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fe.J. ®M, 2707 Wetmore Avenue <br /> , Everett, WA 98201 <br /> EMNEERM, INC. t 425.903.4852 <br /> f 425.259.1958 <br /> November 16, 2021 <br /> City of Everett <br /> Abiy Tsegaye <br /> Associate Engineer, Permit Services <br /> 2930 Wetmore Ave <br /> Everett, WA 98201 <br /> RE: Review Completion Letter for B2101-029 2217 GRAND AVE <br /> Dear Abiy, <br /> This letter is intended to summarize the changes made to the engineering package submitted for the <br /> initial permit review for this project. This letter addresses comments from the Review Letter dated <br /> November 15, 2021. This letter is formatted to match the comment letter for easier understanding. <br /> 1. Attach detailed WWHM model report, showing model inputs and outputs, to the drainage report, <br /> demonstrating that the splash blocks provide adequate flow control. Represent the splash <br /> blocks in the runoff model in accordance with BM T5.10B of the 2019 Stormwater <br /> Management Manual of Western Washington. Alternatively, a City of Everett Public Works <br /> "Small Project Stormwater Site Plan/Report for Projects in the Combined Sewer Area"form Site <br /> development I Everett, WA-Official Website (everettwa.gov) a Checklists& Handouts) may be <br /> completed and used for flow control sizing. Note that in the "Small Project Stormwater Site <br /> Plan/Report for Projects in the Combined Sewer Area"form, a maximum of 350 SF of roof area <br /> can be discharged to each splash block. <br /> Refer to revised Plans &Drainage Report.The stormwater plan has been redesigned to <br /> disperse the runoff from the proposed garage using two splash blocks on the western <br /> side.A downspout extension on the northern splash block will be used to prevent <br /> dispersing over the walkway at the foot of the stairs. <br /> 2. Ensure that downspouts discharge away from any foundation drains and that the flow paths of <br /> the downspout/splash blocks do not overlap, per the design criteria listed for splash blocks per <br /> BMP T5.10B of the 2019 Stormwater Management Manual of Western Washington. <br /> Noted. Please see revised Plans & Drainage Report. <br /> Thank you for taking the time to review the revised plans for this project. Please feel free to contact <br /> me with any questions you may have. <br /> Sincerely, <br /> 4seph Smeby, P.E. <br /> Omega Engineering Inc. <br />