Laserfiche WebLink
<br /> <br />POND {5 -Pl <br />The f olloriag criteria rere nsad in the design of the pond. <br />The pond rill: <br />_ 1. provide storage for the siaximum anticipated inflow <br />from a 30 year 24-hour precipitation event plus the <br />siszimum 3 year sediment wlume. <br />_ 2. nse a trapesoidal spillray rhich 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 rater <br />elevation rith the spillray floriag at design <br />depth. <br />4. use a Sa inch diameter deraterinq pipe aL the <br />dornstzeam outlet, The pipe rill permit 24-hour <br />detention time for the 10-year 24-hour storm <br />volume, and at the same time provide deraterinq of <br />~ the pond to the sediment storage level in less than <br />72 hours. <br />5. minimize the amount of disturbed surface area. <br />l <br />6. be cleaned rhea the sediment wlume reaches 601 of <br />capacity. Cleanout rill be provided by a piece of <br />` construction equipment operating inside the pond at <br />an area 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 />8. be inspected during construction by a registered <br />professional engineer, <br />9. the discharge from the pond rill acct the <br />requirements as set forth in the NPDES permit. <br />10. be removed during reclamation. <br />CTt~ ~S P~~ ~Rfln~l. P©N~ ~ RE ~ ~ ~ - ~ ~ <br />5uC3fv~ ~ i -rE~ 4Y ~~ G•E~~uct O~ <br /> <br />~ F,+c-roaErz. ~9 <br />~PP2ov~ <br />1 1~8`~~ T~6S u~AS <br />QY ~~, <br />z <br />