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HomeMy WebLinkAbout4089-TIR - 1 - KP Development Short Plat 1825 NE 38th Street Technical INformation Report 6/12/2020 For: Mr. Cameron Damskov Damskov Construction, LLC 1940 124th Ave NE, Suite A107 Bellevue, WA 98005 By: Preferred Engineering, LLC 11627 SE 58th Street Bellevue, WA 98006 (206) 501−5708 DEVELOPMENT ENGINEERING jchavez 07/20/2020 SURFACE WATER UTILITY jfarah 07/30/2020 - 2 - Table of Contents TASK 1 THROUGH 5 IS THE PROJECT OVERVIEW AND LEVEL 1 OFF-SITE ANALYSIS Table of Contents .......................................................................................................................................... 2 TASK 1: DEFINING & MAPPING STUDY AREA: .............................................................................................. 4 TASK 2 : RESOURCE REVIEW ........................................................................................................................ 7 TASK 3: FIELD INSPECTION ......................................................................................................................... 12 TASK 4: DRAINAGE SYSTEM DESCRIPTION & PROBLEM DESCRIPTIONS .................................................... 13 Existing Drainage System Description: ................................................................................................ 13 Proposed Drainage System Description: ............................................................................................. 13 Upstream Analysis: ............................................................................................................................. 13 Core Requirement #1: Discharge at the Natural Location: ..................................................................... 20 Core Requirement #2: Offsite Analysis: .................................................................................................. 20 Core Requirement #3: Flow Control Facilities: ....................................................................................... 25 Core Requirement #4: Conveyance System ............................................................................................ 25 Core Requirement #5: Construction Stormwater Pollution Prevention ................................................. 25 Core Requirement #6: Maintenance and Operations............................................................................. 25 Core Requirement #7: Financial Guarantees and Liability...................................................................... 26 Core Requirement #8: Water Quality Facilities ...................................................................................... 26 Core Requirement #9: On-Site BMPs Analysis ........................................................................................ 26 Special Requirement #1: Other Adopted Area Specific Requirements ................................................. 28 Special Requirement #2: Flood Hazard Area Delineation ...................................................................... 28 Special Requirement #3: Flood Protection Facilities ............................................................................. 28 Special Requirement #4: Source Control ............................................................................................... 28 Special Requirement #5: Oil Control ...................................................................................................... 29 - 3 - Special Requirement #6: Aquifer Protection Area ................................................................................. 29 TASK 5: MITIGATION OF EXISTING OR POTENTIAL PROBLEMS .................................................................. 30 Projected Landuse Changes for Effective Impacted Areas ................................................................. 30 FLOW CONTROL & DETENTION WATER QUALITY APPENDIX .................................................................................................................................................... 33 CONVEYANCE CALCULATIONS & CB MAPPING DOWNSTREAM ANALYSIS MAPPING FLOW CONTROL CALCULATIONS (WWHM) BASIN DELINEATION MAPPING - 4 - The following report provides the Level 1 Downstream Analysis and FINAL Technical Information Report (hereafter referred to as the drainage report or TIR) required for short plat review, as well as additional discussion of the City of Renton Core and Special Requirement requirements. This drainage report is the full TIR to support the construction plans. The following report complies with the City of Renton Amendment to the King County Surface Water Design Manual effective January 1, 2017. This project proposes more than 2,000 square feet of new impervious surface and will result in more than 7,000 square feet or more of land disturbing activity and therefore is subject to the Full Drainage Review criteria and requires discussion of all nine core requirements in Section 1.1.2.4 and the six special requirements in Section 1.3. TASK 1: DEFINING & MAPPING STUDY AREA: The proposed KP Development 8 lot short plat is located generally west of Lincoln Avenue NE and south of NE 38th Street in parcel 334570-0220 in the north end of the City of Renton. (See Figure 1 map) The existing use of the 1.46 acre lot is as a single family residence with mostly grass cover, trees and blackberries. The proposed plat proposes to develop 8 single family lots within the R8 zone allowable land use area. The current zoning to the north , east, west and south boundaries are all R-8 zoning. Along the southwest property boundary is a SFH with it’s prior built access drive within the project boundary. This project proposes to fix this issue by submitting a concurrent lot line adjustment and keeping the existing access driveway. There are no creeks within the project and the southeast boundary project has just constructed it’s storm and utilities for their development. The boundary to the north has NE 38th Street on it’s boundary and on the other side are homes. The proposed development will construct a stormwater vault treating water quality and detention, roads, sidewalks, small house lots and try to retain the required trees required by the City of Renton codes. This drainage report will comply with the 2017City of Renton Surface Water Design Manual. Below are some researched mapping for the area that will assist with the storm design. - 5 - Figure 1: Vicinity Map Project Site - 6 - Figure 2: Aerial Map Project Site - 7 - TASK 2 : RESOURCE REVIEW Resources reviewed include use of Renton existing and potential flooding and erosion data, as builts and discussions with two neighboring property owners regarding proposed walls and the existing driveway. The following resource review includes any basin plans (basin reconnaissance summary reports), FEMA maps, sensitive areas folios, USDA sols reports, King County Soils Survey, wetland inventory maps, Renton erosion maps, Renton landslide maps, and any Washington State Department of Ecology’s latest Clean Water Act Section 303d list of polluted waters. • Basin Reconnaissance Summary Reports: There exists a downstream trail with an uphill ditch system that intercepts the runoff from the site. Ultimately, the Jones Avenue NE discharges to a culvert near the unimproved NE 40th Street system and under the I405 WSDOT – culvert of May Creek system. May Creek ultimately discharges into Lake Washington. • FEMA Maps: There exists no floodway or floodplain areas on the project site according to IMAP or FEMA Maps. • Renton Flow Control Application Map: The project site will be designed at minimum to the Flow Duration of Pre-Developed Rates for forested conditions from 50% of the 2 year to the full 50 –year flow and match forested site conditions for the 2 to the 10 year peaks, and match existing site conditions for the 100 year peak runoff. • Sensitive Areas Folios: o Coal Mine Hazard: The project is not within the City of Renton Coal Mine Hazard Area. o Steep Slope Areas: The project site has some steep slopes to the western portion of the site. See Figure 7. Steep slopes within the project disturbance area are not present. o Landslide Areas: The project is located within a mapped landslide hazard area. A more detailed analysis has been provided by the geotechnical engineer (see Geotech Report). - 8 - FIGURE 3: From COR Maps: Landslide Hazard Area o Seismic Hazard Areas: There exists no seismic hazard area within the project site, but nearby adjacent sites to the west has some seismic hazard areas near the creek. FIGURE 4: From COR Maps: Seismic Areas o Erosion Hazard Area: The project site is an erosion hazard area. - 9 - FIGURE 5: From COR Maps: Erosion Hazard Area o Wetland Areas: There is no SAO wetland in the project area. o Liquidification Area: See Geotechnical report. o Drainage Complaints: There have not been drainage complaints upstream of the project area or within the project area. Runoff primarily drains into the May creek system immediately downstream of the project site and within a ¼ mile of the project site. General Soils used for small site lot LID feasibility: The project site is primarily AgC or Alderwood gravelly sandy loam with up to 8 to 15 percent slopes, AgD, Alderwood gravelly sandy loam 15 to 20% slopes and AkF, Alderwood and Kitsap soils with very steep slopes according to the USDA – NRCS soils report. AgC soils typically have very low water capacities that are moderately well drained (about 2.5 inches) with very low to moderately low capacity of it’s most limiting layer to trasmit water. Typically a gravelly ashy sandy loam layer is present from 0 to 7 inches with very low ability to transmit water through the soil. The same is typical for the other two Alderwood type soils. (See soils report for a more site specific summary of the soils.) Based upon the soils information and report, runoff from the site during construction and post construction will not be very permeable. Therefore whole site infiltration facilities are not proposed for this project. - 10 - FIGURE 6: From US Web Soils Survey Mapping Project Site - 11 - FIGURE 7: From Rentonwa.gov: Existing critical areas-STEEP SLOPE AREAS FIGURE 8: Project Contour Map Project site Project Site - 12 - TASK 3: FIELD INSPECTION A field visit was conducted on August 2, 2018. The weather leading up to the visit was generally dry and no rains occurred that day. Temperature on August 2 was high 70s and low 80s in the afternoon. Soils on Lincoln Avenue NE were gravelly and dry. Onsite the underbrush provided shade and vegetation was healthy and green. There was no apparent upstream issues discharging onto the site and no indications of rills or erosion was evident in the street ditch system or from the construction uphill. The downstream ditch system adjacent to the trail did not show any type of negative erosion in the ditch. Slopes on the ditch were generally 2:1 to 1.25:1. We walked the path where it leveled off and discharged runoff, if ever there is heavy runoff, over the trail and spreading through the vegetation in a northwest direction. At the base of the hill is Jones Avenue NE ‘s storm ditch system that discharges west towards May Creek. Underbrush through the hillside prior to entering Jones Avenue NE is generally healthy and lush. Pockets of blackberries exist preventing safe traverse downhill. - 13 - TASK 4: DRAINAGE SYSTEM DESCRIPTION & PROBLEM DESCRIPTIONS Existing Drainage System Description: The existing drainage from the project site receives approximately 1.826 acres of upstream area from grass, the single family house and the new vault runoff with modeling as ‘fully forested’ for it’s pre- existing condition. Slopes vary from 18 percent to 3 percent closer to NE 36th Street. Lincoln Avenue NE, fronting the project site, currently drains downhill Lincoln Avenue NE without being diverted towards NE 38th Street. Any