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RS_Drainage_Technical_Information_Report_220202_v1
FINAL TECHNICAL INFORMATION REPORT FOR WANG SHORT PLAT CITY OF RENTON IN KING COUNTY, WASHINGTON 2/2/2022 Project Manager: Joshua Beard, P.L.A. Prepared by: Preston Longoni, P.E. Date: November 20, 2018 Revised: February 2, 2022 Core No.: 17150A Core Design, Inc. WANG SHORT PLAT i Wang Short Plat Table of Contents 1 PROJECT OVERVIEW ..................................................................................................................... 1 Figure 1-1: Vicinity Map ..................................................................................................... 2 2 CONDITIONS AND REQUIREMENTS SUMMARY ........................................................................... 3 2.1 Core Requirements ............................................................................................................... 3 2.1.1 Core Requirement #1: Discharge at the Natural Location ............................................ 3 2.1.2 Core Requirement #2: Offsite Analysis .......................................................................... 3 2.1.3 Core Requirement #3: Flow Control .............................................................................. 3 2.1.4 Core Requirement #4: Conveyance System .................................................................. 3 2.1.5 Core Requirements #5: Erosion and Sediment Control ................................................. 3 2.1.6 Core Requirement #6: Maintenance and Operations ................................................... 3 2.1.7 Core Requirement #7: Financial Guarantees and Liability ............................................ 3 2.1.8 Core Requirement #8: Water Quality ............................................................................ 3 2.1.9 Core Requirement #9: Flow Control BMPs .................................................................... 4 2.2 Special Requirement #1: Other Adopted Area-Specific Requirements ................................ 4 2.2.1 Critical Drainage Areas ................................................................................................... 4 2.2.2 Master Drainage Plan .................................................................................................... 4 2.2.3 Basin Plans ..................................................................................................................... 4 2.2.4 Salmon Conservation Plans (SCPs) ................................................................................. 4 2.2.5 Stormwater Compliance Plans (SWCPs) ........................................................................ 5 2.2.6 Lake Management Plans (LMPs) .................................................................................... 5 2.2.7 Flood Hazard Reduction Plan Updates (FHRPs) ............................................................. 5 2.2.8 Shared Facility Drainage Plans (SFDPs) .......................................................................... 5 2.3 Special Requirement #2: Floodplain / Floodway Delineation ............................................... 5 2.4 Special Requirement #3: Flood Protection Facilities ............................................................ 5 2.5 Special Requirement #4: Source Controls ............................................................................. 5 2.6 Special Requirement #5: Oil Control ..................................................................................... 5 2.7 Special Requirement #6: Aquifer Protection Area ................................................................ 5 3 OFFSITE ANALYSIS ......................................................................................................................... 6 Core Design, Inc. WANG SHORT PLAT ii TASK 1 Study Area Definition and Maps ..................................................................................... 6 TASK 2 Resource Review ............................................................................................................. 6 TASK 3 Field Investigation ........................................................................................................... 7 Figure 3-1: Downstream Drainage Exhibit......................................................................... 8 TASK 4 Drainage System Description and Problem Description ................................................. 9 TASK 5 Mitigation of Existing and Potential Problems ................................................................ 9 4 FLOW CONTROL AND WATER QUALITY DESIGN ........................................................................ 13 4.1 Predeveloped Site Hydrology .............................................................................................. 13 4.2 Developed Site Hydrology ................................................................................................... 14 Figure 4-1: Existing Conditions Exhibit ............................................................................ 15 Figure 4-2: Developed Conditions Exhibit ....................................................................... 16 4.3 Performance Standards....................................................................................................... 17 4.4 Flow Control System ........................................................................................................... 18 4.5 Water Quality Calculations ................................................................................................. 21 5 CONVEYANCE SYSTEM ANALYSIS AND DESIGN .......................................................................... 22 Figure 5-1: Catch Basin Tributary Areas ........................................................................... 23 6 SPECIAL REPORTS AND STUDIES ................................................................................................. 26 7 OTHER PERMITS .......................................................................................................................... 27 8 ESC ANALYSIS AND DESIGN ........................................................................................................ 28 9 BOND QUANTITIES, FACILITY SUMMARIES, AND DECLARATION OF COVENANT ...................... 29 9.1 Bond Quantities .................................................................................................................. 29 9.2 Facility Summary ................................................................................................................. 29 9.3 Declaration of Covenant ..................................................................................................... 29 10 OPERATIONS AND MAINTENANCE ........................................................................................... 30 Core Design, Inc. WANG SHORT PLAT iii Appendix A – Parcel Information King County Parcel Report (0007200196) Appendix B – Resource Review & Off-site Analysis Documentation Aquifer Protection Zone FIRM Map Coal Mine Hazard Map Erosion Hazard Map Slide Hazard Map Steep Slopes Map Drainage Complaints Exhibit Appendix C – Vault Sizing WWHM Vault Modeling Report Core Design, Inc. WANG SHORT PLAT Page 1 1 PROJECT OVERVIEW The project site is located in the Soos Creek drainage basin, on the northwest side of the 90 degree turn in SE 191st Street / 117th Place SE in the City of Renton, King County. Specifically, the project is in the southwest quarter of Section 33, Township 23 North, Range 5 East, W.M. It is bordered by single family residential on all sides. The King County tax parcel ID number for the existing parcel is shown in Table 1 below (refer to the King County Parcel Reports included in Appendix A). See Figure 1-1: Vicinity Map, provided on the following page. Table 1: Parcel Information KC Parcel # Site Address Site Area (SF) 6198400125 19016 116th Ave SE 88,862 The total project site is 2.04 acres in size and currently has one single family residence at the west end of the property while the remaining 75% or so is completely forested. The site drains to the southwest at a slope ranging between 1 and 10 percent. Proposed development of the property will include constructing seven new residences and the associated roads, driveways, utilities and stormwater vault. The existing residence on future Lot 1 will be demolished. The project will be designed using the guidelines and requirements established in the 2017 City of Renton Surface Water Design Manual (2017 CRSWDM). The project required to match forested site conditions (or a Conservation Flow Control) and Basic Water Quality treatment. The drainage analysis for detention and water quality treatment was completed using WWHM. Core Design, Inc. WANG SHORT PLAT Page 2 Figure 1-1: Vicinity Map Core Design, Inc. WANG SHORT PLAT Page 3 2 CONDITIONS AND REQUIREMENTS SUMMARY The proposed project is classified as requiring “Full Drainage Review” per the 2017 CRSWDM. Therefore, all nine core requirements and six special requirements will be addressed per Section 1.1 of the 2017 CRSWDM). 2.1 Core Requirements 2.1.1 Core Requirement #1: Discharge at the Natural Location The project will maintain the natural discharge location at the southwest corner of the property. As discussed in the downstream analysis, the site discharges to the southeast. 2.1.2 Core Requirement #2: Offsite Analysis This core requirement is addressed in Section 3 of this report. 2.1.3 Core Requirement #3: Flow Control The detention vault is designed to meet the flow control duration standard matching forested conditions. This requires that the developed condition discharge durations match the forested condition durations from 50% of the 2-year to the 50-year storm events and that the developed 2-year and 10-year peak discharge rates do not exceed the existing 2-year and 10-year peak discharge rates, respectively. 2.1.4 Core Requirement #4: Conveyance System A backwater analysis using King County Backwater (KCBW) will be performed as part of this Utility Permit to show that the proposed conveyance system provides sufficient capacity for the 25-year storm as calculated by the Rational Method. Refer to Section 5 of this report for the conveyance and backwater analysis. 2.1.5 Core Requirements #5: Erosion and Sediment Control Erosion and sediment control will be provided through catch basin protection, interceptor swales, rock check dams, silt fencing, a sediment trap, and a construction access entrance. 2.1.6 Core Requirement #6: Maintenance and Operations The City of Renton will be responsible for the maintenance and operations of the stormwater facility located in Tract A. An Operations and Maintenance Manual is provided in Section 10. 2.1.7 Core Requirement #7: Financial Guarantees and Liability A bond quantities worksheet is provided in Section 9 of this report. 2.1.8 Core Requirement #8: Water Quality Basic water quality treatment is provided by dead storage within the combined detention/water quality vault in Tract A. The water quality calculations are provided in Section 4. Core Design, Inc. WANG SHORT PLAT Page 4 2.1.9 Core Requirement #9: Flow Control BMPs On-site BMPs are required to be mitigated to the maximum extent feasible for all associated plat infrastructure improvements including roads and sidewalks per Section 1.2.9.4 of the CRSWDM and must occur concurrently as part of the proposed project. BMPs associated with the individual lots may be delayed until construction on the lots. Due to the site layout, the soils, set-backs and the proposed road section, there are no feasible BMPs that can be applied to the road/sidewalk on this project. This project falls under the “Small Lot BMP” category per Section 1.2.9.2.1 of the 2017 CRSWDM since the proposed lots are less than 22,0000 square feet. Due to site constraints, setbacks, and inadequate native vegetated flow path, full dispersion is not feasible. Due to the dense till characteristics of the on-site soils and shallow groundwater, the geotechnical engineer suggests that infiltration is also infeasible for the mitigation of stormwater on this project. This includes the use of bioretention and permeable pavement. Basic dispersion, specifically sheet flow dispersion with a 10-foot minimum vegetated flow path is the only feasible BMP for this project. It is proposed that every driveway, patio, and walkway is adequately sheet flow dispersed. If the developed site conditions allow, splash block or other means of basic dispersion shall be utilized to the maximum extent feasible on the lots. Since all of the proposed lots are under 11,000 square feet, a minimum of 10% of the total lot areas are required to be treated by a BMP. All of the lots are between 9,000 and 10,000 square feet so between 900 and 1,000 square feet of surface area shall be mitigated on each of the lots by sheet flow dispersion or another BMP. The driveway area on each property will be at least 30-feet long by 20-feet wide which will account for at least 600 square feet of the required total. If the walkways and patios do not sufficiently make up the remaining 300-400 square feet, then reduced impervious credit or retention of native vegetation will be implemented. The 10% impervious reduction credit for basic dispersion has not been accounted for in the detention vault modeling as a factor of safety, since the credit is negligible anyways. 2.2 Special Requirement #1: Other Adopted Area-Specific Requirements 2.2.1 Critical Drainage Areas Per the City’s Aquifer Protection Zone map, the project is not in an aquifer protection zone. 2.2.2 Master Drainage Plan Not applicable. 2.2.3 Basin Plans There are no basin plans for this project. 2.2.4 Salmon Conservation Plans (SCPs) There are no salmon conservation plans for this project. Core Design, Inc. WANG SHORT PLAT Page 5 2.2.5 Stormwater Compliance Plans (SWCPs) Not applicable. 2.2.6 Lake Management Plans (LMPs) Not applicable. 2.2.7 Flood Hazard Reduction Plan Updates (FHRPs) This project is not within a floodplain and is not within an area with an applicable Flood Hazard Reduction Plan. Therefore, additional requirements from a Flood Hazard Reduction Plan do not apply. 2.2.8 Shared Facility Drainage Plans (SFDPs) Not applicable. 2.3 Special Requirement #2: Floodplain / Floodway Delineation This project is not located within the 100-year floodplain. 2.4 Special Requirement #3: Flood Protection Facilities As this project is not located within a 100-year floodplain there are no levees, revetments or berms within the project. 2.5 Special Requirement #4: Source Controls These requirements are not applicable as the project is not a commercial, industrial or multi- family development. 2.6 Special Requirement #5: Oil Control This requirement does not apply because the project is not a commercial or industrial development nor is it expected to have more than 15,000 vehicles per day. 2.7 Special Requirement #6: Aquifer Protection Area This requirement does not apply because the project is not located within an Aquifer Protection Area. Core Design, Inc. WANG SHORT PLAT Page 6 3 OFFSITE ANALYSIS TASK 1 Study Area Definition and Maps The proposed project contains parcel number 6198400125. A map of the downstream is included at the end of this section as Figure 3-1: Downstream Drainage Exhibit. TASK 2 Resource Review Basin Reconnaissance Summary Reports: No Basin Reconnaissance Summary Reports appear to be available for the area that is within one mile of this project site. FEMA Maps: A FEMA map dated May 16, 1995 number 53033C0991F was reviewed. The site is not located within a floodplain as it is covered by “Zone X – Outside of 500-year floodplain. The FEMA Map is included in Appendix B. Sensitive Areas Folio: The City of Renton Sensitive Areas Maps were reviewed, and this project is not located within any sensitive areas. The maps are included in Appendix B. Soils The Geotechnical Report was completed by Terra Associates, Inc. on February 26, 2018. Field exploration indicated the site is underlain at relatively shallow depths by till-like soils consisting of medium dense to dense silty sand with gravel and light to moderate perched groundwater seepage was encountered in all seven of the test pits. Downstream Drainage Complaints Drainage complaints were researched within the study area. King County lists a few complaints, but they were all closed 1998 or earlier. The City of Renton map shows no drainage complaints within ¼ miles of the site along the downstream system. Restrictive Well Covenant There is no existing well onsite. Core Design, Inc. WANG SHORT PLAT Page 7 TASK 3 Field Investigation The field investigation took place on December 20, 2017. It was approximately 38 degrees, partly sunny, and had just finished raining for a few days prior. Upstream Tributary Area There appeared to be trace amounts of upstream runoff. The adjacent upstream properties have recently been developed and most of the runoff is tributary to a flow control facility that has a discharge that bypasses the project site. Downstream Analysis The downstream analysis began at the southeast corner of the site where runoff is collected by a type 1 catch basin in the north side of 191st street. The flow is then conveyed to the east via 12-inch pipe and type 1 catch basins for approximately 120 feet where it then turns south across 191st and enters a type 2 catch basin. The flow turns and heads east again, via 24-inch diameter pipe and type 2 catch basins approximately another 275 feet. The flow discharges into a large detention/water quality pond located at the southwest corner of the intersection of SE 191st Street and 120th Ave SE. The pond discharges near the west edge of 120th Ave SE and flows southerly to a birdcage type 2 structure (which also picks up the ditch which flows above the subject pipe) located in the northwest corner of the intersection of 120th Ave SE and SE192nd Street via 12-inch diameter pipe. The system continues south for another 20 feet. Still in the north