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bld20160426-Huang Driveway-E2.pdf CITY OF EDMONDS PLAN REVIEW COMMENTS ENGINEERING DIVISION (425) 771-0220 City Website: www.edmondswa.gov DATE:May 31, 2016 TO:Jeff Sellentin jeff@sellentininc.com FROM:Jeanie McConnell, Engineering Program Manager jeanie.mcconnell@edmondswa.gov RE:Application #: bld20160426 Project: Huang –Driveway and curb/retaining wall Project Address: 18003 Talbot Rd During review of the above noted application, it was found that the following information, corrections, or clarifications are needed. Reviews by other divisions, such as Planning, Building, or Fire may result in additional comments. Please redline plans or submit three (3) sets of revised plans/documents with a written response to each of the items below to a permit coordinator. nd Resubmittals can be made at the Development Services Department on the 2floor of City Hall. Permit Center hours are M, T, Th & F from 8am-4:30pm and on Wednesdays from 8:30am-noon. City of Edmonds handouts, standard details and development code can be referenced on the City website. Comments 1 –May 3, 2016 Comments 2 –May 31, 2016 ok 1) May 31, 2016 –Thank you for researching this further and making attempts to locate the 2) existing detention system. In theory, if the existing detention system is still functioning properly, then the additional 319sf of impervious surface area created by this project would be allowed to flow to the existing detentionsystem and it would be determined that the project meets stormwater mitigation requirements.Without knowing the status of the existing system, however, there are a couple of issuesthat need to be addressed: The new impervious surface area will not be considered as meeting stormwater a. management requirements unless the existing stormwater detention system is confirmed to be functioning properly or a separate stormwater system is installed to mitigate the new area (or any areas that would flow to this system). Regardless of the current project, the existing stormwater detention system is not in b. permit compliance and the existing detention system will need to be made operational again. This effort could take place under the current permit process or through a storm compliance process following the subject building permit process. Please confirm the approach that will be taken to address the stormwater compliance issues related to this property. As noted above, this could be done in a phased process and your response to these plan corrections should reflect your approach. May 3, 2016 comment -According to the 1989 approved plans, the existing detention system runs along the north property line in the easement road. The surface water runoff from the driveway was shown to slope to a catch basin near the NW corner of the property: Revise plans to show the existing detention system and the surface flows that will be directed to the existing detention system. 3)ok 4)ok May 31, 2016 comment –Please revise plans to show location of stormwaterdetention 5) system installed with 1989 construction of the single family residence. May 3, 2016 comment -Show location of existing utilities on the site, including water, sewer and storm. I have included with these plan comments a sewer asbuilt as well asinformation on the stormwater management system. 6)ok Page 2of 2