityUpstream Velocity in1.8Normal Depth in2.3Critical Depth ft/ft0.014Channel Slope ft/ft0.005Critical Slope Page 1 of 127 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 9/30/2024 FlowMaster [10.03.00.03] Bentley Systems, Inc. Haestad Methods Solution CenterMayCreek.fm8 Worksheet for Circular Pipe - 4_2+05.03 Project Description Manning FormulaFriction Method Normal DepthSolve For Input Data 0.012Roughness Coefficient ft/ft0.007Channel Slope in12.0Diameter cfs0.01Discharge Results in0.5Normal Depth ft²0.0Flow Area ft0.4Wetted Perimeter in0.3Hydraulic Radius ft0.40Top Width in0.5Critical Depth %4.1Percent Full ft/ft0.007Critical Slope ft/s0.92Velocity ft0.01Velocity Head ft0.05Specific Energy 0.984Froude Number cfs3.47Maximum Discharge cfs3.23Discharge Full ft/ft0.000Slope Full SubcriticalFlow Type GVF Input Data in0.0Downstream Depth ft0.0Length 0Number Of Steps GVF Output Data in0.0Upstream Depth N/AProfile Description ft0.00Profile Headloss %0.0Average End Depth Over Rise %17.3Normal Depth Over Rise ft/sInfinityDownstream Velocity ft/sInfinityUpstream Velocity in0.5Normal Depth in0.5Critical Depth ft/ft0.007Channel Slope ft/ft0.007Critical Slope Page 1 of 127 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 9/26/2024 FlowMaster [10.03.00.03] Bentley Systems, Inc. Haestad Methods Solution CenterMayCreek.fm8 Worksheet for Circular Pipe - 5_3+05.60 Project Description Manning FormulaFriction Method Normal DepthSolve For Input Data 0.012Roughness Coefficient ft/ft0.020Channel Slope in12.0Diameter cfs0.04Discharge Results in0.7Normal Depth ft²0.0Flow Area ft0.5Wetted Perimeter in0.5Hydraulic Radius ft0.48Top Width in1.0Critical Depth %6.1Percent Full ft/ft0.006Critical Slope ft/s2.02Velocity ft0.06Velocity Head ft0.12Specific Energy 1.751Froude Number cfs5.87Maximum Discharge cfs5.46Discharge Full ft/ft0.000Slope Full SupercriticalFlow Type GVF Input Data in0.0Downstream Depth ft0.0Length 0Number Of Steps GVF Output Data in0.0Upstream Depth N/AProfile Description ft0.00Profile Headloss %0.0Average End Depth Over Rise %6.1Normal Depth Over Rise ft/sInfinityDownstream Velocity ft/sInfinityUpstream Velocity in0.7Normal Depth in1.0Critical Depth ft/ft0.020Channel Slope ft/ft0.006Critical Slope Page 1 of 127 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 9/26/2024 FlowMaster [10.03.00.03] Bentley Systems, Inc. Haestad Methods Solution CenterMayCreek.fm8 Worksheet for Circular Pipe - 6_7+22.19 Project Description Manning FormulaFriction Method Normal DepthSolve For Input Data 0.012Roughness Coefficient ft/ft0.020Channel Slope in12.0Diameter cfs0.04Discharge Results in0.7Normal Depth ft²0.0Flow Area ft0.5Wetted Perimeter in0.5Hydraulic Radius ft0.48Top Width in1.0Critical Depth %6.1Percent Full ft/ft0.006Critical Slope ft/s2.02Velocity ft0.06Velocity Head ft0.12Specific Energy 1.751Froude Number cfs5.87Maximum Discharge cfs5.46Discharge Full ft/ft0.000Slope Full SupercriticalFlow Type GVF Input Data in0.0Downstream Depth ft0.0Length 0Number Of Steps GVF Output Data in0.0Upstream Depth N/AProfile Description ft0.00Profile Headloss %0.0Average End Depth Over Rise %6.1Normal Depth Over Rise ft/sInfinityDownstream Velocity ft/sInfinityUpstream Velocity in0.7Normal Depth in1.0Critical Depth ft/ft0.020Channel Slope ft/ft0.006Critical Slope Page 1 of 127 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 9/26/2024 FlowMaster [10.03.00.03] Bentley Systems, Inc. Haestad Methods Solution CenterMayCreek.fm8 Worksheet