side of 192nd, the flow turns east and heads down the hill via 12-inch diameter pipe for another 300 feet, where the downstream analysis ends beyond ¼ mile downstream of the project site. There were no signs of erosion, flooding, or capacity issues along the entire downstream path. FIGURE 3-1: DOWNSTREAM DRAINAGE EXHIBIT 2,257376 City of Renton Print map Template This map is a user generated static output from an Internet mapping site and is for reference only. Data layers that appear on this map may or may not be accurate, current, or otherwise reliable. THIS MAP IS NOT TO BE USED FOR NAVIGATIONWGS_1984_Web_Mercator_Auxiliary_Sphere Notes None 12/20/2017 Legend 256 0 128 256 Feet Information Technology - GIS RentonMapSupport@Rentonwa.gov City and County Boundary Addresses Parcels Network Structures Inlet Manhole Utility Vault Unknown Structure Control Structure Pump Station Discharge Point Water Quality Detention Facilities Pond Tank Vault Wetland Stormwater Main Culvert Open Drains Virtual Drainline Facility Outline Private Network Structures Inlet Manhole Utility Vault Unknown Structure Private Control Structure Private Discharge Point Private Water Quality Private Detention Facilities Pond Tank Vault Wetland Private Pipe Private Culvert Private Open Drains Private Facility Outline Flow Control BMP Fence Drainage Complaints Known Drainage Issues Renton King County Core Design, Inc. WANG SHORT PLAT Page 9 TASK 4 Drainage System Description and Problem Description There are no drainage complaints within ¼ mile along the downstream system that remain open beyond 1998. TASK 5 Mitigation of Existing and Potential Problems Downstream Drainage Problems Requiring Special Attention Type 1 – Conveyance System Nuisance Problems There are no known, reported or observed current downstream conveyance nuisance problems. Type 2 – Severe Erosion Problems There are no known, reported or observed current downstream severe erosion problems. Type 3-Severe Flooding Problems There are no known, reported or observed current downstream severe flooding problems. Downstream Water Quality Problems Requiring Special Attention Type 1 – Bacteria Problems Big Soos Creek has Category 5 Bacteria problems. Refer to the listing at the end of this section. Type 2 – Dissolved Oxygen (DO) Problems Big Soos Creek has Category 5 Dissolved Oxygen problems. Refer to the listing at the end of this section. Type 3 – Temperature Problems Big Soos Creek has Category 2 temperature problems. Refer to the listing at the end of this section. Type 4 – Metals Problems There are no known or reported downstream metals problems. Type 5 – Phosphorous Problems There are no known or reported downstream phosphorous problems. Type 6 – Turbidity Problems There are no known or reported downstream turbidity problems. Core Design, Inc. WANG SHORT PLAT Page 10 Type 7 – High pH Problems Big Soos Creek has Category 2 pH problems. Refer to the listing at the end of this section. Bioassessment There are no known or reported downstream bioassessment problems. Core Design, Inc. WANG SHORT PLAT Page 11 Core Design, Inc. WANG SHORT PLAT Page 12 Drainage Adjustments There are no proposed drainage adjustments. Core Design, Inc. WANG SHORT PLAT Page 13 4 FLOW CONTROL AND WATER QUALITY DESIGN 4.1 Predeveloped Site Hydrology The total project area is approximately 2.200 acres including the frontage improvements in the existing right-of-way. The site is currently developed with one single family residence and a shed along the west side of the property, while the rest of the site is forested. The site currently slopes between 1 and 10 percent to the southeast. There is trace amounts of upstream area tributary to the site as the surrounding properties upslope of the project site have recently been developed and have flow control facilities in place that bypass the project site with their discharge. Historic site conditions are assumed for all existing onsite areas and are modeled as C – Forest. The predeveloped areas are summarized in Table 4-1 below and Figure 4-1 Predeveloped Conditions. Table 4-1 Predeveloped Conditions Areas GROUND COVER AREA (acres) Till-Forest 2.200 Existing Peak Flows Predeveloped peak flow rates from WWHM: Core Design, Inc. WANG SHORT PLAT Page 14 4.2 Developed Site Hydrology Lots 1-7 will utilize basic sheet flow dispersion of impervious area such as driveways, walkways, and patios. The lot areas, roofs, and new public access road will be collected and tight-lined to the proposed detention vault located in a tract at the east end of the site. Table 4-2 below breaks down the impervious and pervious surface areas in the tributary developed basin. Table 4-2 Developed Condition Areas Lot Total Area Land Use Area Max. Impervious by Code (50%) Effective Impervious* Pervious (Grass) sf acre sf acre sf acre sf acre 1 9,975 0.229 4,988 0.114 4,000 0.092 5,975 0.137 2 9,002 0.207 4,501 0.103 4,000 0.092 5,002 0.115 3 9,006 0.207 4,503 0.103 4,000 0.092 5,006 0.115 4 9,002 0.207 4,501 0.103 4,000 0.092 5,002 0.115 5 9,001 0.207 4,501 0.103 4,000 0.092 5,001 0.115 6 9,000 0.207 4,500 0.103 4,000 0.092 5,000 0.115 7 9,186 0.211 4,593 0.105 4,000 0.092 5,186 0.119 ROW 14,955 0.343 - - 14,500 0.333 455 0.010 Tract A 9,155 0.210 - - 300 0.007 8,855 0.203 Tract B 870 0.020 - - 0 0.000 870 0.020 Frontage 6,650 0.153 - - 5,101 0.117 1,549 0.036 Total 95,802 2.200 - - 47,901 1.100 47,901 1.100 *Effective Impervious Area = 4,000 sf or maximum impervious coverage allowed by code (50%), whichever is less (per section 3.2 of the CRSWDM). Therefore, the impervious area draining to the vault in Table 4-2 above is 47,901 square feet, or 0.999 acres. The pervious area draining to the vault is the remaining 1.029 acres of the total tributary area. Developed Peak Flows Developed peak flow rates from WWHM: 116TH AVENUE SE SE 189TH PLACESE 191ST STREET117TH PLACE SE EXISTING (PRE-DEVELOPED) BASIN2.200 AC425.885.7877 Fax 425.885.7963Bellevue, Washington 9800714711 NE 29th Place Suite 101E N G I N E E R I N G P L A N N I N G S U R V E Y I N GNGISEDRECOMMENDEDFOR APPROVALPROJECT NO. 16114T 116TH AVENUE SE SE 189TH PLACESE 191ST STREET117TH PLACE SE 1ROW247536TRACT ADEVELOPED BASIN2.200 ACPROJECT NO. 17150A5-17-2019DESIGN12100 NE 195th St, Suite 300 Bothell, Washington 98011 425.885.7877CIVIL ENGINEERINGLANDSCAPE ARCHITECTUREPLANNINGSURVEYINGIN COMPLIANCE WITH CITY OF RENTON STANDARDSC-18006462PR-18000200 LUA:18-000280 TED-40-4044 Core Design, Inc. WANG SHORT PLAT Page 17 4.3 Performance Standards All stormwater facilities are designed in accordance with the 2017 CRSWDM with the flow control duration standard matching forested conditions. The proposed water quality treatment system meets the requirements from the Basic Water Quality Protection Menu. Flow Control: Duration Standard Matching Forested Conditions The Duration Standard matching forested conditions requires maintaining the durations of high flows at their pre-development levels for all flows greater than one-half of the 2-year peak flow through the 50- year peak flow. The pre-development peak flow rates for the 2-year and 10-year runoff events must also be maintained under this requirement. Conveyance Capacity: The proposed conveyance system is designed with sufficient capacity to convey and contain the 25-year peak flow as determined by the Rational Method. The 100-year peak flow will not create or aggravate a severe flooding or erosion problem per Section 1.2.2. If the system were to flood, it would result in water flowing down the curb and gutter in the existing roadway. Water Quality: Basic Water Quality Menu The Basic Water Quality Menu includes one pollutant removal targets: • Total Suspended Solids = 80% reduction The Basic Water Quality Menu, described in detail in Section 6.1.1 of the 2017 CRSWDM (page 6-5), provides eight options to meet the pollutant removal targets listed above. • Option 1: Biofiltration Swale • Option 2: Filter Strip • Option 3: Wetpond • Option 4: Wetvault • Option 5: Stormwater Wetland • Option 6: Combined Detention and Wetpool Facilities • Option 7: Sand Filter • Option 8: StormFilter The project proposes to apply Option 4, a Wetvault. More detailed discussion and sizing calculations of the flow control and water quality treatment facility proposed for this project follows later in this section. More detailed discussion and preliminary sizing calculations of the flow control and water quality treatment facility proposed for this project follows later in this section. Core Design, Inc. WANG SHORT PLAT Page 18 4.4 Flow Control System Calculation of Lot Impervious Area The impervious area per lot applied to the developed basin time series file was determined using the criteria in the 2017 CRSWDM. The proposed development is urban residential. The site is zoned R-4 (see parcel information in Appendix A). The minimum impervious area per lot per the 2017 CRSWDM (page 3-24) would either be 4,000 square feet or the maximum impervious area based on zoning, whichever is less. The maximum impervious surface allowed in the R-4, zone in the City of Renton, is 50%. Small Lot BMP Requirements If the proposed project is on a site/lot smaller than 22,000 square feet, then flow control BMPs must be applied as specified in the requirements below or the project must demonstrate compliance with the LID Performance Standard using an approved continuous runoff model. This project is not in compliance with the LID performance standard and has evaluated the following BMPs in order of precedence: 1.Full Dispersion – A native flowpath of 100 feet and no steeper than 20% per the requirements of Appendix C, Section C2.1.1 cannot be met so full dispersion is infeasible. The project site is also located in an erosion and landslide hazard area. 2.Full Infiltration of Roof Runoff – Full infiltration is not feasible because of the soils low infiltration capacity. 3.All target surfaces not mitigated by requirements 1 and 2 above, must be mitigated to the maximum extent feasible using one or more of the BMPs from the following list: •Full and limited infiltration are not feasible, per the geotechnical engineer. 4.All target surfaces not mitigated by requirements 1, 2 and 3 above, must be mitigated to the maximum extent feasible using basic dispersion. Basic dispersion is proposed for the driveways and walkway/patio areas. If there is adequate flowpath, splash blocks may be used for roof downspouts, but this will be determined during the building permit phase. However, no flow control credit is assumed for basic dispersion. 5.BMPs must be implemented, at a minimum for an impervious area equal to at least 10% of the site/lot for site/lots up to 11,000 square feet and at least 20% of the site/lot for site/lot sizes between 11,000 and 22,000 square feet. If these minimum areas are not mitigated using feasible BMPs from Requirements 1, 2, 3 and 4 above either a fee in lieu of the required minimum BMPs must be paid (requires that the City has established a program for determining and utilizing the fees for stormwater focused retrofit projects) or one or more of the BMPs from the following list are required to be implemented to achieve compliance. Core Design, Inc. WANG SHORT PLAT Page 19 •Reduced Impervious Surface Credit – A reduced impervious surface credit will be applied to the remaining area not covered by basic dispersion to meet the minimum 10 percent lot BMP area. •Native Grown Protection Credit – It is not anticipated that a native growth protection credit will be used. •Tree Retention Credit – Although several trees are being retained, there is no credit taken into account for flow control. 6.The soil moisture capacity of new pervious surfaces must be protected in accordance with the City’s standards. The soil moisture capacity of the developed pervious surfaces will be protected per the City’s standards. 7.Any proposed connection of roof downspouts to the local drainage system must be via a perforated pipe connection. Flow Control WWHM detention modeling resulted in a required vault size of 114’ long x 41.75’ wide x 4.85’ deep, with a total required live storage volume of 23,083 cubic feet. The proposed vault is 0.25’ wider and provides 23,221 cubic feet of storage. The detention vault will be located in Tract A at the east end of the site. The detention vault summary is located below and the full report has been included in Appendix C. WWHM Vault Calculation The proposed detention vault includes a three-orifice and one weir control structure. The first orifice is 15/16 inches in diameter and is located in the plate at the bottom of the riser. The second orifice is 2.65 feet above the outlet and is 13/16 inches in diameter. The third orifice is 3.1 feet above the outlet and is 1-inch in diameter. The rectangular weir is 1/8 inch wide and extends 1.2 feet down from the top of the Core Design, Inc. WANG SHORT PLAT Page 20 riser. The 100-year, 15-minute developed flow rate tributary to the vault is 1.34 cfs. Using Figure 5.1.4.H of the 2017 CRSWDM, the head required to pass this 100-year emergency overflow assuming all the orifices are plugged is 0.25’ resulting in a maximum water surface elevation of 507.10’. The full WWHM vault modeling output report is included in Appendix C. The vault will discharge to the existing conveyance system in SE 191st Street at the southeast corner of the project site. Core Design, Inc. WANG SHORT PLAT Page 21 4.5 Water Quality Calculations Option 4 of the Basic Water Quality Protection Menu is a wetvault. Wetvault Wetvaults are sized with a volume equal to the 91% treatment volume and meets the Basic Water Quality goal of 80% TSS removal. The WWHM modeling results below show that the required water quality treatment volume is 6,703 cubic feet. The proposed water quality/dead storage volume of the detention vault below the live storage is 9,576 cubic feet (2,394 square feet at a depth of 4 feet). Core Design, Inc. WANG SHORT PLAT Page 22 5 CONVEYANCE SYSTEM ANALYSIS AND DESIGN The onsite conveyance system has been analyzed using a backwater spreadsheet, Figure 4.2.1.H and the requirements described in Chapter 4 of the 2017 CRSWDM. Refer to Figure 5-1: Catch Basin Tributary Areas located at the end of this Section to aid in the following discussion and the conveyance calculations. A composite runoff coefficient “C” value of 0.57 was calculated for the site, with 1.100 acres of lawn/landscaping (0.25) and 1.100 acres of pavements and roofs (0.90). Due to the urban nature of this project, the minimum Tc of 6.3 minutes was used and the actual time of concentration was not calculated. The onsite conveyance system is designed with the tailwater elevation set at the 25-year water surface elevation of the proposed vault. All conveyance systems are designed to safely convey the 25-year storm event per Core Requirement #4 in the 2017 CRSWDM. Please refer to the conveyance and backwater spreadsheets included in the following pages. 4753612116TH AVENUE SE ROAD ACB 60.921 ACCB 50.479 ACCB 40.365 ACCB 3 0.124 ACCB 5A0.045 ACCB 6A0.089 ACCB 70.053 ACCB 80.061 AC CB 100.049 ACCB 90.014 ACPROJECT NO. 17150A5-17-2019DESIGN12100 NE 195th St, Suite 300 Bothell, Washington 98011 425.885.7877CIVIL ENGINEERINGLANDSCAPE ARCHITECTUREPLANNINGSURVEYINGIN COMPLIANCE WITH CITY OF RENTON STANDARDSC-18006462PR-18000200 LUA:18-000280 TED-40-4044 LOCATION / DESIGN STORM YEAR:JOB NAME: Wang Short Plat JOB NUMBER: 17150A PREPARED BY: PJLINCREMENTAL RUNOFF EFFECTIVE TIME OF RAINFALL TRIBUTARY PIPE PIPE PIPE ACTUAL TRAVELPIPE CAPACITY SUMMARYPIPE SEGMENT AREA COEFFICIENT AREA SUM OF CONC. INTENSITY FLOW MANNING'S DIAMETER SLOPE LENGTH VELOCITY TIME Q(FULL) V(FULL) Q(ACT)/Q(FULL)FROM TO (ACRES) "C" (A * C) (A * C) (MINUTES) (IN/HR) (CFS) "n" (INCHES) (PERCENT) (FEET) (FT/SEC) (MINUTES) (CFS) (FT/SEC) (PERCENT) CB10 CB9 0.0490.58 0.028 0.028 6.30 2.55 0.072 0.012 12 0.560 18 1.40 0.21 2.888 3.68 2.5%CB9 CB8 0.0140.58 0.008 0.036 6.51 2.51 0.091 0.012 12 0.810 74 1.68 0.73 3.474 4.42 2.6%CB8 CB7 0.0610.58 0.035 0.071 7.25 2.37 0.169 0.012 12 1.370 51 2.47 0.34 4.518 5.75 3.7%CB7 CB6 0.0530.58 0.030 0.102 7.59 2.31 0.235 0.012 12 3.800 250 4.12 1.01 7.524 9.58 3.1%CB6 CB5 0.9210.58 0.530 0.683 8.60 2.16 1.474 0.012 12 1.430 161 5.11 0.52 4.616 5.88 31.9%CB5 CB4 0.4790.58 0.275 0.984 9.13 2.09 2.058 0.012 12 2.240 67 6.62 0.17 5.777 7.36 35.6%CB4 VAULT 0.3650.58 0.210 1.265 9.30 2.07 2.620 0.012 15 4.590 49 8.86 0.09 14.993 12.22 17.5%CB6A CB60.089 0.58 0.051 0.051 6.30 2.55 0.131 0.012 12 2.780 18 12.75 0.02 6.435 8.19 2.0%CB5A CB50.045 0.58 0.026 0.026 6.30 2.55 0.066 0.012 12 0.830 18 12.75 0.02 3.516 4.48 1.9%CB3 CB4 0.124 0.58 0.071 0.071 6.30 2.55 0.182 0.012 12 0.550 91 12.75 0.12 2.862 3.64 6.4%STORM CONVEYANCE SYSTEM DESIGNSEATTLE / 25 YEAR5/9/2019 CORE DESIGN, INC. PAGE 1 BACKWATER CALCULATIONS PROJECT NAME: Wang Short PlatPREPARED BY:PJL PROJECT NUMBER: 17150ADESIGN STORM:25 YEARENTRANCE ENTRANCE EXIT OUTLET INLET APPROACH BEND JUNCTIONPIPE PIPE MANNING'S OUTLET INLET PIPE FULL VELOCITY TAILWATER FRICTION HGL HEAD HEAD CONTROL CONTROL VELOCITY HEAD HEAD HEADWATER RIMFROM TO Q LENGTH SIZE "n" ELEVATION ELEVATION AREA VELOCITY HEAD ELEVATIONLOSS ELEVATION LOSS LOSS ELEVATION ELEVATION HEAD LOSS LOSS ELEVATION ELEVATION FREEBOARDCB CB (CFS) (FT) (IN) VALUE (FT) (FT) (SQ FT) (FT/SEC) (FT) (FT) (FT) (FT) (FT) (FT) (FT) (FT) (FT) (FT) (FT) (FT) (FT) (FT)CB4 VAULT 2.62 49 15 0.012 500.00 502.501.23 2.14 0.07 506.65 0.07 506.72 0.04 0.07 506.82 503.75 0.11 0.03 0.01 506.75 507.35 0.60CB5 CB4 2.06 67 12 0.012 502.50 504.00 0.79 2.62 0.11 506.75 0.19 506.94 0.050.11 507.10 505.00 0.05 0.02 0.00 507.07 508.32 1.25CB6 CB5 1.47 161 12 0.012 504.00 506.30 0.79 1.88 0.05 507.07 0.23 507.30 0.03 0.05 507.38 507.30 0.00 0.00 0.02 507.40 510.44 3.04CB7 CB6 0.24 250 12 0.012 506.30 515.80 0.79 0.30 0.00 507.40 0.01 516.80 0.00 0.00 516.80 516.80 0.00 0.00 0.00 516.80 519.89 3.09CB8 CB7 0.17 51 12 0.012 515.80 516.50 0.79 0.22 0.00 516.80 0.00 517.50 0.000.00 517.50 517.50 0.00 0.00 0.00 517.50 521.16 3.66CB9 CB8 