Laserfiche WebLink
OR Site Area <br />Time of Concentration (T�) Off-Site Flow = 36.77 min. <br />TcReach - ShoM L: 300.00 ns:0.4000 p2yr: 1.55 s:0.1200 <br />TcReach - Shailow L: 100.00 ks:5.00 s:0.4800 <br />011=Site Area <br />voe tA � <br />Off-Site Area H dro ra h Summaria <br />Prccip. Pak F1mv Vdume Time of Peak <br />From the table above for the 6-month storm event, the required dwd atonge volume is <br />1.56 Ac-ft or 67,792 it3. The dad storage volume provided is 74,913 R�. The dead <br />storage is divided into two portions, pennanent dead storage (below 505.50) and flow <br />through dead storage (from 505.50 to 507.00). The two-celled wet pond is designed <br />according to the City of Everett requirements as follows: <br />• Permanent dead volume is at least 50 percent of the total dead volume: <br />Permanent dead volume provided = 35,171 ft3 <br />Total dead volume required = 67,792 ft' <br />Ratio of permanendtotal = '�"�/6�,� = 52 •/. <br />{>SO°/. (OK)} <br />• Cell 2 contains at least 60 percent of the pertnanent dead volume: <br />Cell 2 pertnanent dead volume provided = 20,928 ft3 <br />Total permanent dead volume provided = 35,171 ft3 <br />Ratio of permanent Cell 2/total = 30'�/��,��� = 60 •/. <br />{>60% (OK)} <br />The permanent storage depth in Cell 1 was designed in the 3-6 foot range (3 feet) and the <br />pe�manent storage depth in Ce112 was designed in the 0-2 foot range (1.33 feet). <br />STORM DRAINAGE REPORT FOR VIKING FREIGHT/IvtERRILL CREEK PAGE 5 <br />