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HomeMy WebLinkAboutTIR.pdfSazei Design Group LLC 17217 7th Avenue W. Bothell, WA. 98012 (206) 390-8374 Fax: (425) 741-8214 Avon 2-Lot Short Plat LUR 18-000204 & C19000481 Drainage Design Report, O&M Manual & SWPP Report Property Location: 1909 NE 14th Street Renton, WA January 10, 2019 Revised: April 9, 2019 Prepared for: Avon Development DEVELOPMENT ENGINEERING jchavez 10/18/2019 Deccio Engineering Inc Page i TABLE OF CONTENTS SECTION 1 PROJECT OVERVIEW o Figure 1: TIR Worksheet o Figure 2: Site Location Map o Figure 3: Existing Site Conditions SECTION 2 CONDITIONS & REQUIREMENTS SUMMARY  City of Renton Requirements SECTION 3 OFF-SITE ANALYSIS  Sensitive Areas Map  Drainage Complaint Map o Figure 4: Upstream and Downstream Flow Map o Figure 5: Downstream System Table SECTION 4 FLOW CONTROL & WATER QUALITY ANALYSIS AND DESIGN o Figure 6: Soils Logs o Figure 7: Developed Conditions Map o Infiltration Requirements o Soil Management Plan SECTION 5 CONVEYANCE SYSTEM ANALYSIS AND DESIGN SECTION 6 SPECIAL REPORTS AND STUDIES SECTION 7 OTHER PERMITS SECTION 8 CSWPPP ANALYSIS AND DESIGN SECTION 9 BONDS, SUMMARIES AND COVENANTS SECTION 10 OPERATIONS AND MAINTENANCE MANUAL  Operations and Maintenance Procedures BOND QUANTITY WORKSHEETS Drainage Technical Information Report Revised April 4, 1019 1 | P a g e TIR SECTION 1 PROJECT OVERVIEW Project: Avon Development 2-lot Short Plat Site Information: The proposed project is the construction of a 2-lot short plat. The site is located 1909 NE 14th Street, Renton WA. More generally the site is located within SE ¼ of of the SE ¼ of Section 05, Township 23 North, Range 05 East, W.M., see Figure 2: Vicinity Map. The site is bordered by residential lots on the south, east, and west sides of the site. Pre-developed Site Conditions: The site is 11,960 sf and contains an existing home, driveway, patio and walkway and landscaping with a total existing impervious area of 4,254 sf. The lot slopes from north-east to south-west with all runoff leaving the site along the south-west property line. There are no known sensitive areas on site. The soils report prepared for the site show the site soils to be till and not suitable for infiltration . Please refer to Figure 3: Existing Conditions Map.. Developed Site Conditions: The project will consist of construction of a 2-lot short plat with two single family dwellings and driveways. Half Street frontage improvements in the form of curbs, gutters, sidewalks and landscape strip will be required on NE 14th Street. Please refer to Figure 7: Developed Conditions Map Since the impervious area exceeds the 5,000 sf threshold, flow control is required unless under Section 1.2.3 of the 2017 RSWDM it can be demonstrated that the project generates less than 0.15 cfs increase in flow in the existing site conditions using the WWHM12 with 15-minute time steps. Based on the modeling, the increase in flow is just under 0.15 cfs and therefore qualifies for Small Site Drainage review u nder Section 1.1.2.1 “Small Site Drainage Review” per Appendix “C” (See TIR Section 4 of this report) The project will use the Design Requirement’s under “Appendix C” of the 2017 City of Renton Surface Water Design Manual. Specifically, Section C.1.3.2 for small lots under 22,000 sf Drainage Technical Information Report Revised April 4, 1019 2 | P a g e Figure 1: TIR Worksheet Drainage Technical Information Report Revised April 4, 1019 3 | P a g e Figure 1: TIR Worksheet Drainage Technical Information Report Revised April 4, 1019 4 | P a g e Figure 1: TIR Worksheet Drainage Technical Information Report Revised April 4, 1019 5 | P a g e Figure 1: TIR Worksheet Drainage Technical Information Report Revised April 4, 1019 6 | P a g e Figure 1: TIR Worksheet Drainage Technical Information Report Revised April 4, 1019 7 | P a g e Figure 2: Site Location Map Drainage Technical Information Report Revised April 4, 1019 8 | P a g e Figure 3: Drainage Basins, Sub-basins and Site Characteristics Drainage Technical Information Report Revised April 4, 1019 9 | P a g e Figure 3 Con’t: Drainage Basins, Sub-basins and Site Characteristics Drainage Technical Information Report Revised April 4, 1019 10 | P a g e Figure 4. Soils Memo Drainage Technical Information Report Revised April 4, 1019 11 | P a g e Drainage Technical Information Report Revised April 4, 1019 12 | P a g e Drainage Technical Information Report Revised April 4, 1019 13 | P a g e Drainage Technical Information Report Revised April 4, 1019 14 | P a g e Drainage Technical Information Report Revised April 4, 1019 15 | P a g e TIR SECTION 2 CONDITIONS & REQUIREMENTS SUMMARY The City of Renton has adopted the City of Renton 2017 storm water manual which governs the design of stormwater systems to serve this project. The Core and Special Requirements are being met in the following manner: City of Renton 2017 storm water manual Core Requirements: 1. Discharge at the Natural Location Under 1.2.1-2, The surveyed contours show all runoff leaves the site towards the south- west. The drainage design proposes to use BMP’s to address the runoff with the flow leaving the site along the south-west side maintaining the natural discharge location. 2. Off-site Analysis The Level 1 downstream analysis showed that there will be minimal impacts on the downstream conditions, since the site proposes to use small site BMP’s to address all stormwater runoff. 3. Flow Control The site is exempt from flow control and will provide BMP’s as outlined in Appendix C Small Site Drainage requirements. 4. Conveyance System A new 12-inch storm pipe is required on the frontage improvements on NE 14th Street. The flow is minimal since it only picks up 106 feet of the roadway and the on-site improvements . 5. Temporary Erosion & Sediment Control All TESC measures proposed will conform to the 2017 RSWDM during construction, Refer to Section 9 of this TIR for additional information. The measures shown on the TESC plans include: Clearing limits, sediment control, soil stabilization, BMP’s maintenance and construction sequence 6. Maintenance & Operations Maintenance and Operations manual has been provided. Note that a “Declaration of Covenant” may be required. See Section 10. 