0.09 74 12 0.012 516.50 517.10 0.79 0.12 0.00 517.50 0.00 518.10 0.000.00 518.10 518.10 0.00 0.00 0.00 518.10 521.46 3.36CB10 CB9 0.07 18 12 0.012 517.10 517.20 0.79 0.09 0.00 518.10 0.00 518.20 0.00 0.00 518.20 518.20 0.00 0.00 0.00 518.20 521.24 3.04CB3 CB4 0.18 91 12 0.012 502.50 503.00 0.79 0.23 0.00 506.75 0.00 506.75 0.000.00 506.75 504.00 0.00 0.00 0.00 506.75 506.96 0.21CB5A CB5 0.07 18 12 0.012 504.00 504.15 0.79 0.08 0.00 507.07 0.00 507.07 0.00 0.00 507.07 505.15 0.00 0.00 0.00 507.07 508.32 1.25CB6A CB6 0.13 18 12 0.012 506.30 506.80 0.79 0.17 0.00 507.40 0.00 507.80 0.00 0.00 507.80 507.80 0.00 0.00 0.00 507.80 510.64 2.84PIPESEGMENT Core Design, Inc. WANG SHORT PLAT Page 26 6 SPECIAL REPORTS AND STUDIES Geotechnical Report Prepared by: Theodore Schepper, P.E. Dated: February 26, 2018 Terra Associates, Inc. 12220 113th Avenue NE, Ste. 130 Kirkland, WA 98034 Arborist DRAFT Report Prepared by: Favero Greenforest Dated: February 12, 2018 Greenforest Incorporated 4547 South Lucile Street Seattle, WA 98118 Greenforest Incorporated C o n s u l t i n g A r b o r i s t 4547 South Lucile Street, Seattle, WA 98118 Tel. 206-723-0656 TO: Jane Wang REFERENCE: Arborist Report SITE ADDRESS: 19016 116th Ave SE Renton, WA 98058 DATE: March 22, 2018 PREPARED BY: Favero Greenforest, ISA Certified Arborist # PN -0143A ISA Tree Risk Assessment Qualified ASCA Registered Consulting Arborist® #379 Introduction You contacted me and contracted my services as a consulting arborist. My assignment is to inspect the regulated trees at the above referenced site. The purpose of this report is to establish the condition of the significant trees to satisfy City of Renton permit submittal requirements. I received a topographic survey from Core Design. I visited the site 10/11/2017and visually inspected the trees indicated on the attached survey, which are the subject of this report. Summary: The following table summarizes the tree quantities and categories inventoried in this report. Significant, Landmark and Dangerous categories are defined by municipal code. Total Significant Trees On Site 58 Landmark Trees On Site 0 Dangerous Trees On Site 21 (Proposed) ROW Trees 12 Offsite Trees 1 Jane Wang RE: Arborist Report, 19016 116th Ave SE Renton, WA 98058 March 22, 2018 Page 2 of 16 Greenforest Registered Consulting Arborist Data for 1 offsite tree (#8136) is also included in this report. The site is relatively flat. A single-family residence is located at the west of the parcel, near 116th Ave SE. A handful of native conifers and fruit trees surround the house. The remaining portion is covered in native growth deciduous trees, and a mix of invasive brambles and understory shrubs. Very few of these deciduous trees are healthy: most are in an obvious state of decline and failure. Additionally, though the site looks heavily forested, most trees are too small, and are not of a regulated size. LIMITATIONS AND USE OF THIS REPORT This tree report establishes, via the most practical means available, the existing conditions of the trees on the subject property. Ratings for health and structure, as well as any recommendations are valid only through the development and construction process. This report is based solely on what is readily visible and observable, without any invasive means. There are several conditions that can affect a tree’s condition that may be pre-existing and unable to be ascertained with a visual-only analysis. No attempt was made to determine the presence of hidden or concealed conditions which may contribute to the risk or failure potential of trees on the site. These conditions include root and stem (trunk) rot, internal cracks, structural defects or construction damage to roots, which may be hidden beneath the soil. Additionally, construction and post-construction circumstances can cause a relatively rapid deterioration of a tree’s condition. IDENTIFICATION SCHEME Each tree was marked with a 1” x 3.5” aluminum tag indicating tree number as listed on the attached inventory, and as shown on the attached exhibit. SPECIES AND SIZE OF EACH TREE I measured the trunk diameters (54” from grade) of each tree, and identified each tree by common name. REASON(S) FOR ANY TREE REMOVAL I rated the health and structure/form of each tree (see attached inventory and description below). Trees with significant visible problems or defects are indicated as Dangerous and are not viable for retention (dead, terminally diseased, damaged, or otherwise dangerous to persons or property). Jane Wang RE: Arborist Report, 19016 116th Ave SE Renton, WA 98058 March 22, 2018 Page 3 of 16 Greenforest Registered Consulting Arborist TREE INSPECTION METHOD – TREE HEALTH, CONDITION AND VIABILITY I visually inspected each tree from the ground. I performed a Level 1 risk assessment.1 This is the standard assessment for populations of trees near specified targets, conducted in order to identify obvious defects or specified conditions such as a pre-development inventory. This is a limited visual assessment focuses on identifying trees with imminent and/or probable likelihood of failure, and/or other visible conditions that will affect tree retention. I recorded tree species and size (DBH). I estimated the average dripline of each tree. I rated the condition of each tree, both health and structure. A tree’s structure is distinct from its health. This inspection identifies what is visible with both. High-risk trees can appear healthy in that they can have a dense, green canopy. This may occur when there is sufficient sapwood or adventitious roots present to maintain tree health, but inadequate strength for structural support. Conversely, trees in poor health may or may not be structurally stable. For example, tree decline due to root disease is likely to cause the tree to be structurally unstable, while decline due to drought or insect attack may not. One way that tree health and structure are linked is that healthy trees are more capable of compensating for structural defects. A healthy tree can develop adaptive growth that adds strength to parts weakened by decay, cracks, and wounds. This report identifies unhealthy trees based on existing health conditions and tree structure, and specifies which trees are most suitable for preservation.2 No invasive procedures were performed on any trees. The results of this inspection are based on what was visible at the time of the inspection. The attached tree inventory contains the following information on each tree. Proposed Action indicates if the tree is proposed for retention or removal. Retention Priority indicates if tree is Landmark, >60’ tall, part of a continuous canopy, >18” DBH, or is non-native. Tree Category as defined by municipal code. (TREE: A woody perennial usually 1 Companion publication to the ANSI A300 Part 9: Tree Shrub and Other woody Plant Management – Standard Practices, Tree Risk Assessment. 2011. ISA. 2 Companion publication to the ANSI A300 Part 5: Tree Shrub and Other woody Plant Maintenance – Standard Practices, Managing Trees During Construction. 2008. ISA. Jane Wang RE: Arborist Report, 19016 116th Ave SE Renton, WA 98058 March 22, 2018 Page 4 of 16 Greenforest Registered Consulting Arborist having one dominant trunk, or, for certain species, a multi-stemmed trunk system, with a potential minimum height of ten feet (10') at maturity. Any trees listed on the Complete King County Weed List shall not qualify as a tree.) Dangerous: Any tree that has been certified, in a written report, as dead, terminally diseased, damaged, or otherwise dangerous to persons or property by a licensed landscape architect, or certified arborist. Landmark: A tree with a caliper of thirty inches (30") or greater. (Multiple- stemmed trees are reported as the average using a single integer.) Significant: A tree with a caliper of at least six inches (6"), or an alder or cottonwood tree with a caliper of at least eight inches (8"). Trees qualified as dangerous shall not be considered significant. Trees planted within the most recent ten (10) years shall qualify as significant trees, regardless of the actual caliper. Trees within the right-of-way (and proposed ROW) are not categorized. There are no landmark trees on the project site. Tree number as shown on the attached site exhibit. DBH Stem (trunk) diameter in inches 4.5 feet from grade. Tree Species Common name. Dripline Average branch extension in feet as radius from the trunk. Health & Structure Rating ‘1’ indicates good to excellent condition; no visible health- related problems or structural defects; ‘2’ indicates fair condition; minor visible problems or defects that may require attention or maintenance if the tree is retained, and/or the tree should only remain as a grove tree, and not stand alone; and ‘3’ indicates poor condition; significant visible problems or defects and tree removal is recommended. Visible Defects Obvious structural defects or diseases visible at time of inspection, including: Asymmetric canopy– the tree has an asymmetric canopy from space and light competition from adjacent trees. Branch dieback - mature branches in canopy are dying/dead. Crack – separation of wood fibers and predisposed to failure. Dead – tree is dead. Deadwood – large and/or multiple dead branches throughout canopy. Decay – process of wood degradation by microorganisms resulting in weak and defective structure. Diseased – foliage and trunk/stems are diseased. Jane Wang RE: Arborist Report, 19016 116th Ave SE Renton, WA 98058 March 22, 2018 Page 5 of 16 Greenforest Registered Consulting Arborist Dogleg in trunk – trunk with a bow or defective bend (90°) in trunk often half way of further up the trunk. Double leader – the tree has multiple stem attachments, which may require maintenance or monitoring over time. Included bark – an inclusion of bark at the attachment of multiple leaders and is preventing a wood-to-wood attachment Ivy - dense ivy prevents a thorough inspection, and other defects may be present. Multiple leaders - the tree has multiple stem attachments, which may lead to tree failure and require maintenance or monitoring over time. Previous failure – tree trunk previously broken and defective. Slender – tree lacks adequate trunk taper to stand lone. Sweep in trunk – characterized by a leaning lower trunk and a more upright top. Suppressed – tree crowded by larger adjacent trees; with defective structure and/or low vigor. Retain tree only as a grove tree, not stand-alone. Sweep – tree leans away from adjacent trees. Characterized by a leaning lower trunk and a top that is more upright. Topped – the tree is previously topped and has poor structure and/or stem decay. Type indicates if tree is Deciduous (D) or Evergreen (E). Viability - a determination by the arborist whether the tree is viable for retention. LIMITS OF DISTURBANCE Limits of Disturbance (LOD) are calculated for all the retained significant trees (and for trees on adjoining parcels with overhanging driplines). They are listed below as radii in feet from the trunk for the side of the tree to be impacted by construction. They are determined using rootplate 3 and trunk diameter,4,5 and ISA Best Management Practices.6 These are the minimum distances from the trees for any soil disturbance, and represent the area to be protected during construction. These LOD are malleable and may be adjusted during the design and construction process. The following table lists the limits of disturbance of each tree. 3 Coder, Kim D. 2005. Tree Biomechanics Series. University of Georgia School of Forest Resources. 4 Smiley, E. Thomas, Ph. D. Assessing the Failure Potential of Tree Roots, Shade Tree Technical Report. Bartlett Tree Research Laboratories. 5 Fite, Kelby and E. Thomas Smiley. 2009. Managing Trees During construction; Part Two. Arborist News. ISA. 6 Companion publication to the ANSI A300 Series, Part 5: Managing Trees During Construction. 2008. ISA. Jane Wang RE: Arborist Report, 19016 116th Ave SE Renton, WA 98058 March 22, 2018 Page 6 of 16 Greenforest Registered Consulting Arborist Limits of Disturbance in feet as radius from tree trunk. Limits of Disturbance Tree No. DBH Tree Species DL North East South West 8123 16” Western red-cedar 12’ 10’ 10’ 10’ PL 8124 13” Douglas-fir 14’ 8’ 8’ 8’ PL 8125 13” Western red-cedar 12’ 8’ 8’ 8’ PL 8197 18” Black cottonwood 18’ PL 10’ 10’ 10’ G 8” Black cottonwood 10’ 8’ 8’ 8’ 8’ H 10” Black cottonwood 11’ PL 8’ 8’ 8’ K 11” Bigleaf maple 14’ PL 8’ 8’ 8’ Y 29” Black cottonwood 20’ PL 16’ 16’ 16’ GG 10” Black cottonwood 12’ PL 8’ 8’ 8’ The attached Tree Retention Plan provides protection that exceeds these established LOD. Protective fencing is erected at the tree’s dripline, which is a greater distance for all retained trees. SUPPLEMENTAL TREES Supplemental trees are required and will include 32 three-inch caliper trees. Replacement Are shown on the attached Preliminary Landscape Plan. TREE RETENTION AND LAND CLEARING REGULATIONS 4.4.130 §H.9. Protection Measures During Construction: Protection measures in this subsection shall apply for all trees that are to be retained. All of the following tree protection measures shall apply: a. Construction Storage Prohibited: The applicant may not fill, excavate, stack or store any equipment, dispose of any materials, supplies or fluids, operate any equipment, install impervious surfaces, or compact the earth in any way within the area defined by the drip line of any tree to be retained. b. Fenced Protection Area Required: Prior to development activities, the applicant shall erect and maintain six-foot (6') high chain link temporary construction fencing around the drip lines of all retained trees or at a distance surrounding the tree equal to one and one-quarter feet (1.25') for every one inch (1") of trunk caliper, whichever is greater, or along the perimeter of a tree protection tract. Placards shall be placed on fencing every fifty feet (50') indicating the words, “NO TRESPASSING – Protected Trees,” or on each side of the fencing if less than fifty feet (50'). Site access to individually protected trees or groups of trees shall be fenced and signed. Individual trees shall be fenced on four (4) sides. In addition, the applicant shall provide supervision whenever equipment or trucks are moving near trees. Jane Wang RE: Arborist Report, 19016 116th Ave SE Renton, WA 98058 March 22, 2018 Page 7 of 16 Greenforest Registered Consulting Arborist c. Protection from Grade Changes: If the grade level adjoining to a tree to be retained is to be raised, the applicant shall construct a dry rock wall or rock well around the tree. The diameter of this wall or well must be equal to the tree’s drip line. d. Impervious Surfaces Prohibited within the Drip Line: The applicant may not install impervious surface material within the area defined by the drip line of any tree to be retained. e. Restrictions on Grading within the Drip Lines of Retained Trees: The grade level around any tree to be retained may not be lowered within the greater of the following areas: (i) the area defined by the drip line of the tree, or (ii) an area around the tree equal to one and one-half feet (1-1/2') in diameter for each one inch (1") of tree caliper. A larger tree protection zone based on tree size, species, soil, or other conditions may be required. (Ord. 5676, 12-3-2012) f. Mulch Layer Required: All areas within the required fencing shall be covered completely and evenly with a minimum of three inches (3") of bark mulch prior to installation of the protective fencing. Exceptions may be approved if the mulch will adversely affect protected ground cover plants. (Ord. 5676, 12-3-2012) g. Monitoring Required during Construction: The applicant shall retain a certified arborist or licensed landscape architect to ensure trees are protected from development activities and/or to prune branches and roots, fertilize, and water as appropriate for any trees and ground cover that are to be retained. h. Alternative Protection: Alternative safeguards may be used if determined to provide equal or greater tree protection. (Ord. 5676, 12-3-2012) Attachments: 1. Assumptions and Limiting Conditions 2. Certification of Performance 3. Significant Tree Inventory 4. Tree Retention Plan 5. Planting and Maintenance Specifications Jane Wang RE: Arborist Report, 19016 116th Ave SE Renton, WA 98058 March 22, 2018 Page 8 of 16 Greenforest Registered Consulting Arborist Attachment No. 1 - Assumptions & Limiting Conditions 1. A field examination of the site was made 10/112/217. My observations and conclusions are as of that date. 2. Care has been taken to obtain all information from reliable sources. All data has been verified insofar as possible; however, the consultant/arborist can neither guarantee nor be responsible for the accuracy of information provided by others. 3. I am not a qualified land surveyor. Reasonable care was used to match the trees indicated on the sheets with those growing in the field. 4. Construction activities can significantly affect the condition of retained trees. All retained trees should be inspected after construction is completed, and then inspected regularly as part of routine maintenance. 5. Unless stated other wise: 1) information contained in this report covers only those trees that were examined and reflects the condition of those trees at the time of inspection; and 2) the inspection is limited to visual examination of the subject trees without dissection, excavation, probing, or coring. There is no warranty or guarantee, expressed or implied that problems or deficiencies of the subject tree may not arise in the future. 6. All trees possess the risk of failure. Trees can fail at any time, with or without obvious defects, and with or without applied stress. A complete evaluation of the potential for this (a) tree to fail requires excavation and examination of the base of the subject tree. Permission of the current property owner must be obtained before this work can be undertaken and the hazard evaluation completed. 