offsite from the street shall be maintained and the landuse is the same proposed as existing since the property uphill re asphalted the road fronting this project site. North of NE 38th Street there is a drainage catch basin allowing runoff to enter as a closed conveyance system and heads northward towards NE 44th Street. Proposed Drainage System Description: The proposed drainage system from the site shall not affect any offsite downstream system. The site shall divert any upstream runoff via direct connection to the proposed storm drainage along the N-S access road. Trees along the south west portion of the project will also be retained to allow the remaining pervious grass and trees from the up stream southwest area to disperse and percolate into the retained trees prior to sheet flow over to it’s current natural discharge location over towards the steep slope. The runoff from onsite shall retain it’s current flowpath and will not be diverted by this proposed development. The on-site storm management system proposes to utilize a reduced impervious surface per proposed lot and use compost amended soils along it’s yards. The onsite roads, roof runoff, sidewalks, grass and driveways will be collected into a new tight lined system and discharge into a combined dead and live volume vault. The runoff from the vault shall at minimum match up to the 100 year return event and be less than the historic land use full forested runoff. Upstream Analysis: (See section described under Core Requirement #2 later in this report.) - 14 - FIGURE 9: SOUTH VIEW ON LINCOLN AVENUE NE (LOOKING UPHILL AT THE NEW CURB/GUTTER-AUG 2018) - 15 - FIGURE 10: LOOKING NORTH ON LINCOLN AVENUE NE.. TOWARDS NE 38TH STREET INTERSECTION - 16 - FIGURE 11: LOOKING WEST ON NE 38TH STREET FROM THE INTERSECTION WITH LINCOLN AVE NE - 17 - FIGURE 12: ENTRANCE GATE (LOOKING WEST) TO WALKING TRAIL LEADING DOWN TO JONES AVENUE - 18 - FIGURE 13: SOUTHWEST TRAIL VIEW DOWNSTREAM (WALKING DOWNHILL) EVENTUALLY OUTLETS ONTO JONES ROAD. - 19 - FIGURE 14: DOWNSTREAM TRAIL HAS A LOW POINT HERE. 1’ TO 1.75’ DEEP DITCH WITH FLOW CURRENTLY PERCING INTO THE SOILS MOSTLY. WELL VEGETATED. NO SIGNS OF EROSION OVER THE TRAIL OR ON DOWNSTREAM SLOPE. NO SIGNS OF CHANNELIZED FLOW OVER THE SOFT TRAIL. - 20 - Core Requirement #1: Discharge at the Natural Location: The project discharges immediately downstream to the existing ditch system uphill of the access trail. All storm water runoff from the site will not be diverted from the NE 38th Street system and it’s natural discharge location downhill of the project site. Core Requirement #2: Offsite Analysis: An upstream and downstream analysis is provided in the following: Upstream Discussion: Contributing upstream runoff areas to the site are primarily from vegetated grassed, treed or sfh land use runoff from the south and via a discharged storm pipe/vault immediately uphill from the site. The slope of the upstream areas is generally medium sloped with 10 to 15% grades. Most of the potential offsite runoff is from this uphill vault discharge point which has been designed to the same flow duration runoff requirements as this project due to potential downstream flooding issues. US vault runoff from the Carpenter Short Plat (approximately 0.56 acres) is routed to the onsite storm system and flows through the proposed vault. Other upstream (south to southwest) areas are to be collected via a proposed shallow french drain system that is to be routed to the onsite western wall with it discharging into a proposed quarry spall rock pad situated just downstream of the proposed KP Development storm vault. This existing western ditch also currently receives runoff from onsite and is immediately downhill of the project limits. (See Figure 16 on page 24 for the ¼ mile level 1 downstream analysis map.) The upstream basin divide is west of NE 36th Street (west of Lincoln Ave NE) with a storm capture MH just south of 3601 Lincoln Avenue NE (parcel 3345700230). All upstream runoff, west of Lincoln Avenue NE, is primarily drained to this storm drainage structure and discharges downhill towards Jones Avenue NE. Downstream Discussion: The downstream analysis includes discharge westward via sheet flow and into the trail ditch system located immediately to the west of the project parcel. A low point in the trail mostly percs into the soils and sheet flows downhill in a westerly direction off the trail. During very intense and long rainfall events there is a possibility that runoff may sheet flow over the trail or continue down hill in a southwesterly direction. Ultimately both discharge locations are in the same basin in less than ¼ mile downstream. At the base of Jones Avenue NE runoff flows north to a low spot - 21 - approximately 800 feet north and then westward into May Creek and through the I405 May Creek bridge. The study area aerial map (see Figure 2, page 5) is provided to better illustrate the route. A ¼ mile downstream analysis flow direction and basin boundary limits figure is also provided in the appendix. Data was primarily collected from a qualitative walk and the CorMaps GIS mapping system. The following sections (Core Requirement #3 and #8) will further evaluate and analyze the full drainage review with a final engineering TIR submittal to be provided during the final engineering/construction document submittals. This preliminary analysis has determined that this plat, according to the 2017 City of Renton Surface Water Design Manual Amendment to the 2016 King County Surface Water Design Manual, shall treat for the new PGIS, grass and clean impervious areas with designs implementing what is recommended by the geotechnical engineer. - 22 - TABLE 1 ¼ Mile Downstream Qualitative Analysis ID STRUCTURE TYPE CONDITION NOTES, Slopes, Sizes Distance D.S. 1 Grassed trail side ditch on the south east side (uphill) of soft trail OK structurally, ditches have vegetation in it. Good condition. No signs of erosion in the ditch. Varies 1-ft deep to 1.5 ft. Approximately 5% to 1.0% slope. 0 to 307 ft. 2 The ditch has a low point at 307 feet downstream of the project discharge point ‘start’. The ditch does not appear to have a culvert that crosses the trail and apparently just ponds up until overflow over the trail. OK 0% slope at this location for approximately 60’ width and ponds or discharges over the trail. Trail path acts like a level spreader in this location and sheet-flows downhill. No indications downhill of any erosion issues with well grown vegetation. This runoff would occur only during a very high and long duration rainfall event. 307 feet DS 3 Sheet flow for approximately 250 feet OK, vegetation present. No apparent erosive rills or ditches. Slope is steep in the beginning of the sheet flow at steeper than 1:1 and leveling out near Jones Avenue NE. 557 feet DS 4 Wide roadside ditch along east side of Jones Avenue NE Mild grade ditch Slope downstream along Jones Avenue NE is approximately 1% or less and has potential for wetland plants on parcel 3345700120. Cannot see base of Jone’s Avenue NE east side ditch due to blackberries. Per COR Maps, the wetland area downstream at just past 1700 ft downstream of discharge pt appears to be a wetland area. (See figure 16) This is along the east of Jones Avenue NE. on parcel 3345700120. 1327 feet DS of discharge point. - 23 - • Note: for ID #2 and #3 above a possible mitigation measure may be to install a mid height culvert in the ditch to discharge further down the ditch (see Figure 15 on next page for location of pond / natural level spreader and potential mitigation area. FIGURE 15: Existing Trail with pond upstream and Potential Mitigation culvert w/ CB. - 24 - FIGURE 16: Downstream pathway for at least ¼ mile of discharge location. - 25 - Core Requirement #3: Flow Control Facilities: This project proposes a flow control live volume vault to hold and control runoff from the proposed landuse site changes. Per discussions with the City of Renton Development Services reviewer and per the COR Flow Control Application Map, the project will be designed utilizing the Flood Problem Flow Control Standard which essentially provides flow control for durational matching to forested (historical) conditions for half of the 2 year through the 50 year flows along with at minimum matching forested site conditions for the 2 and 10 year peaks and matching at least the existing site conditions for the 100 year peak runoff. The resultant discharge out of the proposed vault complies with the above requirements. (See proposed 2 year to 100 year return event peak discharges that are less than the existing forested conditions (therefore more conservative)). The site and downstream flow path has a type 2 drainage problem (erosion) within a ¼ mile of the discharge location and has steep slope issues. Please note regardless of the flow control facility specified for this project, the Core Requirement #9 shall identify and provide on-site BMPs applied to the project site. (See Task 5 and Appendix sections of this report for existing and proposed land use, calculations and preliminary/achievable design information related to the proposed stormwater vault and LID BMPs.) Core Requirement #4: Conveyance System This project has analyzed, designed and proposes to construct the minimum level of protection necessary against overtopping, flooding, erosion and structural failure for the new storm conveyance system. The system shall be piped and will fully contain the 25 year peak flow for the developed conditions for onsite tributary areas and existing conditions for offsite tributary areas. Any overtopping onsite will not be allowed to aggravate any erosion or steep slope hazards. The potential ditch overtopping that likely currently occurs downstream on the trail ditch system will propose a new storm drainage bypass to remedy the existing issue also. This storm water report submittal provides for calculations within the appendix section. Core Requirement #5: Construction Stormwater Pollution Prevention The project has provided proposed sediment and erosion controls to the maximum extent practical to prevent transporting sediment from the site to downstream and/or adjacent parcels. A final construction SWPP plan is included with this project and a WAR permit with the State has been applied for by the project. Core Requirement #6: Maintenance and Operations The project has designed the combined water quality and detention vault to City requirements since runoff from ROW streets shall drain to the vault. The combined storm water vault facility has been - 26 - designed to be maintained from above ground access points via a grated opening and manhole ladders. Other O&M components are included within the project O&M manual including the downstream ditch lining specifications and inspection frequency. Core Requirement #7: Financial Guarantees and Liability A maintenance bond, assignment of funds or certified check shall be posted for 2 years. The maintenance bond shall be 20 % of the amount calculated in the bond quantities worksheet to be reviewed and accepted by the City during the final engineering construction drawings phase. Core Requirement #8: Water Quality Facilities The project shall design and construct a basic water quality treatment protection for the site since it is only a residential plat development and is not within an aquifer protection area per the City of Renton Cor maps data. The facility shall be sized and will treat the entire proposed pollution generating impervious surfaces from the site (PGIS). The project proposes more than 5,000 sq-ft of PGIS and is not exempt from water quality treatment. See Section 5 of this report and the appendix for water quality calculations and volumetric requirements for this project. Core Requirement #9: On-Site BMPs Analysis Core requirement #9 is required since the project is not designing an infiltration facility for