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HomeMy WebLinkAboutC_Response_Letter_Barghausen_230809_v2.pdf August 9, 2023 ELECTRONIC DELIVERY Alex Morganroth City of Renton Community & Economic Development 1055 South Grady Way Renton, WA 98057 RE: On-Hold Notice for Preliminary Plat Review Harmony Ridge (fka United Christian Church of Renton) City of Renton File No. PR23-000076 / LUA23-000143, ECF, PP, LLA, MOD Our Job No. 22298 Dear Alex: We are providing additional documents for the above-referenced project in accordance with the On-Hold Notice received June 7, 2023. Enclosed are the following for your review: 1. Revised Preliminary Plat Set dated August 8, 2023, including offsite utility plans and revised landscaping plans. 2. Revised Geotechnical Engineering Study, dated July 3, 2023, prepared by Earth Solutions NW. 3. Harmony Ridge Off-site Utility Extension Preliminary Tree Protection Plan, dated August 7, 2023, prepared by Washington Forestry Consultants, Inc. 4. Tree Retention and Credit Worksheet – Offsite. 5. Request for Temporary Construction Easement Letter prepared by Ichijo Technological Homes dated August 8, 2023. The following outline provides each of the comments in italics exactly as written, along with a narrative response describing how each comment was addressed: 1. The Preliminary Utility Plan, prepared by Barghausen Consulting Engineers, Inc., dated April 5, 2023, was submitted with the land use application. The Plan shows a proposed 38’ wide utility easement along the southwest property line of City’s property (Parcel# 2023059109) for both storm main and sewer main extension serving the proposed project. In order to facilitate City of Renton Public Works and Water Utility Department to determine if this proposal is acceptable, additional information are required: i) a detailed survey of the proposed easement area, i.e., topography, vegetation/trees present, soils; ii) a grading plan showing clearing/grading limit and the two maintenance accesses; iii) a tree removal/retention plan within the easement area; iv) a construction plan and profile of the sewer main extension and stormwater main along the easement and Puget Dr SE with a utility crossing table, e.g., Olympic Pipeline and 16’’ City Water Main within the Puget Dr SE. Alex Morganroth City of Renton Community and Economic Development - 2 - August 9, 2023 i. Response: The offsite utility extension area has been field surveyed by Barghausen Consulting Engineers. Existing trees have been located. Earth Solutions NW has also evaluated the proposed extension and revised their original geotechnical report and concluded that the offsite utility extension area is similar to onsite conditions. ii. Response: The preliminary plat set has been revised to include detailed grading of the two maintenance access roads. iii. Response: A tree removal plan for the offsite extension has been prepared and included with the revised preliminary plat set. In addition, Washington Forestry Consultants, Inc. has evaluated the significant trees within the offsite utility extension in order to make recommendations for replanting of significant trees. The landscape plans within the preliminary plat set have been revised to show mitigation plantings associated with the tree removal. iv. Response: Plan and profiles of the offsite utility extension have been provided in the revised preliminary plat set. The entire alignment of the offsite utility extension has been surveyed by Barghausen Consulting Engineers. Existing utilities, including the Olympic Pipeline and City water were located using a utility locate service. We have been in contact with BP Pipelines N.A, Inc, who manages the Olympic Pipeline. During final engineering, we will process a Foreign Line Crossing Agreement, which will require potholing of the existing pipeline at each of the proposed crossings. We believe the enclosed documents address comment from the On-Hold Notice received June 7, 2023. Please review the enclosed at your earliest convenience. If you have questions or need additional information, please do not hesitate to contact me at this office. Thank you. Sincerely, Barry Talkington P.E. Principal Engineer BT/mf/kb 22298c.005.docx enc: As Noted cc: Kanon Kupferer, Ichijo USA Co., Ltd. Barry Talkington, Barghausen Consulting Engineers, Inc. Ivana Halvorsen, Barghausen Consulting Engineers, Inc.