7. Financial Guarantees & Liability A completed bond quantity worksheet is provided 8. Water Quality Since new pollution generating impervious surface is less than 5,000 sf, water quality is not required. Refer to Section 4 of this report. 9. On-Site BMP’s Onsite including perforated downspout connections will be used to address the on-site stormwater runoff Drainage Technical Information Report Revised April 4, 1019 16 | P a g e City of Renton 2017 storm water manual Special Requirements: 1. Other Adopted Area-Specific Requirements There are no area-specific requirements for this project site. 2. Floodplain/Floodway Delineation A review of the FEMA FIRM panels for the site, shows that the site and area of work is outside any floodplain areas and site does not contain any floodplain/floodway delineations. 3. Flood Protection Facilities There are no flood protection facilities located on or directly adjacent to the site. 4. Source Control This final site does not meet the threshold for source control requirements. 5. Oil Control This final site does not meet the threshold for oil control requirements. 6. Aquifer Protection Area The site falls within an aquifer protection area. However, due to soils type no infiltration is proposed. Drainage Technical Information Report Revised April 4, 1019 17 | P a g e City of Renton Conditions FINDINGS/CONCLUSIONS: To be determined TIR SECTION 3 OFF-SITE ANALYSIS TASK 1 – STUDY AREA DEFINITIONS AND MAPS Overview This section of the TIR is a Level 1 Downstream Analysis per the City of Renton 2017 storm water manual Section 2.3. The project will consist of construction of a 2 -lot short plat with two single family dwellings and driveways. Half Street frontage improvements in the form of cu rbs, gutters, sidewalks and landscape strip will be required on NE 14th Street., see Figure 2: Vicinity Map. The site is bordered by residential lots on the north, south, east, and west sides of the site. Upstream Drainage Analysis / Upstream Contributing Area Based on the site contours, there is no off-site drainage from upstream areas draining onto the site. To the north is NE 14th Street which serves to intercept any off-site runoff from the north. The site itself slopes from north to south-west eliminating any off-site runoff from the east and west sides of the site. Therefore the drainage is limited to the site itself. TASK 2 – RESOURCE REVIEW Adopted Basin Plan The site is located in the East Lake Washington Basin which flows into Puget Sound. Community Plan The site is located in the East Lake Washington Basin Planning Area. Basin Reconnaissance Summary Report We are not aware of a current Basin Reconnaissance Summary Report for this area. Critical Drainage Area The site is not considered to be within a critical drainage area as defined by the 2017 RSWDM. A review of the DOE “water quality assessment” web site shows that the section of the site discharges into is not on the DOE 303(d) list. Sensitive Area Maps Per City of Renton the site does contain areas of steep slope with a potential for landslide hazard sensitive areas. (See “Sensitive Areas Map”) Drainage Technical Information Report Revised April 4, 1019 18 | P a g e Soils Survey The soils logs for the site show the site soils to be a till and not suitable for infiltration Wetland / Stream Inventory No known wetlands or streams exist with-in the area of grading. A review of the FEMA FIRM panels for the site, shows that the site and area of work is outside any floodplain areas and site does not contain any floodplain/floodway delineations. Drainage Complaints There appeared to be no drainage complaints downstream of the site.. (See “Drainage Complaints Map”) TASK 3 – FIELD INSPECTION A Level 1 site inspection was performed on November 15, 2017. The weather was overcast with temperatures around 55 degrees. The inspection focused on identifying potential downstream drainage and water quality problems As previously indicated, the site slopes to the south-west with all runoff leaving along the south side of the site TASK 4 – DRAINAGE SYSTEM DESCRIPTION, AND PREDICTED DRAINAGE AND WATER QUALITY PROBLEMS OFFSITE LEVEL ONE DOWNSTREAM ANALYSIS 1. The runoff leaves the property along the south-west side then sheet flows south with: Overland flow for a distance of 800 feet south-west, where it flows into the storm system serving I-405. 2. The I-405 drainage system then flows west through the NE Park Drive and I-405 intersection for a distance of 1,000 feet, then west along the north side of NE Park Drive. 3. It then turns north and flows under Lake Washington Blvd discharging into a stream. 4. This stream flows for a distance of 1,500 feet though Gene Coulon Memorial park before discharging into the south end of Lake Washington. 3,500 feet away The total distance covered is just over 1-mile Note: There was no access to most of the downstream area. These areas were on private property or on I-405 right of way and not accessible to inspection. Basin 1 Predicted Drainage and Water Quality Problems The steep slopes located along the freeway may have erosion issues. However, since most of the Drainage Technical Information Report Revised April 4, 1019 19 | P a g e downstream including the discharge locations were on private property and not accessible to inspection, no drainage issues could be confirmed. TASK 5 MITIGATION OF EXISTING OR POTENTIAL PROBLEMS The project proposes to use small site BMP’s to address the storm water runoff from the proposed site improvements, thus mitigating any downstream impacts. Figure 5: Upstream Area and Downstream Flow Map Drainage Technical Information Report Revised April 4, 1019 20 | P a g e Figure 6: Downstream System Table F i g u r e 5 Drainage Technical Information Report Revised April 4, 1019 21 | P a g e Drainage Complaints Drainage Technical Information Report Revised April 4, 1019 22 | P a g e Erosion Hazard Map Drainage Technical Information Report Revised April 4, 1019 23 | P a g e Landslide Hazard Map Drainage