Laserfiche WebLink
I <br /> Stormwater Management Report Everett, WA <br /> I _ yA ____ <br /> Rectangular Weir Calculator X <br /> ISolve For Depth of Flow v ā¯‘Contracted Ends <br /> IFlowrate cis 5.1800 <br /> Width in 52.0000 <br /> I Depth of Flow in 5.8902 <br /> Coefficient 0.6500 l Select <br /> IIHeight in 6.0000 <br /> Rating <br /> I Velocity fps 2.4354 <br /> Output <br /> Wetted Area ft2 2.1270 OK <br /> IArea ft2 2.1667 Cancel <br /> I Percent Full % 98.1692 <br /> j Help <br /> The rim for the secondaryoverflow, 48-inch manhole will be set at 421 .1 '. Per Figure 1- <br /> e bu e <br /> 5.16, the required head to discharge 5.18 cfs into a 48-inch riser is 0.26 feet. Therefore, <br /> Ithe water surface elevation would be 421 .36' if the secondary overflow was utilized <br /> during the 100-year storm event. <br /> IBased on our review, we anticipate the additional overflow of the stormwater detention <br /> system would allow surface water to discharge directly the property to the north or <br /> Idischarge directly into the Narbeck Creek NGPA. <br /> I <br /> I <br /> I <br /> 1 <br /> PACLAND Job # 50108001 Page 24 <br />