for Circular Pipe - 7_0+60.00 Project Description Manning FormulaFriction Method Normal DepthSolve For Input Data 0.012Roughness Coefficient ft/ft0.020Channel Slope in12.0Diameter cfs0.01Discharge Results in0.4Normal Depth ft²0.0Flow Area ft0.4Wetted Perimeter in0.3Hydraulic Radius ft0.35Top Width in0.5Critical Depth %3.2Percent Full ft/ft0.007Critical Slope ft/s1.33Velocity ft0.03Velocity Head ft0.06Specific Energy 1.597Froude Number cfs5.87Maximum Discharge cfs5.46Discharge Full ft/ft0.000Slope Full SupercriticalFlow Type GVF Input Data in0.0Downstream Depth ft0.0Length 0Number Of Steps GVF Output Data in0.0Upstream Depth N/AProfile Description ft0.00Profile Headloss %0.0Average End Depth Over Rise %3.2Normal Depth Over Rise ft/sInfinityDownstream Velocity ft/sInfinityUpstream Velocity in0.4Normal Depth in0.5Critical Depth ft/ft0.020Channel Slope ft/ft0.007Critical Slope Page 1 of 127 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 9/30/2024 FlowMaster [10.03.00.03] Bentley Systems, Inc. Haestad Methods Solution CenterMayCreek.fm8 APPENDIX D SITE AND OFFSITE ANALYSIS PHOTOS 2,257376 Photo Key Map All data, information, and maps are provided "as is" without warranty or any representation of accuracy, timeliness of completeness. The burden for determining accuracy, completeness, timeliness, merchantability and fitness for or the appropriateness for use rests solely on the user. WGS_1984_Web_Mercator_Auxiliary_Sphere Notes None Legend 256 0 128 256 Feet Network Structures Public Access Riser Private Access Riser Public Inlet Private Inlet Public Manhole Private Manhole Public Utility Vault Private Utility Vault Public Clean Out Private Clean Out Public Unknown Private Unknown Pump Station Public Pump Station Private Pump Station Discharge Point Public Discharge Point Private Discharge Point Water Quality Public Water Quality Private Water Quality Detention Facilities Public Detention Facility Private Detention Facility Pipe Flow Direction Pipe Public Pipe Private Pipe Public Culvert Private Culvert Public Roofdrain Private Roofdrain Open Drains Virtual Drainline Facility Outline Fence Flow Control BMP Facility Transfer Inactive Structure Inactive Pipe Inactive Water Quality Inactive Detention Facilities Inactive Discharge Point Streets Points of Interest Parks Waterbodies 2021.sid Red: Band_1 Green: Band_2 Blue: Band_3 1 2 3 4 6 5 7 8 9 10 11 Photo 1: Green Erosion Mat seen along May Creek bank near Lake Washington Bridge Photo 2: Green Erosion Mat seen along May Creek bank near Lake Washington Bridge Photo 3: Drainage Area West side of Lake Washington Blvd and north of N 41st street Photo 4: Roadside ditch East side of Lake Washington Blvd (Looking Upstream) Photo 6: Offsite Drainage slope with thick vegetation Photo 5: Roadside ditch East side of Lake Washington Blvd (Looking Downstream) Photo 8: Existing offsite drainage inlets Photo 7: Drainage Area West side of Lake Washington Blvd and North of N 41st Street Photo 9: Offsite roadside ditch east side of Lake Washington Blvd (facing downstream) Photo 10: Offsite drainage culvert Photo 11: Drainage Area west of Lake Washington Blvd and south of N 41st street APPENDIX E CITY OF RENTON COORDINATION 1 Li, Jessica From:Jason Lederer <JLederer@rentonwa.gov> Sent:Monday, March 25, 2024 9:24 AM To:Michael Sippo; Nelson, Garth Cc:Li, Jessica; Culleiton, Connor Subject:RE: May Creek Trail South - Frontage Improvement Drainage Memo Follow Up Flag:Follow up Flag Status:Completed