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HomeMy WebLinkAboutSR_ERC_Cypress_Lane_v2DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT Project Location Map SR_ERC_Cypress Lane_v2 (002) ENVIRONMENTAL REVIEW COMMITTEE REPORT ERC Meeting Date: September 13, 2021 Project File Number: PR21-000304 Project Name: Cypress Lane Preliminary Plat Land Use File Number: LUA21-000287, PP, ECF, MOD Project Manager: Jill Ding, Senior Planner Owners: 1. Dean and Caroly Mullenberg, 5816 NE 4th Pl, Renton, WA 98059 2. Sharon Scott, 510 Nile Ave NE, Renton, WA 98059 Applicant: Robert P Wenzl, Tuscany Construction, LLC, PO Box 2170 Renton, WA 98059 Contact: Cliff Williams, PE, Dev. Man. Eng, LLC, 4648 Shantel St, Mount Vernon, WA 98274 Project Location: 5116 NE 4th Pl and 510 Nile Ave NE, Renton, WA 98059 Project Summary: The applicant is requesting Preliminary Plat approval, Environmental (SEPA) Review, and a Street Modification for the subdivision of an existing 4.89 acre site, zoned R-4 into 15 lots and three (3) tracts for the future construction of single family residences. Two existing single family residences and associated detached accessory structures are proposed for removal. The proposed lots would range in size from 8,511 sq. ft. to 12,445 sq. ft. Access to the proposed lots would be provided via a new public street extension from Orcas Ave NE to the north to NE 4th Pl to the south. Access to Lots 11 and 12 would be provided off of Nile Ave NE via a shared driveway easement. In addition, a new public alley extension is proposed to connect the south end of Pasco Ave NE to the new extension of Orcas Ave NE. A Modification to the adopted street standards is requested to reduce the required right-of-way width and pavement width along the project's Nile Ave NE frontage. Of the existing 304 significant trees, the applicant is proposing to retain 60 trees. There are no critical areas mapped on the project site. Exist. Bldg. Area SF: N/A Proposed New Bldg. Area (footprint): Proposed New Bldg. Area (gross): N/A N/A Site Area: 212,746 sq. ft. (4.88 acres) Total Building Area GSF: N/A STAFF RECOMMENDATION: Staff Recommends that the Environmental Review Committee issue a Determination of Non-Significance (DNS). DocuSign Envelope ID: CA0F9445-1A24-40E1-824B-9EB5CF286C6E City of Renton Department of Community & Economic Development Cypress Lane Preliminary Plat Staff Report to the Environmental Review Committee LUA21-000287, PP, ECF, MOD Report of September 13, 2021 Page 2 of 5 SR_ERC_Cypress Lane_v2 (002) ENVIRONMENTAL REVIEW In compliance with RCW 43.21C.240, the following environmental (SEPA) review addresses only those project impacts that are not adequately addressed under existing development standards and environmental regulations. A. Environmental Threshold Recommendation Based on analysis of probable impacts from the proposal, staff recommends that the Responsible Officials: Issue a DNS with a 14-day appeal period B. Mitigation Measures 1. None recommended C. Exhibits Exhibit 1: Environmental Review Committee (ERC) Report Exhibit 2: Preliminary Plat Plan Set Exhibit 3: Geotechnical Reports, prepared by prepared by Cobalt Geosciences, dated February 2, 2021 and April 12, 2021. Exhibit 4: Preliminary Technical Information Report, prepared by Core Design, dated June 28, 2021 Exhibit 5: Arborist Report prepared by Greenforest Incorporated, dated June 21, 2021 Exhibit 6: Advisory Notes D. Environmental Impacts The Proposal was circulated and reviewed by various City Departments and Divisions to determine whether the applicant has adequately identified and addressed environmental impacts anticipated to occur in conjunction with the proposed development. Staff reviewers have identified that the proposal is likely to have the following probable impacts: 1. Earth Impacts: The applicant submitted two Geotechnical Reports (Exhibit 3) with the project application, one for 5816 NE 4th Pl and one for 510 Nile Ave NE, both reports were prepared by Cobalt Geosciences. The report for 5816 NE 4th Pl was dated February 2, 2021 and the report prepared for 510 Nile Ave NE was dated April 12, 2021. The topography of the project site generally slopes from the northeastern corner to the southwest corner with and