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HomeMy WebLinkAboutEx 10_Advisory NotesDEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT Page 1 of 6 LUA22-000315 ADVISORY NOTES TO APPLICANT The following notes are supplemental information provided in conjunction with the administrative land use action. Because these notes are provided as information only, they are not subject to the appeal process for the land use action. Planning: (Contact: Alex Morganroth, 425-430-7219, amorganroth@rentonwa.gov) 1. RMC section 4-4-030.C.2 limits haul hours between 8:30 am to 3:30 pm, Monday through Friday unless otherwise approved by the Development Services Division. 2. Commercial, multi-family, new single family and other nonresidential construction activities shall be restricted to the hours between seven o’clock (7:00) a.m. and eight o’clock (8:00) p.m., Monday through Friday. Work on Saturdays shall be restricted to the hours between nine o’clock (9:00) a.m . and eight o’clock (8:00) p.m. No work shall be permitted on Sundays. 3. Within thirty (30) days of completion of grading work, the applicant shall hydroseed or plant an appropriate ground cover over any portion of the site that is graded or cleared of veget ation and where no further construction work will occur within ninety (90) days. Alternative measures such as mulch, sodding, or plastic covering as specified in the current King County Surface Water Management Design Manual as adopted by the City of Renton may be proposed between the dates of November 1st and March 31st of each year. The Development Services Division’s approval of this work is required prior to final inspection and approval of the permit. 4. A National Permit Discharge Elimination System (NPDES) permit is required when more than one acre is being cleared. 5. 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. 6. The applicant shall erect and maintain six foot (6') high chain link temporary construction fencing around the drip lines of all retained trees, or along the perimeter of a stand of retained trees. 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. 7. This permit is shall comply with the Bald and Golden Eagle Protection Act. The permitted is responsible for adhering to the U.S. Fish and Wildlife Service National Bald Eagle Management Guidelines (2007) and /or your U.S. Fish and Wildlife Service permit. Development Engineering: (Contact: Yong Qi, 425-430-7439, yqi@rentonwa.gov) 1. See Attached Development Engineering Memo dated October 4, 2022 Fire Authority: (Contact: Corey Thomas, 425-276-9582, cthomas@rentonwa.gov) Exhibit 10 DocuSign Envelope ID: 121137F3-D672-460F-8802-55F5D3EB78FE ADVISORY NOTES TO APPLICANT Page 2 of 6 LUA22-000315 Environmental Impact Comments: 1. The fire impact fees are currently applicable at the rate of $829.77 per single family unit. This fee is paid at building permit issuance. Credit will be granted for any existing homes that are removed or retained. Code Related Comments: 1. The fire flow requirement for a single-family home is 1,000 gpm minimum for dwellings up to 3,600 square feet (including garage and basements). If the dwelling exceeds 3,600 square feet, a minimum of 1,500 gpm fire flow would be required. A minimum of one fire hydrant is required within 300-feet of the proposed buildings and two hydrants if the fire flow goes up to 1,500 gpm. Water is provided by King County Water District 90. A water availability certificate is required from them. 2. Fire department apparatus access roadways are adequate from existing city streets. Property and Technical Services (Contact: Stephanie Rary, 425-430-6592, srary@rentonwa.gov) Page 1 of Short Plat Plan set: Special Exceptions Nos. 2 and 3 should refer to sheet 3 of the plan set showing easements. CC&Rs: Cover page – remove the word “Lot” between “Short” and “Subdivision” so Legal Description reads: “Lots 1, 2 and 3 of City of Renton Short Subdivision No…..” for consistency in the name. Page 1: §A. add “City of Renton” before “Short Subdivision” so it reads “Declarant is the owner of Lots 1, 2 and 3 of City of Renton Short Subdivision…” for consistency in the name. Page 3: §2.1 Lots.: change all zip codes to 98059 Page 6: §5.2 Use of Lots: reference to Renton Municipal Code Chapter 23.45 is incorrect – there is no 23.45. Needs to be updated. Please let me know if you have any questions. ADVISORY NOTES TO APPLICANT Page 3 of 6 LUA22-000315 DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT M E M O R A N D U M DATE: October 4, 2022 TO: Alex Morganroth, Planning FROM: Yong Qi, Development Engineering SUBJECT: Ravi Short Plat 6304 SE 2nd Place LUA22-000315 I have completed the review for the above-referenced proposal located at parcel 1423059033. The following comments are based on the land use application submittal made to the City of Renton by the applicant. EXISTING SITE CONDITIONS The site is approximately 0.99 acres in size and is rectangular in shape. The site contains one existing single-family residence, a detached garage, and associated landscaping and lawn areas. The site is fronted by SE 2nd Place to the south. Water The site is located in the King County Water District 90 Utility District service area. Sewer The site is in the City of Renton sewer service area. There is an existing 10” PVC sewer running east to west in SE 2nd Place south of the site. Reference Project File WWP2703148 in COR Maps for record drawings. The existing residences are served by private on-site septic systems. Storm The site topography slopes moderately from the northeast to the southwest. The site contains regulated slopes between 15% and 25% grade. There is an existing 12-inch stormwater main located along the property frontage on SE 2nd Place. Reference Record Drawing R-301705. Streets The proposed development fronts SE 2nd Place along the south property line. The SE 2nd Place existing street section consists of a pavement width of approximately 38’ with a 15’ travel lane in the eastbound and westbound direction and a 4’ paved shoulder along each side of the roadway. There is no existing curb or sidewalk along either side of the roadway. The existing right of way width for SE 2nd Place is approximately 60’ per the King County Assessor’s Map. CODE REQUIREMENTS WATER COMMENTS 1. Water availability certificate should be provided to the City with the land use application. a. Water availability from King County Water District 90 was submitted with the Land Use Application. 