10521 19TH AVE SE 2022-05-23 - Laserfiche WebLink

control facility for the design storms of interest for flow control and water quality treatment sizing. o Document whether the pipe sizes, slopes, and velocities are in accordance with 4-2.3(2) Pipe Sizes, Slopes, and Velocities of the DCSS. o Storm drainage structures shall meet the requirements of the DCSS 4-2.3(3) Structures. b. Design Drawings: • Sheet 2/7 o Update Soil Amendment Notes as needed for consistency with BMP T5.13 design requirements. • Sheet 3/7 o Provide Standard Notes from Section 2-5 of the DCSS. • Sheet 4/7 o Provide flow arrows on the grading plan, in addition to spot elevations, to clarify flow direction. • Sheet 5/7 o Call out the type of water quality treatment facility proposed on the Plan View. o Provide rim, invert, and lid type information for the storm drainage system in the Plan View. o Provide proposed contours in the Plan View. • Sheet 6/7 o Control Structure Detail: ■ Labeled as SDMH #3, but it appears from Sheet 5/7 this should be labeled as SDMH #1. Correct as appropriate. ■ Correct reference to "EDDS Std Dt15-270A". Reference City of Everett Standard Plan. ■ Provide flow arrows in the plan view. ■ Rectangle Notch Weir width of 1/16" is less than the allowed minimum width of 1/4" per DCSS 4-2.3(6). ■ Call out spacing of handholds (or steps), and reference Standard Drawing 609. ■ 12-inch diameter (D) outlet pipe requires 1.5-foot distance (1.5 x D) between the outside wall of the structure and pipe connection is required per Figure 3.2.9 in Vol. III of the SWMM. ■ Provide minimum 2-foot width from ladder to shear gate and all other appurtenances per Standard Plan 415 ■ Call out 1-foot section of riser attached by gasketed band to allow removal per Figure 3.2.9 in Volume III of the SWMM. 0 2-Cartridge BayFilter Manhole: ■ Provide flow arrows in the plan view. Page 5 of 6