average slope of approximately 7.5%. Grading is proposed to ensure proper roadway configuration, site drainage, stormwater management, and building envelopes. Approximately 17,050 cubic yards (CY) of cut and 5,634 CY of fill is anticipated, with a net cut of 11,415 CY. According to the submitted geotechnical reports, two test pits were excavated on 5816 NE 4th Pl. The test pits encountered approximately 6 inches of topsoil and vegetation underlain by approximately 2.25 to 2.75 feet of loose to medium dense, silty-fine to medium grained sand with gravel (Weathered Glacial Till). These materials were underlain by dense to very dense, silty-fine to medium grained sand with gravel (Glacial Till). Groundwater was not encountered in the test pits, however it was concluded that groundwater could be present seasonally on the project site perched on the underlying glacial till. Four hand borings were dug on 510 Nile Ave NE to determine the shallow soil and groundwater conditions, where accessible. Test pits were not feasible on this site as the vegetation was very heavy and did not allow suitable access for an excavator. The hand borings encountered approximately 6 inches of topsoil and vegetation underlain by approximately 2 to 3 feet of loose to medium dense, silty- fine to medium grained sand with gravel (Weathered Glacial Till). These materials were underlain by DocuSign Envelope ID: CA0F9445-1A24-40E1-824B-9EB5CF286C6E City of Renton Department of Community & Economic Development Cypress Lane Preliminary Plat Staff Report to the Environmental Review Committee LUA21-000287, PP, ECF, MOD Report of September 13, 2021 Page 3 of 5 SR_ERC_Cypress Lane_v2 (002) dense to very dense, silty-fine to medium grained sand with gravel (Glacial Till). Groundwater was not encountered in the hand borings. Groundwater could be present seasonally perched on the underlying glacial till. The soil and groundwater conditions on both sites were consistent. The reports concluded that residences supported on shallow foundation systems bearing on medium dense or firmer native soils or on structural fill placed on the native soils may be constructed on the project site. Local overexcavation of loose fill and weathered native soils may be necessary depending on the proposed elevations and locations of the new residences. Stormwater infiltration is not feasible due to the presence of dense fine-grained soil deposits on the project site. Recommendations were included in the reports regarding site preparation, temporary and permanent erosion control, foundation design, retaining walls, slabs-on-grade, and stormwater management. It is anticipated that the City’s adopted erosion control measures would adequately mitigate any potential adverse impacts that could occur during project construction, therefore no further SEPA mitigation measures are recommended. Mitigation Measures: None recommended Nexus: N/A 2. Air Impacts: Temporary impacts to the air including construction-related vehicle exhaust and dust particles dispersed from sawing, cutting, and manipulating materials could occur onsite during project construction. These potential construction impacts are not anticipated to be significant and would be mitigated through the implementation of the following best management practices (BMPs): aggregate construction entrances, truck wash stations, and spray-truck watering for exposed soils. Therefore, no further mitigation is recommended. Mitigation Measures: None recommended Nexus: N/A 3. Water a. Storm Water Impacts: The applicant submitted a Preliminary Technical Information Report, prepared by Core Design, dated June 28, 2021 (Exhibit 4) and preliminary drainage plans (Exhibit 2) with the project application materials. Based on the City of Renton’s flow control map, the site falls within the Flow Control Duration Standard- Matching Forested and is within the Lower Cedar River Drainage Basin. Project construction is required to comply with the 2017 Renton Surface Water Design Manual (RSWDM). The project has two natural discharge locations. Both are to the City’s conveyance system. The north discharge location is along Nile Avenue NE and the south discharge location is on NE 4th Place. The existing surface water runoff, which