Hi Michael, Thanks so much, this is incredibly helpful! Your coordina on with Surface Water is very much appreciated. @Garth and team – I hope that with this informa on you have what you need to wrap up the 60%, however, please do not hesitate to let us know if other ques ons arise. Jason Jason Lederer Parks Planning Manager | City of Renton jlederer@rentonwa.gov | mobile: (206) 532-4562 | rentonwa.gov/ppnr From: Michael Sippo <MSippo@Rentonwa.gov> Sent: Monday, March 25, 2024 9:04 AM To: Jason Lederer <JLederer@rentonwa.gov> Cc: Garth Nelson (garth.nelson@wsp.com) <garth.nelson@wsp.com>; Li, Jessica <Jessica.Li@wsp.com>; Culleiton, Connor <Connor.Culleiton@wsp.com> Subject: RE: May Creek Trail South - Frontage Improvement Drainage Memo Good morning Jason, Regarding the applica on of the flow control standard I was able to coordinate with the Surface Water Department in Public Works for clarifica on because of the confusing language in the standard. Below is the response I received which, once applied, looks like the project will not have to detain. That being said, any onsite improvements will need to be factored into the calcula ons. “Back in September 2023 I encountered this inconsistency regarding the Flow Control Dura on Standard Matching Exis ng Site Condi ons Areas on page 1-43 of the 2022 RSWDM. Immediately aIerwards, I had noted it as an error to be corrected in the next RSWDM revision. 2 I agree that following this requirement as currently wriJen in the 2022 RSWDM is inconsistent with its actual intent. I believe the manual should be fixed as noted, thereby clarifying the 0.15 cfs exemp on for Flow Control Dura on Standard Matching Exis ng Site Condi ons Areas to be calculated as the difference between proposed and exis ng condi ons, rather than historical. Seeing as how only 1,469 SF of new impervious area is proposed, I imagine the project will prove exempt from flow control.” Thank you, MICHAEL S. SIPPO, Civil Engineer III City of Renton | CED | Development Engineering Division 1055 S Grady Way | 6th Floor | Renton, WA 98057 Virtual Permit Center | Online Applications and Inspections (425) 430-7298| msippo@rentonwa.gov From: Jason Lederer <JLederer@rentonwa.gov> Sent: Tuesday, March 19, 2024 4:28 PM To: Michael Sippo <MSippo@Rentonwa.gov> Cc: Garth Nelson (garth.nelson@wsp.com) <garth.nelson@wsp.com>; Li, Jessica <Jessica.Li@wsp.com>; Culleiton, Connor <Connor.Culleiton@wsp.com> Subject: RE: May Creek Trail South - Frontage Improvement Drainage Memo Importance: High Hi Michael, Thank you for this helpful follow-up. Do you have a recommenda on for the best next step or approach for resolving this ques on quickly? Please note that the broader context of the May Creek Riparian Enhancement and Trail Project is to improve overall May Creek riparian func on and ecological health, along with crea ng a soI surface passive recrea on trail. The frontage improvements being proposed, and are triggering this flow control ques on, are a requirement of the City’s Development Code and we have worked to meet the intent of that code requirement within the context of sensi ve adjacent natural areas. It’s a delicate balance, but we need to come to final resolu on on this ques on soon in order to move the broader forward. Thanks again for helping us navigate this process. Jason Jason Lederer Parks Planning Manager | City of Renton jlederer@rentonwa.gov | mobile: (206) 532-4562 | rentonwa.gov/ppnr APPENDIX F AS-BUILT DATA