7. The consultant/appraiser shall not be required to give testimony or to attend court by reason of this report unless subsequent contractual arrangements are made. Jane Wang RE: Arborist Report, 19016 116th Ave SE Renton, WA 98058 March 22, 2018 Page 9 of 16 Greenforest Registered Consulting Arborist Attachment No. 2 - Certification of Performance I, Favero Greenforest, certify that: • I have personally inspected the trees and the property referred to in this report and have stated my findings accurately. • I have no current or prospective interest in the vegetation or the property that is the subject of this report and have no personal interest or bias with respect to the parties involved. • The analysis, opinion, and conclusions stated herein are my own and are based on current scientific procedures and facts. • My analysis, opinion, and conclusions were developed and this report has been prepared according to commonly accepted arboricultural practices. • No one provided significant professional assistance to me, except as indicated within the report. • My compensation is not contingent upon the reporting of a predetermined conclusion that favors the cause of the client of any other party nor upon the results of the assessment, the attainment of stipulated results, or the occurrence of any subsequent events. I further certify that I am a member in good standing of International Society of Arboriculture (ISA), and the ISA PNW Chapter, I am an ISA Certified Arborist (#PN-0143A) and am Tree Risk Assessment Qualified, and am a Registered Consulting Arborist® (#379) with American Society of Consulting Arborists. I have worked as an independent consulting arborist since 1989. Signed: GREENFOREST, Inc. By Favero Greenforest, M. S. Date: March 22, 2018 Jane Wang RE: Arborist Report, 19016 116th Ave SE Renton, WA 98058 March 22, 2018 Page 10 of 16 Greenforest Registered Consulting Arborist Attachment No. 3 – Tree Inventory Proposed Action Category Tree No. DBH Species Dripline Health Structure Visible Defects Tree Type Viable Tree RETAIN SIGNIFICANT 8123 16” Western red-cedar 12’ 1 2 Double leader E YES RETAIN SIGNIFICANT 8124 13” Douglas-fir 14’ 1 2 Double leader E YES RETAIN SIGNIFICANT 8125 13” Western red-cedar 12’ 1 1 E YES Remove ROW 8135 26” White pine 17’ 1 2 Multiple leaders E YES Remove Dangerous 8137 8,10” Apple, fruiting 12’ 3 3 Diseased, decay, decline D NO Remove Dangerous 8138 24” Apple, fruiting 14’ 2 3 Diseased, decay, decline D NO Remove Dangerous 8172 22” Red alder 15’ 2 3 Decline, decay, asymmetric D NO Remove Dangerous 8173 10,10,18” Red alder 16’ 2 3 Decline, decay, failure D NO Remove Dangerous 8174 13” Black cottonwood 12’ 3 2 Decline, dead top D NO Remove SIGNIFICANT 8175 20” Black cottonwood 16’ 2 1 Thin canopy D YES Remove SIGNIFICANT 8176 17” Black cottonwood 15’ 1 2 Asymmetric D YES Remove SIGNIFICANT 8177 16” Black cottonwood 15’ 1 1 D YES Remove SIGNIFICANT 8178 22” Black cottonwood 18’ 1 2 Asymmetric D YES Remove SIGNIFICANT 8179 14” Black cottonwood 16’ 1 2 Asymmetric D YES Remove SIGNIFICANT 8180 24” Black cottonwood 20’ 1 2 Ivy D YES Remove ROW 8181 13,14” Black cottonwood 18’ 1 2 Double leader D YES Remove ROW 8182 13,14” Black cottonwood 18’ 1 2 Double leader D YES Remove ROW 8183 30” Black cottonwood 25’ 1 1 D YES Remove ROW 8184 15” Black cottonwood 18’ 1 2 Asymmetric D YES Remove SIGNIFICANT 8187 19” Black cottonwood 18’ 1 1 D YES Remove SIGNIFICANT 8190 16,18” Black cottonwood 16' 1 2 Double leader with included D YES Jane Wang RE: Arborist Report, 19016 116th Ave SE Renton, WA 98058 March 22, 2018 Page 11 of 16 Greenforest Registered Consulting Arborist Proposed Action Category Tree No. DBH Species Dripline Health Structure Visible Defects Tree Type Viable Tree bark Remove SIGNIFICANT 8191 29” Black cottonwood 18’ 1 1 D YES Remove SIGNIFICANT 8192 19” Black cottonwood 16’ 1 1 D YES Remove Dangerous 8193 18” Black cottonwood 16’ 1 3 Decay D NO Remove SIGNIFICANT 8194 22” Black cottonwood 18’ 1 1 D YES Remove SIGNIFICANT 8195 20” Black cottonwood 18’ 1 1 D YES RETAIN SIGNIFICANT 8197 18” Black cottonwood 18’ 1 2 Asymmetric D YES Remove SIGNIFICANT 8198 18” Black cottonwood 16’ 1 1 D YES Remove Dangerous 8199 14” Black cottonwood 16’ 2 3 Suppressed, asymmetric D NO Remove SIGNIFICANT 8200 20,12” Black cottonwood 16’ 1 2 Double leader D YES Remove SIGNIFICANT 8201 28” Black cottonwood 20’ 1 2 Asymmetric D YES Remove Dangerous 8202 14” Black cottonwood 16’ 1 3 Crack D NO Remove SIGNIFICANT 8203 18” Black cottonwood 18’ 1 1 D YES Remove SIGNIFICANT 8204 16” Black cottonwood 15’ 1 2 Asymmetric D YES Remove SIGNIFICANT 8205 17” Black cottonwood 18’ 1 2 Asymmetric D YES Remove SIGNIFICANT 8207 14” Black cottonwood 16’ 1 2 Asymmetric D YES Remove SIGNIFICANT 8208 20” Black cottonwood 16’ 1 1 D YES Remove SIGNIFICANT 8209 16” Black cottonwood 14’ 1 1 D YES Remove SIGNIFICANT 8210 20” Black cottonwood 18’ 2 1 Thin canopy D YES Remove SIGNIFICANT 8211 22” Black cottonwood 20’ 1 1 D YES Remove SIGNIFICANT 8212 26” Black cottonwood 20’ 1 1 D YES Remove SIGNIFICANT 8213 18” Black cottonwood 16’ 1 1 D YES Remove SIGNIFICANT 8214 17” Black cottonwood 16’ 1 2 Asymmetric D YES Jane Wang RE: Arborist Report, 19016 116th Ave SE Renton, WA 98058 March 22, 2018 Page 12 of 16 Greenforest Registered Consulting Arborist Proposed Action Category Tree No. DBH Species Dripline Health Structure Visible Defects Tree Type Viable Tree Remove SIGNIFICANT 8215 22” Black cottonwood 16’ 1 1 D YES Remove ROW 8216 14” Black cottonwood 16’ 1 2 Asymmetric D YES Remove ROW 8217 17” Black cottonwood 18’ 1 2 Asymmetric D YES Remove ROW 8218 16” Black cottonwood 16’ 1 2 Asymmetric D YES Remove ROW 8219 20” Black cottonwood 18’ 1 1 D YES Remove ROW 8220 18” Black cottonwood 20’ 1 2 Dogleg D YES Remove SIGNIFICANT 8221 12” Black cottonwood 14’ 1 2 Previous top failure D YES Remove SIGNIFICANT 8222 15” Black cottonwood 16’ 1 1 D YES Remove SIGNIFICANT 8223 22” Black cottonwood 16’ 1 1 D YES Remove SIGNIFICANT 8224 20” Black cottonwood 18’ 1 1 D YES Remove Dangerous 8230 12” Red alder 16’ 2 3 Decline, top failure, double leader D NO Remove Dangerous 8231 22,22,24” Bigleaf maple 35’ 2 3 Diseased, decay, decline D NO Remove SIGNIFICANT A 9” Bigleaf maple 14’ 1 2 Asymmetric D YES Remove SIGNIFICANT B 16” Black cottonwood 14’ 1 2 Asymmetric D YES Remove SIGNIFICANT C 12” Black cottonwood 10’ 1 2 Asymmetric D YES Remove SIGNIFICANT D 16” Black cottonwood 13’ 1 2 Asymmetric D YES Remove SIGNIFICANT E 9” Black cottonwood 10’ 1 2 Asymmetric D YES Remove SIGNIFICANT F 10” Black cottonwood 12’ 1 2 Asymmetric D YES RETAIN SIGNIFICANT G 8” Black cottonwood 10’ 1 2 Asymmetric D YES RETAIN SIGNIFICANT H 10” Black cottonwood 11’ 1 2 Asymmetric D YES Remove SIGNIFICANT I 10” Black cottonwood 14’ 1 2 Asymmetric D YES Remove SIGNIFICANT J 6” Cascara 10’ 1 1 D YES Jane Wang RE: Arborist Report, 19016 116th Ave SE Renton, WA 98058 March 22, 2018 Page 13 of 16 Greenforest Registered Consulting Arborist Proposed Action Category Tree No. DBH Species Dripline Health Structure Visible Defects Tree Type Viable Tree RETAIN SIGNIFICANT K 11” Bigleaf maple 14’ 1 2 Slender D YES Remove SIGNIFICANT L 9” Red alder 12’ 1 1 D YES Remove SIGNIFICANT M 9” Black cottonwood 14’ 1 2 Asymmetric D YES Remove Dangerous N 12” Bigleaf maple 16’ 1 3 Topped, sweep D NO Remove Dangerous O 10” Bigleaf maple 10’ 1 3 Topped, sweep D NO Remove Dangerous P 28,26” Bigleaf maple 6’ 3 3 Nearly dead D NO Remove SIGNIFICANT Q 8” Cherry, bitter 12’ 1 1 D YES Remove ROW R 11” Scouler's willow 16’ 2 3 Decay, asymmetric, diseased D NO Remove ROW S 10,13” Black cottonwood 16’ 1 2 Double leader D YES Remove Dangerous T 9” Black cottonwood 14’ 3 3 Diseased, decay, decline D NO Remove SIGNIFICANT U 10” Cherry, bitter 14’ 1 1 D YES Remove Dangerous V 11” Scouler's willow 14’ 3 2 Diseased, deadwood D NO Remove Dangerous W 7,8” Scouler's willow 10’ 3 2 Asymmetric, diseased D NO Remove SIGNIFICANT X 23” Black cottonwood 18’ 1 2 Asymmetric D YES RETAIN SIGNIFICANT Y 29” Black cottonwood 20’ 1 2 Asymmetric D YES Remove Dangerous Z 17” Black cottonwood 0’ 3 3 Dead D NO Remove Dangerous AA 18” Black cottonwood 16’ 1 3 Root failure D NO Remove Dangerous BB 6,6” Scouler's willow 14’ 3 2 Diseased, deadwood D NO Remove Dangerous CC 9” Red alder 14’ 2 3 Top failure, decay D NO Remove Dangerous DD 22,24” Red alder 18’ 2 3 Branch failure, double leader D NO Remove SIGNIFICANT EE 8, 10” Black cottonwood 14’ 1 2 Double leader, decay D YES Jane Wang RE: Arborist Report, 19016 116th Ave SE Renton, WA 98058 March 22, 2018 Page 14 of 16 Greenforest Registered Consulting Arborist Proposed Action Category Tree No. DBH Species Dripline Health Structure Visible Defects Tree Type Viable Tree Remove SIGNIFICANT FF 10” Black cottonwood 14’ 1 2 Asymmetric D YES RETAIN SIGNIFICANT GG 10” Black cottonwood 12’ 1 2 Asymmetric, double leader D YES Remove SIGNIFICANT HH 11” Black cottonwood 14’ 1 1 D YES Remove SIGNIFICANT II 10” Black cottonwood 16’ 1 2 Failure, double leader D YES Remove SIGNIFICANT JJ 10” Black cottonwood 14’ 1 1 D YES OFFSITE TREE’ OFFSITE 8136 24” Douglas-fir 16’ 1 2 Over-pruned by adjoining neighbor X X X X X X X X X XXXXX X X X XX X X X X XX X X X X X XX XX XX X X X X X X XXX X XX X X X X X X X XX XX XX 4'%1//'0&'& (14#22418#. EXISTING TREE TO BE RETAINED (TYP.) 4'%1//'0&'& (14#22418#. Core Design, Inc. WANG SHORT PLAT Page 27 7 OTHER PERMITS Utilities Permit Building Permits ROW Use Permit NPDES Permit Core Design, Inc. WANG SHORT PLAT Page 28 8 ESC ANALYSIS AND DESIGN The site will utilize Appendix D of the 2017 CRSWDM for the erosion and sedimentation control design to reduce the discharge of sediment-laden runoff from the site. Clearing limits will be established prior to any earthwork on the project site. Perimeter protection will be provided by silt fencing along the downstream perimeter of the disturbed areas to limit the downstream transport of sediment to streams, wetlands and neighboring properties. Dust control, if required, will be provided by a water truck. A Certified Erosion and Sediment Control Lead inspector will be present onsite during earthwork activities. The inspector shall determine frequency of watering of the project site and will authorize and direct any additional erosion and sediment control measures as needed during all construction activities. The plan will be comprised of temporary measures (stabilized construction entrance, silt fence, interceptor swales, etc.) as well as permanent measures (detention vaults, hydroseeding, etc.). In general, construction activities will be sequenced such that the permanent detention vault will be constructed and used for temporary erosion and sedimentation control. Runoff from the site will sheet flow across cleared areas into temporary interceptor swales and into temporary pipes that discharge into the permanent detention vault or into the permanent conveyance system, when installed. Although the permanent detention vault will be used as the sediment trap for the project, the minimum sediment trap area was calculated below for the construction site, and compared to the proposed detention vault to verify adequate TESC functionality. A sediment trap will be utilized until the vault is built. The sediment trap area was calculated for the project site using the 10-year storm event with the potential of work during the wet season (October 1 to April 30). The WWHM calculated 10-year, 15- minute time step developed condition peak flow rate used for TESC pond sizing is Q10 = 0.8768 cfs. Sediment Trap Surface Area Calculation Sediment trap minimum surface area, SA, is determined by the following equation: SA = 2080 sf/cfs * (Total Q10-developed) (page D-47, 2017 CRSWDM) Where: SA = minimum TESC pond surface area (sf) Q10-developed = 10-year developed, 15-minute, peak flow (0.8768 cfs) SAmin = 1,824 sf The design surface area of the proposed detention vault = 4,788 sf. Core Design, Inc. WANG SHORT PLAT Page 29 9 BOND QUANTITIES, FACILITY SUMMARIES, AND DECLARATION OF COVENANT 9.1 Bond Quantities The Site Improvement Bond Quantity Worksheet is included in the following pages, and has also been submitted under separate cover. 9.2 Facility Summary Refer to Developed Conditions Exhibit in Section 4 of this report. 9.3 Declaration of Covenant Not applicable. SITE IMPROVEMENT BOND QUANTITY WORKSHEET PROJECT INFORMATION Planning Division 17055 South Grady Way - 6th Floor I Renton, WA 98057 (425) 4i0-7200 enton @ CITY OF Comrnunity & Economic Development Date Prepared 2/s12079 t Select the current project status/phase from the following options: For Approval - Preliminary Data Enclosed, pending approval from the City; For Construction - Estimated Data Enclosed, Plans have been approved for contruction by the City; Proiect Closeout - Final Costs and Quantities Enclosed for Project Close-out Submittal PaBe 1 of 1 Ref 8-H Bond Quantity Worksheet Project Phase 1 Unit Prices Updated: O6h4/2O16 vercioni 04/26/2017 Ptinted 2/5/2OI9 FOR APPROVAL Prepared by: Preston Longoni, P.E ss502 Core Design, lnc 12100 NE 195th St, Suite 300 425.885.7877 pjl @coredesigninc.com Name: PE Registration No: Firm Name: Firm Address: Phone No. Email Address: Engineer Stamp Required (oll cost estimotes must hove original wet stomp i-i 6irl ,7stt,t\o Project location and Description Project Owner lnformation Wang SP Anaiyah Homes, LLC 18-000200 253.245.4454 ########1402 Lake Tapps Parkway SE 19016 116th Ave SE Auburn, WA SE 191st St & 117th Pl SE 6198400125 Garden TRS #4 less E 30 ft Project Name: CED Plan # (LUA): CED Permit # (U): Site Address: Street lntersection Parcel #(s): Abbreviated Legal Description: Project Owner: Phone: Address: Addt'l Project Owner: Phone: Address: Clearing and Grading Utility Providers Clearing Yes/Nor and than or equal to 5,000 board feet of timber? lf Yes, Provide Forest Practice Permit f:N/A Water Service Provided by: Sewer Service Provided by: SECTION I PROJECT INFORMATION CED Permit #:######## UnitReference #Price Unit Quantity CostBackfill & compaction-embankment ESC-1 6.50$ CY Check dams, 4" minus rock ESC-2 SWDM 5.4.6.3 80.00$ Each 22 1,760.00Catch Basin Protection ESC-3 35.50$ Each 15 532.50Crushed surfacing 1 1/4" minus ESC-4 WSDOT 9-03.9(3)95.00$ CY Ditching ESC-5 9.00$ CY Excavation-bulk ESC-6 2.00$ CY 167 334.00Fence, silt ESC-7 SWDM 5.4.3.1 1.50$ LF 1351 2,026.50Fence, Temporary (NGPE)ESC-8 1.50$ LF 489 733.50Geotextile Fabric ESC-9 2.50$ SY 7400 18,500.00Hay Bale Silt Trap ESC-10 0.50$ Each Hydroseeding ESC-11 SWDM 5.4.2.4 0.80$ SY Interceptor Swale / Dike ESC-12 1.00$ LF 1413 1,413.00Jute Mesh ESC-13 SWDM 5.4.2.2 3.50$ SY Level Spreader ESC-14 1.75$ LF Mulch, by hand, straw, 3" deep ESC-15 SWDM 5.4.2.1 2.50$ SY Mulch, by machine, straw, 2" deep ESC-16 SWDM 5.4.2.1 2.00$ SY Piping, temporary, CPP, 6"ESC-17 12.00$ LF Piping, temporary, CPP, 8"ESC-18 14.00$ LF Piping, temporary, CPP, 12"ESC-19 18.00$ LF Plastic covering, 6mm thick, sandbagged ESC-20 SWDM 5.4.2.3 4.00$ SY Rip Rap, machine placed; slopes ESC-21 WSDOT 9-13.1(2)45.00$ CY Rock Construction Entrance, 50'x15'x1'ESC-22 SWDM 5.4.4.1 1,800.00$ Each Rock Construction Entrance, 100'x15'x1'ESC-23 SWDM 5.4.4.1 3,200.00$ Each 1 3,200.00Sediment pond riser assembly ESC-24 SWDM 5.4.5.2 2,200.00$ Each Sediment trap, 5' high berm ESC-25 SWDM 5.4.5.1 19.00$ LF Sed. trap, 5' high, riprapped spillway berm section ESC-26 SWDM 5.4.5.1 70.00$ LF Seeding, by hand ESC-27 SWDM 5.4.2.4 1.00$ SY Sodding, 1" deep, level ground ESC-28 SWDM 5.4.2.5 8.00$ SY Sodding, 1" deep, sloped ground ESC-29 SWDM 5.4.2.5 10.00$ SY TESC Supervisor ESC-30 110.00$ HR 20 2,200.00Water truck, dust control ESC-31 SWDM 5.4.7 140.00$ HR 8 1,120.00UnitReference #Price Unit Quantity Cost EROSION/SEDIMENT SUBTOTAL:31,819.50SALES TAX @ 10%3,181.95EROSION/SEDIMENT TOTAL:35,001.45 (A) SITE IMPROVEMENT BOND QUANTITY WORKSHEET FOR EROSION & SEDIMENT CONTROL Description No.