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HomeMy WebLinkAboutC_ERC_Determination_Internal Routing_ThunderHillsSewer_181221.pdf DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT SIGNATURES: Gregg Zimmerman, Administrator Date Rick M. Marshall, Administrator Date Public Works Department Renton Regional Fire Authority Kelly Beymer, Administrator Date C.E. Vincent, Administrator Date Community Services Department Department Of Community & Economic Development ENVIRONMENTAL (SEPA) DETERMINATION OF NON-SIGNIFICANCE - MITIGATED (DNS-M) PROJECT NUMBER: LUA18-000678, ECF APPLICANT: Dave Christensen, City of Renton - Wastewater Utility / Dchristensen@Rentonwa.gov / 1055 S Grady Way, Renton, WA 98057 PROJECT NAME: Thunder Hills Sewer Interceptor Rehabilitation PROJECT DESCRIPTION: The applicant is requesting Environmental (SEPA) Review for improvements to approximately 2,050 lineal feet of sewer main. The sewer line would be improved through a mix of parallel HDPE pipelines and rehabilitation of the existing line using a cured-in-place lining technology. In addition, improvements are proposed to the 37,574 square foot maintenance access road and slope stability measures are proposed to alleviate erosion in the future. The project site includes Thunder Hills Creek, a type Np stream with a 75-foot buffer, and seven tributary streams, all classified as Type Ns streams with 50-foot buffers. There are six wetlands (Wetlands A-F). Of the six wetlands, four (Wetlands B, D, E, and F) would have a standard buffer of 100 feet, Wetland A would have a standard buffer of 75 feet, and Wetland C would have a standard buffer of 50 feet. The proposal would include 20,703 square feet of temporary wetland and stream buffer impacts, 1,332 square feet of wetland impacts (Wetland E and F), and 41,000 permanent buffer impacts including the removal of 36 trees. The project site includes RM-F and R-8 zoning designations. Access to the site would be provided via a gated entrance off of Grant Ave S and S 18th St as well as an existing entrance at the cleared PSE easement access along S 18th St. PROJECT LOCATION: Gated entrance at Grant Ave S and S 18th St and runs the length of Thunder Hills Creek North just up to before it goes under I-405 LEAD AGENCY: City of Renton Environmental Review Committee Department of Community & Economic Development The City of Renton Environmental Review Committee has determined that it does not have a probable significant adverse impact on the environment. An Environmental Impact Statement (EIS) is not required under RCW 43.21C.030(2)(c). Conditions were imposed as mitigation measures by the Environmental Review Committee under their authority of Section 4-9-070D Renton Municipal Code. These conditions are necessary to mitigate environmental impacts identified during the environmental review process. Because other agencies of jurisdiction may be involved, the lead agency will not act on this proposal for fourteen (14) days. Appeals of the environmental determination must be filed in writing on or before 5:00 p.m. on January 4, 2019. Appeals must be filed in writing together with the required fee with: Hearing Examiner, City of Renton, 1055 South Grady Way, Renton, WA 98057. Appeals to the Examiner are governed by RMC 4-8-110 and more information may be obtained from the Renton City Clerk’s Office, (425) 430-6510. PUBLICATION DATE: December 21, 2018 DATE OF DECISION: December 17, 2018 DocuSign Envelope ID: B8D5474C-3764-4AAB-9F39-921E42EA7ABF 12/17/2018 | 2:58 PM PST12/17/2018 | 3:21 PM PST 12/17/2018 | 2:54 PM PST DEPARTMENT OF COMMUNITY & ECONOMIC DEVELOPMENT Planning Division 1055 South Grady Way, 6th Floor | Renton, WA 98057 | 425-430-7200, ext. 2 www.rentonwa.gov DETERMINATION OF NON-SIGNIFICANCE – MITIGATED (DNS-M) MITIGATION MEASURES AND ADVISORY NOTES PROJECT NUMBER: LUA18-000678, ECF APPLICANT: Dave Christensen, City of Renton - Wastewater Utility / Dchristensen@Rentonwa.gov / 1055 S Grady Way, Renton, WA 98057 PROJECT NAME: Thunder Hills Sewer Interceptor Rehabilitation PROJECT DESCRIPTION: The applicant is requesting Environmental (SEPA) Review for improvements to approximately 2,050 lineal feet of sewer main. The sewer line would be improved through a mix of parallel HDPE pipelines and rehabilitation of the existing line using a cured-in-place lining technology. In addition, improvements are proposed to the 37,574 square foot maintenance access road and slope stability measures are proposed to alleviate erosion in the future. The project site includes Thunder Hills Creek, a type Np stream with a 75-foot buffer, and seven tributary streams, all classified as Type Ns streams with 50-foot buffers. There are six wetlands (Wetlands A-F). Of the six wetlands, four (Wetlands B, D, E, and F) would have a standard buffer of 100 feet, Wetland A would have a standard buffer of 75 feet, and Wetland C would have a standard buffer of 50 feet. The proposal would include 20,703 square feet of temporary wetland and stream buffer impacts, 1,332 square feet of wetland impacts (Wetland E and F), and 41,000 permanent buffer impacts including the removal of 36 trees. The project site includes RM-F and R-8 zoning designations. Access to the site would be provided via a gated entrance off of Grant Ave S and S 18th St as well as an existing entrance at the cleared PSE easement access along S 18th St. PROJECT LOCATION: Gated entrance at Grant Ave S and S 18th St and runs the length of Thunder Hills Creek North just up to before it goes under I-405 LEAD AGENCY: The City of Renton Department of Community & Economic Development Planning Division MITIGATION MEASURES: 1. Project construction shall comply with the recommendations outlined in the Geotechnical Report, prepared by Stantec, dated February 13, 2015. ADIVISORY NOTES: 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 actions. DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT Page 1 of 2 LUA18-000678 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: Name, 425-430-6598, jding@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 vegetation 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 will be required to submit a Final Stream Mitigation Report and Maintenance and Monitoring proposal. In addition, the applicant will be required to comply with all the code requirements of RMC 4-3-050 Critical Areas. This includes, but is not limited to, providing the City with a site restoration surety device and, later, a maintenance and monitoring surety device. 