Technical Information Report Revised April 4, 1019 24 | P a g e TIR SECTION 4 FLOW CONTROL & WATER QUALITY ANALYSIS AND DESIGN The project will consist of construction of a 2 -lot short plat with two single family dwellings and driveways. Half Street frontage improvements in the form of curbs, gutters, sidewalks and landscape strip will be required on NE 14th Street. Since the impervious area exceeds the 5,000 sf threshold, flow control is required unless under Section 1.2.3 of the 2017 RSWDM it can be demonstrat ed that the project generates less than 0.15 cfs increase in flow in the existing site conditions using the WWHM12 with 15-minute time steps. WWHM12 HYDRAULIC ANALYSIS OF SITE: Since the site is proposing to add more that 5,000 sf of new impervious, the site must demonstrate that there will be less than 0.15 cfs increase in flow using WWHM12 program with 15-minute time steps. The existing home is approximately 60-years old. Under the modeling assumptions, the existing site conditions can be the current cover. Total Area: 0.31 acres = (0.275 acres (site) + 0.035 acres (R/W)) The following information was used in the hydraulic analysis: Existing Site Conditions:  Existing Impervious 0.086 acres (Modeled as roof)  Existing pervious: 0.224 acres (Modeled as lawn) Total 0.310 acres forest Developed Site Conditions The Proposed Impervious Area  Lot A: (Roof: Patios & Walks: Drives) 2,985 sf  Lot B: (Roof: Patios & Walks: Drives) 3,082 sf  NE 14th ST: (Pavement: S-walk) 1,490 sf Total Impervious Area: 7,557 sf or 0.17 acres The Proposed Landscape Area  Site & Right of Way: (Lawn/landscape) 5,947 sf or 0.14 acres Total Site Area: 13,504 sf or 0.31 acres WWHM12 Results  0.1862 cfs (Mitigated Flows) – 0.1553 cfs (Predeveloped Flows) = 0.0309 cfs Increase Therefore, the site is exempt from detention Drainage Technical Information Report Revised April 4, 1019 25 | P a g e WWHM12 Results Drainage Technical Information Report Revised April 4, 1019 26 | P a g e Drainage Technical Information Report Revised April 4, 1019 27 | P a g e Drainage Technical Information Report Revised April 4, 1019 28 | P a g e Under Section 1.1.2.1 “Small Site Drainage Review” “Threshold” 1st Paragraph The project is under the o.15 cfs threshold and is exempt from detention. Per Appendix C Section C.1.3.1, the following BMP’s were reviewed and analyzed for use:  Full Infiltration: The soils were found to not be suitable for infiltration.  Limited Infiltration: The soils were found to not be suitable for infiltration.  Rain Gardens: Not feasible due to site constraints and with NO safe overflow path (overflow would be onto adjacent properties.)  Bioretention: Not feasible due to site constraints and with NO safe overflow (overflow would be onto adjacent properties)  Permeable Pavement: The soils are not suitable for infiltration.  Basic Dispersion: (Splash Locks, Rock Pads, Gravel Filled Trenches, Sheet Flow) Based on the total roof area of approximately 5,000 sf a total 8 splash blocks are required and the 25-foot flow paths cannot be met without overlapping the flow from each other..  Reduced Impervious Surface Credit: The amount of impervious area is just enough to allow driveway access and parking. Reducing the impervious area would still not allow for the above BMP’s to be implemented.  Native Growth Retention Credit: Not feasible due to the small area of each lot.  Tree reduction Credit: not feasible, the site has no significate trees.  Soil Amendment BMP’s: Will be used on site  Perforated Pipe Connection: Will be used. Due to the site constraints and soils type the only BMP that is feasible is having all downspouts tied into perforated stub outs prior to discharging into the street’s storm drain system The project will use the BMP’s as outlined in the Small Site Drainage Design under “Appendix C” of the City of Renton 2017 storm water manual. Specifically, Section C.1.3.2 for small lots under 22,000 sf Water Quality Exemption Since the total PGIS surface is less than 5,000 sf threshold, the site is exempt from water quality Drainage Technical Information Report Revised April 4, 1019 29 | P a g e Figure 7: Developed Conditions Drainage Technical Information Report Revised April 4, 1019 30 | P a g e TIR SECTION 5 CONVEYANCE SYSTEM ANALYSIS AND DESIGN PIPE CAPACITY: ROADWAY The 12- DI pipe from the roadway from CB-2 to CB-3 which has the shallowest slope at 2.0% was sized to handle the runoff from the 100-year storm from both the roadway and site improvements. (See “Pipe Conveyance Charts”) at the back of report The pipe will convey the runoff of impervious area from the two lots and the half street area and driveways and the roadway east of the site from NE 14th Street. The total impervious area to be conveyed is 0.41 acres, which includes the upstream right of way to the nearest catch basin located 40 -feet east of the site; With a 100-yr flow of 0.26 cfs from the SBUH Results (shown below). Using D.O.T. Chart 35 "Design Charts For Open Channel Flow": 12" DI Pipe Slope: 2.00 % Minimum Slope, Mannings: n = .012 100-Year Dev. Flows: 0.26 cfs Design Flow Capacity Results: 12" Pipe Capacity: = 5.5 cfs (flowing full) > 0.26 cfs required Velocity: = 3.25 fps > 3.00 fps required Therefore the 12" DI is adequate. &k0S 4/4/19 8:32:36 pm Deccio Engineering Inc page 1 BASIN SUMMARY BASIN ID: 100-DEV NAME: 100-YR DEV SBUH METHODOLOGY TOTAL AREA.......: 0.41 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE....: TYPE1A PERV IMP PRECIPITATION....: 3.60 inches AREA..: 0.14 Acres 0.27 Acres TIME INTERVAL....: 10.00 min CN....: 86.00 98.00 TC....: 14.23 min 5.00 min ABSTRACTION COEFF: 0.20 TcReach - Sheet L: 100.00 ns:0.1500 p2yr: 1.70 s:0.0200 TcReach – Pipe L: 125.00 kc:42.00 s:0.0050 PEAK RATE: 0.26 cfs VOL: 0.29 Ac-ft TIME: 480 min Drainage Technical Information Report Revised April 4, 1019 31 | P a g e TIR SECTION 6 SPECIAL REPORTS AND STUDIES None Required. TIR SECTION 7 OTHER PERMITS Below is the list of anticipated permits required for this project. Other permits may be required that are not mentioned below. Building Permit – New Single Family Residence Drainage Technical