(A) WRITE-IN-ITEMS Page 1 of 1 Ref 8-H Bond Quantity Worksheet SECTION II.a EROSION_CONTROL Unit Prices Updated: 06/14/2016 Version: 04/26/2017 Printed 2/5/2019 CED Permit #:######## Existing Future Public Private Right-of-Way Improvements Improvements (D) (E)Description No. Unit Price Unit Quant.Cost Quant.Cost Quant.Cost Quant.CostGENERAL ITEMS Backfill & Compaction- embankment GI-1 6.00$ CY Backfill & Compaction- trench GI-2 9.00$ CY Clear/Remove Brush, by hand (SY)GI-3 1.00$ SY Bollards - fixed GI-4 240.74$ Each Bollards - removable GI-5 452.34$ Each Clearing/Grubbing/Tree Removal GI-6 10,000.00$ Acre Excavation - bulk GI-7 2.00$ CY 3300 6,600.00Excavation - Trench GI-8 5.00$ CYFencing, cedar, 6' high GI-9 20.00$ LF 440 8,800.00Fencing, chain link, 4'GI-10 38.31$ LFFencing, chain link, vinyl coated, 6' high GI-11 20.00$ LF Fencing, chain link, gate, vinyl coated, 20' GI-12 1,400.00$ Each Fill & compact - common barrow GI-13 25.00$ CY 3300 82,500.00 Fill & compact - gravel base GI-14 27.00$ CY Fill & compact - screened topsoil GI-15 39.00$ CY Gabion, 12" deep, stone filled mesh GI-16 65.00$ SY Gabion, 18" deep, stone filled mesh GI-17 90.00$ SY Gabion, 36" deep, stone filled mesh GI-18 150.00$ SY Grading, fine, by hand GI-19 2.50$ SY Grading, fine, with grader GI-20 2.00$ SYMonuments, 3' Long GI-21 250.00$ Each 3 750.00 1 250.00Sensitive Areas Sign GI-22 7.00$ EachSodding, 1" deep, sloped ground GI-23 8.00$ SY Surveying, line & grade GI-24 850.00$ Day 2 1,700.00 Surveying, lot location/lines GI-25 1,800.00$ Acre Topsoil Type A (imported)GI-26 28.50$ CY Traffic control crew ( 2 flaggers )GI-27 120.00$ HR Trail, 4" chipped wood GI-28 8.00$ SY Trail, 4" crushed cinder GI-29 9.00$ SY Trail, 4" top course GI-30 12.00$ SY Conduit, 2"GI-31 5.00$ LF Wall, retaining, concrete GI-32 55.00$ SFWall, rockery GI-33 15.00$ SF SUBTOTAL THIS PAGE:750.00 250.00 99,600.00 (B)(C)(D)(E) SITE IMPROVEMENT BOND QUANTITY WORKSHEET FOR STREET AND SITE IMPROVEMENTS Quantity Remaining (Bond Reduction) (B)(C) Page 1 of 3 Ref 8-H Bond Quantity Worksheet SECTION II.b TRANSPORTATION Unit Prices Updated: 06/14/2016 Version: 04/26/2017 Printed 2/5/2019 CED Permit #:######## Existing Future Public Private Right-of-Way Improvements Improvements (D) (E)Description No. Unit Price Unit Quant.Cost Quant.Cost Quant.Cost Quant.Cost SITE IMPROVEMENT BOND QUANTITY WORKSHEET FOR STREET AND SITE IMPROVEMENTS Quantity Remaining (Bond Reduction) (B)(C) ROAD IMPROVEMENT/PAVEMENT/SURFACINGAC Grinding, 4' wide machine < 1000sy RI-1 30.00$ SY AC Grinding, 4' wide machine 1000-2000sy RI-2 16.00$ SY AC Grinding, 4' wide machine > 2000sy RI-3 10.00$ SY AC Removal/Disposal RI-4 35.00$ SY Barricade, Type III ( Permanent )RI-5 56.00$ LF Guard Rail RI-6 30.00$ LF Curb & Gutter, rolled RI-7 17.00$ LFCurb & Gutter, vertical RI-8 12.50$ LF 123 1,537.50 603 7,537.50Curb and Gutter, demolition and disposal RI-9 18.00$ LF 45 810.00Curb, extruded asphalt RI-10 5.50$ LFCurb, extruded concrete RI-11 7.00$ LF Sawcut, asphalt, 3" depth RI-12 1.85$ LF 405 749.25 85 157.25 Sawcut, concrete, per 1" depth RI-13 3.00$ LF Sealant, asphalt RI-14 2.00$ LF 405 810.00 Shoulder, gravel, 4" thick RI-15 15.00$ SY Sidewalk, 4" thick RI-16 38.00$ SY 50 1,900.00 390 14,820.00 Sidewalk, 4" thick, demolition and disposal RI-17 32.00$ SY Sidewalk, 5" thick RI-18 41.00$ SY Sidewalk, 5" thick, demolition and disposal RI-19 40.00$ SY Sign, Handicap RI-20 85.00$ EachStriping, per stall RI-21 7.00$ EachStriping, thermoplastic, ( for crosswalk )RI-22 3.00$ SFStriping, 4" reflectorized line RI-23 0.50$ LF Additional 2.5" Crushed Surfacing RI-24 3.60$ SY HMA 1/2" Overlay 1.5" RI-25 14.00$ SY HMA 1/2" Overlay 2"RI-26 18.00$ SY HMA Road, 2", 4" rock, First 2500 SY RI-27 28.00$ SY HMA Road, 2", 4" rock, Qty. over 2500SY RI-28 21.00$ SY HMA Road, 4", 6" rock, First 2500 SY RI-29 45.00$ SY 299 13,455.00 1027 46,215.00 HMA Road, 4", 6" rock, Qty. over 2500 SY RI-30 37.00$ SY HMA Road, 4", 4.5" ATB RI-31 38.00$ SY Gravel Road, 4" rock, First 2500 SY RI-32 15.00$ SYGravel Road, 4" rock, Qty. over 2500 SY RI-33 10.00$ SYThickened Edge RI-34 8.60$ LF SUBTOTAL THIS PAGE:19,261.75 68,572.50 157.25 (B)(C)(D)(E) Page 2 of 3 Ref 8-H Bond Quantity Worksheet SECTION II.b TRANSPORTATION Unit Prices Updated: 06/14/2016 Version: 04/26/2017 Printed 2/5/2019 CED Permit #:######## Existing Future Public Private Right-of-Way Improvements Improvements (D) (E)Description No. Unit Price Unit Quant.Cost Quant.Cost Quant.Cost Quant.Cost SITE IMPROVEMENT BOND QUANTITY WORKSHEET FOR STREET AND SITE IMPROVEMENTS Quantity Remaining (Bond Reduction) (B)(C) PARKING LOT SURFACING No.2" AC, 2" top course rock & 4" borrow PL-1 21.00$ SY 2" AC, 1.5" top course & 2.5" base course PL-2 28.00$ SY 4" select borrow PL-3 5.00$ SY 1.5" top course rock & 2.5" base course PL-4 14.00$ SY SUBTOTAL PARKING LOT SURFACING: (B)(C)(D)(E) LANDSCAPING & VEGETATION No.Street Trees LA-1 Median Landscaping LA-2 Right-of-Way Landscaping LA-3Wetland Landscaping LA-4 SUBTOTAL LANDSCAPING & VEGETATION: (B)(C)(D)(E) TRAFFIC & LIGHTING No.Signs TR-1 150.00$ EA 9 1,350.00Street Light System ( # of Poles)TR-2 2,000.00$ EA 6 12,000.00Traffic Signal TR-3 Traffic Signal Modification TR-4 SUBTOTAL TRAFFIC & LIGHTING:13,350.00 (B)(C)(D)(E) WRITE-IN-ITEMS SUBTOTAL WRITE-IN ITEMS: STREET AND SITE IMPROVEMENTS SUBTOTAL:20,011.75 82,172.50 99,757.25 SALES TAX @ 10%2,001.18 8,217.25 9,975.73 STREET AND SITE IMPROVEMENTS TOTAL:22,012.93 90,389.75 109,732.98 (B)(C)(D)(E) Page 3 of 3 Ref 8-H Bond Quantity Worksheet SECTION II.b TRANSPORTATION Unit Prices Updated: 06/14/2016 Version: 04/26/2017 Printed 2/5/2019 CED Permit #:######## Existing Future Public PrivateRight-of-Way Improvements Improvements (D) (E)Description No. Unit Price Unit Quant.Cost Quant.Cost Quant.Cost Quant.CostDRAINAGE (CPE = Corrugated Polyethylene Pipe, N12 or Equivalent) For Culvert prices, Average of 4' cover was assumed. Assume perforated PVC is same price as solid pipe.) Access Road, R/D D-1 26.00$ SY * (CBs include frame and lid) Beehive D-2 90.00$ EachThrough-curb Inlet Framework D-3 400.00$ EachCB Type I D-4 1,500.00$ Each 4 6,000.00 7 10,500.00CB Type IL D-5 1,750.00$ Each CB Type II, 48" diameter D-6 2,300.00$ Each 1 2,300.00 for additional depth over 4' D-7 480.00$ FTCB Type II, 54" diameter D-8 2,500.00$ Each for additional depth over 4'D-9 495.00$ FTCB Type II, 60" diameter D-10 2,800.00$ Each for additional depth over 4'D-11 600.00$ FT CB Type II, 72" diameter D-12 6,000.00$ Each for additional depth over 4'D-13 850.00$ FTCB Type II, 96" diameter D-14 14,000.00$ Each for additional depth over 4'D-15 925.00$ FT Trash Rack, 12"D-16 350.00$ Each Trash Rack, 15"D-17 410.00$ EachTrash Rack, 18"D-18 480.00$ EachTrash Rack, 21"D-19 550.00$ EachCleanout, PVC, 4"D-20 150.00$ Each Cleanout, PVC, 6"D-21 170.00$ Each 7 1,190.00 Cleanout, PVC, 8"D-22 200.00$ EachCulvert, PVC, 4" D-23 10.00$ LFCulvert, PVC, 6" D-24 13.00$ LF 331 4,303.00Culvert, PVC, 8" D-25 15.00$ LF 12 180.00 Culvert, PVC, 12" D-26 23.00$ LF 180 4,140.00 663 15,249.00 Culvert, PVC, 15" D-27 35.00$ LFCulvert, PVC, 18" D-28 41.00$ LFCulvert, PVC, 24"D-29 56.00$ LFCulvert, PVC, 30" D-30 78.00$ LF Culvert, PVC, 36" D-31 130.00$ LF Culvert, CMP, 8"D-32 19.00$ LFCulvert, CMP, 12"D-33 29.00$ LF SUBTOTAL THIS PAGE:10,140.00 33,722.00 (B)(C)(D)(E) Quantity Remaining (Bond Reduction) (B)(C) SITE IMPROVEMENT BOND QUANTITY WORKSHEET FOR DRAINAGE AND STORMWATER FACILITIES Page 1 of 5 Ref 8-H Bond Quantity Worksheet SECTION II.c DRAINAGE Unit Prices Updated: 06/14/2016 Version: 04/26/2017 Printed 2/5/2019 CED Permit #:######## Existing Future Public PrivateRight-of-Way Improvements Improvements (D) (E)Description No. Unit Price Unit Quant.Cost Quant.Cost Quant.Cost Quant.Cost Quantity Remaining (Bond Reduction) (B)(C) SITE IMPROVEMENT BOND QUANTITY WORKSHEET FOR DRAINAGE AND STORMWATER FACILITIES DRAINAGE (Continued)Culvert, CMP, 15"D-34 35.00$ LF Culvert, CMP, 18"D-35 41.00$ LF Culvert, CMP, 24"D-36 56.00$ LFCulvert, CMP, 30"D-37 78.00$ LFCulvert, CMP, 36"D-38 130.00$ LF Culvert, CMP, 48"D-39 190.00$ LFCulvert, CMP, 60"D-40 270.00$ LFCulvert, CMP, 72"D-41 350.00$ LFCulvert, Concrete, 8"D-42 42.00$ LF Culvert, Concrete, 12"D-43 48.00$ LF Culvert, Concrete, 15"D-44 78.00$ LFCulvert, Concrete, 18"D-45 48.00$ LFCulvert, Concrete, 24"D-46 78.00$ LFCulvert, Concrete, 30"D-47 125.00$ LF Culvert, Concrete, 36"D-48 150.00$ LF Culvert, Concrete, 42"D-49 175.00$ LFCulvert, Concrete, 48"D-50 205.00$ LFCulvert, CPE Triple Wall, 6" D-51 14.00$ LFCulvert, CPE Triple Wall, 8" D-52 16.00$ LF Culvert, CPE Triple Wall, 12" D-53 24.00$ LF Culvert, CPE Triple Wall, 15" D-54 35.00$ LFCulvert, CPE Triple Wall, 18" D-55 41.00$ LFCulvert, CPE Triple Wall, 24" D-56 56.00$ LFCulvert, CPE Triple Wall, 30" D-57 78.00$ LF Culvert, CPE Triple Wall, 36" D-58 130.00$ LF Culvert, LCPE, 6"D-59 60.00$ LFCulvert, LCPE, 8"D-60 72.00$ LFCulvert, LCPE, 12"D-61 84.00$ LFCulvert, LCPE, 15"D-62 96.00$ LF Culvert, LCPE, 18"D-63 108.00$ LF Culvert, LCPE, 24"D-64 120.00$ LFCulvert, LCPE, 30"D-65 132.00$ LFCulvert, LCPE, 36"D-66 144.00$ LFCulvert, LCPE, 48"D-67 156.00$ LF Culvert, LCPE, 54"D-68 168.00$ LF SUBTOTAL THIS PAGE: (B)(C)(D)(E) Page 2 of 5 Ref 8-H Bond Quantity Worksheet SECTION II.c DRAINAGE Unit Prices Updated: 06/14/2016 Version: 04/26/2017 Printed 2/5/2019 CED Permit #:######## Existing Future Public PrivateRight-of-Way Improvements Improvements (D) (E)Description No. Unit Price Unit Quant.Cost Quant.Cost Quant.Cost Quant.Cost Quantity Remaining (Bond Reduction) (B)(C) SITE IMPROVEMENT BOND QUANTITY WORKSHEET FOR DRAINAGE AND STORMWATER FACILITIES DRAINAGE (Continued)Culvert, LCPE, 60"D-69 180.00$ LF Culvert, LCPE, 72"D-70 192.00$ LF Culvert, HDPE, 6"D-71 42.00$ LFCulvert, HDPE, 8"D-72 42.00$ LFCulvert, HDPE, 12"D-73 74.00$ LFCulvert, HDPE, 15"D-74 106.00$ LF Culvert, HDPE, 18"D-75 138.00$ LF Culvert, HDPE, 24"D-76 221.00$ LFCulvert, HDPE, 30"D-77 276.00$ LFCulvert, HDPE, 36"D-78 331.00$ LFCulvert, HDPE, 48"D-79 386.00$ LF Culvert, HDPE, 54"D-80 441.00$ LF Culvert, HDPE, 60"D-81 496.00$ LFCulvert, HDPE, 72"D-82 551.00$ LFPipe, Polypropylene, 6"D-83 84.00$ LFPipe, Polypropylene, 8"D-84 89.00$ LF Pipe, Polypropylene, 12"D-85 95.00$ LF Pipe, Polypropylene, 15"D-86 100.00$ LFPipe, Polypropylene, 18"D-87 106.00$ LFPipe, Polypropylene, 24"D-88 111.00$ LFPipe, Polypropylene, 30"D-89 119.00$ LF Pipe, Polypropylene, 36"D-90 154.00$ LF Pipe, Polypropylene, 48"D-91 226.00$ LFPipe, Polypropylene, 54"D-92 332.00$ LFPipe, Polypropylene, 60"D-93 439.00$ LFPipe, Polypropylene, 72"D-94 545.00$ LF Culvert, DI, 6"D-95 61.00$ LF Culvert, DI, 8"D-96 84.00$ LFCulvert, DI, 12"D-97 106.00$ LFCulvert, DI, 15"D-98 129.00$ LFCulvert, DI, 18"D-99 152.00$ LF Culvert, DI, 24"D-100 175.00$ LF Culvert, DI, 30"D-101 198.00$ LFCulvert, DI, 36"D-102 220.00$ LFCulvert, DI, 48"D-103 243.00$ LFCulvert, DI, 54"D-104 266.00$ LF Culvert, DI, 60"D-105 289.00$ LF Culvert, DI, 72"D-106 311.00$ LF SUBTOTAL THIS PAGE: (B)(C)(D)(E) Page 3 of 5 Ref 8-H Bond Quantity Worksheet SECTION II.c DRAINAGE Unit Prices Updated: 06/14/2016 Version: 04/26/2017 Printed 2/5/2019 CED Permit #:######## Existing Future Public PrivateRight-of-Way Improvements Improvements (D) (E)Description No. Unit Price Unit Quant.Cost Quant.Cost Quant.Cost Quant.Cost Quantity Remaining (Bond Reduction) (B)(C) SITE IMPROVEMENT BOND QUANTITY WORKSHEET FOR DRAINAGE AND STORMWATER FACILITIES Specialty Drainage ItemsDitching SD-1 9.50$ CY Flow Dispersal Trench (1,436 base+)SD-3 28.00$ LF French Drain (3' depth)SD-4 26.00$ LFGeotextile, laid in trench, polypropylene SD-5 3.00$ SYMid-tank Access Riser, 48" dia, 6' deep SD-6 2,000.00$ EachPond Overflow Spillway SD-7 16.00$ SY Restrictor/Oil Separator, 12"SD-8 1,150.00$ Each 1 1,150.00 Restrictor/Oil Separator, 15"SD-9 1,350.00$ EachRestrictor/Oil Separator, 18"SD-10 1,700.00$ EachRiprap, placed SD-11 42.00$ CY 1 42.00Tank End Reducer (36" diameter)SD-12 1,200.00$ Each Infiltration pond testing SD-13 125.00$ HR Permeable Pavement SD-14Permeable Concrete Sidewalk SD-15Culvert, Box __ ft x __ ft SD-16 SUBTOTAL SPECIALTY DRAINAGE ITEMS:1,192.00 (B)(C)(D)(E)STORMWATER FACILITIES (Include Flow Control and Water Quality Facility Summary Sheet and Sketch)Detention Pond SF-1 Each Detention Tank SF-2 Each Detention Vault SF-3 300,000.00$ Each 1 300,000.00 Infiltration Pond SF-4 Each Infiltration Tank SF-5 Each Infiltration Vault SF-6 Each Infiltration Trenches SF-7 Each Basic Biofiltration Swale SF-8 Each Wet Biofiltration Swale SF-9 Each Wetpond SF-10 Each Wetvault SF-11 Each Sand Filter SF-12 Each Sand Filter Vault SF-13 Each Linear Sand Filter SF-14 Each Proprietary Facility SF-15 Each Bioretention Facility SF-16 Each SUBTOTAL STORMWATER FACILITIES:300,000.00 (B)(C)(D)(E) Page 4 of 5 Ref 8-H Bond Quantity Worksheet SECTION II.c DRAINAGE Unit Prices Updated: 06/14/2016 Version: 04/26/2017 Printed 2/5/2019 CED Permit #:######## Existing Future Public PrivateRight-of-Way Improvements Improvements (D) (E)Description No. Unit Price Unit Quant.Cost Quant.Cost Quant.Cost Quant.Cost Quantity Remaining (Bond Reduction) (B)(C) SITE IMPROVEMENT BOND QUANTITY WORKSHEET FOR DRAINAGE AND STORMWATER FACILITIES WRITE-IN-ITEMS (INCLUDE ON-SITE BMPs)WI-1 WI-2WI-3WI-4 WI-5WI-6WI-7 WI-8 WI-9WI-10 WI-11 WI-12WI-13 WI-14 WI-15 SUBTOTAL WRITE-IN ITEMS: DRAINAGE AND STORMWATER FACILITIES SUBTOTAL:10,140.00 334,914.00 SALES TAX @ 10%1,014.00 33,491.40 DRAINAGE AND STORMWATER FACILITIES TOTAL:11,154.00 368,405.40 (B)(C)(D)(E) Page 5 of 5 Ref 8-H Bond Quantity Worksheet SECTION II.c DRAINAGE Unit Prices Updated: 06/14/2016 Version: 04/26/2017 Printed 2/5/2019 Planning Division |1055 South Grady Way – 6th Floor | Renton, WA 98057 (425) 430-7200 Date: Name:Project Name: PE Registration No:CED Plan # (LUA): Firm Name:CED Permit # (U): Firm Address:Site Address: Phone No.Parcel #(s): Email Address:Project Phase: Site Restoration/Erosion Sediment Control Subtotal (a) Existing Right-of-Way Improvements Subtotal (b)(b)22,012.93$ Future Public Improvements Subtotal (c)90,389.75$ Stormwater & Drainage Facilities (Public & Private) Subtotal (d)(d)379,559.40$ (e) (f) Site Restoration Civil Construction Permit Maintenance Bond 98,392.42$ Bond Reduction 2 Construction Permit Bond Amount 3 Minimum Bond Amount is $10,000.00 1 Estimate Only - May involve multiple and variable components, which will be established on an individual basis by Development Engineering. 2 The City of Renton allows one request only for bond reduction prior to the maintenance period. Reduction of not more than 70% of the original bond amount, provided that the remaining 30% will cover all remaining items to be constructed. 3 Required Bond Amounts are subject to review and modification by Development Engineering. * Note: The word BOND as used in this document means any financial guarantee acceptable to the City of Renton. ** Note: All prices include labor, equipment, materials, overhead and profit. EST1 ((b) + (c) + (d)) x 20% -$ MAINTENANCE BOND */** (after final acceptance of construction) 35,001.45$ 22,012.93$ 412,578.79$ 35,001.45$ -$ 379,559.40$ -$ 447,580.24$ P (a) x 100% SITE IMPROVEMENT BOND QUANTITY WORKSHEET BOND CALCULATIONS 2/5/2019 Preston Longoni, P.E. 55602 Core Design, Inc. R ((b x 150%) + (d x 100%)) S (e) x 150% + (f) x 100% Bond Reduction: Existing Right-of-Way Improvements (Quantity Remaining)2 Bond Reduction: Stormwater & Drainage Facilities (Quantity Remaining)2 T (P +R - S) Prepared by:Project Information CONSTRUCTION BOND AMOUNT */** (prior to permit issuance) 425.885.7877 pjl@coredesigninc.com Wang SP 18-000200 19016 116th Ave SE 6198400125 FOR APPROVAL ######## 12100 NE 195th St, Suite 300 Page 1 of 1 Ref 8-H Bond Quantity Worksheet SECTION III. BOND WORKSHEET Unit Prices Updated: 06/14/2016 Version: 04/26/2017 Printed 2/5/2019 Core Design, Inc. WANG SHORT PLAT Page 30 10 OPERATIONS AND MAINTENANCE Operations and maintenance information is provided within the following pages. APPENDIX A MAINTENANCE REQUIREMENTS FOR FLOW CONTROL, CONVEYANCE, AND WQ FACILITIES NO. 3 - DETENTION TANKS AND VAULTS Maantenance Component Defect or Problem Conditions When Maintenance is Needed Results Expected When Maintenance is Performed Site Trash and debris Any trash and debris vvhich exceed 1 cubic foot per 1,000 square feet (this is about equat to the amount of trash it would take to fill up one standard size ofiice garbage can). ln general, there should be no visual evidence ofdumping. Trash and debris cleared from site. Noxious weeds Any noxious or nuisance vegetation which may constitute a hazard to County personnel or the public. Noxious and nuisance vegetation removed according to applicable regulations. No danger of noxious vegetation wfiere County personnel or the public might normally be. Contaminants and pollution Any evidence of contaminants or pollution such as oil, gasoline, concrete slurries or paint. Materials removed and disposed of according to applicable regulations. Source control BMPS implemented if appropriate. No contaminants present other than a surface oil film. Grass/groundcover Grass or groundcover exceeds 18 inches in height. Grass or groundcover mowed to a height no greater than 6 inches. Tank or Vault Storage Area Trash and debris Any trash and debris accumulated in vault or tank (includes floatables and non-floatables). No trash or debris in vault. Sediment accumulation Accumulated sediment depth exceeds 1 0% of the diameter of the storage area lor lz length of storage vault or any point depth exceeds 15% of diameter. Example: 72-inch storage tank would reguire cleaning when sediment reaches depth of 7 inches for more than % length of tank. All sediment removed from storage area. Tank Structure Plugged air vent Any blockage of the vent.Tank or vault freely vents. Tank bent out of shape Any part of tanldpipe is bent out of shape more than 1 0% of its design shape. Tank repaired or replaced to design. Gaps between sections, damaged joints or cracks or tears in wall A gap wider than /.