flow control facility code compliance, nor can it be done on this site, and the project is over 2,000 sq-ft of new plus replaced impervious surface to be created. Based upon the 2017 City of Renton Surface Water Design Manual, section 1.2.9 (specifically section 1.2.9.3), on site small sub-division BMPs will be applied as detailed on Appendix C, Section C.2.1 with impervious surfaces evaluated through various dispersion, infiltration and other possible BMPs: • Full Dispersion: Not capable due to lack of land for each lot and the requirement to level out the lots and roads for most of the site. The use of one or two splash blocks may be possible if there is a flow-path of 50-ft or more downstream. Also the presence of erosion and steep slopes to the west prevents even more use of the splash blocks. Rock pads also are prohibitive due to the long length of downstream flow-path required. The simple 10-ft trench is also not possible due to the non-infiltrating nature of the underlying soils (as also not-recommended by the Geotech report). If this BMP was implemented, then water would just pond underneath within the rock voids. The same issue exists for the sheet flow option due to the lack of downstream flow-path, steep slopes and lack of native vegetation downstream possible for this development. None of the Table C.2.1.A BMPs and flow-paths are possible for this development and each lot. - 27 - • Full Infiltration: Per the recommendations provided by the geotechnical engineer, whereby they determined infiltration is not feasible for the site, this project will not be able to use full infiltration to comply with the onsite storm water BMP requirement. The site cannot fully and reliably infiltrate. The geotechnical evaluation and approval requirement is not met for full infiltration and not recommended for this project site per the steep slopes and erosion hazards of the project site. The project site essentially has shallow depth of topsoil before encountering glacial till. • Limited Infiltration: Per the recommendations provided by the geotechnical engineer, whereby they determined infiltration is not feasible for the site, this project will not be able to use limited infiltration to comply with the onsite stormwater BMP requirement either. Soils are better suited for limited infiltration, but still not optimal due to steper slopes and lack of proper setbacks available for each lot. Gravel filled trenches requirements are required to be too large if utilized on each lot and given the lack of space for this type of facility, it is not feasible. In addition, the use of drywells is similarly problematic since the depth of available sandy loams is also limited. • Basic Dispersion: Basic sheet flow is not possible since there lacks proper setbacks after fitting any potential vegetated strip, buildings or street/access areas. • Farmland Dispersion: N/A in Renton • Bio-retention: Lack of available area exists for the use of this BMP since this project would discharge on adjacent slopes greater than 15% and also is in an erosion hazard area. Finally if this BMP was used, the areas would have transportation safety issues since families may end up in these vegetated depressions with required roadway setbacks. Lack of proper non- glacial soils are also not present for this site. • Permeable Pavement: Difficult for this project site due to presence of trees overhead and also the steeper slopes present onsite. • Rainwater Harvesting: Use of a couple cisterns per house may be possible for this project, but will need an overflow onto pervious grass areas or prior to discharging overflow into a nearby catchment. The 10% of the impervious lot area will be difficult to achieve due to limited tank space for the large cistern. • Reduced Impervious Surface Credit: Is applied for this project and written into the drainage plan notes for each lot. The allowable impervious cover for each lot is 75% for this zoning. The 10% reduction for the lot is provided and all lots must be less than 65% impervious cover. (See construction Storm Drainage Plan notes.) • Native Growth Retention Credit: The native growth retention credit is not used for this site even though native growth along the steep slope is required to be kept ‘native’. - 28 - • Perforated Pipe Connection: This BMP is not recommended by the geotech for this project. • Rain Gardens: Not applicable due to space/area infeasibility and issues with non-percolating soils. • Soil Amendment: Possible to be amended with front yard areas that may discharge to the roadway drainage. • Tree Retention Credit: Tree retention is proposed for this site with trees along the south and west property line being saved and areas to be included in a LLA. • Vegetated Roofs: Financially not viable for this small development. REDUCED IMPERVIOUS SURFACE CREDIT SELECTED TO BE APPLIED FOR THIS SHORT PLAT. Special Requirement #1: Other Adopted Area Specific Requirements The proposed project’s drainage basin is within the Lake Washington WRIA 8 – Cedar Sammamish Watershed that contains Lake Washington also. The City of Renton has adopted the WRIA 8 within it’s Ordinance for protection Salmon and other wildlife draining to Lake Washington. Any and all endangered species must comply with the WRIA 8 plan for this basin, which this project is within. The project is located upstream of the May Creek Basin and is subject to the City of Renton’s May Creek Basin Plan area. Special Requirement #2: Flood Hazard Area Delineation There exists no flood hazards within the project area or immediately downstream of this discharge location. There is a mapped wetlands east of the Jones Avenue area that this project drains towards. The runoff planned to be discharged to this site will not affect the wetland hydrology. Special Requirement #3: Flood Protection Facilities There exists no known flood protection facilities in this area, upstream, or downstream. Special Requirement #4: Source Control This project shall not contain any stored materials which may contaminate the land and runoff that may infiltrate into the aquifer. No short or long term gasing trucks, containers, or other flammable or toxic chemicals will be stored on-site without proper containment methodologies. - 29 - Special Requirement #5: Oil Control Oil control is not necessary for this development since traffic through the intersection of SE 2nd Place and Duvall Avenue SE does not exceed 1,000 ADT or more. Special Requirement #6: Aquifer Protection Area The proposed project is not in Renton’s Aquifer Protection Mapping. The drainage plans will conform to Ordinance 4367 and Ordinance 4851. - 30 - TASK 5: MITIGATION OF EXISTING OR POTENTIAL PROBLEMS The following is the proposed landuse for the project and inputted within the WWHM modeling calculations. Projected Landuse Changes for Effective Impacted Areas: Existing Landuse (currently SFH with driveways, but will be modeled as fully forested) = 58,063.5 sq-ft (1.333 acres). Runoff from Lincoln currently is a separate discharge area and proposed improvements include sawcut to install the vertical curb and gutter. This runoff will continue to discharge down Lincoln Avenue NE. No mitigation is necessary since current and proposed runoff along Lincoln Avenue NE is the same. Proposed Landuse Totals = 1.333 acres (See appendix for Basin Map) Pollution Generating Impervious Areas = 16,346 sq-ft (0.3753 acres) Proposed Building Areas = 13,060 sq-ft (0.3044 acres) Sidewalks (in street areas) = 1,722 sq-ft (0.0395 acres) Sidewalks (private lots) = 729.6 sq-ft (0.0167 acres) Grass = 26,005.9 sq-ft (0.5970 acres) Note the upstream basin (24,395 sq-ft or 0.56 acre per information provided by the Carpenter short plat) is modeled as pervious lateral runoff that discharges from the existing upstream vault and will be intercepted by the proposed NE 38th short plat (also called the KP Development short plat) storm conveyance system. The upstream vault modeled the runoff as fully forested for the 0.56 acre project basin. Upstream of the Carpenter short plat a French drain trench was constructed that discharged to a splash pad. The above proposed landuse areas includes the existing NE 38th Street roadway sub-base that will be re-graded, the proposed Lincoln Avenue NE sidewalk and landscaping, and the onsite areas affected by grading for walls, houses and roads. Also note that most of Lincoln Avenue NE street drainage (asphalt) is a separate drainage basin that flows downhill Lincoln. - 31 - The proposed combined water quality and detention vault shall mitigate for fully forested conditions for ½ of the 2yr to the 50yr durations with equal to or less than the 2yr and 10 yr forested peaks runoff rates and equal to or less than the existing conditions 100 yr flow rate. The ‘current’ conditions amount of runoff from the site computations are provided for in the appendix for the currently occupied single family house, impervious driveways, treed areas and grassy areas. The project is not proposing any type of infiltration or dispersion structure due to recommendations of the geotechnical engineer. The geotech recommended not even using a perforated pipe connection for the site. The analysis of the onsite BMPs for flow control exemption compliance, per the 2017 Renton Surface Water Design Manual, is provided in Core Requirement #9 (see pg 26). The proposed roofs will need to connect directly into the proposed combined water quality and detention vault per the geotech recommendation. The project will use the reduced impervious area per lot to comply with the onsite low impact storm BMPs requirement. Potential temporary problems may occur if the site is left opened and temporary runoff not contolled during heavy storm events so erosion and sediment control BMPs must be used during construction if continuous rainfall is expected or the site is left unattended for long durations. A temporary erosion and sedimentation control plan has been created to minimize transport of sediment laden runoff to the downstream system (also see SWPPP for descriptions and calculations). During construction the use of stabilized entrances, CB inserts to protect downstream inlets and slope/soils erosion BMPs (silt fence, seeding, straw waddles, check dams, plastic covering on stockpiles, etc.) will be utilized to reduce impacts to the downstream storm system and adjacent properties. The following retention volume must be provided at minimum to comply with the basin’s flow control requirement: Live volume required (see appendix for WWHM calculations) = 18,106 cubic feet (includes 1-ft freeboard) Provided volume with E-W vault section 22-ft wide x 59 ft long = 12,980 cubic feet Provided volume with N-S vault section 21-ft wide x 26 ft long = 5,460 cubic feet FLOW CONTROL MITIGATION The proposed detention vault was modeled using WWHM2012 and with an 3 orifice outlet flow control structure. The structure was modeled with a width of 22 feet and 83 feet long with a depth of 10 feet including freeboard. The required volume needed in the vault is 18,106 Cubic-feet. The designed volume provided is 18,440 cubic-feet (see Appendix for WWHM calculations and basin map). Note that - 32 - runoff along Lincoln Avenue NE does not get affected with any new impervious runoff. No new asphalt is needed along Lincoln Avenue NE. Lincoln Avenue NE improvement will need a new vertical curb and gutter only. The new sidewalk and landscape strip will continue to discharge towards the proposed vault. WATER QUALITY CALCULATIONS: The following is the minimum required water quality size required for the project. The minimum required wetpool volume (dead storage) is 4,137 sq-ft. This volume is larger and more conservative than using the resulting water quality results from WWHM2012 modeling. Use of the KC wetpool analysis method to determine the volume is more conservation and used for this project. - 33 - Wetvault Facility Design 38th Street