8525 EVERGREEN WAY BURGER KING 2021-05-10

• b. Please see all redlines on the attached plans for required corrections in addition to all comments listed below.Frequently, redlines will be stand-alone and will not have an associated item in this corrections letter. Likewise, comments below may not have associated redlines. Please indicate to the City that all redlines have been adequately addressed by providing checkmarks or notes next to the City's redlines to indicate that it has been picked up or to answer a reviewer's question. A comment response letter can also be included with your resubmittal to address the comments below(handwritten remarks under each comment on this letter are perfectly acceptable). The below listed sheets have redlines. i. Sheet C 1.0 ii. Sheet C2.0 iii. Sheet C3.0 iv. Sheet C3.1 A cost estimate has been included. The SWPPP has been provided under Section 4 Page 19 of the drainage report. 2. The comments below were generated from this project's Stormwater Reviewer. If you have any questions regarding these comments, please contact Erik Emerson with the City of Everett Surface Water Department. a. Stormwater Site Plan i. MR#5 Section notes that bioretention is infeasible due to "the soils poor infiltration." This is insufficient justification for infeasibility for this BMP, especially in light of the fact that the geotechnical repot states that it is feasible (with overflow) and that permeable pavement is proposed. Please provide specific infeasibility criteria from the list in Vol V, Section 7.4 or incorporate roof drain bioretention into the project. Roof drain bioretention has been added to the project. See revised plan set and drainage report. The maximum water surface elevations are proposed to be 10-feet from the property lines. ii. MR#8 Section states that there are wetlands downstream,but that there will be no impacts as flows are less than the existing condition. Reduced flows can also be detrimental to a wetland's function and must be assessed under MR#8. However, even though there are wetlands downstream for both subbasins it appears that the discharge is to the creek rather than the wetlands. This is reasonable justification for not conducting the wetlands calculations required by MR#8. Please revise the text accordingly. The text regarding MR #8 has been revised to state that the site is discharging into the creek and not the wetland. Please see MR#8 on page 8 of the revised drainage report. PO Box 1478 • Everett, WA 98206 • Phone: (425) 303-9363 Fax: (425)303-9362 • Email:info@insightengineering.net