Information Report Revised April 4, 1019 32 | P a g e TIR SECTION 8 CSWPPP ANALYSIS AND DESIGN For the purposes of this report, several standard erosion control procedures will be utilized by the contractor to minimize the amount of erosion and sedimentation perpetuated by the construction of the site. Furthermore, these techniques are proposed for the Construction Stormwater Pollution Prevention Plan (CSWPPP) and should be reviewed and instituted by the onsite contractor. Some of the measures include filter fabric fence, and standard ground cover practices, A construction sequence will also be used to minimize the impacts of erosion due to construction. ESC Plan Analysis and Design (Part A) 1. At just under 12,000 sf the site is small requiring only minimal ESC measures. The 12- Elements of a Construction CSWPPP listed below, discuss and describe the appropriate ESC measure to be used. 2. Due to the small size of the site, no ESC facilities are proposed. Therefore, no analysis of the site’s ESC facilities was required. The proposed BMPs consist of standard items including: filter fences, construction entrance, CB inlet protection and pla stic cover, etc. No sediment traps are proposed. 3. The site is fairly flat and the areas of high erosion are minimal and will be controlled by the filter fence around the perimeter of the site. 4. There were no special reports done for the site. 5. No exceptions or modifications are proposed of the “Erosion and Sedimentation Control Standards” ESC Plan Analysis and Design (Part B) A full SWPP Plan and report will be prepared for the site after preliminary approval is received. THE 13 ELEMENTS OF A CONSTRUCTION CSWPPP 1. Preserve Vegetation/Mark Clearing Limits: The clearing limits are indicated on the plan sheet. Furthermore, clearing and grading will be limited to only areas that need to be disturbed for grading/construction of the road surface to preserve as much natural vegetation as possible. Field marking the clearing limits shall be completed prior to clearing and grubbing activities. BMP's: Preserve Natural Vegetation (VEG) Field Marking Clearing Limits (CL) 2. Establish Construction Access: Access to the construction site shall be limited to the rock construction entrance. The construction entrance shall be extended to provide access to the construction vehicle/equipment staging and employee parking areas. BMP's: Stabilized Construction Entrance (CE) 3. Control of Flow Rates: Storm water detention: No detention is proposed for the site since the increase in volume is minimal 4. Installation of Perimeter Sediment Controls: Sediment control will be provided through a combination of filtration through the surround on-site vegetation, filter fence, straw bails, BMP's: Silt Fence (FF) 5. Soils Stabilization: Temporary and permanent soil stabilization will be provided. Temporary stabilization will be provided through the application of straw and/or plastic sheeting to exposed, worked earth. From October 1 until April 30, no exposed soil may remain exposed and unworked for more than two days; after May 1, no exposed soil may remain exposed and unworked for more than seven days. Drainage Technical Information Report Revised April 4, 1019 33 | P a g e BMP's: Plastic Sheeting, 6. Slope Protection: Slopes shall be protected from erosion through cover and prevention of concentrated surface runoff flows. BMP's: Plastic Sheeting, 7. Protection of Permanent Drain Inlets and Dust/Mud Control: Inlet protection will be provided for all catch basins. BMP’s: Inlet Protection BMP’s: Street Sweeping and watering of dust areas 8. Stabilization of Channels and Outlets: All channel slopes shall be constructed and protected against erosion in accordance with City of Renton BMP's: None required 9. Pollutant Control: Pollutants shall be controlled as described in the Potential Pollutants section of this SWPPP. 10. Dewatering Control: De-watering: Interception of the water table is not expected to occur, even if there is an increase in precipit ation. However, should ground water flows be encountered, the flows can be directed to on site native vegetation for cleanup. BMP's: Native vegetation (As Required) 11. BMP Maintenance: All BMP's and SWPPP elements shall be inspected daily and maintained as required. 12. Project Management: The project shall be managed in a cooperative effort by the project manager, contractor, engineer, and the county inspector. During the construction process, if unforeseen issues arise that cannot be resolved on site, construction activity (other than SWPPP maintenance) shall be halted and the county inspector and the project engineer are to be contacted and informed of the situation. The Erosion Control Lead TBD 13. Protect On-Site Stormwater Management BMPs For Runoff From Roofs And Other Hard Surface On-site stormwater management BMPs used for runoff from roofs and other hard surfaces include: full dispersion, roof downspout full infiltration or dispersion systems, perforated stubout connections, rain gardens, bioretention systems, permeable pavement, sheetflow dispersion, and concentrated flow dispersion. The areas on the site to be used for these BMPs shall be protected from siltation and compaction during construction by sequencing the construction in a fashion to install these BMPs at the latter part of the construction grading operations, by excluding equipment from the BMPS and the associated areas, and by using the erosion and sedimentation control BMPs. BMP C102: Buffer Zone Since the project is for residential lots, under SCC 30.63 A.530, (2) the project does not fall under the “High Use Sites” covering commercial or industrial sites. BMP C-151: Concrete Handling (Design and Installation Specifications) Concrete truck chutes, pumps, and internals shall be washed out only into formed areas awaiting installation of concrete or asphalt. Unused concrete remaining in the truck and pump shall be returned to the originating batch plant for recycling. Hand tools including, but not limited to, screeds, shovels, rakes, floats, and trowels shall be washed off only into formed areas awaiting installation of