-inch at the joint of any tank sections or any evidence of soil particles entering the tank at a joint or through a wall. No water or soil entering tank through joints or walls. Vault Structure Damage to wall, frame, bottom, and/or top slab Cracks wider th an /"-inch, any evidence of soil entering the structure through cracks or qualified inspection personnel determines that the vault is not structurally sound. Vault is sealed and structurally sound. lnleUOutlet Pipes Sediment accumulation Sediment filling 20% or more of the pipe.lnleVoutlet pipes clear of sediment. Trash and debris Trash and debris accumulated in inleUoutlet pipes (includes floatables and non-floatables). No trash or debris in pipes. Damaged Cracks wider than /"-inch at the joint of the inleUoutlet pipes or any evidence of soil entering at the joints of the inleuoutlet pipes. No cracks more than %-inch wide at the joint of the inleyoutlet pipe. 2009 Surface Water Design Manual - Appendix A A-5 t/9/2009 APPENDIX A MAINTENANCE REQUIREMENTS FLOW CONTROL, CONVEYANCE, AND WQ FACILITIES NO. 3 - DETENTION TANKS AND VAULTS Maintenance Component Defect or Problem Conditions When Maintenance is Needed Results Expected When Maintenance is Performed Access Manhole Cover/lid not in place Cover/lid is missing or only partially in place. Any open manhole requires immediate maintenance, Manhole access covered Locking mechanism not working Mechanism cannot be opened by one maintenance person with proper tools. Bolts cannot be seated. Self-locking cover/lid does not work. Mechanism opens with proper tools. Cover/lid difficult to remove One maintenance person cannot remove cover/lid after applying 80 lbs of lift. Cover/lid can be removed and reinstalled by one maintenance person. Ladder rungs unsafe Missing rungs, misalignment, rust, or cracks.Ladder meets design standards. Allows maintenance person safe access, Large access doors/plate Damaged or difiicult to open Large access doors or plates cannot be opened/removed using normal equipment. Replace or repair access door so it can opened as designed. Gaps, doesn't cover completely Large access doors not flat and/or access opening not completely covered. Doors close flat and covers access opening completely. Lifting Rings missing, rusted Lifting rings not capable of lifting weight of door or plate. Lifting rings sufficienl to lift or remove door or plate. t/9/2009 A-6 2009 Surface Water Design Manual - Appendix A APPENDIX A MAINTENANCE REQUIREMENTS FOR FLOW CONTROL, CONVEYANCE, AND WQ FACILITIES NO. 4 - CONTROL STRUCTURE/FLOW RESTRICTOR Maintenance Component Defect or Problem Condition When Maintenance is Needed Results Expected When Maintenance is Performed Structure Trash and debris Trash or debris of more than % cubic foot which is located immediately in front of the structure opening or is blocking capacity of the structure by more than 10%. No Trash or debris blocking or potentially blocking entrance to structure. Trash or debris in the structure that exceeds 1/3 the depth fom the bottom of basin to invert the lowest pipe into or out of the basin. No hash or debris in the structure. Deposits of garbage exceeding 1 cubic foot in volume. No condition present which would attract or support the breeding of insects or rodents. Sediment Sediment exceeds 600/o of the depth from the bottom of the structure to the invert of the lowest pipe into or out of the structure or the bottom of the FROP-T section or is within 6 inches of the invert of the lowest pipe into or out of the structure or the bottom of the FROP-T section. Sump of structure contains no sediment. Damage to frame and/or top slab Corner of frame extends more than % inch past curb face into the street (lf applicable). Frame is even with curb. Top slab has holes larger than 2 square inches or cracks wider than Y1 inch. Top slab is free of holes and cracks. Frame not sitting flush on top slab, i.e., separation of more than % inch of the frame from the top slab. Frame is sitting flush on top slab. Cracks in walls or boftom Cracks wider th an l"inch and longer than 3 feet, any evidence of soil particles entering structure through cracks, or maintenance person judges that structure is unsound. Structure is sealed and shucturally sound. Cracks widerthan/zinch and longerthan 1 foot at the joint of any inleUoutlet pipe or any evidence of soil particles entering structure through cracks. No cracks more than 1[ inch wide at the joint of inleUoutlet pipe. SettlemenV misalignment Structure has settled more than 1 inch or has rotated more than 2 inches out of alignment. Basin replaced or repaired to design standards. Damaged pipe joints Cracks wider than y2-inch at the joint of the inleUoutlet pipes or any evidence of soil entering the structure at the joint of the inleVoutlet pipes. No cracks more than %-inch wide at the joint of inlevoutlet pipes. Contaminants and pollution Any evidence of contaminants or pollution such as oil, gasoline, concrete slurries or paint. Materials removed and disposed of according to applicable regulations. Source control BMPs implemented if appropriate. No contaminants present other than a surface oil film. Ladder rungs missing or unsafe Ladder is unsafe due to missing rungs, misalignment, rust, cracks, or sharp edges. Ladder meets design standards and allows maintenance person safe access. FROP-T Section Damage T section is not securely attached to structure wall and outlet pipe structure should support at least 1,000 lbs of up or down pressure. T section securely attached to wall and outlet pipe. Structure is not in upright position (allow up to 10% from plumb). Structure in correct position. Connections to outlet pipe are not watertight or show signs of deteriorated grout. Connections to outlet pipe are water tight; structure repaired or replaced and works as designed. Any holes-other than designed holes-in the structure. Structure has no holes other than designed holes. Cleanout Gate Damaged or missing Cleanout gate is missing.Replace cleanout gate. 2009 Surface Water Design Manual - Appendix A A-7 t/912009 APPENDIX A MAINTENANCE REQUIREMENTS FLOW CONTROL, CONVEYANCE, AND WQ FACILITIES NO. 4 - CONTROL STRUCTURE/FLOW RESTRICTOR Maintenance Component Defect or Problem Condition When Maintenance is Needed Results Expected When Maintenance is Performed Cleanout gate is not watertight.Gate is watertight and works as designed. Gate cannot be moved up and down by one maintenance person. Gate moves up and down easily and is watertight. Chain/rod leading to gate is missing or damaged.Chain is in place and works as designed. Orifice Plate Damaged or missing Control device is not working properly due to missing, out of place, or bent orifice plate. Plate is in place and works as designed. Obstructions Any hash, debris, sediment, or vegetation blocking the plate. Plate is free of all obstructions and works as designed. Overflow Pipe Obstructions Any trash or debris blocking (or having the potential of blocking) the overflow pipe. Pipe is free of all obstructions and works as designed. Deformed or damaged lip Lip of overflow pipe is bent or deformed.Overflow pipe does not allow overflow at an elevation lower than design lnleUOutlet Pipe Sediment accumulalion Sediment filling 20% or more of the pipe lnlet/outlet pipes clear of sediment. Trash and debris Trash and debris accumulated in inleuoutlet pipes (includes floatables and non-floatables). No trash or debris in pipes. Damaged Cracks wider than /"-inch at the joint of the inleUoutlet pipes or any evidence of soil entering at the joints of the inleUoutlet pipes. No cracks more than %-inch wide at the joint of the inleVoutlet pipe. Metal Grates (lf Applicable) Unsafe grate opening Grate with opening wider than % incn.Grate opening meets design standards. Trash and debris Trash and debris that is blocking more than 20% of grate surface. Grate free of trash and debris. footnote to guidelines for disposal Damaged or missing Grate missing or broken membe(s) of the grate.Grate is in place and meets design standards. Manhole Cover/Lid Cover/lid not in place Cover/lid is missing or only partially in place. Any open structure requires urgent maintenance. Cover/lid protects opening to structure. Locking mechanism Not Working Mechanism cannot be opened by one maintenance person with proper tools. Bolts cannot be seated. Self-locking cover/lid does not work. Mechanism opens with proper tools. Cover/lid difficult to Remove One maintenance person cannot remove cover/lid after applying 80 lbs. of lift. Cover/lid can be removed and reinstalled by one maintenance person. t/9/2009 A-8 2009 Surface Water Design Manual - Appendix A APPENDIX A MAINTENANCE REQUIREMENTS FOR FLOW CONTROL, CONVEYANCE, AND WQ FACILITIES NO. 5 - CATCH BASINS AND MANHOLES Maintenance Component Defect or Problem Condition When Maintenance is Needed Results Expected When Maintenance is Performed Structure Sediment Sediment exceeds 607o of the depth from the bottom of the catch basin to the invert of the lowest pipe into or out of the catch basin or is within 6 inches of the invert of the lowest pipe into or out of the catch basin. Sump of catch basin contains no sediment. Trash and debris Trash or debris of more than % cubic foot which is located immediately in front of the catch basin opening or is blocking capacity of the catch basin by more than 107o. No Trash or debris blocking or potentially blocking entrance to catch basin. Trash or debris in the catch basin that exceeds1/. the depth from the bottom of basin to invert the lowest pipe into or out of the basin. No trash or debris in the catch basin Dead animals or vegetation that could generate odors that could cause complaints or dangerous gases (e.9., methane). No dead animals or vegetation present within catch basin. Deposits of garbage exceeding 1 cubic foot in volume. No condition present which would attract or support the breeding of insects or rodents. Damage to frame and/or top slab Corner of frame extends more than % inch past curb face into the street (lf applicable). Frame is even with curb. Top slab has holes larger than 2 square inches or cracks wider th an la inch . Top slab is free of holes and cracks Frame not sitting flush on top slab, i.e., separation of more than % inch of the frame from the top slab. Frame is sitting flush on top slab. Cracks in walls or bottom Cracks wider th an lzinch and longer than 3 feet, any evidence of soil particles entering catch basin through cracks, or maintenance person judges that catch basin is unsound. Calch basin is sealed and structurally sound. Cracks wider than y2inch and longer than 1 foot at the joint of any inleuoutlet pipe or any evidence of soil particles entering catch basin through cracks. No cracks more than 1/4 inch wide at the joint of inleUoutlet pipe. SettlemenV misalignment Catch basin has settled more than 1 inch or has rotated more than 2 inches out of alignment. Basin replaced or repaired to design standards. Damaged pipe joints Cracks wider than 1/*inch at the joint of the inleUoutlet pipes or any evidence of soil entering the catch basin at the joint of the inlevoutlet pipes. No cracks more than %-inch wide at the joint of inleVoutlet pipes. Contaminants and pollution Any evidence of contaminants or pollution such as oil, gasoline, concrete slurries or paint. Materials removed and disposed of according to applicable regulations. Source control BMPs implemented if appropriate. No contaminants present other than a surface oil film. lnlevoutlet Pipe Sediment accumulation Sediment filling 2oo/o ot mo'e of the pipe.lnlevoutlet pipes clear of sediment. Trash and debris Trash and debris accumulated in inleUoutlet pipes (includes floatables'and non-floatables) No trash or debris in pipes. Damaged Cracks wider than 1/rinch at the joint of the inleUoutlet pipes or any evidence of soil entering at the joints of the inlevoutlet pipes. No cracks more than %-inch wide at the joint of the inleUoutlet pipe. 2009 Surface Water Design Manual - Appendix A A-9 u9/2009 APPENDIX A MAINTENANCE REQUIREMENTS FLOW CONTROL, CONVEYANCE, AND WQ FACILITIES NO. 5 - CATCH BASINS AND MANHOLES Maintenance Component Defect or Problem Condition When Maintenance is Needed Results Expected When Maintenance is Performed Metal Grates (Catch Basins) Unsafe grate opening Grate with opening wider than f. incn.Grate opening meets design standards. Trash and debris Trash and debris that is blocking more than 20% of grate surface. Grate free of trash and debris. footnote to guidelines for disposal Damaged or missing Grate missing or broken member(s) of the grate. Any open structure requires urgent maintenance. Grate is in place and meets design standards. Manhole Cover/Lid Cover/lid not in place Cover/lid is missing or only partially in place. Any open structure requires urgent maintenance. Cover/lid protects opening to structure. Locking mechanism Not Working Mechanism cannol be opened by one maintenance person with proper tools. Bolts cannot be seated. Self-locking cover/lid does not work. Mechanism opens with proper tools. Cover/lid difficult to Remove One maintenance person cannot remove cover/lid after applying 80 lbs. of lift. Cover/lid can be removed and reinstalled by one maintenance person. t/9/2009 A-10 2009 Surface Water Design Manual - Appendix A APPENDIX A MAINTENANCE REQUIREMENTS FOR FLOW CONTROL, CONVEYANCE, AND WQ FACILITIES NO. 6 - CONVEYANCE PIPES AND DITCHES Maintenance Component Defect or Problem Conditions When Maintenance is Needed Results Expected When Maintenance is Performed Pipes Sediment & debris accumulation Accumulated sediment or debris that exceeds 2oo/o oI the diameter of the pipe. Water flows freely through pipes. Vegetation/roots Vegetation/roots that reduce free movement of water through pipes. Water flows freely through pipes. Contaminants and pollution Any evidence of contaminants or pollution such as oil, gasoline, concrete slurries or paint. Materials removed and disposed of according to applicable regulations. Source control BMPs implemented if appropriate. No contaminants present other than a surface oil film. Damage to protective coating or corrosion Protective coating is damaged; rust or corrosion is weakening the structural integrity of any part of pipe. Pipe repaired or replaced Damaged Any dent that decreases the cross section area of pipe by more lhan 2oo/o or is determined to have weakened structural integrity of the pipe. Pipe repaired or replaced. Ditches Trash and debris Trash and debris exceeds 1 cubicfoot per 1,000 square feet of ditch and slopes. Trash and debris cleared from ditches. Sediment accumulation Accumulated sediment that exceeds 20% of the design depth. Ditch cleaned/flushed of all sediment and debris so that it matches design. Noxious weeds Any noxious or nuisance vegetation which may constitute a hazard to County personnel or the public. Noxious and nuisance vegetation removed according to applicable regulations. No danger of noxious vegetation where County personnel or the public might normally be. Contaminants and pollution Any evidence of contaminants or pollution such as oil, gasoline, concrete slurries or paint. Materials removed and disposed of according to applicable regulations. Source control BMPs implemented if appropriate. No contaminants present other than a surface oil film. Vegetation Vegetation that reduces free movement of water through ditches. Water flows freely through ditches. Erosion damage to slopes Any erosion observed on a ditch slope.Slopes are not eroding. Rock lining out of place or missing (lf Applicable) One layer or less of rock exists above native soil area 5 square feet or more, any exposed native soil. Replace rocks to design standards. 2009 Surface Water Design Manual - Appendix A A-ll v9t2009 APPENDIX A MAINTENANCE REQUIREMENTS FOR FLOW CONTROL, CONVEYANCE, AND WQ FACILITIES NO. 17 - WETVAULT Maintenance Component Defect or Problem Condition When Maintenance is Needed Results Expected When Maintenance is Performed Site Trash and debris Trash and debris accumulated on facility site Trash and debris removed from facility site. Treatment Area Trash and debris Any trash and debris accumulated in vault (includes floatables and non-floatables). No trash or debris in vault. Sediment accumulation Sediment accumulation in vault bottom exceeds the depth of the sediment zone plus 6 inches. No sediment in vault. Contaminants and pollution Any evidence of contaminants or pollution such as oil, gasoline, concrete slurries or paint. Materials removed and disposed of according to applicable regulations. Source control BMPs implemented if appropriate. No contaminants present other than a surface oil film. Vault Shucture Damage to wall, frame, bottom, and/or top slab Cracks wider than lz-inch, any evidence of soil entering the structure through cracks, vault does not retain water or qualified inspection personnel determines that the vault is not structurally sound. Vault is sealed and structurally sound. Baffles damaged Baffles corroding, cracking, warping and/or showing signs of failure or baffle cannot be removed. Repair or replace baffles or walls to specifications. Ventilation Ventilation area blocked or plugged.No reduction of ventilation area exists. lnleUOutlet Pipe Sediment accumulation Sediment filling 20olo or fiore of the pipe.lnleUoutlet pipes clear of sediment. Trash and debris Trash and debris accumulated in inleUoutlet pipes (iniludes floatables and non-floatables). No trash or debris in pipes Damaged Cracks wider than 1/rinch at the joint of the inleVoutlet'pipes or any evidenc6 of soil entering at the joints of the inlevoutlet pipes. No cracks more than %-inch wide at the joint of the inleUoutlet pipe. Gravity Drain lnoperable valve Valve will not open and close.Valve opens and closes normally Valve won't seal Valve does not seal completely Valve completely seals closed Access Manhole Access cover/lid damaged or difficult to open Access cover/lid cannot be easily opened by one person. Corrosion/deformation of cover/lid. Access cover/lid can be opened by one person. Locking mechanism not working Mechanism cannot be opened by one maintenance person with proper tools. Bolts cannot be seated. Selflocking cover/lid does not work. Mechanism opens with proper tools Cover/lid difficult to remove One maintenance person cannot remove cover/lid afler applying 80 lbs of lift. Cover/lid can be removed and reinstalled by one maintenance person. Access doorVplate has gaps, doesn't cover completely Large access doors not flat and/or access opening not completely covered. Doors close flat and covers access opening completely. Lifting Rings missing, rusted Lifting rings not capable of lifting weight of door or plate. Lifting rings sufficient to lift or remove door or plate. Ladder rungs unsafe Missing rungs, misalignment, rust, or cracks.Ladder meets design standards. Allows maintenance person safe access. 2009 Surface Water Design Manual - Appendix A A-23 t/9/2009 APPENDIX A MAINTENANCE REQUIREMENTS FOR FLOW CONTROL, CONVEYANCE, AND WQ FACILITIES NO. 24 - CATCH BASIN INSERT Maintenance Component Defect or Problem Conditions When Maintenance is Needed Results Expected When Maintenance is Performed Media lnsert Visible Oil Visible oil sheen passing through media Media inset replaced lnsert does not fit catch basin properly Flow gets into catch basin without going through media. All flow goes through media. Filter media plugged Filter media plugged.Flow through filter media is normal Oil absorbent media saturated Media oil saturated.Oil absorbent media replaced. Water saturated Catch basin insert is saturated with water, which no longer has the capacity to absorb. lnsert replaced. Service life exceeded Regular interval replacement due to average life of media insert product, month. typical typically one Media replaced at manufacture/s recommended interval. Seasonal maintenance Vvhen storms occur and during the wet season.Remove, clean and replace or install new insert after major storms, monthly during the wet season or at manufacturer's recommended interval. 