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lq:yff Project: Port of Everett- MIE Date: 11/23/2020 <br /> 1601 5th Avenue,Suite 1300 Location: Sheet# <br /> Seattle, Washington 98101 Client: POE Job# <br /> p(206)382-0600 f(206)382-0500 By: ECN <br /> Subbasin Outfall M Orifice Control to Water Quality <br /> Structure High-Flow Bypass Structure-Basin M <br /> User Input <br /> Orifice to Water Quality: <br /> d= ((36.88*Q)/(h)")0.5 <br /> Q= 3.52 (cfs) 1580 (gpm) WWHM Offline WQ Flow, 15min t.s. <br /> C= 0.62 (Plate Orifice) <br /> h= 5.31 (ft) <br /> d= 7.51 (in) <br /> Rectangular Weir Bypass Flows: <br /> Q=C(L-0.2H)H312 <br /> C=3.27+(0.4H/P) <br /> Qioo= 42.50 (cfs) (WWHM Flood,15 minute Time Step) <br /> Q= 38.98 (cfs) Bypass <br /> C= 3.40 <br /> L= 10.00 (ft) <br /> H= 1.12 (ft) Water height above Weir invert at Q100yr <br /> P= 3.56 (ft) <br /> Q= 39.35 (cfs) = 38.98 (cfs) OK <br /> Invert Elevation of WQ Outlet Pipe = 5.12 (pipe i.e. to wet well) <br /> Invert Elevation of Inlet Pipe= 6.87 <br /> Crest Elevation of Weir= 10.43 (MHHW = 9.06) <br /> Elevation of Top of Weir= 11.55 Bottom of Lid EL=11.72 <br /> Diameter of Orifice= 0.63 ft <br /> Orifice to Water Quality Check @ 100yr Overflow: <br /> d= ((36.88*Q)/(h)0.5)0.5 <br /> Q= 3.87 (cfs) <br /> C= 0.62 (Plate Orifice) <br /> h= 6.43 (ft) <br /> d= 7.51 (in) <br /> 10% More flow during the 100 year storm (cannot exceed 10%) <br /> 0K <br />