concrete or asphalt. Equipment that cannot be easily moved, such as concrete pavers, shall only be washed in areas that do not directly drain to natural or constructed stormwater conveyances. Washdown from areas such as concrete aggregate driveways shall not drain directly to natural or Drainage Technical Information Report Revised April 4, 1019 34 | P a g e constructed stormwater conveyances. When no formed areas are available, washwater and leftover product shall be contained in a lined container. Contained concrete shall be disposed of in a manner that does not violate groundwater or surface water quality standards Maintenance Standards: Containers shall be checked for holes in the liner daily during concrete pours and repaired the same day Soil Management Plan for “Post Construction Soil Standard” The top soils will be stockpile on-site and reused per “Implementation Options #4b “Amend existing soil in place per the Post Construction Soil Standard” which requires “Stockpile existing top soils during grading and replace it prior to planting…” In addition, the soils will be required to be tested for organic compliance. See the following requirements. Drainage Technical Information Report Revised April 4, 1019 35 | P a g e Drainage Technical Information Report Revised April 4, 1019 36 | P a g e Drainage Technical Information Report Revised April 4, 1019 37 | P a g e Amend Existing Soils, Purpose and Definition Naturally occurring (undisturbed) soil and vegetation provide important stormwater functions including: water infiltration; nutrient, sediment, and pollutant adsorption; sediment and pollutant biofiltration; water interflow storage and transmission; and pollutant decomposition. These functions are largely lost when development strips away native soil and vegetation and replaces it with minimal topsoil and sod. Not only are these important stormwater functions lost, but such landscapes themselves become pollution- generating pervious surfaces due to increased use of pesticides, fertilizers and other landscaping and household/industrial chemicals, the concentration of pet wastes, and pollutants that accompany roadside litter. Establishing soil quality and depth regains greater stormwater functions in the post development landscape, provides increased treatment of pollutants and sediments that result from development and habitation, and minimizes the need for some landscaping chemicals, thus reducing pollution through prevention. Applications and Limitations Establishing a minimum soil quality and depth is not the same as preservation of naturally occurring soil and vegetation. However, establishing a minimum soil quality and depth will provide improved on-site management of stormwater flow and water quality. Soil organic matter can be attained through numerous materials such as compost, composted woody material, biosolids, and forest product residuals. It is important that the materials used to meet the soil quality and depth BMP be appropriate and beneficial to the plant cover to be established. Likewise, it is important that imported topsoils improve soil conditions and do not have an excessive percent of clay fines. Design Guidelines Soil retention. The duff layer and native topsoil should be retained in an undisturbed state to the maximum extent practicable. In any areas requiring grading remove and stockpile the duff layer and topsoil on site in a designated, controlled area, not adjacent to public resources and critical areas, to be reapplied to other portions of the site where feasible. Soil quality. All areas subject to clearing and grading that have not been covered by impervious surface, incorporated into a drainage facility or engineered as structural fill or slope shall, at project completion, demonstrate the following: I. A topsoil layer with a minimum organic matter content of ten percent dry weight in planting beds, and 5% organic matter content (based on a loss-on-ignition test) in turf areas, and a pH from 6.0 to 8.0 or matching the pH of the original undisturbed soil. The topsoil layer shall have a minimum depth of eight inches except where tree roots limit the depth of incorporation of amendments needed to meet the criteria. Subsoils below the topsoil layer should be scarified at least 4 inches with some incorporation of the upper material to avoid stratified layers, where feasible. 2. Planting beds must be mulched with 2 inches of organic material 3. Quality of compost and other materials used to meet the organic content requirements: a. The organic content for -pre-approved” amendment rates can be met only using compost that meets the definition of -composted materials” in WAC I73-350-220. This code is available online at: http://www.ecy.wa.gov/programs/swfa/facilities/350.html. Compost used in bioretention areas should be stable, mature and derived from yard debris, wood waste, or other organic materials that meet the intent of the organic soil amendment specification. Biosolids and manure composts can be higher in bio-available phosphorus than compost derived from yard or plant waste and therefore Drainage Technical Information Report Revised April 4, 1019 38 | P a g e are not allowed in bioretention areas due to the possibility of exporting bio-available phosphorus in effluent. The compost must also have an organic matter content of 35% to 65%, and a carbon to nitrogen ratio below 25:I. The carbon to nitrogen ratio may be as high as 35:I for plantings composed entirely of plants native to the Puget Sound Lowlands region. b. Calculated amendment rates may be met through use of composted materials as defined above; or other organic materials amended to meet the carbon to nitrogen ratio requirements, and meeting the contaminant standards of Grade A Compost. The resulting soil should be conducive to the type of vegetation to be established. Implementation Options: The soil quality design guidelines listed above can be met by using one of the methods listed below. I. Leave undisturbed native vegetation and soil, and protect from compaction during construction. 