discharges from the north discharge location at the catch basin located along the east side of Nile Avenue NE right at the southwest corner of the project site, flows south to the intersection with NE 4th Street. At this point the runoff is redirected west along the north side of NE 4th Street. At a point in between Lyons Avenue NE and Jericho Avenue NE, the conveyance system crosses to the south side of NE 4th Street. The surface water runoff would continue to follow this path until it is discharged into a stream tributary to Lake Washington. The surface water runoff, which discharges from south discharge location at the two catch basins located along the south side of NE 4th Place, one at the west side and the other at the east side of the site flows south along Orcas Place NE until it meets NE 4th Street. The storm system directs runoff to the west along NE 4th Street for approximately 800 ft at which point the system flows south through a residential neighborhood. The storm system emerges again on NE 3rd Street and DocuSign Envelope ID: CA0F9445-1A24-40E1-824B-9EB5CF286C6E City of Renton Department of Community & Economic Development Cypress Lane Preliminary Plat Staff Report to the Environmental Review Committee LUA21-000287, PP, ECF, MOD Report of September 13, 2021 Page 4 of 5 SR_ERC_Cypress Lane_v2 (002) continues to flow south along Kitsap Ave NE. The surface water runoff would continue to follow this path until it is discharged into a stream tributary to Lake Washington. The project is required to provide a flow control and water quality facility as the proposed development would include more than 5,000 sq. ft. of new plus replaced pollution generating impervious surface. Two stormwater detention wet vaults are proposed to mitigate flow control and water quality impacts, one wet vault would be located within Tract A located on the southern portion of the project site and the other wet vault would be located within Tract B located on the western portion of the project site. It is anticipated that any surface water impacts generated from the proposed development would be mitigated by the City’s adopted stormwater regulations, therefore no further mitigation is recommended. Mitigation Measures: None recommended Nexus: N/A 4. Vegetation Impacts: The applicant submitted an Arborist Report prepared by Greenforest Incorporated, dated June 21, 2021 (Exhibit 5) with the project application materials. According to the submitted Arborist Report, the project site is currently vegetated with 329 trees, of those 18 are landmark trees. Of the 329 onsite trees, 25 trees were classified as dangerous trees, 60 trees are located within proposed rights-of-way and 9 trees are located within an access tract or easement (public alley). After the deduction of the dangerous trees, trees within a public right-of-way and trees within an access easement/tract (public alley) the project site would have 235 trees that are viable for retention. As part of the proposed preliminary plat, the applicant is proposing to retain 60 trees or 26 percent of the onsite significant trees. The proposal will be required to comply with the City’s adopted Tree Retention and Land Clearing Regulations and Landscaping Regulations which would include the retention and/or replacement of at least 30 percent of onsite significant trees, the verification that each new lot would provide the required minimum tree density of 2 trees per 5,000 sq. ft., 10 feet of onsite landscaping along all public street frontages, landscaping of the proposed stormwater tracts (Tracts A and B), and the planting of street trees within all public rights-of-way. It is anticipated that compliance with the City’s adopted Tree Retention and Land Clearing Regulations and Landscaping Regulations would adequately mitigate for the removal of existing trees on the project site, therefore no further mitigation is recommended at this time. Mitigation Measures: None recommended Nexus: N/A 5. Transportation Impacts: The proposed project fronts NE 4th Pl along the south property line. NE 4th Pl is classified as a Residential Access street, with an existing right-of-way (ROW) width, according to the King County Assessor Map, of 28.5 feet. The proposed development fronts