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• 2.05.3 <br />(ii)(C) Operations and maintenance requirements for ponds B, C, J, K and the gob <br />pile pond are the same. The sediment ponds must be dewatered if they <br />contain water above the maximum sediment level. Pond C must be <br />dewatered between each mine discharge event to assure the pond maintains <br />the capacity to contain the 10-year, 24-hour precipitation event. Dewatering <br />events should occur within 48 hours afterthe storm event or mine discharge <br />which caused the water accumulation. Sediment must be removed from the <br />sediment ponds. Ponds B and C are designed to contain a one year <br />sediment load which is less than the more typical three year sediment design <br />load. Pond J is designed to contain a two year sediment load. Therefore, <br />the sediment from the ponds may have to be removed more frequently. <br />Sediment will be removed from ponds B, C, J & K and the gob pile sediment <br />pond no later than when the ponds are 75% full of sediment. <br />(ii)(D) Sediment ponds B, C, J, K and the gob pile sediment pond will be removed <br />after the site has been reclaimed and the vegetation on the reclaimed site is <br />adequate to control erosion. Pond removal must be authorized by the <br />Division and the untreated drainage from the disturbed area ceases to <br />contribute additional suspended solids above natural conditions. <br />None of the sediment ponds meet the size requirements of this section, <br />therefore this section is not applicable. <br />(b) <br />(c) <br />(d) <br /> <br />PR-07 <br />AoPRovE~ <br />5 ~tz~o3 <br />The sediment ponds are considered temporary ponds and are designed to <br />meet the requirements of Rules 4.05.6 and 4.05.9. <br />Not applicable. <br />Collection ditches and diversion ditches have been designed to comply with <br />the requirements of rules 4.05.3 and 4.05.4. <br />Small Area Exemptions (SAE) <br />The locations of the small area exemptions are presented on Map 20. The <br />Applicant will monitor the flow from the small area exemptions to assure <br />compliance with 4.05.2(3). The Applicant will use its best efforts to obtain <br />samples. The samples will be analyzed for pH, conductivity and total <br />settleable solids. Samples will be in compliance if they contain settleable <br />solid levels of 0.5 mIA or less and the pH is greater than 6.5 and less than <br />9.0. <br />2.05 - 32 - 2/03 <br />