2.Amend disturbed soil according to the following procedures: b. Scarify subsoil to a depth of one foot c. In planting beds, place three inches of compost and till in to an eight-inch depth. d. In turf areas, place two inches of compost and till in to an eight-inch depth. e. Apply two to four inches of arborist wood chip, coarse bark mulch, or compost mulch to planting beds after final planting. Alternatively, disturbed soil can be amended on a site-customized manner so that it meets the soil quality criteria set forth above, as determined by a licensed engineer, geologist, landscape architect, or other person as approved by City of Renton. 3. Stockpile existing topsoil during grading, and replace it prior to planting. Stockpiled topsoil must be amended if needed to meet the organic matter and depth requirements by following the procedures in method (2) above). 4. Import topsoil mix of sufficient organic content and depth to meet the organic matter and depth requirements. 5. More than one method may be used on different portions of the same site. Soil that already meets the depth and organic matter quality standards, and is not compacted, does not need to be amended. Maintenance Soil quality and depth should be established toward the end of construction and once established, should be protected from compaction, such as from large machinery use, and from erosion. Soil should be planted and mulched after installation. Plant debris or its equivalent should be left on the soil surface to replenish organic matter. Drainage Technical Information Report Revised April 4, 1019 39 | P a g e TIR SECTION 9 BONDS, SUMMARIES AND COVENANTS All the necessary documents listed below will be included in the Full TIR report after preliminary approval is received. These will include:  Bond Quantities,  Flow Control and Water Quality Facility Summary Sheet and Sketch  Declaration of Covenant for Privately Maintained Flow Control and WQ Facilities  Declaration of Covenant for Privately Maintained Flow Control BMPs TIR SECTION 10 OPERATIONS AND MAINTENANCE MANUAL Stormwater System Description The stormwater system for the site is fairly basic and contains the following elements:  12-inch storm pipe  Catch basin The stormwater runoff from the site improvements flows over to street catch basin. Water quality treatment is not a requirement for the site since it is under the 5,000 sf threshold. BOND QUANTITY WORKSHEETS Planning Division |1055 South Grady Way – 6 th Floor | Renton, WA 98057 (425) 430-7200 Date Prepared: Name: PE Registration No: Firm Name: Firm Address: Phone No. Email Address: Project Name: Project Owner: CED Plan # (LUA):Phone: CED Permit # (U):Address: Site Address: Street Intersection:Addt'l Project Owner: Parcel #(s):Phone: Address: Clearing and grading greater than or equal to 5,000 board feet of timber? Yes/No:NO Water Service Provided by: If Yes, Provide Forest Practice Permit #:Sewer Service Provided by: SITE IMPROVEMENT BOND QUANTITY WORKSHEET PROJECT INFORMATION CITY OF RENTON CITY OF RENTON 1 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; Project Closeout - Final Costs and Quantities Enclosed for Project Close-out Submittal Phone Engineer Stamp Required (all cost estimates must have original wet stamp and signature) Clearing and Grading Utility Providers N/A Project Location and Description Project Owner Information Avon Short Plat Renton, WA 98056 3343902566 Lakhbir Sing Sandhu LUR 18-000204 425-214-2280 4/9/19 Prepared by: FOR APPROVALProject Phase 1 Email Address Richard Deccio P.E. 25693 Sazei Design Group 6608 110th Ave NE Kirkland, WA 206-390-8374 1909 NE 14th Street Renton 1011 N 37th St Additional Project OwnerLincoln Ave NE & NE 14th St C19000481 AddressAbbreviated Legal Description: The east 104 ft of the north half of tract 268, C.D. Hillmans Lake Wash garden of Eden Div No. 4, according to the plat recorded in Vol 11 of Plats, pg 82, in King County, WA except the south 141 ft thereof; and except the north 20-ft for raod under recording number 6660998 City, State, Zip Page 1 of 1 Ref 8-H Bond Quantity Worksheet SECTION I PROJECT INFORMATION Unit Prices Updated: 06/14/2016 Version: 04/26/2017 Printed 4/9/2019 4/9/19 CED Permit #:C19000481 Unit Reference #Price Unit Quantity Cost Backfill & compaction-embankment ESC-1 6.50$ CY Check dams, 4" minus rock ESC-2 SWDM 5.4.6.3 80.00$ Each Catch Basin Protection ESC-3 35.50$ Each 3 106.50 Crushed 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 Fence, silt ESC-7 SWDM 5.4.3.1 1.50$ LF 330 495.00 Fence, Temporary (NGPE)ESC-8 1.50$ LF Geotextile Fabric ESC-9 2.50$ SY Hay 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 Jute 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 500 1,250.00 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 100 400.00 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 1 1,800.00 Rock Construction Entrance, 100'x15'x1'ESC-23 SWDM 5.4.4.1 3,200.00$ Each Sediment 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 Water truck, dust control ESC-31 SWDM 5.4.7 140.00$ HR Unit Reference #Price Unit Quantity Cost EROSION/SEDIMENT SUBTOTAL:4,051.50 SALES TAX @ 10%405.15 EROSION/SEDIMENT TOTAL:4,456.65 (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 4/9/2019 CED Permit #:C19000481 Existing Future Public Private Right-of-Way Improvements Improvements (D) (E) Description No. Unit Price Unit Quant.Cost Quant.Cost Quant.Cost Quant.Cost GENERAL ITEMS Backfill & Compaction- embankment GI-1 6.00$ CY Backfill & Compaction- trench GI-2 9.00$ CY 14 126.00 46 414.00 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 Excavation - Trench GI-8 5.00$ CY Fencing, cedar, 6' high GI-9 20.00$ LF Fencing, chain link, 4'GI-10 38.31$ LF Fencing, 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 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$ SY Monuments, 3' Long GI-21 250.00$ Each Sensitive Areas Sign GI-22 7.00$ Each Sodding, 1" deep, sloped ground GI-23 8.00$ SY Surveying, line & grade GI-24 850.00$ Day 1 850.00 1 850.00 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 5 600.00 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$ SF Wall, rockery GI-33 15.00$ SF SUBTOTAL THIS PAGE:1,576.00 1,264.00 (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 4/9/2019 CED Permit #:C19000481 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/SURFACING AC 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$ LF Curb & Gutter, vertical RI-8 12.50$ LF 104 1,300.00 Curb and Gutter, demolition and disposal RI-9 18.00$ LF Curb, extruded asphalt RI-10 5.50$ LF Curb, extruded concrete RI-11 7.00$ LF Sawcut, asphalt, 3" depth RI-12 1.85$ LF 220 407.00 Sawcut, concrete, per 1" depth RI-13 3.00$ LF Sealant, asphalt RI-14 2.00$ LF 220 440.00 Shoulder, gravel, 4" thick RI-15 15.00$ SY Sidewalk, 4" thick RI-16 38.00$ SY Sidewalk, 4" thick, demolition and disposal RI-17 32.00$ SY Sidewalk, 5" thick RI-18 41.00$ SY 59 2,419.00 Sidewalk, 5" thick, demolition and disposal RI-19 40.00$ SY Sign, Handicap RI-20 85.00$ Each Striping, per stall RI-21 7.00$ Each Striping, thermoplastic, ( for crosswalk )RI-22 3.00$ SF Striping, 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 112 5,040.00 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$ SY Gravel Road, 4" rock, Qty. over 2500 SY RI-33 10.00$ SY Thickened Edge RI-34 8.60$ LF SUBTOTAL THIS PAGE:9,606.00 (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 4/9/2019 CED Permit #:C19000481 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-1 350.00$ ea 2 700.00 Median Landscaping LA-2 Right-of-Way Landscaping LA-3 Wetland Landscaping LA-4 SUBTOTAL LANDSCAPING & VEGETATION:700.00 (B)(C)(D)(E) TRAFFIC & LIGHTING No. Signs TR-1 Street Light System ( # of Poles)TR-2 Traffic Signal TR-3 Traffic Signal Modification TR-4 SUBTOTAL TRAFFIC & LIGHTING: (B)(C)(D)(E) WRITE-IN-ITEMS SUBTOTAL WRITE-IN ITEMS: STREET AND SITE IMPROVEMENTS SUBTOTAL:11,882.00 1,264.00 SALES TAX @ 10%1,188.20 126.40 STREET AND SITE IMPROVEMENTS TOTAL:13,070.20 1,390.40 (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 4/9/2019 CED Permit #:C19000481 Existing Future Public Private Right-of-Way Improvements Improvements (D) (E) Description No. Unit Price Unit Quant.Cost Quant.Cost Quant.Cost Quant.Cost DRAINAGE (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$ Each Through-curb Inlet Framework D-3 400.00$ Each CB Type I D-4 1,500.00$ Each 2 3,000.00 CB Type IL D-5 1,750.00$ Each CB Type II, 48" diameter D-6 2,300.00$ Each for additional depth over 4' D-7 480.00$ FT CB Type II, 54" diameter D-8 2,500.00$ Each for additional depth over 4'D-9 495.00$ FT CB 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$ FT CB 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$ Each Trash Rack, 18"D-18 480.00$ Each Trash Rack, 21"D-19 550.00$ Each Cleanout, PVC, 4"D-20 150.00$ Each Cleanout, PVC, 6"D-21 170.00$ Each 2 340.00 Cleanout, PVC, 8"D-22 200.00$ Each Culvert, PVC, 4" D-23 10.00$ LF Culvert, PVC, 6" D-24 13.00$ LF Culvert, PVC, 8" D-25 15.00$ LF Culvert, PVC, 12" D-26 23.00$ LF Culvert, PVC, 15" D-27 35.00$ LF Culvert, PVC, 18" D-28 41.00$ LF Culvert, PVC, 24"D-29 56.00$ LF Culvert, PVC, 30" D-30 78.00$ LF Culvert, PVC, 36" D-31 130.00$ LF Culvert, CMP, 8"D-32 19.00$ LF Culvert, CMP, 12"D-33 29.00$ LF SUBTOTAL THIS PAGE:3,000.00 340.00 (B)(C)(D)(E) SITE IMPROVEMENT BOND QUANTITY WORKSHEET FOR DRAINAGE AND STORMWATER FACILITIES Quantity Remaining (Bond Reduction) (B)(C) 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 4/9/2019 CED Permit #:C19000481 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 DRAINAGE AND STORMWATER FACILITIES Quantity Remaining (Bond Reduction) (B)(C) 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$ LF Culvert, CMP, 30"D-37 78.00$ LF Culvert, CMP, 36"D-38 130.00$ LF Culvert, CMP, 48"D-39 190.00$ LF Culvert, CMP, 60"D-40 270.00$ LF Culvert, CMP, 72"D-41 350.00$ LF Culvert, Concrete, 8"D-42 42.00$ LF Culvert, Concrete, 12"D-43 48.00$ LF Culvert, Concrete, 15"D-44 78.00$ LF Culvert, Concrete, 18"D-45 48.00$ LF Culvert, Concrete, 24"D-46 78.00$ LF Culvert, Concrete, 30"D-47 125.00$ LF Culvert, Concrete, 36"D-48 150.00$ LF Culvert, Concrete, 42"D-49 175.00$ LF Culvert, Concrete, 48"D-50 205.00$ LF Culvert, CPE Triple Wall, 6" D-51 14.00$ LF Culvert, 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$ LF Culvert, CPE Triple Wall, 18" D-55 41.00$ LF Culvert, CPE Triple Wall, 24" D-56 56.00$ LF Culvert, 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$ LF Culvert, LCPE, 8"D-60 72.00$ LF Culvert, LCPE, 12"D-61 84.00$ LF Culvert, LCPE, 15"D-62 96.00$ LF Culvert, LCPE, 18"D-63 108.00$ LF Culvert, LCPE, 24"D-64 120.00$ LF Culvert, LCPE, 30"D-65 132.00$ LF Culvert, LCPE, 36"D-66 144.00$ LF Culvert, 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 4/9/2019 CED Permit #:C19000481 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 DRAINAGE AND STORMWATER FACILITIES Quantity Remaining (Bond Reduction) (B)(C) 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$ LF 65 2,730.00 Culvert, HDPE, 8"D-72 42.00$ LF 18 756.00 Culvert, HDPE, 12"D-73 74.00$ LF 33 2,442.00 Culvert, HDPE, 15"D-74 106.00$ LF Culvert, HDPE, 18"D-75 138.00$ LF Culvert, HDPE, 24"D-76 221.00$ LF Culvert, HDPE, 30"D-77 276.00$ LF Culvert, HDPE, 36"D-78 331.00$ LF Culvert, HDPE, 48"D-79 386.00$ LF Culvert, HDPE, 54"D-80 441.00$ LF Culvert, HDPE, 60"D-81 496.00$ LF Culvert, HDPE, 72"D-82 551.00$ LF Pipe, Polypropylene, 6"D-83 84.00$ LF Pipe, Polypropylene, 8"D-84 89.00$ LF Pipe, Polypropylene, 12"D-85 95.00$ LF Pipe, Polypropylene, 15"D-86 100.00$ LF Pipe, Polypropylene, 18"D-87 106.00$ LF Pipe, Polypropylene, 24"D-88 111.00$ LF Pipe, Polypropylene, 30"D-89 119.00$ LF Pipe, Polypropylene, 36"D-90 154.00$ LF Pipe, Polypropylene, 48"D-91 226.00$ LF Pipe, Polypropylene, 54"D-92 332.00$ LF Pipe, Polypropylene, 60"D-93 439.00$ LF Pipe, Polypropylene, 72"D-94 545.00$ LF Culvert, DI, 6"D-95 61.00$ LF Culvert, DI, 8"D-96 84.00$ LF Culvert, DI, 12"D-97 106.00$ LF 38 4,028.00 Culvert, DI, 15"D-98 129.00$ LF Culvert, DI, 18"D-99 152.00$ LF Culvert, DI, 24"D-100 175.00$ LF Culvert, DI, 30"D-101 198.00$ LF Culvert, DI, 36"D-102 220.00$ LF Culvert, DI, 48"D-103 243.00$ LF Culvert, 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:6,470.00 3,486.00 (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 4/9/2019 CED Permit #:C19000481 