Short Plat Date: 7-Oct-19 Wetpool Analysis for Water Quality Treatment: Step 1.) Determine Volume Factor, f. Basin size f = 3 Consult WQ requirements (Section 1.2.8) Step 2.) Determine rainfall R for mean annual storm Rainfall (R) 0.039 (feet), Req'd from Figure 6.4.1.A, page 6-71 Step 3.) Calculate runoff from mean annual storm Vr = (0.9Ai + 0.25 Atg +0.10 Atf + 0.01 Aog) x R A i = tributary area of impervious surface 32,058 (sf) Determine Now Atg = tributary area of till grass 26,006 (sf) Determine Now Atf = tributary area of till forest 0 (sf) Determine Now Aog = tributary area of outwash grass (sf) Determine Now R = rainfall from mean annual storm (ft) Determine Now Vr = volume of runoff from mean annual storm 1,378.78 (cf) From Step 2 Step 4.) Calculate water quality volume required based on Wetpool methodology Vb = fVr f = Volume factor 3 unitless From Step 1 Vr = Volume of runoff, mean annual storm 1,378.78 (cf) From Step 3 Vb = Volume of wetvault req. for wq treatment 4,136.34 (cf) TABLE 2: WATER QUALITY CALCULATION - 34 - APPENDIX • CONVEYANCE AND BACKWATER CALCULATIONS (25 YR AND 100 YR) • CB BASIN MAP • UPSTREAM AREA MAP • DOWNSTREAM MAP • DETENTION CALCULATIONS (WWHM 2012) - EXISTING FORESTED W/ PROPOSED MITIGATED - EXISTING 100 YEAR PEAK RUNOFF CALCULATION - VAULT BASIN MAPPING - 35 - • CONVEYANCE AND BACKWATER The following is the conveyance and backwater information for the proposed pipe and catchment locations for 38th Street Short Plat. Information includes catchment areas into each catch basin or manhole inlet. The resulting 25 year return rational method conveyance and backwater analysis is all contained within the conveyance system. CONVEYANCE CALCULATIONS BACKUP DATA TABLE: FOR TC CALCS FOR TC CALCS SUB BASIN CB SUB AREA (SF) X COORD Y COORD GRASS (DIST, LF) ASPHALT OR BLDG (DIST, LF) CB 7 810 1304055.32 194499.42 25 5 CB 6 10,707 1304131.51 194497.52 105 10 CB 5 4,958 1304134.53 194580.87 72 0 CB 4 19,882 1304211.04 194510.45 99 54 CB 3 2,040 1304216.42 164641.73 0 123 CB 2 11,209 1304213.12 194582.05 82 61 CB 1 4,836 1304186.46 194587.06 80 0 EX CB 4,067 Existing CB location drains into vault from upstream NE 38th runoff. 1.34 acres - 33 - Wetvault Facility Design 38th Street Short Plat Date: 7-Oct-19 Wetpool Analysis for Water Quality Treatment: Step 1.) Determine Volume Factor, f. Basin size f = 3 Consult WQ requirements (Section 1.2.8) Step 2.) Determine rainfall R for mean annual storm Rainfall (R) 0.039 (feet), Req'd from Figure 6.4.1.A, page 6-71 Step 3.) Calculate runoff from mean annual storm Vr = (0.9Ai + 0.25 Atg +0.10 Atf + 0.01 Aog) x R A i = tributary area of impervious surface 32,058 (sf) Determine Now Atg = tributary area of till grass 26,006 (sf) Determine Now Atf = tributary area of till forest 0 (sf) Determine Now Aog = tributary area of outwash grass (sf) Determine Now R = rainfall from mean annual storm (ft) Determine Now Vr = volume of runoff from mean annual storm 1,378.78 (cf) From Step 2 Step 4.) Calculate water quality volume required based on Wetpool methodology Vb = fVr f = Volume factor 3 unitless From Step 1 Vr = Volume of runoff, mean annual storm 1,378.78 (cf) From Step 3 Vb = Volume of wetvault req. for wq treatment 4,136.34 (cf) TABLE 2: WATER QUALITY CALCULATION - 34 - APPENDIX • CONVEYANCE AND BACKWATER CALCULATIONS (25 YR AND 100 YR) • CB BASIN MAP • UPSTREAM AREA MAP • DOWNSTREAM MAP • DETENTION CALCULATIONS (WWHM 2012) - EXISTING FORESTED W/ PROPOSED MITIGATED - EXISTING 100 YEAR PEAK RUNOFF CALCULATION - VAULT BASIN MAPPING - 35 - • CONVEYANCE AND BACKWATER The following is the conveyance and backwater information for the proposed pipe and catchment locations for 38th Street Short Plat. Information includes catchment areas into each catch basin or manhole inlet. The resulting 25 year return rational method conveyance and backwater analysis is all contained within the conveyance system. CONVEYANCE CALCULATIONS BACKUP DATA TABLE: FOR TC CALCS FOR TC CALCS SUB BASIN CB SUB AREA (SF) X COORD Y COORD GRASS (DIST, LF) ASPHALT OR BLDG (DIST, LF) CB 7 810 1304055.32 194499.42 25 5 CB 6 10,707 1304131.51 194497.52 105 10 CB 5 4,958 1304134.53 194580.87 72 0 CB 4 19,882 1304211.04 194510.45 99 54 CB 3 2,040 1304216.42 164641.73 0 123 CB 2 11,209 1304213.12 194582.05 82 61 CB 1 4,836 1304186.46 194587.06 80 0 EX CB 4,067 Existing CB location drains into vault from upstream NE 38th runoff. 1.34 acres CB DRAINAGE SUB-BASINS: Drainage Area Id: BSNCB1 Description.....: SUB BASIN CB1 <---Description--> SubArea SubC L (ft) Slope -Kr-- (min) BLDG 0.04 0.95 40.00 0.1500 20.00 0.09 ROAD 0.01 0.95 61.00 0.0500 20.00 0.23 LNSC 0.05 0.35 80.00 0.0700 7.00 0.72 SW 0.01 0.90 5.00 0.0200 20.00 0.03 Composite "c" Value........0.67 Time of Conc (min).. 1.06 Drainage Area Id: BSNCB2 Description.....: SUB BASIN CB2 <---Description--> SubArea SubC L (ft) Slope -Kr-- (min) BLDG 0.03 0.95 40.00 0.1500 20.00 0.09 ROAD 0.08 0.95 61.00 0.1100 20.00 0.15 LNSC 0.13 0.35 82.00 0.0700 7.00 0.74 SW 0.02 0.90 5.00 0.0200 20.00 0.03 Composite "c" Value........0.65 Time of Conc (min).. 1.01 Drainage Area Id: BSNCB3 Description.....: SUB BASIN CB3 <---Description--> SubArea SubC L (ft) Slope -Kr-- (min) LNDSC 0.01 0.35 10.00 0.2500 7.00 0.05 ROAD 0.04 0.95 54.00 0.1100 20.00 0.14 Composite "c" Value........0.83 Time of Conc (min).. 5.00 Drainage Area Id: BSNCB4 Description.....: SUB BASIN CB4 <---Description--> SubArea SubC L (ft) Slope -Kr-- (min) BLDG 0.11 0.95 40.00 0.1500 20.00 0.09 ROAD 0.12 0.95 54.00 0.1100 20.00 0.14 LNSC 0.19 0.35 99.00 0.0700 7.00 0.89 SW 0.03 0.90 5.00 0.0200 20.00 0.03 Composite "c" Value........0.69 Time of Conc (min).. 1.14 Drainage Area Id: BSNCB5 Description.....: SUB BASIN CB5 <---Description--> SubArea SubC L (ft) Slope -Kr-- (min) BLDG 0.04 0.95 40.00 0.1500 20.00 0.09 ROAD 0.01 0.95 10.00 0.1000 20.00 0.03 LNSC 0.05 0.35 72.00 0.0700 7.00 0.65 SW 0.01 0.90 5.00 0.0200 20.00 0.03 Composite "c" Value........0.67 Time of Conc (min).. 0.79 Drainage Area Id: BSNCB6 Description.....: SUB BASIN CB6 <---Description--> SubArea SubC L (ft) Slope -Kr-- (min) BLDG 0.08 0.95 40.00 0.1500 20.00 0.09 ROAD 0.06 0.95 10.00 0.1000 20.00 0.03 LNSC 0.10 0.35 105.00 0.0700 7.00 0.94 Composite "c" Value........0.70 Time of Conc (min).. 1.06 10/13/19 9:12:16 pm page 1 KP DEVELOPMENT NE 38TH SP 25 YR CONVEYANCE/BACKWATER ANALYSIS ===================================================================== RATIONAL DRAINAGE AREA SUMMARY Drainage Area Id: BSNCB7 Description.....: SUB BASIN CB 7 <---Description--> SubArea SubC L (ft) Slope -Kr-- (min) LNDSC 0.01 0.35 25.00 0.0700 7.00 0.22 SW 0.01 0.95 5.00 0.0200 20.00 0.03 Composite "c" Value........0.65 Time of Conc (min).. 0.25 10/13/19 9:12:16 pm page 2 KP DEVELOPMENT NE 38TH SP 25 YR CONVEYANCE/BACKWATER ANALYSIS ===================================================================== REACH SUMMARY Hydraulic Gradeline for Reach HYD1 <-FROM-> <--TO--> <FLOW> floss Ent_HGL EntLoss ExtLoss OutLet Inlet AppHead BndHead JunHead HeadWtr -cb/mh- -------- -------- cfs -loss- -Elev-- --loss- --loss- --Elev- --Elev- --loss- --loss- --loss- --Elev- --Rim-- =============================================================================================================== MH1 136.32 MH2 MH1 1.75 0.20 tw & dn <dc: Inlet Ctrl Assumed 136.37 0.04 0.06 0.01 136.40 144.90 CB3 MH2 1.30 0.59 tw & dn <dc: Inlet Ctrl Assumed 137.78 0.00 0.00 0.00 137.78 140.20 CB4 MH2 0.84 0.03 tw & dn <dc: Inlet Ctrl Assumed 149.93 0.00 0.00 0.00 149.93 153.80 INLET1 124.79 MH1 INLET1 2.64 0.10 tw & dn <dc: Inlet Ctrl Assumed 125.01 0.00 0.00 0.00 125.01 142.30 CB5 MH1 0.69 0.39 tw & dn <dc: Inlet Ctrl Assumed 138.31 0.01 0.01 0.00 138.31 142.00 MH6 CB5 0.49 1.00 tw & dn <dc: Inlet Ctrl Assumed 139.29 0.00 0.00 0.00 139.29 150.10 CB7 MH6 0.04 0.02 tw & dn <dc: Inlet Ctrl Assumed 139.85 0.00 0.00 0.00 139.85 142.20 Network Reach NET1 REACH <-AREA> <-DIA> LENGTH SLOPE < n > DSGN Q % PIPE Ndepth %Depth Vact Vfull C_Area ID (Ac) (ft) (ft) ft/ft ------ (cfs) ------ (ft) ------ (fps) (fps) ================================================================================================= P7 0.02 1.00 76.21 0.0094 0.0120 0.04 0.87 0.07 6.84 1.50 5.29 BSNCB7 P6 0.26 1.00 83.34 0.0120 0.0120 0.49 10.72 0.23 22.93 3.60 5.96 BSNCB6 P5 0.37 1.00 52.30 0.0445 0.0120 0.69 7.84 0.20 19.63 6.33 11.48 BSNCB5 Confluence with Network NET2 P1 1.45 1.00 5.00 0.0200 0.0120 2.64 44.81 0.49 48.93 6.90 7.69 BSNCB1 Network Reach NET2 REACH <-AREA> <-DIA> LENGTH SLOPE < n > DSGN Q % PIPE Ndepth %Depth Vact Vfull C_Area ID (Ac) (ft) (ft) ft/ft ------ (cfs) ------ (ft) ------ (fps) (fps) ================================================================================================= P4 0.45 1.00 71.63 0.1927 0.0120 0.84 4.61 0.15 15.15 11.24 23.88 BSNCB4 P3 0.71 1.00 59.77 0.0251 0.0120 1.30 19.65 0.31 31.21 6.19 8.62 BSNCB2 P2 0.97 1.00 27.13 0.0074 0.0120 1.75 48.94 0.52 51.56 4.29 4.67 BSNCB2 PIPE REACH ID No. P1 From: MH1 To: INLET1 Pipe Diameter: 1.0000 ft n: 0.0120 Pipe Length : 5.0000 ft s: 0.0200 Up invert : 124.4000 ft down invert: 124.3000 ft Collection Area: 1.4500 Ac. Design Flow : 2.6379 cfs Dsgn Depth: 0.49 ft Pipe Capacity : 5.8875 cfs Design Vel : 6.9046 fps Travel Time: 0.01 min Pipe Full Vel : 7.6932 fps 10/13/19 9:12:16 pm page 3 KP DEVELOPMENT NE 38TH SP 25 YR CONVEYANCE/BACKWATER ANALYSIS ===================================================================== REACH SUMMARY PIPE REACH ID No. P2 From: MH2 To: MH1 Pipe Diameter: 1.0000 ft n: 0.0120 Pipe Length : 27.1267 ft s: 0.0074 Up invert : 136.0000 ft down invert: 135.8000 ft Collection Area: 0.9700 Ac. Design Flow : 1.7496 cfs Dsgn Depth: 0.52 ft Pipe Capacity : 3.5746 cfs Design Vel : 4.2855 fps Travel Time: 0.11 min Pipe Full Vel : 4.6710 fps PIPE REACH ID No. P3 From: CB3 To: MH2 Pipe Diameter: 1.0000 ft n: 0.0120 Pipe Length : 59.7712 ft s: 0.0251 Up invert : 137.5000 ft down invert: 136.0000 ft Collection Area: 0.7100 Ac. Design Flow : 1.2960 cfs Dsgn Depth: 0.31 ft Pipe Capacity : 6.5950 cfs Design Vel : 6.1908 fps Travel Time: 0.16 min Pipe Full Vel : 8.6177 fps PIPE REACH ID No. P4 From: CB4 To: MH2 Pipe Diameter: 1.0000 ft n: 0.0120 Pipe Length : 71.6302 ft s: 0.1927 Up invert : 149.8000 ft down invert: 136.0000 ft Collection Area: 0.4500 Ac. Design Flow : 0.8424 cfs Dsgn Depth: 0.15 ft Pipe Capacity : 18.2729 cfs Design Vel : 11.2399 fps Travel Time: 0.11 min Pipe Full Vel : 23.8771 fps PIPE REACH ID No. P5 From: CB5 To: MH1 Pipe Diameter: 1.0000 ft n: 0.0120 Pipe Length : 52.3048 ft s: 0.0445 Up invert : 138.1300 ft down invert: 135.8000 ft Collection Area: 0.3700 Ac. Design Flow : 0.6885 cfs Dsgn Depth: 0.20 ft Pipe Capacity : 8.7866 cfs Design Vel : 6.3251 fps Travel Time: 0.14 min Pipe Full Vel : 11.4815 fps 10/13/19 9:12:16 pm page 4 KP DEVELOPMENT NE 38TH SP 25 YR CONVEYANCE/BACKWATER ANALYSIS ===================================================================== REACH SUMMARY PIPE REACH ID No. P6 From: MH6 To: CB5 Pipe Diameter: 1.0000 ft n: 0.0120 Pipe Length : 83.3447 ft s: 0.0120 Up invert : 139.1300 ft down invert: 138.1300 ft Collection Area: 0.2600 Ac. Design Flow : 0.4887 cfs Dsgn Depth: 0.23 ft Pipe Capacity : 4.5601 cfs Design Vel : 3.5973 fps Travel Time: 0.39 min Pipe Full Vel : 5.9587 fps PIPE REACH ID No. P7 From: CB7 To: MH6 Pipe Diameter: 1.0000 ft n: 0.0120 Pipe Length : 76.2137 ft s: 0.0094 Up invert : 139.8500 ft down invert: 139.1300 ft Collection Area: 0.0200 Ac. Design Flow : 0.0351 cfs Dsgn Depth: 0.07 ft Pipe Capacity : 4.0464 cfs Design Vel : 1.5028 fps Travel Time: 0.85 min Pipe Full Vel : 5.2874 fps 10/13/19 9:12:16 pm page 5 KP DEVELOPMENT NE 38TH SP 25 YR CONVEYANCE/BACKWATER ANALYSIS ===================================================================== STRUCTURE REPORT PROPOSED STRUCTURE REACH ID No. CB3 Location : CB 3 North : 194641.7300 Str Type : TYPE_1 East : 1304216.4200 Str Cat : Catch Basin Rim Elev : 140.2000 Area/sump: 