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PQND is -P- <br />The following criteria were used in the design of the pond. <br />The pond wills <br />~_ <br />1. provide storage for the maximum anticipated inflow <br />~. from a 10 year 24-hour precipitation event plus the <br />maximum 3 year sediment volume, <br />2. nse a trapesoidal spillway which is designed to <br />discharge the runoff from the 25 year 24-hour <br />storm. <br />• 3. provide for the elevation of the crest of the dam <br />to be at least 1.5 feet above the maximum water <br />elevation with the spillway flowing at design <br />depth. <br />4. nse a S ~ inch diameter dewatering pipe at the <br />downstream outlet. The pipe will permit 24-hour <br />detention time for the 10-year 24-hour storm <br />volume. and at the same time provide dewatering of <br />~ the pond to the sediment storage level is less than <br />72 hours. <br />5. >liaimise the amount of disturbed surface area. <br />6. be cleaned when the sediment volume reaches 60~ of <br />capacity. Cleanout will be provided by a piece of <br />` construction equipment operating inside the pond at <br />an as ea of stable, shallow slope. <br />7, be excavated in a manner that allows all topsoil to <br />be removed, stockpiled and re-used in reclamation. <br />B. be inspected during construction by a registered <br />professional engineer. <br />9. the discharge from the pond will meet the <br />requirements as set forth is the HPDES permit. <br />10. be removed during reclamation. <br />CTt+~s P~~ FR.~N~, P©Nd ~ Rc ~ ~ ~ ~ ~ ~ <br />5u4M. ~ ~ ~~ 4Y ~ ~,.Ew~uc~ o~ <br />r t, do-r©a~. ag ~ { ~ 8 `~ ~ T~ L S uJFkS <br />~PP2ov~ Qy ~,,,ep, <br />z <br />