2009 Surface Water Design Manual - Appendix A A-35 r/9/2009 Core Design, Inc. WANG SHORT PLAT Page 31 APPENDICES Core Design, Inc. WANG SHORT PLAT Page 32 Appendix A – Parcel Information King County Parcel Report (0007200196) Fair, Equitable, and Understandable Property Valuations You're in: Assessor >> Look up Property Info >> eReal Property Department ofAssessments 500 FourthAvenue,Suite ADM-AS-0708,Seattle, WA98104 Office Hours:Mon - Fri 8:30 a.m. to4:30 p.m. TEL: 206-296-7300FAX: 206-296-5107TTY: 206-296-7888 Send usmail ADVERTISEMENT New Search Property Tax Bill Map This Property Glossary of Terms Area Report Print Property Detail PARCEL DATA Parcel 619840-0125 Name CHINA PRODUCTS INC Site Address 19016 116TH AVE SE98058 Residential Area 051-006 (SW Appraisal District) Property Name Jurisdiction RENTON Levy Code 2128 Property Type R Plat Block / Building Number 1 Plat Lot / Unit Number 6 Quarter-Section-Township-Range SW-33-23-5 Legal Description NORTHWESTERN GARDEN TRS #4 LESS E 30 FT PLat Block: 1 Plat Lot: 6 LAND DATA Highest & Best Use As If Vacant SINGLE FAMILY Highest & Best Use AsImproved PRESENT USE Present Use Single Family(ResUse/Zone) Land SqFt 88,862 Acres 2.04 Percentage Unusable Unbuildable NO Restrictive Size Shape NO Zoning R-4 Water WATER DISTRICT Sewer/Septic PRIVATE Road Access PUBLIC Parking ADEQUATE Street Surface PAVED Views Waterfront Rainier Territorial Olympics Cascades Seattle Skyline Puget Sound Lake Washington Lake Sammamish Lake/River/Creek Other View Waterfront Location Waterfront Footage 0 Lot Depth Factor 0 Waterfront Bank Tide/Shore Waterfront Restricted Access Waterfront Access Rights NO Poor Quality NO Proximity Influence NO Designations Nuisances Historic Site Current Use (none) Nbr Bldg Sites Adjacent to Golf Fairway NO Adjacent to Greenbelt NO Other Designation NO Deed Restrictions NO Development Rights Purchased NO Easements NO Native Growth ProtectionEasement NO DNR Lease NO Topography Traffic Noise MODERATE Airport Noise Power Lines NO Other Nuisances NO Problems Water Problems NO Transportation Concurrency NO Other Problems NO Environmental Environmental NO BUILDING Building Number 1 Year Built 1956 Year Renovated 0 Stories 1 Living Units 1 Grade 6 Low Average Grade Variant 0 Condition Good Basement Grade 1st Floor 1,350 1/2 Floor 0 2nd Floor 0 Upper Floor 0 Click the camera to see more pictures. Picture of Building 1 Floor plan of Building 1 ADVERTISEMENT ReferenceLinks: King County Tax Links Property Tax Advisor Washington StateDepartment ofRevenue (Externallink) Washington StateBoard of TaxAppeals (External link) Board ofAppeals/Equalization Districts Report iMap Recorder's Office Scanned images ofsurveys and othermap documents Scanned images ofplats Notice mailing date:07/20/2017 Search Kingcounty.gov Home How do I... Services About King County Departments King County Department of Assessments Finished Basement 0 Total Finished Area 1,350 Total Basement 0 Basement Garage 0 Unfinished 1/2 0 Unfinished Full 0 AGLA 1,350 Attached Garage 0 Bedrooms 3 Full Baths 1 3/4 Baths 0 1/2 Baths 0 Heat Source Electricity Heat System Elec BB Deck Area SqFt 0 Open Porch SqFt 0 Enclosed Porch SqFt 0 Brick/Stone 0 Fireplace Single Story 0 Fireplace Muilti Story 0 Fireplace Free Standing 1 Fireplace Additional 0 AddnlCost 0 Obsolescence 0 Net Condition 0 Percentage Complete 0 Daylight Basement View Utilization Accessory Of Building Number: 1 Accessory Type Picture Description SqFt Grade Eff Year %Value Date Valued PRK:DET GAR 26' x 26 670 3 Poor 1947 TAX ROLL HISTORY Account ValuedYear TaxYear OmitYear LevyCode AppraisedLand Value ($) AppraisedImps Value ($) AppraisedTotal Value ($) NewDollars ($) TaxableLandValue ($) TaxableImpsValue ($) TaxableTotalValue ($) TaxValue Reason 619840012501 2017 2018 2128 252,000 130,000 382,000 0 252,000 130,000 382,000 619840012501 2016 2017 2128 240,000 122,000 362,000 0 240,000 122,000 362,000 619840012501 2015 2016 2128 240,000 118,000 358,000 0 240,000 118,000 358,000 619840012501 2014 2015 2128 240,000 104,000 344,000 0 240,000 104,000 344,000 619840012501 2013 2014 2128 288,000 13,000 301,000 0 288,000 13,000 301,000 619840012501 2012 2013 2128 288,000 9,000 297,000 0 288,000 9,000 297,000 619840012501 2011 2012 2128 288,000 9,000 297,000 0 288,000 9,000 297,000 619840012501 2010 2011 2128 315,000 13,000 328,000 0 315,000 13,000 328,000 619840012501 2009 2010 2128 315,000 30,000 345,000 0 315,000 30,000 345,000 619840012501 2008 2009 2128 315,000 118,000 433,000 0 315,000 118,000 433,000 619840012501 2007 2008 4250 276,000 110,000 386,000 0 276,000 110,000 386,000 619840012501 2006 2007 4250 251,000 94,000 345,000 0 251,000 94,000 345,000 619840012501 2005 2006 4250 242,000 78,000 320,000 0 242,000 78,000 320,000 619840012501 2004 2005 4250 131,000 115,000 246,000 0 131,000 115,000 246,000 619840012501 2003 2004 4250 131,000 115,000 246,000 0 131,000 115,000 246,000 619840012501 2002 2003 4250 126,000 106,000 232,000 0 126,000 106,000 232,000 619840012501 2001 2002 4250 120,000 98,000 218,000 0 120,000 98,000 218,000 619840012501 2000 2001 4250 115,000 85,000 200,000 0 115,000 85,000 200,000 619840012501 1999 2000 4250 96,000 133,000 229,000 0 96,000 133,000 229,000 619840012501 1998 1999 4250 90,000 99,000 189,000 0 90,000 99,000 189,000 619840012501 1997 1998 4250 0 0 0 0 82,000 91,000 173,000 619840012501 1996 1997 4250 0 0 0 0 82,000 85,700 167,700 619840012501 1994 1995 4250 0 0 0 0 82,000 85,700 167,700 619840012501 1992 1993 4250 0 0 0 0 98,400 69,300 167,700 619840012501 1990 1991 4250 0 0 0 0 57,200 69,300 126,500 619840012501 1988 1989 4230 0 0 0 0 43,700 33,700 77,400 619840012501 1986 1987 4230 0 0 0 0 35,100 30,700 65,800 619840012501 1984 1985 4230 0 0 0 0 37,000 31,900 68,900 619840012501 1982 1983 4230 0 0 0 0 37,000 31,900 68,900 SALES HISTORY ExciseNumber RecordingNumber DocumentDate Sale Price Seller Name Buyer Name Instrument SaleReason 2885073 8/22/2017 $749,995.00 Recorder's Officerecently updatedrecords searchapplication. Buyer andseller names aretemporary notdisplayed here. Please click theexcise numberon the left to visitRecorder'sOffice site. 1757842 20000608000651 6/7/2000 $245,000.00 WELDON MARIEFERN PHAM THINH+THUY TLE+LE THANHSON StatutoryWarrantyDeed None Information for... Residents Businesses Job seekers Volunteers King County employees Do more online Trip Planner Property tax information & payment Jail inmate look up Parcel viewer or iMap Public records More online tools... Get help Contact us Customer service Phone list Employee directory Subscribe to alerts Stay connected! View King County social media © King County, WA 2016 Privacy Accessibility Terms of use 1359938 199402250638 2/7/1994 $145,000.00 COTTON LAILA M WELDONMARIE FERN WarrantyDeed None REVIEW HISTORY PERMIT HISTORY HOME IMPROVEMENT EXEMPTION New Search Property Tax Bill Map This Property Glossary of Terms Area Report Print Property Detail ADVERTISEMENT Updated: March 17, 2016 Share Tweet Email Print Information for...Do more online Get help Core Design, Inc. WANG SHORT PLAT Page 33 Appendix B – Resource Review & Off-site Analysis Documentation Aquifer Protection Zone FIRM Map Coal Mine Hazard Map Erosion Hazard Map Slide Hazard Map Steep Slopes Map Drainage Complaints Exhibit LAKE WASHINGTON Big SoosCreekLAKE WASHINGTON M a y C r e e k Cedar RiverCedar River Cedar RiverLAKE YOUNGS PANTHER LAKE LAKE WASHINGTON Soos CreekLAKE WASHINGTONLAKE WASHINGTON 60003000 k k k k k k k k k k k k k k k k k k k k k k k k k k k kk k k k k k k k k k k k k k k k k k k k HoquiamAveNEE Valley Hwy84thAveSNEParkDr SW 7th St SE 128th St SE 192nd StLindAveSWMainAveSS 132nd St Factory PlN Tal bot Rd SN 3rd St RainierAveS 164thAveSETukwilaPkwy SPugetDr NE 4th St S 3rd St S 1 2 9 th S t68thAveSSWSunsetBlvd SW 16th St 116thAveSEN 4th St In t e r u r b a n A v e S WilliamsAveNBronsonWa y N NE7thSt 124thAveSES 7th St SERento n IssaquahRd Rai ni er AveNNewcastle Way CoalCre ek PkwySESW 41st St Taylor Pl N WNESunsetBlvdWellsAveNUnionAveNEN E 3 r d S tHardie Av eSWS180th St Maple Valley Hwy 140thAveSES G ra d y W ayS 2 1 s tSt BensonRdSRento n AveS87thAveS128thAveSE148thAveSESW 43rd St SEC arrRd SE 168thSt Beacon Ave S 68thAveSLoganAveN108thAveSEForestDrSE S2ndSt 141s t AveSERainierAveS 156thAveSES E 183rdStBe n s o n Dr SS124th StS 43rd St Airport Way S W G ra dyW a y SE J o n es RdSunsetBlvdN Puget Dr SES E 204th W aySW 34th StMo n sterRdSW S E 1 4 2 n d P lWestValleyHwySSEMayValleyRd SunsetBlvdNS Carr RdHouserWayNNewcastleGolfClubRd S 133rd St WilliamsAveSWellsAveSEMercerWay154thPlSEDuvallAveNELoganAveSMonroeAveNESunsetBlvdNEEdmondsAveNEStevens AveNWRaini er AveSTalbotRdSOakesdaleAveSWTaylorAveNW164thAveSERainierAveSWestVall eyHwyWestValleyHwyParkAveN108thAveSE6 6th A v e S WM ercerWayWMercer W ay LakemontBl vdSE132ndAve SELakeWashingtonBlvdNE140thWaySE East Valley Rd68thAveS³City of RentonSensitive Areas 0 0.5 10.25 Miles Information Technology - GISmapsupport@rentonwa.govPrinted on: 11/12/2014 Data Sources: City of Renton, King County This document is a graphic representation, not guaranteedto survey accuracy, and is based on the best informationavailable as of the date shown. This map is intended forCity display purposes only. Renton City Limits k Education Fire Station K Valley Medical Center Coal Mine HazardsSeverity HIGH MODERATE UNCLASSIFIED Coordinate System: NAD 1983 HARN StatePlane Washington North FIPS 4601 FeetProjection: Lambert Conformal ConicDatum: North American 1983 HARN k k k k k k k k k k k k k k k k k k k k k k k k k k k kk k k k k k k k k k k k k k k k k k k k HoquiamAveNEE Valley Hwy84thAveSNEParkDr SW 7th St SE 128th St SE 192nd StLindAveSWMainAveSS 132nd St Factory PlN Tal bot Rd SN 3rd St RainierAveS 164thAveSETukwilaPkwy SPugetDr NE 4th St S 3rd St S 1 2 9 th S t68thAveSSWSunsetBlvd SW 16th St 116thAveSEN 4th St In t e r u r b a n A v e S WilliamsAveNBronsonWa y N NE7thSt 124thAveSES 7th St SERento n IssaquahRd Rai ni er AveNNewcastle Way CoalCre ek PkwySESW 41st St Taylor Pl N WNESunsetBlvdWellsAveNUnionAveNEN E 3 r d S tHardie Av eSWS180th St Maple Valley Hwy 140thAveSES G ra d y W ayS 2 1 s tSt BensonRdSRento n AveS87thAveS128thAveSE148thAveSESW 43rd St SEC arrRd SE 168thSt Beacon Ave S 68thAveSLoganAveN108thAveSEForestDrSE S2ndSt 141s t AveSERainierAveS 156thAveSES E 183rdStBe n s o n Dr SS124th StS 43rd St Airport Way S W G ra dyW a y SE J o n es RdSunsetBlvdN Puget Dr SES E 204th W aySW 34th StMo n sterRdSW S E 1 4 2 n d P lWestValleyHwySSEMayValleyRd SunsetBlvdNS Carr RdHouserWayNNewcastleGolfClubRd S 133rd St WilliamsAveSWellsAveSEMercerWay154thPlSEDuvallAveNELoganAveSMonroeAveNESunsetBlvdNEEdmondsAveNEStevens AveNWRaini er AveSTalbotRdSOakesdaleAveSWTaylorAveNW164thAveSERainierAveSWestVall eyHwyWestValleyHwyParkAveN108thAveSE6 6th A v e S WM ercerWayWMercer W ay LakemontBl vdSE132ndAve SELakeWashingtonBlvdNE140thWaySE East Valley Rd68thAveS³City of RentonSensitive Areas 0 0.5 10.25 Miles Information Technology - GISmapsupport@rentonwa.govPrinted on: 11/12/2014 Data Sources: City of Renton, King County This document is a graphic representation, not guaranteedto survey accuracy, and is based on the best informationavailable as of the date shown. This map is intended forCity display purposes only. Renton City Limits k Education Fire Station K Valley Medical Center Erosion HazardSeverity High Coordinate System: NAD 1983 HARN StatePlane Washington North FIPS 4601 FeetProjection: Lambert Conformal ConicDatum: North American 1983 HARN k k k k k k k k k k k k k k k k k k k k k k k k k k k kk k k k k k k k k k k k k k k k k k k k HoquiamAveNEE Valley Hwy84thAveSNEParkDr SW 7th St SE 128th St SE 192nd StLindAveSWMainAveSS 132nd St Factory PlN Tal bot Rd SN 3rd St RainierAveS 164thAveSETukwilaPkwy SPugetDr NE 4th St S 3rd St S 1 2 9 th S t68thAveSSWSunsetBlvd SW 16th St 116thAveSEN 4th St In t e r u r b a n A v e S WilliamsAveNBronsonWa y N NE7thSt 124thAveSES 7th St SERento n IssaquahRd Rai ni er AveNNewcastle Way CoalCre ek PkwySESW 41st St Taylor Pl N WNESunsetBlvdWellsAveNUnionAveNEN E 3 r d S tHardie Av eSWS180th St Maple Valley Hwy 140thAveSES G ra d y W ayS 2 1 s tSt BensonRdSRento n AveS87thAveS128thAveSE148thAveSESW 43rd St SEC arrRd SE 168thSt Beacon Ave S 68thAveSLoganAveN108thAveSEForestDrSE S2ndSt 141s t AveSERainierAveS 156thAveSES E 183rdStBe n s o n Dr SS124th StS 43rd St Airport Way S W G ra dyW a y SE J o n es RdSunsetBlvdN Puget Dr SES E 204th W aySW 34th StMo n sterRdSW S E 1 4 2 n d P lWestValleyHwySSEMayValleyRd SunsetBlvdNS Carr RdHouserWayNNewcastleGolfClubRd S 133rd St WilliamsAveSWellsAveSEMercerWay154thPlSEDuvallAveNELoganAveSMonroeAveNESunsetBlvdNEEdmondsAveNEStevens AveNWRaini er AveSTalbotRdSOakesdaleAveSWTaylorAveNW164thAveSERainierAveSWestVall eyHwyWestValleyHwyParkAveN108thAveSE6 6th A v e S WM ercerWayWMercer W ay LakemontBl vdSE132ndAve SELakeWashingtonBlvdNE140thWaySE East Valley Rd68thAveS³City of RentonSensitive Areas 0 0.5 10.25 Miles Information Technology - GISmapsupport@rentonwa.govPrinted on: 11/12/2014 Data Sources: City of Renton, King County This document is a graphic representation, not guaranteedto survey accuracy, and is based on the best informationavailable as of the date shown. This map is intended forCity display purposes only. Renton City Limits k Education Fire Station K Valley Medical Center Landslide HazardSeverityVery HighHighModerateUnclassified Coordinate System: NAD 1983 HARN StatePlane Washington North FIPS 4601 FeetProjection: Lambert Conformal ConicDatum: North American 1983 HARN k k k k k k k k k k k k k k k k k k k k k k k k k k k kk k k k k k k k k k k k k k k k k k k k HoquiamAveNEE Valley Hwy84thAveSNEParkDr SW 7th St SE 128th St SE 192nd StLindAveSWMainAveSS 132nd St Factory PlN Tal bot Rd SN 3rd St RainierAveS 164thAveSETukwilaPkwy SPugetDr NE 4th St S 3rd St S 1 2 9 th S t68thAveSSWSunsetBlvd SW 16th St 116thAveSEN 4th St In t e r u r b a n A v e S WilliamsAveNBronsonWa y N NE7thSt 124thAveSES 7th St SERento n IssaquahRd Rai ni er AveNNewcastle Way CoalCre ek PkwySESW 41st St Taylor Pl N WNESunsetBlvdWellsAveNUnionAveNEN E 3 r d S tHardie Av eSWS180th St Maple Valley Hwy 140thAveSES G ra d y W ayS 2 1 s tSt BensonRdSRento n AveS87thAveS128thAveSE148thAveSESW 43rd St SEC arrRd SE 168thSt Beacon Ave S 68thAveSLoganAveN108thAveSEForestDrSE S2ndSt 141s t AveSERainierAveS 156thAveSES E 183rdStBe n s o n Dr SS124th StS 43rd St Airport Way S W G ra dyW a y SE J o n es RdSunsetBlvdN Puget Dr SES E 204th W aySW 34th StMo n sterRdSW S E 1 4 2 n d P lWestValleyHwySSEMayValleyRd SunsetBlvdNS Carr RdHouserWayNNewcastleGolfClubRd S 133rd St WilliamsAveSWellsAveSEMercerWay154thPlSEDuvallAveNELoganAveSMonroeAveNESunsetBlvdNEEdmondsAveNEStevens AveNWRaini er AveSTalbotRdSOakesdaleAveSWTaylorAveNW164thAveSERainierAveSWestVall eyHwyWestValleyHwyParkAveN108thAveSE6 6th A v e S WM ercerWayWMercer W ay LakemontBl vdSE132ndAve SELakeWashingtonBlvdNE140thWaySE East Valley Rd68thAveS³City of RentonSensitive Areas 0 0.5 10.25 Miles Information Technology - GISmapsupport@rentonwa.govPrinted on: 11/12/2014 Data Sources: City of Renton, King County This document is a graphic representation, not guaranteedto survey accuracy, and is based on the best informationavailable as of the date shown. This map is intended forCity display purposes only. Renton City Limits k Education Fire Station K Valley Medical Center Steep SlopesPercent Range >15% & <=25% >25% & <=40% >40% & <=90% >90%Coordinate System: NAD 1983 HARN StatePlane Washington North FIPS 4601 FeetProjection: Lambert Conformal ConicDatum: North American 1983 HARN Core Design, Inc. WANG SHORT PLAT Page 34 Appendix C – Vault Sizing WWHM Vault Modeling Report WWHM2012 PROJECT REPORT Vault 1/30/2019 5:03:53 PM Page 2 General Model Information Project Name:Vault Site Name:Wang SP Site Address: City:Renton Report Date:1/30/2019 Gage:Seatac Data Start:1948/10/01 Data End:2009/09/30 Timestep:15 Minute Precip Scale:1.00 Version:2015/06/05 POC Thresholds Low Flow Threshold for POC1:50 Percent of the 2 Year High Flow Threshold for POC1:50 Year Vault 1/30/2019 5:03:53 PM Page 3 Landuse Basin Data Predeveloped Land Use Predeveloped Bypass:No GroundWater:No Pervious Land Use Acres C, Forest, Mod 2.047 C, Lawn, Mod 0.049 Pervious Total 2.096 Impervious Land Use Acres ROADS MOD 0.104 Impervious Total 0.104 Basin Total 2.2 Element Flows To: Surface Interflow Groundwater Vault 1/30/2019 5:03:53 PM Page 4 Mitigated Land Use Developed Bypass:No GroundWater:No Pervious Land Use Acres C, Lawn, Mod 1.1 Pervious Total 1.1 Impervious Land Use Acres ROADS MOD 1.1 Impervious Total 1.1 Basin Total 2.2 Element Flows To: Surface Interflow Groundwater Vault 1 Vault 1 Vault 1/30/2019 5:03:53 PM Page 5 Routing Elements Predeveloped Routing Vault 1/30/2019 5:03:53 PM Page 6 Mitigated Routing Vault 1 Width:41.75 ft. Length:114 ft. Depth:5.75 ft. Discharge Structure Riser Height:4.85 ft. Riser Diameter:12 in. Notch Type:Rectangular Notch Width:0.011 ft. Notch Height:1.200 ft. Orifice 1 Diameter:0.93 in.Elevation:0 ft. Orifice 2 Diameter:0.812 in.Elevation:2.65 ft. Orifice 3 Diameter:1 in.Elevation:3.1 ft. Element Flows To: Outlet 1 Outlet 2 Vault Hydraulic Table Stage(ft)Area(ac)Volume(ac-ft)Discharge(cfs)Infilt(cfs) 0.0000 0.109 0.000 0.000 0.000 0.0639 0.109 0.007 0.005 0.000 0.1278 0.109 0.014 0.008 0.000 0.1917 0.109 0.020 0.010 0.000 0.2556 0.109 0.027 0.011 0.000 0.3194 0.109 0.034 0.013 0.000 0.3833 0.109 0.041 0.014 0.000 0.4472 0.109 0.048 0.015 0.000 0.5111 0.109 0.055 0.016 0.000 0.5750 0.109 0.062 0.017 0.000 0.6389 0.109 0.069 0.018 0.000 0.7028 0.109 0.076 0.019 0.000 0.7667 0.109 0.083 0.020 0.000 0.8306 0.109 0.090 0.021 0.000 0.8944 0.109 0.097 0.022 0.000 0.9583 0.109 0.104 0.023 0.000 1.0222 0.109 0.111 0.023 0.000 1.0861 0.109 0.118 0.024 0.000 1.1500 0.109 0.125 0.025 0.000 1.2139 0.109 0.132 0.025 0.000 1.2778 0.109 0.139 0.026 0.000 1.3417 0.109 0.146 0.027 0.000 1.4056 0.109 0.153 0.027 0.000 1.4694 0.109 0.160 0.028 0.000 1.5333 0.109 0.167 0.029 0.000 1.5972 0.109 0.174 0.029 0.000 1.6611 0.109 0.181 0.030 0.000 1.7250 0.109 0.188 0.030 0.000 1.7889 0.109 0.195 0.031 0.000 1.8528 0.109 0.202 0.031 0.000 1.9167 0.109 0.209 0.032 0.000 1.9806 0.109 0.216 0.033 0.000 