0.00 sf/1.50 ft Bottom El: 136.0000 Cont Area: BSNCB2 Hgrade El: 137.7785 ft Bend.....: No special shape Ent type.: Area/sump: Ent Loss: 0.008 Exit: 0.042 App Vel: 0.000 Junct: 0.000 Bend: 0.000 Reach <Invert> <Diam> < n > <End> P3 137.500 12.00 0.012 Upper PROPOSED STRUCTURE REACH ID No. CB4 Location : CB 4 North : 194510.4500 Str Type : TYPE_1 East : 1304211.0400 Str Cat : Catch Basin Rim Elev : 153.8000 Area/sump: 0.00 sf/1.50 ft Bottom El: 148.3000 Cont Area: BSNCB4 Hgrade El: 149.9257 ft Bend.....: No special shape Ent type.: Area/sump: Ent Loss: 0.004 Exit: 0.018 App Vel: 0.000 Junct: 0.000 Bend: 0.000 Reach <Invert> <Diam> < n > <End> P4 149.800 12.00 0.012 Upper PROPOSED STRUCTURE REACH ID No. CB5 Location : CB 5 North : 194580.8100 Str Type : TYPE_1 East : 1304134.5300 Str Cat : Catch Basin Rim Elev : 142.0000 Area/sump: 0.00 sf/1.50 ft Bottom El: 136.6300 Cont Area: BSNCB5 Hgrade El: 138.3101 ft Bend.....: No special shape Ent type.: Area/sump: Ent Loss: 0.002 Exit: 0.012 App Vel: 0.006 Junct: 0.002 Bend: 0.007 Reach <Invert> <Diam> < n > <End> P6 138.130 12.00 0.012 Lower P5 138.130 12.00 0.012 Upper 10/13/19 9:12:16 pm page 6 KP DEVELOPMENT NE 38TH SP 25 YR CONVEYANCE/BACKWATER ANALYSIS ===================================================================== STRUCTURE REPORT PROPOSED STRUCTURE REACH ID No. CB7 Location : CB 7 North : 194499.4200 Str Type : TYPE_1 East : 1304055.3200 Str Cat : Catch Basin Rim Elev : 142.2000 Area/sump: 0.00 sf/1.50 ft Bottom El: 138.3500 Cont Area: BSNCB7 Hgrade El: 139.8548 ft Bend.....: No special shape Ent type.: Area/sump: Ent Loss: 0.000 Exit: 0.000 App Vel: 0.000 Junct: 0.000 Bend: 0.000 Reach <Invert> <Diam> < n > <End> P7 139.850 12.00 0.012 Upper PROPOSED STRUCTURE REACH ID No. INLET1 Location : INTO VAULT North : 194592.0600 Str Type : CAST_METAL_INLET East : 1304186.4600 Str Cat : Dummy Structure Rim Elev : 142.0000 Str Diam : 0.00 in Bottom El: 124.3000 Cont Area: Hgrade El: 0.0000 ft Bend.....: No special shape Ent type.: Str Diam : Ent Loss: 0.000 Exit: 0.000 App Vel: 0.000 Junct: 0.000 Bend: 0.000 Reach <Invert> <Diam> < n > <End> P1 124.300 12.00 0.012 Lower PROPOSED STRUCTURE REACH ID No. MH1 Location : MH 1 North : 194587.0600 Str Type : TYPE_2-48 East : 1304186.4600 Str Cat : Catch Basin Rim Elev : 142.3000 Area/sump: 0.00 sf/1.50 ft Bottom El: 122.9000 Cont Area: BSNCB1 Hgrade El: 125.0079 ft Bend.....: No special shape Ent type.: Area/sump: Ent Loss: 0.035 Exit: 0.175 App Vel: 0.000 Junct: 0.000 Bend: 0.000 Reach <Invert> <Diam> < n > <End> P5 135.800 12.00 0.012 Lower P1 124.400 12.00 0.012 Upper P2 135.800 12.00 0.012 Lower 10/13/19 9:12:16 pm page 7 KP DEVELOPMENT NE 38TH SP 25 YR CONVEYANCE/BACKWATER ANALYSIS ===================================================================== STRUCTURE REPORT PROPOSED STRUCTURE REACH ID No. MH2 Location : MH 2 North : 194582.0500 Str Type : TYPE_2-54 East : 1304213.1200 Str Cat : Catch Basin Rim Elev : 144.9000 Area/sump: 0.00 sf/1.50 ft Bottom El: 134.5000 Cont Area: BSNCB2 Hgrade El: 136.3992 ft Bend.....: No special shape Ent type.: Area/sump: Ent Loss: 0.015 Exit: 0.077 App Vel: 0.042 Junct: 0.011 Bend: 0.056 Reach <Invert> <Diam> < n > <End> P2 136.000 12.00 0.012 Upper P3 136.000 12.00 0.012 Lower P4 136.000 12.00 0.012 Lower PROPOSED STRUCTURE REACH ID No. MH6 Location : MH 6 North : 194497.5200 Str Type : TYPE_2-54 East : 1304131.5100 Str Cat : Catch Basin Rim Elev : 150.1000 Area/sump: 0.00 sf/1.50 ft Bottom El: 137.6300 Cont Area: BSNCB6 Hgrade El: 139.2920 ft Bend.....: No special shape Ent type.: Area/sump: Ent Loss: 0.001 Exit: 0.006 App Vel: 0.000 Junct: 0.000 Bend: 0.000 Reach <Invert> <Diam> < n > <End> P7 139.130 12.00 0.012 Lower P6 139.130 12.00 0.012 Upper 100 YEAR STORM CONVEYANCE AND BACKWATER ANALYSIS: Drainage Area Id: BSNCB1 Description.....: SUB BASIN CB1 <---Description--> SubArea SubC L (ft) Slope -Kr-- (min) BLDG 0.04 0.95 40.00 0.1500 20.00 0.09 ROAD 0.01 0.95 61.00 0.0500 20.00 0.23 LNSC 0.05 0.35 80.00 0.0700 7.00 0.72 SW 0.01 0.90 5.00 0.0200 20.00 0.03 Composite "c" Value........0.67 Time of Conc (min).. 1.06 Drainage Area Id: BSNCB2 Description.....: SUB BASIN CB2 <---Description--> SubArea SubC L (ft) Slope -Kr-- (min) BLDG 0.03 0.95 40.00 0.1500 20.00 0.09 ROAD 0.08 0.95 61.00 0.1100 20.00 0.15 LNSC 0.13 0.35 82.00 0.0700 7.00 0.74 SW 0.02 0.90 5.00 0.0200 20.00 0.03 Composite "c" Value........0.65 Time of Conc (min).. 1.01 Drainage Area Id: BSNCB3 Description.....: SUB BASIN CB3 <---Description--> SubArea SubC L (ft) Slope -Kr-- (min) LNDSC 0.01 0.35 10.00 0.2500 7.00 0.05 ROAD 0.04 0.95 54.00 0.1100 20.00 0.14 Composite "c" Value........0.83 Time of Conc (min).. 5.00 Drainage Area Id: BSNCB4 Description.....: SUB BASIN CB4 <---Description--> SubArea SubC L (ft) Slope -Kr-- (min) BLDG 0.11 0.95 40.00 0.1500 20.00 0.09 ROAD 0.12 0.95 54.00 0.1100 20.00 0.14 LNSC 0.19 0.35 99.00 0.0700 7.00 0.89 SW 0.03 0.90 5.00 0.0200 20.00 0.03 Composite "c" Value........0.69 Time of Conc (min).. 1.14 Drainage Area Id: BSNCB5 Description.....: SUB BASIN CB5 <---Description--> SubArea SubC L (ft) Slope -Kr-- (min) BLDG 0.04 0.95 40.00 0.1500 20.00 0.09 ROAD 0.01 0.95 10.00 0.1000 20.00 0.03 LNSC 0.05 0.35 72.00 0.0700 7.00 0.65 SW 0.01 0.90 5.00 0.0200 20.00 0.03 Composite "c" Value........0.67 Time of Conc (min).. 0.79 Drainage Area Id: BSNCB6 Description.....: SUB BASIN CB6 <---Description--> SubArea SubC L (ft) Slope -Kr-- (min) BLDG 0.08 0.95 40.00 0.1500 20.00 0.09 ROAD 0.06 0.95 10.00 0.1000 20.00 0.03 LNSC 0.10 0.35 105.00 0.0700 7.00 0.94 Composite "c" Value........0.70 Time of Conc (min).. 1.06 10/13/19 9:37:38 pm page 1 KP DEVELOPMENT NE 38TH SP 100 YR CONVEYANCE / BACKWATER ANALYSIS ===================================================================== RATIONAL DRAINAGE AREA SUMMARY Drainage Area Id: BSNCB7 Description.....: SUB BASIN CB 7 <---Description--> SubArea SubC L (ft) Slope -Kr-- (min) LNDSC 0.01 0.35 25.00 0.0700 7.00 0.22 SW 0.01 0.95 5.00 0.0200 20.00 0.03 Composite "c" Value........0.65 Time of Conc (min).. 0.25 10/13/19 9:37:38 pm page 2 KP DEVELOPMENT NE 38TH SP 100 YR CONVEYANCE / BACKWATER ANALYSIS ===================================================================== REACH SUMMARY Hydraulic Gradeline for Reach HYD1 <-FROM-> <--TO--> <FLOW> floss Ent_HGL EntLoss ExtLoss OutLet Inlet AppHead BndHead JunHead HeadWtr -cb/mh- -------- -------- cfs -loss- -Elev-- --loss- --loss- --Elev- --Elev- --loss- --loss- --loss- --Elev- --Rim-- =============================================================================================================== MH1 136.39 MH2 MH1 2.20 0.20 tw & dn <dc: Inlet Ctrl Assumed 136.49 0.07 0.09 0.02 136.52 144.90 CB3 MH2 1.63 0.36 tw & dn <dc: Inlet Ctrl Assumed 137.84 0.00 0.00 0.00 137.84 140.20 CB4 MH2 1.06 0.05 tw & dn <dc: Inlet Ctrl Assumed 149.96 0.00 0.00 0.00 149.96 153.80 INLET1 124.86 MH1 INLET1 3.32 0.10 tw & dn <dc: Inlet Ctrl Assumed 125.99 0.00 0.00 0.00 125.99 142.30 CB5 MH1 0.87 0.36 tw & dn <dc: Inlet Ctrl Assumed 138.33 0.01 0.01 0.00 138.34 142.00 MH6 CB5 0.62 1.00 tw & dn <dc: Inlet Ctrl Assumed 139.31 0.00 0.00 0.00 139.31 150.10 CB7 MH6 0.04 0.02 tw & dn <dc: Inlet Ctrl Assumed 139.86 0.00 0.00 0.00 139.86 142.20 CONVEYANCE RESULTS: Network Reach NET1 REACH <-AREA> <-DIA> LENGTH SLOPE < n > DSGN Q % PIPE Ndepth %Depth Vact Vfull C_Area ID (Ac) (ft) (ft) ft/ft ------ (cfs) ------ (ft) ------ (fps) (fps) ================================================================================================= P7 0.02 1.00 76.21 0.0094 0.0120 0.04 1.09 0.08 7.61 1.62 5.29 BSNCB7 P6 0.26 1.00 83.34 0.0120 0.0120 0.62 13.50 0.26 25.75 3.85 5.96 BSNCB6 P5 0.37 1.00 52.30 0.0445 0.0120 0.87 9.87 0.22 22.00 6.77 11.48 BSNCB5 Confluence with Network NET2 P1 1.45 1.00 5.00 0.0200 0.0120 3.32 56.42 0.56 56.23 7.30 7.69 BSNCB1 Network Reach NET2 REACH <-AREA> <-DIA> LENGTH SLOPE < n > DSGN Q % PIPE Ndepth %Depth Vact Vfull C_Area ID (Ac) (ft) (ft) ft/ft ------ (cfs) ------ (ft) ------ (fps) (fps) ================================================================================================= P4 0.45 1.00 71.63 0.1927 0.0120 1.06 5.81 0.17 16.94 12.04 23.88 BSNCB4 P3 0.71 1.00 59.77 0.0251 0.0120 1.63 24.75 0.35 35.23 6.60 8.62 BSNCB2 P2 0.97 1.00 27.13 0.0074 0.0120 2.20 61.63 0.59 59.48 4.52 4.67 BSNCB2 PIPE REACH ID No. P1 From: MH1 To: INLET1 Pipe Diameter: 1.0000 ft n: 0.0120 Pipe Length : 5.0000 ft s: 0.0200 Up invert : 124.4000 ft down invert: 124.3000 ft Collection Area: 1.4500 Ac. Design Flow : 3.3218 cfs Dsgn Depth: 0.56 ft Pipe Capacity : 5.8875 cfs Design Vel : 7.3032 fps Travel Time: 0.01 min Pipe Full Vel : 7.6932 fps 10/13/19 9:37:38 pm page 3 KP DEVELOPMENT NE 38TH SP 100 YR CONVEYANCE / BACKWATER ANALYSIS ===================================================================== REACH SUMMARY PIPE REACH ID No. P2 From: MH2 To: MH1 Pipe Diameter: 1.0000 ft n: 0.0120 Pipe Length : 27.1267 ft s: 0.0074 Up invert : 136.0000 ft down invert: 135.8000 ft Collection Area: 0.9700 Ac. Design Flow : 2.2032 cfs Dsgn Depth: 0.59 ft Pipe Capacity : 3.5746 cfs Design Vel : 4.5244 fps Travel Time: 0.10 min Pipe Full Vel : 4.6710 fps PIPE REACH ID No. P3 From: CB3 To: MH2 Pipe Diameter: 1.0000 ft n: 0.0120 Pipe Length : 59.7712 ft s: 0.0251 Up invert : 137.5000 ft down invert: 136.0000 ft Collection Area: 0.7100 Ac. Design Flow : 1.6320 cfs Dsgn Depth: 0.35 ft Pipe Capacity : 6.5950 cfs Design Vel : 6.6026 fps Travel Time: 0.15 min Pipe Full Vel : 8.6177 fps PIPE REACH ID No. P4 From: CB4 To: MH2 Pipe Diameter: 1.0000 ft n: 0.0120 Pipe Length : 71.6302 ft s: 0.1927 Up invert : 149.8000 ft down invert: 136.0000 ft Collection Area: 0.4500 Ac. Design Flow : 1.0608 cfs Dsgn Depth: 0.17 ft Pipe Capacity : 18.2729 cfs Design Vel : 12.0389 fps Travel Time: 0.10 min Pipe Full Vel : 23.8771 fps PIPE REACH ID No. P5 From: CB5 To: MH1 Pipe Diameter: 1.0000 ft n: 0.0120 Pipe Length : 52.3048 ft s: 0.0445 Up invert : 138.1300 ft down invert: 135.8000 ft Collection Area: 0.3700 Ac. Design Flow : 0.8670 cfs Dsgn Depth: 0.22 ft Pipe Capacity : 8.7866 cfs Design Vel : 6.7663 fps Travel Time: 0.13 min Pipe Full Vel : 11.4815 fps 10/13/19 9:37:38 pm page 4 KP DEVELOPMENT NE 38TH SP 100 YR CONVEYANCE / BACKWATER ANALYSIS ===================================================================== REACH SUMMARY PIPE REACH ID No. P6 From: MH6 To: CB5 Pipe Diameter: 1.0000 ft n: 0.0120 Pipe Length : 83.3447 ft s: 0.0120 Up invert : 139.1300 ft down invert: 138.1300 ft Collection Area: 0.2600 Ac. Design Flow : 0.6154 cfs Dsgn Depth: 0.26 ft Pipe Capacity : 4.5601 cfs Design Vel : 3.8453 fps Travel Time: 0.36 min Pipe Full Vel : 5.9587 fps PIPE REACH ID No. P7 From: CB7 To: MH6 Pipe Diameter: 1.0000 ft n: 0.0120 Pipe Length : 76.2137 ft s: 0.0094 Up invert : 139.8500 ft down invert: 139.1300 ft Collection Area: 0.0200 Ac. Design Flow : 0.0442 cfs Dsgn Depth: 0.08 ft Pipe Capacity : 4.0464 cfs Design Vel : 1.6152 fps Travel Time: 0.79 min Pipe Full Vel : 5.2874 fps UPSTREAM AREASFeet0100200 WWHM2012 PROJECT REPORT DETENTION VAULT CALCULATIONS FOR 15MIN AND COMPLIANCE. DRAFTNE38th-v2 11/22/2019 8:44:15 PM Page 2 General Model Information Project Name:NE38th-v2 Site Name:KP Development Site Address:NE 38th Street & Lincoln City:Renton Report Date:11/22/2019 Gage:Seatac Data Start:1948/10/01 Data End:2009/09/30 Timestep:15 Minute Precip Scale:1.000 Version Date:2019/09/13 Version:4.2.17 POC Thresholds Low Flow Threshold for POC1:50 Percent of the 2 Year High Flow Threshold for POC1:50 Year DRAFTNE38th-v2 11/22/2019 8:44:15 PM Page 3 Landuse Basin Data Predeveloped Land Use Basin 1 Bypass:No GroundWater:No Pervious Land Use acre C, Forest, Mod 1.33 Pervious Total 1.33 Impervious Land Use acre Impervious Total 0 Basin Total 1.33 Element Flows To: Surface Interflow Groundwater DRAFTNE38th-v2 11/22/2019 8:44:15 PM Page 4 Lateral Basin 1 Bypass:No GroundWater:No Pervious Land Use acre C, Forest, Mod .56 Element Flows To: Surface