6502 EVERGREEN WAY ENHANCED SERVICE FACILITIES 2020-01-21

PUBLIC WORKS not shown on these plans and creating issues during construction. j. Sheet C-10: Please label all stall dimensions to ensure that it complies with COE Standard Drawing # 340. I've measured the plans and they appear to be in compliance; however the contractor needs to know the exact dimensions proposed. Please also label all compact stalls as such. k. Sheet C-11, C-12, C-13, and C-14: The City's `Design and Construction Standards and Specifications for Development' manual (DCSS) was updated at the end of 2016. This update has some significant changes including updates to standard names and numbers. Please conduct a thorough review of all reference callouts and added details to ensure that the correct name and standard drawing number are reflected in the revised plans. The City feels that it is best to reference the current standards online rather than showing the details in the plans; however we will allow the details to be included in the plans if they are current and an additional note is added that directs the contractor to the online (current) standards. 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(425-257-8995 or EEmerson@everettwa.gov). a. It appears that the proposed design is based, at least partially, on older stormwater standards. It appears that the application of the new stormwater standards may require significant changes to the design. As such I am providing a partial review since it is likely the design will change. b. Storm Drainage Report Comments: 1. The project must be designed in accordance with the current City of Everett Stormwater Management Manual (Manual) and the City's `Design and Construction Standards and Specifications for Development' (DCSS) manual. i. Please note that the current Stormwater Manual is the Department of Ecology's 2012 Stormwater Management Manual for Western Washington, as amended in 2014 (2014 SWMMWW)with City-Specific Amendments per Chapter 4 of the DCSS. 2. Since the existing site has more than 35% impervious coverage the "Redevelopment" standard must be applied in accordance with Section 2.4.2 of the Manual and Figure 2.4.2 of Volume 1 of the Manual. The drainage report appears to not have tracked through the flow chart completely. It appears likely that the project will be required to meet Minimum Requirements (MRs) # 1 through 9 for all new and replaced hard surfaces, but the applicant should verify this based on the criteria included in the flow chart, including the value based determination for replaced hard surfaces. Include documentation of the thresholds determination in the drainage report. A highlighted flow chart is preferred. ( af )5