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Broadway Everett Expansion Storm Drainage Report <br /> November 16, 2022 <br /> 3.0 — SITE ANALYSIS <br /> 3.1 - Phased Offsite Analysis <br /> NIA. Volume 1, Section 3.1.3 of the ECY Manual recommends that projects adding 5,000 sf of new hard <br /> surface should conduct an Off-Site Analysis. <br /> 3.2 - Downstream Analysis <br /> A downstream analysis was conducted. <br /> The wetvault in the northeast corner of the site collects all stormwater on-site and discharges to an existing <br /> catch basin. Water then flows east 290 ft via an 12" pipe to a 12" pipe located in Interstate 5. Water then <br /> continues to flow to north for 1,250 ft, then east for 900 ft through a 30" pipe and eventually discharges into <br /> Wood Creek. <br /> y Jefferies Roberto <br /> m� to Ing&Tree Service <br /> a <br /> Emerson m` Q 30"DIA <br /> Elementary School <br /> T©.r+yctozed Chickalffee CONIC PIPE <br /> auLful coffee <br /> v <br /> Q Northwest Am lance <br /> Critical Care Tr nsport <br /> The Plan Nerds <br /> (Former ook... <br /> iHaul Junk Seattle <br /> t Se i V OUTLET <br /> Ing Q A o& ru� <br /> E Jewelers Choic Boys rl o <br /> rc�ckr Snohor is Co my WOOD <br /> 0 CREEK <br /> Puget Dr © BreCyn Ion <br /> ry Montessori Schools 0 SITE <br /> of Snohomish County <br /> 18"DIA <br /> AITM(Broadway Shell)9 CONIC PIPE <br /> Sh <br /> Extended Stay A Ica <br /> Seattle rth <br /> Calvary Christian <br /> Academy&Tutoring <br /> Secu <br /> 12"DIA <br /> CONIC PIPE <br /> Figure 3— Downstream Flow Path Map <br /> Page 5 <br />