Interflow Groundwater DRAFTNE38th-v2 11/22/2019 8:44:15 PM Page 5 Mitigated Land Use Basin 1 Bypass:No GroundWater:No Pervious Land Use acre C, Lawn, Mod 0.597 Pervious Total 0.597 Impervious Land Use acre ROADS MOD 0.3753 ROOF TOPS FLAT 0.3044 SIDEWALKS MOD 0.0562 Impervious Total 0.7359 Basin Total 1.3329 Element Flows To: Surface Interflow Groundwater Vault 1 Vault 1 DRAFTNE38th-v2 11/22/2019 8:44:15 PM Page 6 Basin 2 Bypass:No GroundWater:No Pervious Land Use acre C, Forest, Mod 0.56 Pervious Total 0.56 Impervious Land Use acre Impervious Total 0 Basin Total 0.56 Element Flows To: Surface Interflow Groundwater Vault 1 Vault 1 DRAFTNE38th-v2 11/22/2019 8:44:15 PM Page 7 Routing Elements Predeveloped Routing DRAFTNE38th-v2 11/22/2019 8:44:15 PM Page 8 Mitigated Routing Vault 1 Width:22 ft. Length:79.7397820161017 ft. Depth:10 ft. Discharge Structure Riser Height:9 ft. Riser Diameter:18 in. Orifice 1 Diameter:0.67 in.Elevation:0 ft. Orifice 2 Diameter:1.11 in.Elevation:6.003 ft. Orifice 3 Diameter:0.7 in.Elevation:7.27458333333336 ft. Element Flows To: Outlet 1 Outlet 2 Vault Hydraulic Table Stage(feet)Area(ac.)Volume(ac-ft.)Discharge(cfs)Infilt(cfs) 0.0000 0.040 0.000 0.000 0.000 0.1111 0.040 0.004 0.004 0.000 0.2222 0.040 0.008 0.005 0.000 0.3333 0.040 0.013 0.007 0.000 0.4444 0.040 0.017 0.008 0.000 0.5556 0.040 0.022 0.009 0.000 0.6667 0.040 0.026 0.009 0.000 0.7778 0.040 0.031 0.010 0.000 0.8889 0.040 0.035 0.011 0.000 1.0000 0.040 0.040 0.012 0.000 1.1111 0.040 0.044 0.012 0.000 1.2222 0.040 0.049 0.013 0.000 1.3333 0.040 0.053 0.014 0.000 1.4444 0.040 0.058 0.014 0.000 1.5556 0.040 0.062 0.015 0.000 1.6667 0.040 0.067 0.015 0.000 1.7778 0.040 0.071 0.016 0.000 1.8889 0.040 0.076 0.016 0.000 2.0000 0.040 0.080 0.017 0.000 2.1111 0.040 0.085 0.017 0.000 2.2222 0.040 0.089 0.018 0.000 2.3333 0.040 0.094 0.018 0.000 2.4444 0.040 0.098 0.019 0.000 2.5556 0.040 0.102 0.019 0.000 2.6667 0.040 0.107 0.019 0.000 2.7778 0.040 0.111 0.020 0.000 2.8889 0.040 0.116 0.020 0.000 3.0000 0.040 0.120 0.021 0.000 3.1111 0.040 0.125 0.021 0.000 3.2222 0.040 0.129 0.021 0.000 3.3333 0.040 0.134 0.022 0.000 3.4444 0.040 0.138 0.022 0.000 3.5556 0.040 0.143 0.023 0.000 3.6667 0.040 0.147 0.023 0.000 3.7778 0.040 0.152 0.023 0.000 3.8889 0.040 0.156 0.024 0.000 4.0000 0.040 0.161 0.024 0.000 4.1111 0.040 0.165 0.024 0.000 DRAFTNE38th-v2 11/22/2019 8:44:15 PM Page 9 4.2222 0.040 0.170 0.025 0.000 4.3333 0.040 0.174 0.025 0.000 4.4444 0.040 0.179 0.025 0.000 4.5556 0.040 0.183 0.026 0.000 4.6667 0.040 0.187 0.026 0.000 4.7778 0.040 0.192 0.026 0.000 4.8889 0.040 0.196 0.026 0.000 5.0000 0.040 0.201 0.027 0.000 5.1111 0.040 0.205 0.027 0.000 5.2222 0.040 0.210 0.027 0.000 5.3333 0.040 0.214 0.028 0.000 5.4444 0.040 0.219 0.028 0.000 5.5556 0.040 0.223 0.028 0.000 5.6667 0.040 0.228 0.029 0.000 5.7778 0.040 0.232 0.029 0.000 5.8889 0.040 0.237 0.029 0.000 6.0000 0.040 0.241 0.029 0.000 6.1111 0.040 0.246 0.041 0.000 6.2222 0.040 0.250 0.046 0.000 6.3333 0.040 0.255 0.049 0.000 6.4444 0.040 0.259 0.053 0.000 6.5556 0.040 0.264 0.056 0.000 6.6667 0.040 0.268 0.058 0.000 6.7778 0.040 0.273 0.061 0.000 6.8889 0.040 0.277 0.063 0.000 7.0000 0.040 0.281 0.065 0.000 7.1111 0.040 0.286 0.067 0.000 7.2222 0.040 0.290 0.069 0.000 7.3333 0.040 0.295 0.074 0.000 7.4444 0.040 0.299 0.078 0.000 7.5556 0.040 0.304 0.082 0.000 7.6667 0.040 0.308 0.085 0.000 7.7778 0.040 0.313 0.087 0.000 7.8889 0.040 0.317 0.090 0.000 8.0000 0.040 0.322 0.093 0.000 8.1111 0.040 0.326 0.095 0.000 8.2222 0.040 0.331 0.097 0.000 8.3333 0.040 0.335 0.099 0.000 8.4444 0.040 0.340 0.102 0.000 8.5556 0.040 0.344 0.104 0.000 8.6667 0.040 0.349 0.106 0.000 8.7778 0.040 0.353 0.108 0.000 8.8889 0.040 0.358 0.110 0.000 9.0000 0.040 0.362 0.111 0.000 9.1111 0.040 0.366 0.701 0.000 9.2222 0.040 0.371 1.752 0.000 9.3333 0.040 0.375 2.999 0.000 9.4444 0.040 0.380 4.222 0.000 9.5556 0.040 0.384 5.218 0.000 9.6667 0.040 0.389 5.876 0.000 9.7778 0.040 0.393 6.373 0.000 9.8889 0.040 0.398 6.807 0.000 10.000 0.040 0.402 7.214 0.000 10.111 0.040 0.407 7.598 0.000 10.222 0.000 0.000 7.965 0.000 DRAFTNE38th-v2 11/22/2019 8:44:15 PM Page 10 Analysis Results POC 1 + Predeveloped x Mitigated Predeveloped Landuse Totals for POC #1 Total Pervious Area:1.89 Total Impervious Area:0 Mitigated Landuse Totals for POC #1 Total Pervious Area:1.157 Total Impervious Area:0.7359 Flow Frequency Method:Log Pearson Type III 17B Flow Frequency Return Periods for Predeveloped. POC #1 Return Period Flow(cfs) 2 year 0.056275 5 year 0.092212 10 year 0.115318 25 year 0.142805 50 year 0.161843 100 year 0.179626 Flow Frequency Return Periods for Mitigated. POC #1 Return Period Flow(cfs) 2 year 0.033695 5 year 0.055392 10 year 0.074214 25 year 0.104012 50 year 0.131229 100 year 0.163338 Annual Peaks Annual Peaks for Predeveloped and Mitigated. POC #1 Year Predeveloped Mitigated 1949 0.065 0.024 1950 0.077 0.045 1951 0.123 0.107 1952 0.039 0.021 1953 0.031 0.025 1954 0.048 0.028 1955 0.076 0.028 1956 0.062 0.058 1957 0.050 0.027 1958 0.055 0.029 DRAFTNE38th-v2 11/22/2019 8:44:53 PM Page 11 1959 0.047 0.024 1960 0.085 0.085 1961 0.047 0.028 1962 0.029 0.019 1963 0.040 0.027 1964 0.057 0.026 1965 0.038 0.035 1966 0.036 0.025 1967 0.086 0.028 1968 0.049 0.026 1969 0.047 0.024 1970 0.038 0.026 1971 0.043 0.028 1972 0.093 0.077 1973 0.041 0.043 1974 0.046 0.029 1975 0.064 0.026 1976 0.046 0.028 1977 0.007 0.019 1978 0.039 0.029 1979 0.023 0.019 1980 0.110 0.081 1981 0.034 0.026 1982 0.071 0.054 1983 0.061 0.029 1984 0.037 0.022 1985 0.022 0.022 1986 0.096 0.051 1987 0.085 0.068 1988 0.034 0.022 1989 0.022 0.021 1990 0.204 0.095 1991 0.108 0.088 1992 0.044 0.030 1993 0.043 0.023 1994 0.014 0.018 1995 0.062 0.030 1996 0.143 0.107 1997 0.110 0.095 1998 0.027 0.022 1999 0.121 0.068 2000 0.043 0.027 2001 0.008 0.017 2002 0.050 0.043 2003 0.074 0.023 2004 0.079 0.090 2005 0.059 0.028 2006 0.066 0.042 2007 0.154 0.111 2008 0.188 0.103 2009 0.088 0.053 Ranked Annual Peaks Ranked Annual Peaks for Predeveloped and Mitigated. POC #1 Rank Predeveloped Mitigated 1 0.2038 0.1108 2 0.1877 0.1070 3 0.1540 0.1067 DRAFTNE38th-v2 11/22/2019 8:44:53 PM Page 12 4 0.1427 0.1031 5 0.1230 0.0952 6 0.1208 0.0948 7 0.1101 0.0902 8 0.1099 0.0879 9 0.1081 0.0852 10 0.0964 0.0807 11 0.0933 0.0772 12 0.0875 0.0682 13 0.0864 0.0676 14 0.0851 0.0576 15 0.0848 0.0545 16 0.0793 0.0533 17 0.0769 0.0507 18 0.0765 0.0454 19 0.0743 0.0432 20 0.0713 0.0431 21 0.0662 0.0421 22 0.0648 0.0353 23 0.0638 0.0303 24 0.0617 0.0296 25 0.0616 0.0290 26 0.0610 0.0288 27 0.0589 0.0286 28 0.0565 0.0286 29 0.0552 0.0283 30 0.0497 0.0282 31 0.0497 0.0281 32 0.0486 0.0280 33 0.0479 0.0277 34 0.0474 0.0276 35 0.0473 0.0276 36 0.0467 0.0271 37 0.0459 0.0271 38 0.0456 0.0265 39 0.0441 0.0261 40 0.0431 0.0259 41 0.0429 0.0259 42 0.0429 0.0256 43 0.0414 0.0256 44 0.0399 0.0250 45 0.0386 0.0249 46 0.0385 0.0244 47 0.0380 0.0242 48 0.0376 0.0235 49 0.0367 0.0230 50 0.0361 0.0227 51 0.0345 0.0222 52 0.0336 0.0219 53 0.0312 0.0216 54 0.0290 0.0216 55 0.0270 0.0209 56 0.0233 0.0207 57 0.0222 0.0195 58 0.0218 0.0194 59 0.0145 0.0188 60 0.0077 0.0182 61 0.0067 0.0172 DRAFTNE38th-v2 11/22/2019 8:44:53 PM Page 13 DRAFTNE38th-v2 11/22/2019 8:44:53 PM Page 14 Duration Flows The Facility PASSED Flow(cfs)Predev Mit Percentage Pass/Fail 0.0281 17085 11976 70 Pass 0.0295 15490 7086 45 Pass 0.0308 14072 5508 39 Pass 0.0322 12803 5343 41 Pass 0.0335 11569 5189 44 Pass 0.0349 10515 5026 47 Pass 0.0362 9561 4868 50 Pass 0.0376 8750 4733 54 Pass 0.0389 8031 4605 57 Pass 0.0403 7347 4492 61 Pass 0.0416 6733 4331 64 Pass 0.0430 6190 4158 67 Pass 0.0443 5726 3985 69 Pass 0.0457 5309 3809 71 Pass 0.0470 4924 3608 73 Pass 0.0484 4569 3399 74 Pass 0.0497 4235 3247 76 Pass 0.0511 3951 3044 77 Pass 0.0524 3645 2868 78 Pass 0.0538 3388 2680 79 Pass 0.0551 3133 2526 80 Pass 0.0565 2915 2406 82 Pass 0.0578 2706 2282 84 Pass 0.0592 2488 2177 87 Pass 0.0606 2314 2043 88 Pass 0.0619 2136 1900 88 Pass 0.0633 1972 1768 89 Pass 0.0646 1822 1655 90 Pass 0.0660 1702 1531 89 Pass 0.0673 1577 1399 88 Pass 0.0687 1442 1268 87 Pass 0.0700 1325 1202 90 Pass 0.0714 1232 1166 94 Pass 0.0727 1147 1130 98 Pass 0.0741 1084 1095 101 Pass 0.0754 1020 1048 102 Pass 0.0768 947 995 105 Pass 0.0781 886 919 103 Pass 0.0795 824 856 103 Pass 0.0808 760 801 105 Pass 0.0822 725 751 103 Pass 0.0835 674 705 104 Pass 0.0849 623 633 101 Pass 0.0862 589 576 97 Pass 0.0876 549 519 94 Pass 0.0889 506 473 93 Pass 0.0903 469 425 90 Pass 0.0916 427 392 91 Pass 0.0930 388 346 89 Pass 0.0943 356 311 87 Pass 0.0957 328 263 80 Pass 0.0970 297 241 81 Pass 0.0984 270 215 79 Pass DRAFTNE38th-v2 11/22/2019 8:44:53 PM Page 15 0.0997 241 179 74 Pass 0.1011 219 146 66 Pass 0.1024 198 118 59 Pass 0.1038 176 92 52 Pass 0.1051 152 74 48 Pass 0.1065 130 53 40 Pass 0.1078 119 33 27 Pass 0.1092 105 23 21 Pass 0.1105 95 8 8 Pass 0.1119 84 0 0 Pass 0.1132 74 0 0 Pass 0.1146 69 0 0 Pass 0.1159 61 0 0 Pass 0.1173 54 0 0 Pass 0.1186 46 0 0 Pass 0.1200 39 0 0 Pass 0.1213 29 0 0 Pass 0.1227 25 0 0 Pass 0.1240 22 0 0 Pass 0.1254 20 0 0 Pass 0.1267 17 0 0 Pass 0.1281 14 0 0 Pass 0.1294 12 0 0 Pass 0.1308 9 0 0 Pass 0.1321 7 0 0 Pass 0.1335 7 0 0 Pass 0.1348 7 0 0 Pass 0.1362 6 0 0 Pass 0.1375 6 0 0 Pass 0.1389 6 0 0 Pass 0.1402 6 0 0 Pass 0.1416 6 0 0 Pass 0.1429 5 0 0 Pass 0.1443 5 0 0 Pass 0.1456 5 0 0 Pass 0.1470 5 0 0 Pass 0.1483 5 0 0 Pass 0.1497 5 0 0 Pass 0.1510 5 0 0 Pass 0.1524 4 0 0 Pass 0.1537 4 0 0 Pass 0.1551 3 0 0 Pass 0.1564 3 0 0 Pass 0.1578 3 0 0 Pass 0.1591 3 0 0 Pass 0.1605 3 0 0 Pass 0.1618 3 0 0 Pass DRAFTNE38th-v2 11/22/2019 8:44:54 PM Page 16 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. DRAFTNE38th-v2 11/22/2019 8:44:54 PM Page 17 LID Report DRAFTNE38th-v2 11/22/2019 8:45:22 PM Page 18 POC 2 POC #2 was not reported because POC must exist in both scenarios and both scenarios must have been run. DRAFTNE38th-v2 11/22/2019 8:45:22 PM Page 19 POC 3 POC #3 was not reported because POC must exist in both scenarios and both scenarios must have been run. DRAFTNE38th-v2 11/22/2019 8:45:22 PM Page 20 POC 4 POC #4 was not reported because POC must exist in both scenarios and both scenarios must have been run. DRAFTNE38th-v2 11/22/2019 8:45:22 PM Page 21 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. DRAFTNE38th-v2 11/22/2019 8:45:22 PM Page 22 Appendix Predeveloped Schematic DRAFTNE38th-v2 11/22/2019 8:45:23 PM Page 23 Mitigated Schematic DRAFTNE38th-v2 11/22/2019 8:45:23 PM Page 24 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 NE38th-v2.wdm MESSU 25 PreNE38th-v2.MES 27 PreNE38th-v2.L61 28 PreNE38th-v2.L62 30 POCNE38th-v21.dat END FILES OPN SEQUENCE INGRP INDELT 00:15 PERLND 11 PERLND 38 COPY 501 DISPLY 1 END INGRP END OPN SEQUENCE DISPLY DISPLY-INFO1 # - #<----------Title----------->***TRAN PIVL DIG1 FIL1 PYR DIG2 FIL2 YRND 1 Basin 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 *** 11 C, Forest, Mod 1 1 1 1 27 0 38 C, 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 *** 11 0 0 1 0 0 0 0 0 0 0 0 0 38 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 ********* DRAFTNE38th-v2 11/22/2019 8:45:23 PM Page 25 11 0 0 4 0 0 0 0 0 0 0 0 0 1 9 38 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 *** 11 0 0 0 0 0 0 0 0 0 0 0 38 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 11 0 4.5 0.08 400 0.1 0.5 0.996 38 0 4.5 0.08 400 0.1 0.5 0.996 END PWAT-PARM2 PWAT-PARM3 <PLS > PWATER input info: Part 3 *** # - # ***PETMAX PETMIN INFEXP INFILD DEEPFR BASETP AGWETP 11 0 0 2 2 0 0 0 38 0 0 2 2 0 0 0 END PWAT-PARM3 PWAT-PARM4 <PLS > PWATER input info: Part 4 *** # - # CEPSC UZSN NSUR INTFW IRC LZETP *** 11 0.2 0.5 0.35 6 0.5 0.7 38 0.2 0.5 0.35 6 0.5 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 11 0 0 0 0 2.5 1 0 38 0 0 0 0 2.5 1 0 END PWAT-STATE1 END PERLND IMPLND GEN-INFO <PLS ><-------Name-------> Unit-systems Printer *** # - # User t-series Engl Metr *** in out *** END GEN-INFO *** Section IWATER*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # ATMP