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-1�3- <br /> a cr);nhinF�d storage :a;� is �,i 1 . 32 i.re-feet, of which 0.64 acre-feet is <br /> for storage of runoff From a lu-year, 24-hour storm, 0.56 acre-feet is <br /> for sediment storage, and 0. 12 acre-feet is excess storage capacity. <br /> Both ponds are designed to have 6-inch CMP principal spillways and 36 <br /> inch CMP emergency spillways capable of passing the peak Flow from 3 <br /> 25-y ear, 24-hour st,)r lr. <br /> Once the two-year coal processing is completed, an additional pond will <br /> be constructed. Once this pored is completed, the -fl* tot) Q, ponds will no <br /> longer be needed and .rill eventu o o � pr6cess ' <br /> was�The third pon is designed to have a capacity o .1 acre-feet, <br /> or wnicn 1 .25 acre-feet is for sediment storage, 1 .60 acre-feet is for <br /> storage of the runoff from a 10-year, 24-hour storm, and 0.29 acre-Feet <br /> is for excess st'oraye capacity. The pond is designed to have a 6 inch <br /> CMP principal spillway and a 36 inch CMP emergency spillway capable of <br /> passing the peak flow from a 10-year, 2-4-hour storn. <br /> All three of the sediment ponds are designed with principal spillways <br /> located at the top of the runoff storay. level . : al 1.05. E requires <br /> that pond designs provide for a "non-clogging dewatering device or <br /> conduit spillway to remove water storage resulting from inflow". In <br /> order to maintain storage for runoff From a 10-year, 24-hour <br /> precipitation event, this ;)rincipal dewatering device must he located <br /> directly above the maximum sediment storage level . Therefore, th-_ <br /> following stipulation is necessary: <br /> Stipulation No. 3 <br /> WITHIN 30 DAYS OF PERMIT ISSUANCE, THE PERMITTEE MUST REVISE THE <br /> SEDIMENT CONTROL PLANS FOR THE THREE PROPOSE) SEDIMENT PONDS AT TH" <br /> SITE OF THE NEW COAL PjtUCESSI(1G ''A�1STE EL!13ANKMENT. THE PLANS MUST b <br /> 6E REVISED TO INCLUDE ANON-CLUGGING, GATED UEWATERING DEVICE Y <br /> - LOCATED DIRECTLY ABOVE THE MAXIAIJI•1 STJNAGE OF EACH POND. <br /> Sediment Control - General <br /> c °Rule 4.05. 6(7) requires that a certification from a registered � � <br /> professional engineer, certifying that the sediment ponds have been <br /> constructed as designed, be submitted to the Division. The applicant ha <br /> sSN <br /> not submitted the required certification. Therefore, the following � � t <br /> stipulation is necessary: <br /> Stipulation No. 4 <br /> WITHIN SI%( �tUNTHS JF P1_RitIT ISSUAXE, THE PLR.NITTEE SHALL SU3c�I i Pit_ <br /> T'HE DIVISION ';E4TIFICATIUN FROM A „EGISTERED PROF 7:-SSIONAL _-NGI,�E__A, �I�A <br /> r L•. .3f1STPUCT`J HAVE BEAN <br /> ATTEST i?!G THAT i Ht Sc )['�iL.,1 C P�)�JI)'� � �_�_ ���_, <br /> BUILT AS DES116NED. CERTIF?CATIUN OF THOSE PONUS YET TO 3E �� <br /> CONSTRUCTED MUST dE S013MITTE0 IIMEJIATELf FOLLOWING CONSTRUCT:111' C� <br /> r <br />