2.0444 0.109 0.223 0.033 0.000 2.1083 0.109 0.230 0.034 0.000 2.1722 0.109 0.237 0.034 0.000 Vault 1/30/2019 5:03:53 PM Page 7 2.2361 0.109 0.244 0.035 0.000 2.3000 0.109 0.251 0.035 0.000 2.3639 0.109 0.258 0.036 0.000 2.4278 0.109 0.265 0.036 0.000 2.4917 0.109 0.272 0.037 0.000 2.5556 0.109 0.279 0.037 0.000 2.6194 0.109 0.286 0.038 0.000 2.6833 0.109 0.293 0.041 0.000 2.7472 0.109 0.300 0.044 0.000 2.8111 0.109 0.307 0.046 0.000 2.8750 0.109 0.314 0.048 0.000 2.9389 0.109 0.321 0.049 0.000 3.0028 0.109 0.328 0.051 0.000 3.0667 0.109 0.335 0.052 0.000 3.1306 0.109 0.342 0.058 0.000 3.1944 0.109 0.349 0.063 0.000 3.2583 0.109 0.356 0.067 0.000 3.3222 0.109 0.363 0.070 0.000 3.3861 0.109 0.370 0.073 0.000 3.4500 0.109 0.377 0.075 0.000 3.5139 0.109 0.383 0.078 0.000 3.5778 0.109 0.390 0.080 0.000 3.6417 0.109 0.397 0.082 0.000 3.7056 0.109 0.404 0.085 0.000 3.7694 0.109 0.411 0.088 0.000 3.8333 0.109 0.418 0.091 0.000 3.8972 0.109 0.425 0.094 0.000 3.9611 0.109 0.432 0.098 0.000 4.0250 0.109 0.439 0.101 0.000 4.0889 0.109 0.446 0.105 0.000 4.1528 0.109 0.453 0.109 0.000 4.2167 0.109 0.460 0.113 0.000 4.2806 0.109 0.467 0.116 0.000 4.3444 0.109 0.474 0.120 0.000 4.4083 0.109 0.481 0.124 0.000 4.4722 0.109 0.488 0.128 0.000 4.5361 0.109 0.495 0.132 0.000 4.6000 0.109 0.502 0.136 0.000 4.6639 0.109 0.509 0.139 0.000 4.7278 0.109 0.516 0.144 0.000 4.7917 0.109 0.523 0.148 0.000 4.8556 0.109 0.530 0.157 0.000 4.9194 0.109 0.537 0.347 0.000 4.9833 0.109 0.544 0.665 0.000 5.0472 0.109 0.551 1.047 0.000 5.1111 0.109 0.558 1.443 0.000 5.1750 0.109 0.565 1.801 0.000 5.2389 0.109 0.572 2.081 0.000 5.3028 0.109 0.579 2.269 0.000 5.3667 0.109 0.586 2.427 0.000 5.4306 0.109 0.593 2.564 0.000 5.4944 0.109 0.600 2.694 0.000 5.5583 0.109 0.607 2.817 0.000 5.6222 0.109 0.614 2.935 0.000 5.6861 0.109 0.621 3.049 0.000 5.7500 0.109 0.628 3.158 0.000 5.8139 0.109 0.552 3.263 0.000 Vault 1/30/2019 5:03:53 PM Page 8 Vault 1/30/2019 5:03:53 PM Page 9 Analysis Results POC 1 + Predeveloped x Mitigated Predeveloped Landuse Totals for POC #1 Total Pervious Area:2.096 Total Impervious Area:0.104 Mitigated Landuse Totals for POC #1 Total Pervious Area:1.1 Total Impervious Area:1.1 Flow Frequency Method:Log Pearson Type III 17B Flow Frequency Return Periods for Predeveloped. POC #1 Return Period Flow(cfs) 2 year 0.096114 5 year 0.143661 10 year 0.179619 25 year 0.230283 50 year 0.271924 100 year 0.316998 Flow Frequency Return Periods for Mitigated. POC #1 Return Period Flow(cfs) 2 year 0.0464 5 year 0.074741 10 year 0.099461 25 year 0.138833 50 year 0.17502 100 year 0.21796 Annual Peaks Annual Peaks for Predeveloped and Mitigated. POC #1 Year Predeveloped Mitigated 1949 0.138 0.031 1950 0.139 0.050 1951 0.159 0.126 1952 0.069 0.028 1953 0.052 0.035 1954 0.074 0.037 1955 0.104 0.037 1956 0.099 0.064 1957 0.103 0.037 1958 0.078 0.044 Vault 1/30/2019 5:04:59 PM Page 10 1959 0.072 0.033 1960 0.137 0.104 1961 0.080 0.048 1962 0.048 0.027 1963 0.079 0.037 1964 0.099 0.037 1965 0.088 0.059 1966 0.067 0.035 1967 0.155 0.042 1968 0.097 0.035 1969 0.088 0.033 1970 0.083 0.035 1971 0.091 0.044 1972 0.130 0.083 1973 0.065 0.051 1974 0.097 0.044 1975 0.118 0.035 1976 0.092 0.038 1977 0.047 0.029 1978 0.071 0.046 1979 0.070 0.027 1980 0.202 0.096 1981 0.069 0.035 1982 0.145 0.081 1983 0.094 0.041 1984 0.062 0.031 1985 0.047 0.032 1986 0.131 0.065 1987 0.129 0.089 1988 0.052 0.031 1989 0.062 0.031 1990 0.314 0.114 1991 0.194 0.098 1992 0.085 0.048 1993 0.067 0.031 1994 0.038 0.026 1995 0.087 0.046 1996 0.212 0.128 1997 0.151 0.114 1998 0.076 0.031 1999 0.206 0.086 2000 0.081 0.046 2001 0.056 0.025 2002 0.095 0.071 2003 0.143 0.034 2004 0.134 0.122 2005 0.101 0.040 2006 0.101 0.051 2007 0.253 0.282 2008 0.273 0.132 2009 0.145 0.069 Ranked Annual Peaks Ranked Annual Peaks for Predeveloped and Mitigated. POC #1 Rank Predeveloped Mitigated 1 0.3141 0.2821 2 0.2726 0.1324 3 0.2534 0.1280 Vault 1/30/2019 5:04:59 PM Page 11 4 0.2118 0.1262 5 0.2065 0.1216 6 0.2016 0.1143 7 0.1941 0.1139 8 0.1593 0.1044 9 0.1552 0.0983 10 0.1512 0.0961 11 0.1455 0.0889 12 0.1447 0.0858 13 0.1426 0.0827 14 0.1385 0.0814 15 0.1376 0.0714 16 0.1369 0.0693 17 0.1340 0.0645 18 0.1310 0.0644 19 0.1298 0.0587 20 0.1290 0.0512 21 0.1185 0.0505 22 0.1044 0.0500 23 0.1028 0.0478 24 0.1011 0.0476 25 0.1006 0.0463 26 0.0991 0.0460 27 0.0989 0.0460 28 0.0974 0.0442 29 0.0971 0.0437 30 0.0953 0.0437 31 0.0944 0.0420 32 0.0918 0.0406 33 0.0912 0.0403 34 0.0885 0.0378 35 0.0884 0.0372 36 0.0865 0.0372 37 0.0853 0.0371 38 0.0827 0.0370 39 0.0814 0.0367 40 0.0801 0.0354 41 0.0790 0.0353 42 0.0778 0.0350 43 0.0756 0.0350 44 0.0741 0.0346 45 0.0719 0.0345 46 0.0714 0.0341 47 0.0695 0.0328 48 0.0689 0.0327 49 0.0688 0.0320 50 0.0670 0.0313 51 0.0666 0.0312 52 0.0651 0.0311 53 0.0625 0.0309 54 0.0621 0.0308 55 0.0559 0.0307 56 0.0522 0.0285 57 0.0518 0.0281 58 0.0480 0.0270 59 0.0474 0.0270 60 0.0466 0.0263 61 0.0383 0.0249 Vault 1/30/2019 5:04:59 PM Page 12 Vault 1/30/2019 5:04:59 PM Page 13 Duration Flows The Facility PASSED Flow(cfs)Predev Mit Percentage Pass/Fail 0.0481 8230 6485 78 Pass 0.0503 7445 5484 73 Pass 0.0526 6733 4688 69 Pass 0.0548 6079 4308 70 Pass 0.0571 5251 4057 77 Pass 0.0594 4774 3880 81 Pass 0.0616 4353 3679 84 Pass 0.0639 3968 3491 87 Pass 0.0661 3463 3151 90 Pass 0.0684 3146 2977 94 Pass 0.0707 2890 2770 95 Pass 0.0729 2642 2575 97 Pass 0.0752 2286 2289 100 Pass 0.0775 2110 2080 98 Pass 0.0797 1930 1923 99 Pass 0.0820 1757 1699 96 Pass 0.0842 1528 1440 94 Pass 0.0865 1394 1310 93 Pass 0.0888 1270 1216 95 Pass 0.0910 1111 1073 96 Pass 0.0933 1031 999 96 Pass 0.0955 954 865 90 Pass 0.0978 884 761 86 Pass 0.1001 783 672 85 Pass 0.1023 721 620 85 Pass 0.1046 664 554 83 Pass 0.1069 599 509 84 Pass 0.1091 523 450 86 Pass 0.1114 467 411 88 Pass 0.1136 430 368 85 Pass 0.1159 383 307 80 Pass 0.1182 322 255 79 Pass 0.1204 292 227 77 Pass 0.1227 251 184 73 Pass 0.1249 224 148 66 Pass 0.1272 190 108 56 Pass 0.1295 161 86 53 Pass 0.1317 145 73 50 Pass 0.1340 135 60 44 Pass 0.1362 117 54 46 Pass 0.1385 107 48 44 Pass 0.1408 98 45 45 Pass 0.1430 81 40 49 Pass 0.1453 70 38 54 Pass 0.1476 60 33 55 Pass 0.1498 52 24 46 Pass 0.1521 41 21 51 Pass 0.1543 34 19 55 Pass 0.1566 32 16 50 Pass 0.1589 29 13 44 Pass 0.1611 28 13 46 Pass 0.1634 25 11 44 Pass 0.1656 24 10 41 Pass Vault 1/30/2019 5:04:59 PM Page 14 0.1679 22 10 45 Pass 0.1702 19 9 47 Pass 0.1724 18 8 44 Pass 0.1747 18 8 44 Pass 0.1770 17 8 47 Pass 0.1792 17 8 47 Pass 0.1815 14 8 57 Pass 0.1837 13 8 61 Pass 0.1860 13 7 53 Pass 0.1883 12 7 58 Pass 0.1905 10 7 70 Pass 0.1928 10 7 70 Pass 0.1950 9 7 77 Pass 0.1973 9 7 77 Pass 0.1996 9 6 66 Pass 0.2018 9 6 66 Pass 0.2041 8 6 75 Pass 0.2063 8 6 75 Pass 0.2086 7 6 85 Pass 0.2109 7 5 71 Pass 0.2131 6 5 83 Pass 0.2154 6 5 83 Pass 0.2177 5 5 100 Pass 0.2199 5 5 100 Pass 0.2222 5 5 100 Pass 0.2244 5 5 100 Pass 0.2267 5 5 100 Pass 0.2290 5 5 100 Pass 0.2312 5 5 100 Pass 0.2335 5 4 80 Pass 0.2357 5 4 80 Pass 0.2380 5 4 80 Pass 0.2403 5 4 80 Pass 0.2425 5 4 80 Pass 0.2448 5 4 80 Pass 0.2470 4 4 100 Pass 0.2493 4 4 100 Pass 0.2516 4 4 100 Pass 0.2538 4 3 75 Pass 0.2561 3 2 66 Pass 0.2584 3 2 66 Pass 0.2606 3 2 66 Pass 0.2629 3 2 66 Pass 0.2651 3 2 66 Pass 0.2674 3 2 66 Pass 0.2697 3 2 66 Pass 0.2719 3 2 66 Pass Vault 1/30/2019 5:04:59 PM Page 15 Water Quality Water Quality BMP Flow and Volume for POC #1 On-line facility volume:0.1687 acre-feet On-line facility target flow:0.1949 cfs. Adjusted for 15 min:0.1949 cfs. Off-line facility target flow:0.1077 cfs. Adjusted for 15 min:0.1077 cfs. Vault 1/30/2019 5:04:59 PM Page 16 LID Report Vault 1/30/2019 5:05:38 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. Vault 1/30/2019 5:05:38 PM Page 18 Appendix Predeveloped Schematic Vault 1/30/2019 5:05:39 PM Page 19 Mitigated Schematic Vault 1/30/2019 5:05:39 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 Vault.wdm MESSU 25 PreVault.MES 27 PreVault.L61 28 PreVault.L62 30 POCVault1.dat END FILES OPN SEQUENCE INGRP INDELT 00:15 PERLND 11 PERLND 17 IMPLND 2 COPY 501 DISPLY 1 END INGRP END OPN SEQUENCE DISPLY DISPLY-INFO1 # - #<----------Title----------->***TRAN PIVL DIG1 FIL1 PYR DIG2 FIL2 YRND 1 Predeveloped 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 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 END ACTIVITY PRINT-INFO <PLS > ***************** Print-flags ***************************** PIVL PYR Vault 1/30/2019 5:05:39 PM Page 21 # - # 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 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 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 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 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 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 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 END GEN-INFO *** Section IWATER*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # ATMP SNOW IWAT SLD IWG IQAL *** 2 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 END PRINT-INFO IWAT-PARM1 <PLS > IWATER variable monthly parameter value flags *** # - # CSNO RTOP VRS VNN RTLI *** 2 0 0 0 0 0 END IWAT-PARM1 IWAT-PARM2 Vault 1/30/2019 5:05:39 PM Page 22 <PLS > IWATER input info: Part 2 *** # - # *** LSUR SLSUR NSUR RETSC 2 400 0.05 0.1 0.08 END IWAT-PARM2 IWAT-PARM3 <PLS > IWATER input info: Part 3 *** # - # ***PETMAX PETMIN 2 0 0 END IWAT-PARM3 IWAT-STATE1 <PLS > *** Initial conditions at start of simulation # - # *** RETS SURS 2 0 0 END IWAT-STATE1 END IMPLND SCHEMATIC <-Source-> <--Area--> <-Target-> MBLK *** <Name> # <-factor-> <Name> # Tbl# *** Predeveloped*** PERLND 11 2.047 COPY 501 12 PERLND 11 2.047 COPY 501 13 PERLND 17 0.049 COPY 501 12 PERLND 17 0.049 COPY 501 13 IMPLND 2 0.104 COPY 501 15 ******Routing****** END SCHEMATIC NETWORK <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> # <Name> # #<-factor->strg <Name> # # <Name> # # *** COPY 501 OUTPUT MEAN 1 1 48.4 DISPLY 1 INPUT TIMSER 1 <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> # <Name> # #<-factor->strg <Name> # # <Name> # # *** END NETWORK RCHRES GEN-INFO RCHRES Name Nexits Unit Systems Printer *** # - #<------------------><---> User T-series Engl Metr LKFG *** in out *** END GEN-INFO *** Section RCHRES*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # HYFG ADFG CNFG HTFG SDFG GQFG OXFG NUFG PKFG PHFG *** END ACTIVITY PRINT-INFO <PLS > ***************** Print-flags ******************* PIVL PYR # - # HYDR ADCA CONS HEAT SED GQL OXRX NUTR PLNK PHCB PIVL PYR ********* 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 *** Vault 1/30/2019 5:05:39 PM Page 23 <------><--------><--------><--------><--------><--------><--------> *** END HYDR-PARM2 HYDR-INIT RCHRES Initial conditions for each HYDR section *** # - # *** VOL Initial value of COLIND Initial value of OUTDGT *** ac-ft for each possible exit for each possible exit <------><--------> <---><---><---><---><---> *** <---><---><---><---><---> END HYDR-INIT END RCHRES SPEC-ACTIONS END SPEC-ACTIONS FTABLES END FTABLES EXT SOURCES <-Volume-> <Member> SsysSgap<--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> # <Name> # tem strg<-factor->strg <Name> # # <Name> # # *** WDM 2 PREC ENGL 1 PERLND 1 999 EXTNL PREC WDM 2 PREC ENGL 1 IMPLND 1 999 EXTNL PREC WDM 1 EVAP ENGL 0.76 PERLND 1 999 EXTNL PETINP WDM 1 EVAP ENGL 0.76 IMPLND 1 999 EXTNL PETINP END EXT SOURCES EXT TARGETS <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Volume-> <Member> Tsys Tgap Amd *** <Name> # <Name> # #<-factor->strg <Name> # <Name> tem strg strg*** COPY 501 OUTPUT MEAN 1 1 48.4 WDM 501 FLOW ENGL REPL END EXT TARGETS MASS-LINK <Volume> <-Grp> <-Member-><--Mult--> <Target> <-Grp> <-Member->*** <Name> <Name> # #<-factor-> <Name> <Name> # #*** MASS-LINK 12 PERLND PWATER SURO 0.083333 COPY INPUT MEAN END MASS-LINK 12 MASS-LINK 13 PERLND PWATER IFWO 0.083333 COPY INPUT MEAN END MASS-LINK 13 MASS-LINK 15 IMPLND IWATER SURO 0.083333 COPY INPUT MEAN END MASS-LINK 15 END MASS-LINK END RUN Vault 1/30/2019 5:05:39 PM Page 24 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 Vault.wdm MESSU 25 MitVault.MES 27 MitVault.L61 28 MitVault.L62 30 POCVault1.dat END FILES OPN SEQUENCE INGRP INDELT 00:15 PERLND 17 IMPLND 2 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 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 END ACTIVITY PRINT-INFO <PLS > ***************** Print-flags ***************************** PIVL PYR # - # ATMP SNOW PWAT SED PST PWG PQAL MSTL PEST NITR PHOS TRAC ********* Vault 1/30/2019 5:05:39 PM Page 25 17 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 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 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 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 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 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 END GEN-INFO *** Section IWATER*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # ATMP SNOW IWAT SLD IWG IQAL *** 2 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 END PRINT-INFO IWAT-PARM1 <PLS > IWATER variable monthly parameter value flags *** # - # CSNO RTOP VRS VNN RTLI *** 2 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 END IWAT-PARM2 IWAT-PARM3 <PLS > IWATER input info: Part 3 *** Vault 1/30/2019 5:05:39 PM Page 26 # - # ***PETMAX PETMIN 2 0 0 END IWAT-PARM3 IWAT-STATE1 <PLS > *** Initial conditions at start of simulation # - # *** RETS SURS 2 0 0 END IWAT-STATE1 END IMPLND SCHEMATIC <-Source-> <--Area--> <-Target-> MBLK *** <Name> # <-factor-> <Name> # Tbl# *** Developed*** PERLND 17 1.1 RCHRES 1 2 PERLND 17 1.1 RCHRES 1 3 IMPLND 2 1.1 RCHRES 1 5 ******Routing****** PERLND 17 1.1 COPY 1 12 IMPLND 2 1.1 COPY 1 15 PERLND 17 1.1 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> # # *** 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 *** <------><--------><--------><--------><--------><--------><--------> *** Vault 1/30/2019 5:05:39 PM Page 27 1 1 0.02 0.0 0.0 0.5 0.0 END HYDR-PARM2 HYDR-INIT RCHRES Initial conditions for each HYDR section *** # - # *** VOL Initial value of COLIND Initial value of OUTDGT *** ac-ft for each possible exit for each possible exit <------><--------> <---><---><---><---><---> *** <---><---><---><---><---> 1 0 4.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 END HYDR-INIT END RCHRES SPEC-ACTIONS END SPEC-ACTIONS FTABLES FTABLE 1 91 4 Depth Area Volume Outflow1 Velocity Travel Time*** (ft) (acres) (acre-ft) (cfs) (ft/sec) (Minutes)*** 0.000000 0.109263 0.000000 0.000000 0.063889 0.109263 0.006981 0.005932 0.127778 0.109263 0.013961 0.008390 0.191667 0.109263 0.020942 0.010275 0.255556 0.109263 0.027923 0.011865 0.319444 0.109263 0.034903 0.013265 0.383333 0.109263 0.041884 0.014532 0.447222 0.109263 0.048865 0.015696 0.511111 0.109263 0.055846 0.016780 0.575000 0.109263 0.062826 0.017797 0.638889 0.109263 0.069807 0.018760 0.702778 0.109263 0.076788 0.019676 0.766667 0.109263 0.083768 0.020551 0.830556 0.109263 0.090749 0.021390 0.894444 0.109263 0.097730 0.022197 0.958333 0.109263 0.104710 0.022976 1.022222 0.109263 0.111691 0.023730 1.086111 0.109263 0.118672 0.024460 1.150000 0.109263 0.125653 0.025169 1.213889 0.109263 0.132633 0.025859 1.277778 0.109263 0.139614 0.026531 1.341667 0.109263 0.146595 0.027186 1.405556 0.109263 0.153575 0.027826 1.469444 0.109263 0.160556 0.028451 1.533333 0.109263 0.167537 0.029063 1.597222 0.109263 0.174517 0.029662 1.661111 0.109263 0.181498 0.030250 1.725000 0.109263 0.188479 0.030826 1.788889 0.109263 0.195460 0.031392 1.852778 0.109263 0.202440 0.031947 1.916667 0.109263 0.209421 0.032494 1.980556 0.109263 0.216402 0.033031 2.044444 0.109263 0.223382 0.033559 2.108333 0.109263 0.230363 0.034080 2.172222 0.109263 0.237344 0.034592 2.236111 0.109263 0.244324 0.035097 2.300000 0.109263 0.251305 0.035595 2.363889 0.109263 0.258286 0.036086 2.427778 0.109263 0.265266 0.036570 2.491667 0.109263 0.272247 0.037048 2.555556 0.109263 0.279228 0.037520 2.619444 0.109263 0.286209 0.037986 2.683333 0.109263 0.293189 0.041714 2.747222 0.109263 0.300170 0.044481 2.811111 0.109263 0.307151 0.046534 2.875000 0.109263 0.314131 0.048284 2.938889 0.109263 0.321112 0.049853 3.002778 0.109263 0.328093 0.051298 3.066667 0.109263 0.335073 0.052651 3.130556 0.109263 0.342054 0.058674 3.194444 0.109263 0.349035 0.063491 3.258333 0.109263 0.356016 0.067120 Vault 1/30/2019 5:05:39 PM Page 28 3.322222 0.109263 0.362996 0.070242 3.386111 0.109263 0.369977 0.073056 3.450000 0.109263 0.376958 0.075653 3.513889 0.109263 0.383938 0.078085 3.577778 0.109263 0.390919 0.080386 3.641667 0.109263 0.397900 0.082579 3.705556 0.109263 0.404880 0.085155 3.769444 0.109263 0.411861 0.088179 3.833333 0.109263 0.418842 0.091425 3.897222 0.109263 0.425823 0.094826 3.961111 0.109263 0.432803 0.098343 4.025000 0.109263 0.439784 0.101949 4.088889 0.109263 0.446765 0.105624 4.152778 0.109263 0.453745 0.109353 4.216667 0.109263 0.460726 0.113122 4.280556 0.109263 0.467707 0.116920 4.344444 0.109263 0.474687 0.120738 4.408333 0.109263 0.481668 0.124565 4.472222 0.109263 0.488649 0.128395 4.536111 0.109263 0.495629 0.132220 4.600000 0.109263 0.502610 0.136033 4.663889 0.109263 0.509591 0.139931 4.727778 0.109263 0.516572 0.144235 4.791667 0.109263 0.523552 0.148603 4.855556 0.109263 0.530533 0.157164 4.919444 0.109263 0.537514 0.347837 4.983333 0.109263 0.544494 0.665150 5.047222 0.109263 0.551475 1.047255 5.111111 0.109263 0.558456 1.442985 5.175000 0.109263 0.565436 1.801423 5.238889 0.109263 0.572417 2.081824 5.302778 0.109263 0.579398 2.269906 5.366667 0.109263 0.586379 2.427179 5.430556 0.109263 0.593359 2.564314 5.494444 0.109263 0.600340 2.694143 5.558333 0.109263 0.607321 2.817726 5.622222 0.109263 0.614301 2.935891 5.686111 0.109263 0.621282 3.049298 5.750000 0.109263 0.628263 3.158482 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 Vault 1/30/2019 5:05:39 PM Page 29 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 Vault 1/30/2019 5:05:39 PM Page 30 Predeveloped HSPF Message File Vault 1/30/2019 5:05:39 PM Page 31 Mitigated HSPF Message File Vault 1/30/2019 5:05:39 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