SNOW IWAT SLD IWG IQAL *** END ACTIVITY PRINT-INFO <ILS > ******** Print-flags ******** PIVL PYR # - # ATMP SNOW IWAT SLD IWG IQAL ********* END PRINT-INFO IWAT-PARM1 <PLS > IWATER variable monthly parameter value flags *** # - # CSNO RTOP VRS VNN RTLI *** END IWAT-PARM1 IWAT-PARM2 <PLS > IWATER input info: Part 2 *** # - # *** LSUR SLSUR NSUR RETSC END IWAT-PARM2 IWAT-PARM3 DRAFTNE38th-v2 11/22/2019 8:45:23 PM Page 26 <PLS > IWATER input info: Part 3 *** # - # ***PETMAX PETMIN END IWAT-PARM3 IWAT-STATE1 <PLS > *** Initial conditions at start of simulation # - # *** RETS SURS END IWAT-STATE1 END IMPLND SCHEMATIC <-Source-> <--Area--> <-Target-> MBLK *** <Name> # <-factor-> <Name> # Tbl# *** Basin 1*** PERLND 11 1.33 COPY 501 12 PERLND 11 1.33 COPY 501 13 Lateral Basin 1*** PERLND 38 0.56 COPY 501 12 PERLND 38 0.56 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 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 DRAFTNE38th-v2 11/22/2019 8:45:23 PM Page 27 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 END MASS-LINK END RUN DRAFTNE38th-v2 11/22/2019 8:45:23 PM Page 28 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 NE38th-v2.wdm MESSU 25 MitNE38th-v2.MES 27 MitNE38th-v2.L61 28 MitNE38th-v2.L62 30 POCNE38th-v21.dat END FILES OPN SEQUENCE INGRP INDELT 00:15 PERLND 17 IMPLND 2 IMPLND 4 IMPLND 9 PERLND 11 RCHRES 1 COPY 1 COPY 501 DISPLY 1 END INGRP END OPN SEQUENCE DISPLY DISPLY-INFO1 # - #<----------Title----------->***TRAN PIVL DIG1 FIL1 PYR DIG2 FIL2 YRND 1 Vault 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 *** 17 C, Lawn, Mod 1 1 1 1 27 0 11 C, 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 *** 17 0 0 1 0 0 0 0 0 0 0 0 0 11 0 0 1 0 0 0 0 0 0 0 0 0 DRAFTNE38th-v2 11/22/2019 8:45:23 PM Page 29 END ACTIVITY PRINT-INFO <PLS > ***************** Print-flags ***************************** PIVL PYR # - # ATMP SNOW PWAT SED PST PWG PQAL MSTL PEST NITR PHOS TRAC ********* 17 0 0 4 0 0 0 0 0 0 0 0 0 1 9 11 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 *** 17 0 0 0 0 0 0 0 0 0 0 0 11 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 17 0 4.5 0.03 400 0.1 0.5 0.996 11 0 4.5 0.08 400 0.1 0.5 0.996 END PWAT-PARM2 PWAT-PARM3 <PLS > PWATER input info: Part 3 *** # - # ***PETMAX PETMIN INFEXP INFILD DEEPFR BASETP AGWETP 17 0 0 2 2 0 0 0 11 0 0 2 2 0 0 0 END PWAT-PARM3 PWAT-PARM4 <PLS > PWATER input info: Part 4 *** # - # CEPSC UZSN NSUR INTFW IRC LZETP *** 17 0.1 0.25 0.25 6 0.5 0.25 11 0.2 0.5 0.35 6 0.5 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 17 0 0 0 0 2.5 1 0 11 0 0 0 0 2.5 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 4 ROOF TOPS/FLAT 1 1 1 27 0 9 SIDEWALKS/MOD 1 1 1 27 0 END GEN-INFO *** Section IWATER*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # ATMP SNOW IWAT SLD IWG IQAL *** 2 0 0 1 0 0 0 4 0 0 1 0 0 0 9 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 0 1 9 4 0 0 4 0 0 0 1 9 DRAFTNE38th-v2 11/22/2019 8:45:23 PM Page 30 9 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 4 0 0 0 0 0 9 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 4 400 0.01 0.1 0.1 9 400 0.05 0.1 0.08 END IWAT-PARM2 IWAT-PARM3 <PLS > IWATER input info: Part 3 *** # - # ***PETMAX PETMIN 2 0 0 4 0 0 9 0 0 END IWAT-PARM3 IWAT-STATE1 <PLS > *** Initial conditions at start of simulation # - # *** RETS SURS 2 0 0 4 0 0 9 0 0 END IWAT-STATE1 END IMPLND SCHEMATIC <-Source-> <--Area--> <-Target-> MBLK *** <Name> # <-factor-> <Name> # Tbl# *** Basin 1*** PERLND 17 0.597 RCHRES 1 2 PERLND 17 0.597 RCHRES 1 3 IMPLND 2 0.3753 RCHRES 1 5 IMPLND 4 0.3044 RCHRES 1 5 IMPLND 9 0.0562 RCHRES 1 5 Basin 2*** PERLND 11 0.56 RCHRES 1 2 PERLND 11 0.56 RCHRES 1 3 ******Routing****** PERLND 17 0.597 COPY 1 12 IMPLND 2 0.3753 COPY 1 15 IMPLND 4 0.3044 COPY 1 15 IMPLND 9 0.0562 COPY 1 15 PERLND 17 0.597 COPY 1 13 PERLND 11 0.56 COPY 1 12 PERLND 11 0.56 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 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> # # *** DRAFTNE38th-v2 11/22/2019 8:45:23 PM Page 31 END NETWORK RCHRES GEN-INFO RCHRES Name Nexits Unit Systems Printer *** # - #<------------------><---> User T-series Engl Metr LKFG *** in out *** 1 Vault 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 92 4 Depth Area Volume Outflow1 Velocity Travel Time*** (ft) (acres) (acre-ft) (cfs) (ft/sec) (Minutes)*** 0.000000 0.040273 0.000000 0.000000 0.111111 0.040273 0.004475 0.004061 0.222222 0.040273 0.008949 0.005743 0.333333 0.040273 0.013424 0.007033 0.444444 0.040273 0.017899 0.008121 0.555556 0.040273 0.022374 0.009080 0.666667 0.040273 0.026848 0.009946 0.777778 0.040273 0.031323 0.010743 0.888889 0.040273 0.035798 0.011485 1.000000 0.040273 0.040273 0.012182 1.111111 0.040273 0.044747 0.012841 1.222222 0.040273 0.049222 0.013467 1.333333 0.040273 0.053697 0.014066 1.444444 0.040273 0.058172 0.014641 1.555556 0.040273 0.062646 0.015193 1.666667 0.040273 0.067121 0.015727 1.777778 0.040273 0.071596 0.016242 1.888889 0.040273 0.076070 0.016742 DRAFTNE38th-v2 11/22/2019 8:45:24 PM Page 32 2.000000 0.040273 0.080545 0.017228 2.111111 0.040273 0.085020 0.017700 2.222222 0.040273 0.089495 0.018159 2.333333 0.040273 0.093969 0.018608 2.444444 0.040273 0.098444 0.019046 2.555556 0.040273 0.102919 0.019474 2.666667 0.040273 0.107394 0.019893 2.777778 0.040273 0.111868 0.020303 2.888889 0.040273 0.116343 0.020705 3.000000 0.040273 0.120818 0.021099 3.111111 0.040273 0.125293 0.021487 3.222222 0.040273 0.129767 0.021867 3.333333 0.040273 0.134242 0.022241 3.444444 0.040273 0.138717 0.022608 3.555556 0.040273 0.143192 0.022970 3.666667 0.040273 0.147666 0.023326 3.777778 0.040273 0.152141 0.023677 3.888889 0.040273 0.156616 0.024023 4.000000 0.040273 0.161090 0.024363 4.111111 0.040273 0.165565 0.024699 4.222222 0.040273 0.170040 0.025031 4.333333 0.040273 0.174515 0.025358 4.444444 0.040273 0.178989 0.025681 4.555556 0.040273 0.183464 0.026000 4.666667 0.040273 0.187939 0.026316 4.777778 0.040273 0.192414 0.026627 4.888889 0.040273 0.196888 0.026935 5.000000 0.040273 0.201363 0.027239 5.111111 0.040273 0.205838 0.027540 5.222222 0.040273 0.210313 0.027838 5.333333 0.040273 0.214787 0.028132 5.444444 0.040273 0.219262 0.028424 5.555556 0.040273 0.223737 0.028713 5.666667 0.040273 0.228211 0.028998 5.777778 0.040273 0.232686 0.029281 5.888889 0.040273 0.237161 0.029561 6.000000 0.040273 0.241636 0.029839 6.111111 0.040273 0.246110 0.041108 6.222222 0.040273 0.250585 0.046041 6.333333 0.040273 0.255060 0.049873 6.444444 0.040273 0.259535 0.053139 6.555556 0.040273 0.264009 0.056044 6.666667 0.040273 0.268484 0.058691 6.777778 0.040273 0.272959 0.061144 6.888889 0.040273 0.277434 0.063443 7.000000 0.040273 0.281908 0.065615 7.111111 0.040273 0.286383 0.067681 7.222222 0.040273 0.290858 0.069656 7.333333 0.040273 0.295333 0.074775 7.444444 0.040273 0.299807 0.078860 7.555556 0.040273 0.304282 0.082194 7.666667 0.040273 0.308757 0.085182 7.777778 0.040273 0.313231 0.087948 7.888889 0.040273 0.317706 0.090553 8.000000 0.040273 0.322181 0.093029 8.111111 0.040273 0.326656 0.095401 8.222222 0.040273 0.331130 0.097683 8.333333 0.040273 0.335605 0.099888 8.444444 0.040273 0.340080 0.102024 8.555556 0.040273 0.344555 0.104100 8.666667 0.040273 0.349029 0.106120 8.777778 0.040273 0.353504 0.108089 8.888889 0.040273 0.357979 0.110013 9.000000 0.040273 0.362454 0.111894 9.111111 0.040273 0.366928 0.701541 9.222222 0.040273 0.371403 1.752486 9.333333 0.040273 0.375878 2.999831 9.444444 0.040273 0.380352 4.222683 9.555556 0.040273 0.384827 5.218112 9.666667 0.040273 0.389302 5.876932 DRAFTNE38th-v2 11/22/2019 8:45:24 PM Page 33 9.777778 0.040273 0.393777 6.373943 9.888889 0.040273 0.398251 6.807091 10.00000 0.040273 0.402726 7.213987 10.11111 0.040273 0.407201 7.598902 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*** 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 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 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 RCHRES ROFLOW COPY INPUT MEAN END MASS-LINK 16 END MASS-LINK END RUN DRAFTNE38th-v2 11/22/2019 8:45:24 PM Page 34 Predeveloped HSPF Message File DRAFTNE38th-v2 11/22/2019 8:45:24 PM Page 35 Mitigated HSPF Message File DRAFTNE38th-v2 11/22/2019 8:45:24 PM Page 36 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. 2005-2019; 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 MODEL RUN FOR DETERMING COMPLIANCE TO 100 YR PEAK W/ EXISTING CONDITIONS. DRAFTNE38th-v2-ex-LND 10/6/2019 10:07:50 PM Page 2 General Model Information Project Name:NE38th-v2-ex-LND Site Name:38th Ave NE SP Site Address:Lincoln & 38th City:Renton Report Date:10/6/2019 Gage:Seatac Data Start:1948/10/01 Data End:2009/09/30 Timestep:Hourly Precip Scale:1.00 Version Date:2016/02/25 Version:4.2.12 POC Thresholds Low Flow Threshold for POC1:50 Percent of the 2 Year High Flow Threshold for POC1:50 Year DRAFTNE38th-v2-ex-LND 10/6/2019 10:07:50 PM Page 3 Landuse Basin Data Predeveloped Land Use Basin 1 Bypass:No GroundWater:No Pervious Land Use acre C, Forest, Mod 1.014 C, Lawn, Mod 0.109 Pervious Total 1.123 Impervious Land Use acre ROADS FLAT 0.032 ROADS MOD 0.121 ROOF TOPS FLAT 0.057 Impervious Total 0.21 Basin Total 1.333 Element Flows To: Surface Interflow Groundwater DRAFTNE38th-v2-ex-LND 10/6/2019 10:07:50 PM Page 4 Lateral Basin 1 Bypass:No GroundWater:No Pervious Land Use acre C, Forest, Mod .56 Element Flows To: Surface Interflow Groundwater DRAFTNE38th-v2-ex-LND 10/6/2019 10:07:50 PM Page 5 Mitigated Land Use Basin 1 Bypass:Yes GroundWater:No Pervious Land Use acre C, Lawn, Mod 0.109 C, Forest, Mod 1.014 Pervious Total 1.123 Impervious Land Use acre ROADS FLAT 0.032 ROADS MOD 0.121 ROOF TOPS FLAT 0.057 Impervious Total 0.21 Basin Total 1.333 Element Flows To: Surface Interflow Groundwater DRAFTNE38th-v2-ex-LND 10/6/2019 10:07:50 PM Page 6 Lateral Basin 1 Bypass:Yes GroundWater:No Pervious Land Use acre C, Forest, Mod .56 Element Flows To: Surface Interflow Groundwater DRAFTNE38th-v2-ex-LND 10/6/2019 10:07:50 PM Page 7 Routing Elements Predeveloped Routing DRAFTNE38th-v2-ex-LND 10/6/2019 10:07:50 PM Page 8 Mitigated Routing DRAFTNE38th-v2-ex-LND 10/6/2019 10:07:50 PM Page 9 Analysis Results POC 1 + Predeveloped x Mitigated Predeveloped Landuse Totals for POC #1 Total Pervious Area:1.683 Total Impervious Area:0.21 Mitigated Landuse Totals for POC #1 Total Pervious Area:1.683 Total Impervious Area:0.21 Flow Frequency Method:Log Pearson Type III 17B Flow Frequency Return Periods for Predeveloped. POC #1 Return Period Flow(cfs) 2 year 0.091531 5 year 0.128533 10 year 0.155802 25 year 0.193513 50 year 0.224042 100 year 0.25672 Flow Frequency Return Periods for Mitigated. POC #1 Return Period Flow(cfs) 2 year 0.091531 5 year 0.128533 10 year 0.155802 25 year 0.193513 50 year 0.224042 100 year 0.25672 Annual Peaks Annual Peaks for Predeveloped and Mitigated. POC #1 Year Predeveloped Mitigated 1949 0.104 0.104 1950 0.192 0.192 1951 0.143 0.143 1952 0.074 0.074 1953 0.061 0.061 1954 0.083 0.083 1955 0.106 0.106 1956 0.108 0.108 1957 0.106 0.106 1958 0.081 0.081 <-------- MATCH THIS 100 YEAR RUNOFF (CHECK DETENTION CALCS) DRAFTNE38th-v2-ex-LND 10/6/2019 10:08:01 PM Page 10 1959 0.067 0.067 1960 0.111 0.111 1961 0.078 0.078 1962 0.052 0.052 1963 0.078 0.078 1964 0.086 0.086 1965 0.069 0.069 1966 0.078 0.078 1967 0.121 0.121 1968 0.090 0.090 1969 0.079 0.079 1970 0.078 0.078 1971 0.074 0.074 1972 0.142 0.142 1973 0.072 0.072 1974 0.075 0.075 1975 0.126 0.126 1976 0.080 0.080 1977 0.058 0.058 1978 0.080 0.080 1979 0.079 0.079 1980 0.097 0.097 1981 0.078 0.078 1982 0.143 0.143 1983 0.084 0.084 1984 0.081 0.081 1985 0.050 0.050 1986 0.136 0.136 1987 0.122 0.122 1988 0.056 0.056 1989 0.057 0.057 1990 0.200 0.200 1991 0.177 0.177 1992 0.078 0.078 1993 0.063 0.063 1994 0.043 0.043 1995 0.081 0.081 1996 0.157 0.157 1997 0.133 0.133 1998 0.073 0.073 1999 0.133 0.133 2000 0.094 0.094 2001 0.055 0.055 2002 0.103 0.103 2003 0.096 0.096 2004 0.189 0.189 2005 0.090 0.090 2006 0.104 0.104 2007 0.271 0.271 