2. Fire hydrants and fire flow requirements should meet the requirements of Renton Fire Authority (RFA). 3. Approved water plans from Water District 90 Utility District should be provide to the City during Construction permit stage. ADVISORY NOTES TO APPLICANT Page 4 of 6 LUA22-000315 SEWER COMMENTS 1. The project is within the City of Renton’s sanitary sewer service area. 2. There is an existing 10” PVC main sewer to the south of the property, on SE 2nd Place (See Record Drawing S- 314802). 3. The developer will need to show how they propose to serve the new development with sanitary sewer service to each of the units. a. Two new sewer stubs connecting to the existing 10’’ sewer main on SE 2nd Place are being proposed to serve Lots 2 &3 as shown on the Preliminary Civil plans, as part of the Land Use Application. b. New sewer stub serving Lot 1 for existing house is also required to connect to the existing 10’’ sewer main on SE 2nd Place. The existing septic system shall be abandoned in accordance with King County Department of Health regulations and Renton Municipal Code. c. Increase the line weight for the side sewers on the plans. 4. A separate side sewer will be required for each new lot. All new side sewers shall be per City of Renton Standard Plans 406.1 and 406.2. 5. The development is subject to a wastewater system development charge (SDC) fee. The 2022 SDC fee for sewer is based on the size and number of new domestic water services to serve the project. a. The current sewer fee for a 1-inch meter install is $3,500.00 per meter. b. This project will be subject to the Central Plateau Interceptor Special Assessment District fee. The fee is assessed at $538.48 per lot, $538.48 x 3 lots = $1,615.44 Total SURFACE WATER COMMENTS 1. A drainage report complying with the current version of the City adopted Surface Water Design Manual (SWDM) will be required. Based on the City’s flow control map, the site falls within the Flow Control Duration Standard area matching Forested Site Conditions and is within the Lower Cedar River Drainage Basin. Refer to Figure 1.1.2.A – Flow chart to determine the type of drainage review required in the RSWM. All stormwater improvements as per the drainage review along with stormwater improvements in the frontage are required to be provided by the developer. a. Effective June 22, 2022, the City of Renton has adopted the 2022 RSWDM, which is based on the 2021 King County Surface Water Design Manual. All projects vested on or after June 22, 2022 will be subject to these new stormwater requirements. Please refer to RMC 4-1-045 for information regarding project vesting. b. A preliminary technical information report (TIR) by Daley-Morrow-Poblete, Inc., dated July 11, 2022, was submitted by the Applicant with the Land Use Application. c. Core Requirement #2, off-site analysis: A Level 1 downstream analysis was performed and shown at Section III in the TIR. The downstream drainage path was field inspected for existing drainage problems and the analysis concluded there were no existing drainage problems within 1320 ft of site discharge to the City conveyance system at 148th Place SE. The final engineering plans and Level 1 downstream analysis will be reviewed as a portion of the Civil Construction Permit Application. d. Core Requirement #3, flow control facilities: An underground R-Tank detention facility is proposed to meet the flow control requirements. The vault was sized using WWHM 2012. Vault sizing calculations used forested conditions for the existing conditions input into WWHM for the lot area. No credits were taken in the modeling for the on-site BMPs. Runoff from the improvements along SE 2nd Place will bypass the proposed detention facility and trade basin with the existing impervious area from Lot 1. 2. If the new plus replaced pollution generating impervious surface exceeds 5,000 SF, the applicant will be required to provide basic water quality treatment. Any proposed detention and/or water quality vault shall be designed in accordance with the RSWDM that is current at the time of civil construction permit application. Separate structural plans will be required to be submitted for review and approval under a separate building permit for the detention and/or water quality vault. ADVISORY NOTES TO APPLICANT Page 5 of 6 LUA22-000315 a. Per the TIR, this project is exempt from Core Requirement #8, Water Quality Facilities as the project is proposing less than 5,000 square feet of new plus replaced pollution generating impervious surface. 3. Appropriate on-site BMPs satisfying Core Requirement #9 will be required to help mitigate the new runoff created by this development to the maximum extent feasible. On-site BMPs shall be evaluated as described in Section C.1.3 of the 2022 RSWDM. A preliminary drainage plan, including the application of on-site BMPs, shall be included with the land use application, as applicable to the project. The final drainage plan and drainage report must be submitted with the utility construction permit application. a. The project is proposing to use basic dispersion and permeable pavement to satisfy Core Requirement #9, On-Site BMPs. The combination of basic dispersion and permeable pavement provide at mitigation to at least 20% of the lot area. The TIR notes that full dispersion and full infiltration are infeasible BMPs due to site constraints and soil types. Limited infiltration is also infeasible due to the depth and separation requirements. Bioretention and rain gardens are infeasible as the site due to the depth and separation requirements. b. Final evaluation of the application of on-site BMPs to the maximum extent feasible will be completed during civil construction permit review. The applicant may be required to apply additional on-site BMPs to meet the minimum requirements outlined in Core Requirement #9. 