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 DRAINAGE AND STORMWATER FACILITIES Quantity Remaining (Bond Reduction) (B)(C) Specialty Drainage Items Ditching SD-1 9.50$ CY Flow Dispersal Trench (1,436 base+)SD-3 28.00$ LF French Drain (3' depth)SD-4 26.00$ LF Geotextile, laid in trench, polypropylene SD-5 3.00$ SY Mid-tank Access Riser, 48" dia, 6' deep SD-6 2,000.00$ Each Pond Overflow Spillway SD-7 16.00$ SY Restrictor/Oil Separator, 12"SD-8 1,150.00$ Each Restrictor/Oil Separator, 15"SD-9 1,350.00$ Each Restrictor/Oil Separator, 18"SD-10 1,700.00$ Each Riprap, placed SD-11 42.00$ CY Tank End Reducer (36" diameter)SD-12 1,200.00$ Each Infiltration pond testing SD-13 125.00$ HR Permeable Pavement SD-14 Permeable Concrete Sidewalk SD-15 Culvert, Box __ ft x __ ft SD-16 SUBTOTAL SPECIALTY DRAINAGE ITEMS: (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 Each 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: (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 4/9/2019 CED Permit #:C19000481 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 DRAINAGE AND STORMWATER FACILITIES Quantity Remaining (Bond Reduction) (B)(C) WRITE-IN-ITEMS (INCLUDE ON-SITE BMPs) Yard Drains WI-1 225.00$ each 2 450.00 Perforated Pipe Connection WI-2 45.00$ lf 20 900.00 WI-3 WI-4 WI-5 WI-6 WI-7 WI-8 WI-9 WI-10 WI-11 WI-12 WI-13 WI-14 WI-15 SUBTOTAL WRITE-IN ITEMS:1,350.00 DRAINAGE AND STORMWATER FACILITIES SUBTOTAL:9,470.00 5,176.00 SALES TAX @ 10%947.00 517.60 DRAINAGE AND STORMWATER FACILITIES TOTAL:10,417.00 5,693.60 (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 4/9/2019 CED Permit #:C19000481 Existing Future Public Private Right-of-Way Improvements Improvements (D) (E) Description No. Unit Price Unit Quant.Cost Quant.Cost Quant.Cost Quant.Cost Connection to Existing Watermain W-1 2,000.00$ Each Ductile Iron Watermain, CL 52, 4 Inch Diameter W-2 50.00$ LF Ductile Iron Watermain, CL 52, 6 Inch Diameter W-3 56.00$ LF Ductile Iron Watermain, CL 52, 8 Inch Diameter W-4 60.00$ LF Ductile Iron Watermain, CL 52, 10 Inch Diameter W-5 70.00$ LF Ductile Iron Watermain, CL 52, 12 Inch Diameter W-6 80.00$ LF Gate Valve, 4 inch Diameter W-7 500.00$ Each Gate Valve, 6 inch Diameter W-8 700.00$ Each Gate Valve, 8 Inch Diameter W-9 800.00$ Each Gate Valve, 10 Inch Diameter W-10 1,000.00$ Each Gate Valve, 12 Inch Diameter W-11 1,200.00$ Each Fire Hydrant Assembly W-12 4,000.00$ Each Permanent Blow-Off Assembly W-13 1,800.00$ Each Air-Vac Assembly, 2-Inch Diameter W-14 2,000.00$ Each Air-Vac Assembly, 1-Inch Diameter W-15 1,500.00$ Each Compound Meter Assembly 3-inch Diameter W-16 8,000.00$ Each Compound Meter Assembly 4-inch Diameter W-17 9,000.00$ Each Compound Meter Assembly 6-inch Diameter W-18 10,000.00$ Each Pressure Reducing Valve Station 8-inch to 10-inch W-19 20,000.00$ Each WATER SUBTOTAL: SALES TAX @ 10% WATER TOTAL: (B)(C)(D)(E) SITE IMPROVEMENT BOND QUANTITY WORKSHEET FOR WATER Quantity Remaining (Bond Reduction) (B)(C) Page 1 of 1 Ref 8-H Bond Quantity Worksheet SECTION II.d WATER Unit Prices Updated: 06/14/2016 Version: 04/26/2017 Printed 4/9/2019 CED Permit #:C19000481 Existing Future Public Private Right-of-Way Improvements Improvements (D) (E) Description No. Unit Price Unit Quant.Cost Quant.Cost Quant.Cost Quant.Cost Clean Outs SS-1 1,000.00$ Each 2 2,000.00 Grease Interceptor, 500 gallon SS-2 8,000.00$ Each Grease Interceptor, 1000 gallon SS-3 10,000.00$ Each Grease Interceptor, 1500 gallon SS-4 15,000.00$ Each Side Sewer Pipe, PVC. 4 Inch Diameter SS-5 80.00$ LF 60 4,800.00 Side Sewer Pipe, PVC. 6 Inch Diameter SS-6 95.00$ LF Sewer Pipe, PVC, 8 inch Diameter SS-7 105.00$ LF Sewer Pipe, PVC, 12 Inch Diameter SS-8 120.00$ LF Sewer Pipe, DI, 8 inch Diameter SS-9 115.00$ LF Sewer Pipe, DI, 12 Inch Diameter SS-10 130.00$ LF Manhole, 48 Inch Diameter SS-11 6,000.00$ Each Manhole, 54 Inch Diameter SS-13 6,500.00$ Each Manhole, 60 Inch Diameter SS-15 7,500.00$ Each Manhole, 72 Inch Diameter SS-17 8,500.00$ Each Manhole, 96 Inch Diameter SS-19 14,000.00$ Each Pipe, C-900, 12 Inch Diameter SS-21 180.00$ LF Outside Drop SS-24 1,500.00$ LS Inside Drop SS-25 1,000.00$ LS Sewer Pipe, PVC, ____ Inch Diameter SS-26 Lift Station (Entire System)SS-27 LS SANITARY SEWER SUBTOTAL:6,800.00 SALES TAX @ 10%680.00 SANITARY SEWER TOTAL:7,480.00 (B)(C)(D)(E) SITE IMPROVEMENT BOND QUANTITY WORKSHEET FOR SANITARY SEWER Quantity Remaining (Bond Reduction) (B)(C) Page 1 of 1 Ref 8-H Bond Quantity Worksheet SECTION II.e SANITARY SEWER Unit Prices Updated: 06/14/2016 Version: 04/26/2017 Printed 4/9/2019 Planning Division |1055 South Grady Way – 6 th 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)13,070.20$ Future Public Improvements Subtotal (c)-$ Stormwater & Drainage Facilities (Public & Private) Subtotal (d)(d)16,110.60$ (e) (f) Site Restoration Civil Construction Permit Maintenance Bond 5,836.16$ Bond Reduction 2 Construction Permit Bond Amount 3 Minimum Bond Amount is $10,000.00 1 Estimate Only - May involve multiple and variable components, which will be established on an individual basis by Development Engineering. 2 The City of Renton allows one request only for bond reduction prior to the maintenance period. Reduction of not more than 70% of the original bond amount, provided that the remaining 30% will cover all remaining items to be constructed. 3 Required Bond Amounts are subject to review and modification by Development Engineering. * Note: The word BOND as used in this document means any financial guarantee acceptable to the City of Renton. ** Note: All prices include labor, equipment, materials, overhead and profit. 206-390-8374 Email Address Avon Short Plat LUR 18-000204 1909 NE 14th Street Renton 3343902566 FOR APPROVAL C19000481 6608 110th Ave NE Kirkland, WA 40,172.55$ P (a) x 100% SITE IMPROVEMENT BOND QUANTITY WORKSHEET BOND CALCULATIONS 4/9/19 Richard Deccio P.E. 25693 Sazei Design Group 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) EST1 ((b) + (c) + (d)) x 20% -$ MAINTENANCE BOND */** (after final acceptance of construction) 4,456.65$ 13,070.20$ 35,715.90$ 4,456.65$ -$ 16,110.60$ -$ 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 4/9/2019