2008 0.197 0.197 2009 0.116 0.116 Ranked Annual Peaks Ranked Annual Peaks for Predeveloped and Mitigated. POC #1 Rank Predeveloped Mitigated 1 0.2712 0.2712 2 0.1998 0.1998 3 0.1973 0.1973 DRAFTNE38th-v2-ex-LND 10/6/2019 10:08:01 PM Page 11 4 0.1921 0.1921 5 0.1893 0.1893 6 0.1772 0.1772 7 0.1566 0.1566 8 0.1431 0.1431 9 0.1426 0.1426 10 0.1422 0.1422 11 0.1362 0.1362 12 0.1328 0.1328 13 0.1327 0.1327 14 0.1264 0.1264 15 0.1224 0.1224 16 0.1212 0.1212 17 0.1163 0.1163 18 0.1110 0.1110 19 0.1082 0.1082 20 0.1063 0.1063 21 0.1055 0.1055 22 0.1042 0.1042 23 0.1037 0.1037 24 0.1026 0.1026 25 0.0974 0.0974 26 0.0957 0.0957 27 0.0944 0.0944 28 0.0902 0.0902 29 0.0902 0.0902 30 0.0856 0.0856 31 0.0837 0.0837 32 0.0831 0.0831 33 0.0813 0.0813 34 0.0809 0.0809 35 0.0807 0.0807 36 0.0798 0.0798 37 0.0797 0.0797 38 0.0794 0.0794 39 0.0793 0.0793 40 0.0783 0.0783 41 0.0782 0.0782 42 0.0779 0.0779 43 0.0778 0.0778 44 0.0776 0.0776 45 0.0775 0.0775 46 0.0754 0.0754 47 0.0745 0.0745 48 0.0742 0.0742 49 0.0732 0.0732 50 0.0716 0.0716 51 0.0689 0.0689 52 0.0671 0.0671 53 0.0628 0.0628 54 0.0605 0.0605 55 0.0578 0.0578 56 0.0572 0.0572 57 0.0565 0.0565 58 0.0545 0.0545 59 0.0525 0.0525 60 0.0495 0.0495 61 0.0429 0.0429 DRAFTNE38th-v2-ex-LND 10/6/2019 10:08:01 PM Page 12 DRAFTNE38th-v2-ex-LND 10/6/2019 10:08:01 PM Page 13 Duration Flows The Facility PASSED Flow(cfs)Predev Mit Percentage Pass/Fail 0.0458 1943 1943 100 Pass 0.0476 1774 1774 100 Pass 0.0494 1606 1606 100 Pass 0.0512 1455 1455 100 Pass 0.0530 1333 1333 100 Pass 0.0548 1221 1221 100 Pass 0.0566 1117 1117 100 Pass 0.0584 1024 1024 100 Pass 0.0602 943 943 100 Pass 0.0620 858 858 100 Pass 0.0638 791 791 100 Pass 0.0656 724 724 100 Pass 0.0674 674 674 100 Pass 0.0692 620 620 100 Pass 0.0710 580 580 100 Pass 0.0728 523 523 100 Pass 0.0746 483 483 100 Pass 0.0764 433 433 100 Pass 0.0782 392 392 100 Pass 0.0800 360 360 100 Pass 0.0818 328 328 100 Pass 0.0836 310 310 100 Pass 0.0854 291 291 100 Pass 0.0872 270 270 100 Pass 0.0890 248 248 100 Pass 0.0908 229 229 100 Pass 0.0926 212 212 100 Pass 0.0944 196 196 100 Pass 0.0962 184 184 100 Pass 0.0980 169 169 100 Pass 0.0998 159 159 100 Pass 0.1016 146 146 100 Pass 0.1034 134 134 100 Pass 0.1052 126 126 100 Pass 0.1070 114 114 100 Pass 0.1088 108 108 100 Pass 0.1106 103 103 100 Pass 0.1124 96 96 100 Pass 0.1142 90 90 100 Pass 0.1160 82 82 100 Pass 0.1178 75 75 100 Pass 0.1196 72 72 100 Pass 0.1214 68 68 100 Pass 0.1232 59 59 100 Pass 0.1250 56 56 100 Pass 0.1268 49 49 100 Pass 0.1286 47 47 100 Pass 0.1304 45 45 100 Pass 0.1322 43 43 100 Pass 0.1340 40 40 100 Pass 0.1358 39 39 100 Pass 0.1376 36 36 100 Pass 0.1394 35 35 100 Pass DRAFTNE38th-v2-ex-LND 10/6/2019 10:08:01 PM Page 14 0.1412 31 31 100 Pass 0.1430 26 26 100 Pass 0.1448 23 23 100 Pass 0.1466 22 22 100 Pass 0.1484 20 20 100 Pass 0.1502 19 19 100 Pass 0.1520 19 19 100 Pass 0.1538 19 19 100 Pass 0.1556 19 19 100 Pass 0.1574 17 17 100 Pass 0.1592 17 17 100 Pass 0.1610 15 15 100 Pass 0.1628 15 15 100 Pass 0.1646 14 14 100 Pass 0.1664 14 14 100 Pass 0.1682 14 14 100 Pass 0.1700 13 13 100 Pass 0.1718 12 12 100 Pass 0.1736 11 11 100 Pass 0.1754 11 11 100 Pass 0.1772 10 10 100 Pass 0.1790 10 10 100 Pass 0.1808 9 9 100 Pass 0.1826 9 9 100 Pass 0.1844 9 9 100 Pass 0.1862 9 9 100 Pass 0.1880 8 8 100 Pass 0.1898 5 5 100 Pass 0.1916 4 4 100 Pass 0.1934 3 3 100 Pass 0.1952 3 3 100 Pass 0.1970 3 3 100 Pass 0.1988 2 2 100 Pass 0.2006 1 1 100 Pass 0.2024 1 1 100 Pass 0.2042 1 1 100 Pass 0.2060 1 1 100 Pass 0.2078 1 1 100 Pass 0.2096 1 1 100 Pass 0.2114 1 1 100 Pass 0.2132 1 1 100 Pass 0.2150 1 1 100 Pass 0.2168 1 1 100 Pass 0.2186 1 1 100 Pass 0.2204 1 1 100 Pass 0.2222 1 1 100 Pass 0.2240 1 1 100 Pass DRAFTNE38th-v2-ex-LND 10/6/2019 10:08:01 PM Page 15 Water Quality Water Quality BMP Flow and Volume for POC #1 On-line facility volume:0.0611 acre-feet On-line facility target flow:0.0343 cfs. Adjusted for 15 min:0.0343 cfs. Off-line facility target flow:0.0185 cfs. Adjusted for 15 min:0.0185 cfs. DRAFTNE38th-v2-ex-LND 10/6/2019 10:08:01 PM Page 16 LID Report DRAFTNE38th-v2-ex-LND 10/6/2019 10:08:07 PM Page 17 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. DRAFTNE38th-v2-ex-LND 10/6/2019 10:08:07 PM Page 18 Appendix Predeveloped Schematic DRAFTNE38th-v2-ex-LND 10/6/2019 10:08:08 PM Page 19 Mitigated Schematic DRAFTNE38th-v2-ex-LND 10/6/2019 10:08:08 PM Page 20 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 NE38th-v2-ex-LND.wdm MESSU 25 PreNE38th-v2-ex-LND.MES 27 PreNE38th-v2-ex-LND.L61 28 PreNE38th-v2-ex-LND.L62 30 POCNE38th-v2-ex-LND1.dat END FILES OPN SEQUENCE INGRP INDELT 00:60 PERLND 11 PERLND 17 IMPLND 1 IMPLND 2 IMPLND 4 PERLND 38 COPY 501 DISPLY 1 END INGRP END OPN SEQUENCE DISPLY DISPLY-INFO1 # - #<----------Title----------->***TRAN PIVL DIG1 FIL1 PYR DIG2 FIL2 YRND 1 Basin 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 *** 11 C, Forest, Mod 1 1 1 1 27 0 17 C, Lawn, Mod 1 1 1 1 27 0 38 C, 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 *** 11 0 0 1 0 0 0 0 0 0 0 0 0 17 0 0 1 0 0 0 0 0 0 0 0 0 DRAFTNE38th-v2-ex-LND 10/6/2019 10:08:08 PM Page 21 38 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 ********* 11 0 0 4 0 0 0 0 0 0 0 0 0 1 9 17 0 0 4 0 0 0 0 0 0 0 0 0 1 9 38 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 *** 11 0 0 0 0 0 0 0 0 0 0 0 17 0 0 0 0 0 0 0 0 0 0 0 38 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 11 0 4.5 0.08 400 0.1 0.5 0.996 17 0 4.5 0.03 400 0.1 0.5 0.996 38 0 4.5 0.08 400 0.1 0.5 0.996 END PWAT-PARM2 PWAT-PARM3 <PLS > PWATER input info: Part 3 *** # - # ***PETMAX PETMIN INFEXP INFILD DEEPFR BASETP AGWETP 11 0 0 2 2 0 0 0 17 0 0 2 2 0 0 0 38 0 0 2 2 0 0 0 END PWAT-PARM3 PWAT-PARM4 <PLS > PWATER input info: Part 4 *** # - # CEPSC UZSN NSUR INTFW IRC LZETP *** 11 0.2 0.5 0.35 6 0.5 0.7 17 0.1 0.25 0.25 6 0.5 0.25 38 0.2 0.5 0.35 6 0.5 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 11 0 0 0 0 2.5 1 0 17 0 0 0 0 2.5 1 0 38 0 0 0 0 2.5 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 2 ROADS/MOD 1 1 1 27 0 4 ROOF TOPS/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 2 0 0 1 0 0 0 4 0 0 1 0 0 0 DRAFTNE38th-v2-ex-LND 10/6/2019 10:08:08 PM Page 22 END ACTIVITY PRINT-INFO <ILS > ******** Print-flags ******** PIVL PYR # - # ATMP SNOW IWAT SLD IWG IQAL ********* 1 0 0 4 0 0 0 1 9 2 0 0 4 0 0 0 1 9 4 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 *** 1 0 0 0 0 0 2 0 0 0 0 0 4 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 2 400 0.05 0.1 0.08 4 400 0.01 0.1 0.1 END IWAT-PARM2 IWAT-PARM3 <PLS > IWATER input info: Part 3 *** # - # ***PETMAX PETMIN 1 0 0 2 0 0 4 0 0 END IWAT-PARM3 IWAT-STATE1 <PLS > *** Initial conditions at start of simulation # - # *** RETS SURS 1 0 0 2 0 0 4 0 0 END IWAT-STATE1 END IMPLND SCHEMATIC <-Source-> <--Area--> <-Target-> MBLK *** <Name> # <-factor-> <Name> # Tbl# *** Basin 1*** PERLND 11 1.014 COPY 501 12 PERLND 11 1.014 COPY 501 13 PERLND 17 0.109 COPY 501 12 PERLND 17 0.109 COPY 501 13 IMPLND 1 0.032 COPY 501 15 IMPLND 2 0.121 COPY 501 15 IMPLND 4 0.057 COPY 501 15 Lateral Basin 1*** PERLND 38 0.56 COPY 501 12 PERLND 38 0.56 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 12.1 DISPLY 1 INPUT TIMSER 1 <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** DRAFTNE38th-v2-ex-LND 10/6/2019 10:08:08 PM Page 23 <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 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 SUM PERLND 1 999 EXTNL PREC WDM 2 PREC ENGL 1 SUM 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 12.1 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 DRAFTNE38th-v2-ex-LND 10/6/2019 10:08:08 PM Page 24 END MASS-LINK 13 MASS-LINK 15 IMPLND IWATER SURO 0.083333 COPY INPUT MEAN END MASS-LINK 15 END MASS-LINK END RUN DRAFTNE38th-v2-ex-LND 10/6/2019 10:08:08 PM Page 25 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 NE38th-v2-ex-LND.wdm MESSU 25 MitNE38th-v2-ex-LND.MES 27 MitNE38th-v2-ex-LND.L61 28 MitNE38th-v2-ex-LND.L62 END FILES OPN SEQUENCE INGRP INDELT 00:60 PERLND 17 PERLND 11 IMPLND 1 IMPLND 2 IMPLND 4 PERLND 39 COPY 501 COPY 601 END INGRP END OPN SEQUENCE DISPLY DISPLY-INFO1 # - #<----------Title----------->***TRAN PIVL DIG1 FIL1 PYR DIG2 FIL2 YRND END DISPLY-INFO1 END DISPLY COPY TIMESERIES # - # NPT NMN *** 1 1 1 501 1 1 601 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 *** 17 C, Lawn, Mod 1 1 1 1 27 0 11 C, Forest, Mod 1 1 1 1 27 0 39 C, 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 *** 17 0 0 1 0 0 0 0 0 0 0 0 0 11 0 0 1 0 0 0 0 0 0 0 0 0 39 0 0 1 0 0 0 0 0 0 0 0 0 DRAFTNE38th-v2-ex-LND 10/6/2019 10:08:08 PM Page 26 END ACTIVITY PRINT-INFO <PLS > ***************** Print-flags ***************************** PIVL PYR # - # ATMP SNOW PWAT SED PST PWG PQAL MSTL PEST NITR PHOS TRAC ********* 17 0 0 4 0 0 0 0 0 0 0 0 0 1 9 11 0 0 4 0 0 0 0 0 0 0 0 0 1 9 39 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 *** 17 0 0 0 0 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 0 0 0 39 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 17 0 4.5 0.03 400 0.1 0.5 0.996 11 0 4.5 0.08 400 0.1 0.5 0.996 39 0 4.5 0.08 400 0.1 0.5 0.996 END PWAT-PARM2 PWAT-PARM3 <PLS > PWATER input info: Part 3 *** # - # ***PETMAX PETMIN INFEXP INFILD DEEPFR BASETP AGWETP 17 0 0 2 2 0 0 0 11 0 0 2 2 0 0 0 39 0 0 2 2 0 0 0 END PWAT-PARM3 PWAT-PARM4 <PLS > PWATER input info: Part 4 *** # - # CEPSC UZSN NSUR INTFW IRC LZETP *** 17 0.1 0.25 0.25 6 0.5 0.25 11 0.2 0.5 0.35 6 0.5 0.7 39 0.2 0.5 0.35 6 0.5 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 17 0 0 0 0 2.5 1 0 11 0 0 0 0 2.5 1 0 39 0 0 0 0 2.5 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 2 ROADS/MOD 1 1 1 27 0 4 ROOF TOPS/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 2 0 0 1 0 0 0 4 0 0 1 0 0 0 END ACTIVITY DRAFTNE38th-v2-ex-LND 10/6/2019 10:08:08 PM Page 27 PRINT-INFO <ILS > ******** Print-flags ******** PIVL PYR # - # ATMP SNOW IWAT SLD IWG IQAL ********* 1 0 0 4 0 0 0 1 9 2 0 0 4 0 0 0 1 9 4 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 *** 1 0 0 0 0 0 2 0 0 0 0 0 4 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 2 400 0.05 0.1 0.08 4 400 0.01 0.1 0.1 END IWAT-PARM2 IWAT-PARM3 <PLS > IWATER input info: Part 3 *** # - # ***PETMAX PETMIN 1 0 0 2 0 0 4 0 0 END IWAT-PARM3 IWAT-STATE1 <PLS > *** Initial conditions at start of simulation # - # *** RETS SURS 1 0 0 2 0 0 4 0 0 END IWAT-STATE1 END IMPLND SCHEMATIC <-Source-> <--Area--> <-Target-> MBLK *** <Name> # <-factor-> <Name> # Tbl# *** Basin 1*** PERLND 17 0.109 COPY 501 12 PERLND 17 0.109 COPY 601 12 PERLND 17 0.109 COPY 501 13 PERLND 17 0.109 COPY 601 13 PERLND 11 1.014 COPY 501 12 PERLND 11 1.014 COPY 601 12 PERLND 11 1.014 COPY 501 13 PERLND 11 1.014 COPY 601 13 IMPLND 1 0.032 COPY 501 15 IMPLND 1 0.032 COPY 601 15 IMPLND 2 0.121 COPY 501 15 IMPLND 2 0.121 COPY 601 15 IMPLND 4 0.057 COPY 501 15 IMPLND 4 0.057 COPY 601 15 Lateral Basin 1*** PERLND 39 0.56 COPY 501 12 PERLND 39 0.56 COPY 601 12 PERLND 39 0.56 COPY 501 13 PERLND 39 0.56 COPY 601 13 ******Routing****** END SCHEMATIC DRAFTNE38th-v2-ex-LND 10/6/2019 10:08:08 PM Page 28 NETWORK <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> # <Name> # #<-factor->strg <Name> # # <Name> # # *** <-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 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 SUM PERLND 1 999 EXTNL PREC WDM 2 PREC ENGL 1 SUM 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 12.1 WDM 701 FLOW ENGL REPL COPY 501 OUTPUT MEAN 1 1 12.1 WDM 801 FLOW ENGL REPL COPY 601 OUTPUT MEAN 1 1 12.1 WDM 901 FLOW ENGL REPL END EXT TARGETS DRAFTNE38th-v2-ex-LND 10/6/2019 10:08:08 PM Page 29 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 DRAFTNE38th-v2-ex-LND 10/6/2019 10:08:08 PM Page 30 Predeveloped HSPF Message File DRAFTNE38th-v2-ex-LND 10/6/2019 10:08:08 PM Page 31 Mitigated HSPF Message File DRAFTNE38th-v2-ex-LND 10/6/2019 10:08:08 PM Page 32 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. 2005-2019; 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