4. A geotechnical soils report for the site is required per the 2022 Renton Surface Water Design Manual Section C.1.3. Information on the water table and soil permeability (measured infiltration rates), with recommendations of appropriate on-site BMPs per Core Requirement #9 and Appendix C shall be included in the report. The report should also include information concerning the soils, geology, drainage patterns and vegetation present shall be presented in order to evaluate the drainage, erosion control and slope stability for site development of the proposed plat. The applicant must demonstrate the development will not result in soil erosion and sedimentation, landslide, slippage, or excess surface water runoff. a. A geotechnical report by Earth Solutions NW, dated November 2, 2021, was submitted by the Applicant with the Land Use Application. The report notes that construction of the proposed residential short plat is feasible from a geotechnical standpoint. b. Two small-scale pilot infiltration tests were performed within the property to evaluate infiltration potential of the site in September 2021. The results indicate that permeable pavement is feasible for the proposed project and infiltration facilities are considered infeasible from a geotechnical standpoint given the very low measured field rate, appreciable fine contents, and dense to very dense in -situ condition. 5. The 2022 Surface water system development fee is $2,100 per new single-family lot. A credit for one lot will be issued for the existing home. This is payable prior to issuance of the construction permit. This fee is subject to change based on the calendar year the construction permit is issued. TRANSPORTATION COMMENTS 1. The proposed development fronts SE 2nd Place along the south property line(s). SE 2nd Place is classified as a residential access street. Per RMC 4-6-060, the minimum right of way width for a residential access street is 53 feet. Per City code 4-6-060, half street improvements shall include a pavement width of 26 feet (13 feet from centerline), a 0.5-foot curb, an 8-foot planting strip, a 5-foot sidewalk, street trees and storm drainage improvements. a. These improvements are shown on the preliminary civil construction plans. 2. Refer to City code 4-4-080 regarding driveway regulations: b. Maximum driveway slope is 15%. Driveways which exceed 8% shall provide slotted drains at the lower end with positive drainage discharge to restrict runoff from entering the garage. c. The maximum width of a single loaded garage driveway is 9-feet and the maximum width of a double loaded garage driveway is 16-feet. If a garage is not present, the maximum driveway width is 16-feet. d. Driveways shall not be closer than 5-feet to any property line. 3. Paving and trench restoration shall comply with the City’s Trench Restoration and Overlay Requirements. a. Based on the proposed utility and roadway design submitted as part of the land use, full overlay of S E 2nd Place along the property frontage may be required. ADVISORY NOTES TO APPLICANT Page 6 of 6 LUA22-000315 4. The transportation impact fee is based on the type of land use. For single-family residential, the 2022 transportation impact fee is $10,861.69 per lot. Transportation impact fees are subject to change based on the year the building permit is applied for. GENERAL COMMENTS 1. All existing and proposed utility lines (i.e., electrical, phone, and cable services) along property frontage or within the site must be underground. The construction of these franchise utilities must be inspected and approved by a City of Renton inspector. 2. Adequate separation between utilities as well as other features shall be provided in accordance with code requirements: a. 7-ft minimum horizontal and 1-ft vertical separation between storm and other utilities is required with the exception of water lines which require 10-ft horizontal and 1.5-ft vertical. b. The stormwater line should be minimum 5 feet away from any other structure or wall or building. c. Trench of any utility should not be in the zone of influence of the retaining wall or of the building. 3. All civil construction permits for utility and street improvements will require separate plan submittals. All utility plans shall confirm to the Renton Drafting Standards. A licensed Civil Engineer shall prepare the civil plans. Please visit the Development Engineering Forms page for the most up-to-date plan submittal requirements: http://rentonwa.gov/business/default.aspx?id=42473 4. A landscaping plan and tree retention shall be included with the civil plan submittal. Each plan shall be on separate sheets. 5. Additional Building Permit Applications will be required for the following: a. Any retaining walls that exceed 4 feet in height, as defined by RMC 4-4-040. b. Detention vaults for storm water flow control. c. Demo of any existing structures on the project site(s). 6. Fees quoted in this document reflect the fees applicable in the year 2022 only and will be assessed based on the fee that is current at the time of the permit application or issuance, as applicable to the permit type. Please visit www.rentonwa.gov for the current development fee schedule.