Nile Ave Ne along the west property line. Nile Ave NE is classified as a collector arterial street with an existing ROW width, according to the King County Assessors Map, of 60 feet. The proposed development fronts Pasco Ave NE along a portion of the north property line. Pasco Ave NE is classified as a Residential Access street, with an existing ROW width, according to the King County Assessor Map, of 30 feet, as part of the proposed subdivision, Pasco Ave NE would extend onto the project site as a 20-foot wide public alley. The proposed development would be required to construct frontage improvements including paving, curb and gutter, planter trip with street trees, and a sidewalk along Nile Ave NE and NE 4th St. The applicant would construct a full width residential access street through the development extending Orcas Ave NE to NE 4th St. A Traffic Impact Analysis is required when a project proposal would result in the generation of 20 new am or pm DocuSign Envelope ID: CA0F9445-1A24-40E1-824B-9EB5CF286C6E City of Renton Department of Community & Economic Development Cypress Lane Preliminary Plat Staff Report to the Environmental Review Committee LUA21-000287, PP, ECF, MOD Report of September 13, 2021 Page 5 of 5 SR_ERC_Cypress Lane_v2 (002) peak hour trips. As the proposed subdivision would result in the creation of 15 new lots, it is anticipated that the proposal would not generate 20 new am or pm peak hour trips. Therefore, the project was exempt from providing a Traffic Study with the preliminary plat application materials. It is anticipated that compliance with the City’s adopted Street Standards and the payment of required Traffic Impact Fees would mitigate any adverse impacts that could be generated by additional traffic attributed to the proposed subdivision; therefore no further mitigation is recommended. Mitigation Measures: None recommended Nexus: N/A E. Comments of Reviewing Departments The proposal has been circulated to City Department and Division Reviewers. Where applicable, their comments have been incorporated into the text of this report and/or “Advisory Notes to Applicant.” ✓ Copies of all Review Comments are contained in the Official File and may be attached to this report. The Environmental Determination decision will become final if the decision is not appealed within the 14-day appeal period (RCW 43.21.C.075(3); WAC 197-11-680). ✓ Environmental Determination Appeal Process: Appeals of the environmental determination must be filed in writing on or before 5:00 p.m. on September 27, 2021. Due to the ongoing state of emergency enacted by Governor’s Proclamation 20-05, the City Clerk’s Office is working remotely. For that reason, appeals must be submitted electronically to the City Clerk at cityclerk@rentonwa.gov or delivered to City Hall 1st floor Lobby Hub only on Tuesdays and/or Wednesdays. The appeal fee, normally due at the time an appeal is submitted, will be collected at a future date if your appeal is submitted electronically. Appeals to the Hearing Examiner are governed by RMC 4-8-110 and additional information regarding the appeal process may be obtained from the City Clerk’s Office, cityclerk@rentonwa.gov. DocuSign Envelope ID: CA0F9445-1A24-40E1-824B-9EB5CF286C6E CITY OF RENTON DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT STAFF REPORT TO THE ENVIRONMENTAL REVIEW COMMITTEE EXHIBITS Project Name: Cypress Lane Preliminary Plat Land Use File Number: LUA21-000287, PP, ECF, MOD Date of Meeting September 13, 2021 Staff Contact Jill Ding Senior Planner Project Contact/Applicant Cliff Williams, PE Dev. Man. Eng, LLC 4648 Shantel St, Mount Vernon, WA 98274 Project Location 5116 NE 4th Pl and 510 Nile Ave NE, Renton, WA 98059 The following exhibits are included with the ERC Report: Exhibit 1: Environmental Review Committee (ERC) Report Exhibit 2: Preliminary Plat Plan Set Exhibit 3: Geotechnical Reports, prepared by prepared by Cobalt Geosciences, dated February 2, 2021 and April 12, 2021. Exhibit 4: Preliminary Technical Information Report, prepared by Core Design, dated June 28, 2021 Exhibit 5: Arborist Report prepared by Greenforest Incorporated, dated June 21, 2021 Exhibit 6: Advisory Notes DocuSign Envelope ID: CA0F9445-1A24-40E1-824B-9EB5CF286C6E