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Attachment 2 <br />est Vadnais utlet ydroCA odel u ary <br />Type II, 24-hour, 1.00-year Rainfall = 5.90 inches <br />TKDA run 2/19/04 <br /> roposed* <br />At Jiggs Pond Existing *Includes 4 cfs base flow <br />from West Vadnais outlet at <br /> time of storm event <br /> (no additional area) <br />Draina e Area - ac 35.3 42.1 <br />Peak Inflow -cfs 50.63 55.09 <br />Peak Outflow -cfs 50.9 35.84 <br />Normal Water Level 873.50 (invert elevation <br /> twin 36 inch CMP) 873.50 <br />100-Year Hi h Water Level 876.3 875.8 <br /> 23.828 <br />Volume inflow -acre-ft 10.316 (West Vadnais outlet <br /> portion ~ 7.9) <br />- The drainage area to Jiggs Pond (excluding the area tributary to West Vadnais <br />Lake) is increased by 6.8 acres. <br />- Peak inflow to Jiggs Pond is increased from 50.63 cfs to 55.09 cfs. <br />- Peak discharge from Jiggs Pond is decreased from 50.9 cfs to 35.84 cfs. <br />- The Normal Water Level of Jiggs Pond is unchanged. <br />- The 100-Year High Water Level of Jiggs Pond is decreased from 876.3 to 875.8. <br />- The total volume of water reaching Jiggs Pond increases from 10.316 acre-feet to <br />15.92$ due to the "Unweave the Weave" project alone (without the West Vadnais <br />outlet being constructed). Adding the conservative condition of the West Vadnais <br />outlet pipe flowing full in the Proposed condition, an additional 7.9 acre-feet of <br />water reaches Jiggs Pond and is directed to Gervais Lake. <br />3/19/2004 6 <br />