6. 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. 7. Retaining walls over 4 feet in height require a building permit. Any retaining walls proposed over 6 feet in height require the approval of a Modification in accordance with RMC 4-9-250D. 8. 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: Name, 425-430-7382, afowler@rentonwa.gov) 1. See Attached Development Engineering Memo dated December 7, 2018 Fire Authority: (Contact: Corey Thomas, 425-430-7024, cthomas@rentonwa.gov) 1. None Technical Services: (Contact: Amanda Askren, 425-430-7369, aaskren@rentonwa.gov) EXHIBIT 7 ADVISORY NOTES TO APPLICANT Page 2 of 2 LUA18-000678 1. Easements documents to be reviewed upon consultant completion. Comments will be provided prior to recording of said easement documents. Community Services: (Contact: Leslie Betlach, 425-430-6619, lbetlach@rentonwa.gov) 1. None Police: (Contact: Cyndie Parks, 425-430-7521, cparks@rentonwa.gov) 1. None Building: (Contact: Craig Burnell, 425-430-7290, cburnell@rentonwa.gov) 1. None DEPARTMENT OF COMMUNITY & ECONOMIC DEVELOPMENT M E M O R A N D U M DATE: December 7, 2018 TO:Jill Ding, Planner FROM:Ann Fowler, Civil Plan Reviewer SUBJECT: Utility and Transportation Comments for Thunder Hills Sewer Interceptor Rehabilitation Thunder Hills Creek from Grant Ave S/S 18th Street to I-405 LUA18-000551 I have reviewed the application for the Thunder Hills Sewer Interceptor Rehabilitation at Thunder Hills Creek from Grant Ave S/S 18th Street to I-405 and have the following comments: EXISTING CONDITIONS The site is approximately 2.18 acres in size and is irregular in shape. The site consists of an existing sewer interceptor alignment through the Thunder Hills Creek valley along with a gravel improved access roadway located adjacent to the existing stream. CODE REQUIREMENTS SURFACE WATER 1. A geotechnical report, dated February 13, 2015, completed by Stantec, for the site has been provided. The submitted report describes the site is a Severe Erosion Hazard area. Erosion control measures will need to be in place prior to starting grading activities on the site. Geotechnical recommendations presented need to be address within the project plans. 2. Temporary erosion and sediment control plans are required and shall be in accordance with the City of Renton Surfacewater Design Manual. 3. A Construction Stormwater General Permit from Department of Ecology will be required since grading and clearing of the site exceeds one acre. 4. A Stormwater Pollution Prevention Plan (SWPPP) is required for the project site and shall be submitted with the Civil Construction Permit Application. 5. Wet Season requirements found in Appendix D of the 2017 City of Renton Surface Water Design Manual (RSWDM) shall be adhered to for construction occurring between October 1st and April 30th. 6. All work proposed outside of the applicant’s property will require a temporary construction easement prior to any permits being issued. TRANSPORTATION Thunder Hills Sewer Interceptor Rehabilitation – LUA18-000551 Page 2 of 2 1. Any work within or affecting traffic within the City right-of-way will require an approved traffic control from the City. 2. Paving and trench restoration shall comply with the City’s Trench Restoration and Overlay Requirements. 3. The right of way shall remain unobstructed when possible. No stockpiles are allowed in the right of way. All truck maneuvering and materials storage shall occur on-site. 4. City streets shall be kept clean at all times and shall be swept in a timely manner. Truck washing and / or other measures as approved by the Public Works Inspector may be required for the duration of the project. 5. Construction hours outside of right of way: 7:00 AM to 8:00 PM Monday thru Friday and 9:00 AM to 8:00 PM on Saturday. Saturday work is by permission only. No work is allowed on Sunday. 6. Construction hours inside of right of way: Follow approved traffic control plan. Saturday work is by permission only. No work is allowed on Sunday. 7. Right of way haul hours: 8:30 AM to 3:30 PM Monday thru Friday. Hauling on Saturday is by permission only. No hauling is allowed on Sunday. GENERAL COMMENTS 1. Maximum exposed retaining wall height is 6-ft in residential zones and 8-ft in commercial zones and shall be setback a minimum of 3-ft from the right-of-way as outlined in RMC 4- 4-040 – Fences, Hedges and Retaining Walls. A modification request is required to exceed the height limitations outlined in City code. 2. A civil construction permit for the utility repairs is required. Civil construction plans shall conform to the City Renton Drafting Standards. A licensed Civil Engineer shall prepare the civil plans. Please visit the City’s website for submittal requirements: https://rentonwa.gov/cms/One.aspx?portalId=7922741&pageId=9687014 3. A landscaping plan shall be included with the civil plan submittal.