Laserfiche WebLink
2.05.3(4) Ponds, Impoundments and Diversions <br />(a)(i) The Sedimentation Control Maps, Drawing Nos. 117 & 127, show the <br />location of the sedimentation ponds, the collection ditches and drainage areas. Ponds <br />A and B and three collection ditches provide sedimentation control for Mining Area 1. <br />Ponds D and E and two collection ditches were to provide sedimentation control for <br />Mining Area 2. Pond C is no longer required, see Exhibit 9 page 9-6. Mining Area 3 <br />requires one sediment pond, pond F, and four collection ditches. Mining Areas 2 and 3 <br />were not developed so ponds D, E and F were not be constructed. <br />Detailed design information for the sedimentation ponds, spillways, inlet <br />channels, collection ditches and dewatering devices is included in Exhibit 9. Drawing <br />Nos. 117A - 117E and 128 show detailed plan and section views of each pond, <br />spillway, inlet channel and collection ditch. <br />The remaining discussion will only address ponds A and B since they are <br />the only ponds constructed. <br />Pond A and B are temporary impoundments. The impoundments will be <br />left in place until the disturbed area is reclaimed and it is demonstrated that the <br />requirements of 4.05.2(2) are met. <br />• A soil loss demonstration for the reclaimed disturbed area is incorporated on <br />pages 2.05-8iv-8vii and demonstrates compliance with Rule 4.05.2(2). The <br />demonstration shows the reclaimed area will contribute less suspended solids to stream <br />flow or runoff outside the permit area as compared to untreated drainage from the <br />natural surrounding premining area. A map of the baseline and revegetated areas is <br />shown on page 2.05-8vii. <br />(A) The sedimentation control plan was prepared under the <br />direction of James E. Stover, P.E., Colorado Registration No. 19230. <br />(B) The location of the sedimentation control features is shown <br />on Drawing Nos. 117 and 127. Cross sections of the sedimentation control features are <br />shown on Drawing Nos. 117A -117E and 128. <br />(C) The preliminary hydrologic and geologic information required <br />to assess the hydrologic impact of the structures is contained in Exhibit 9. <br />(D) Not applicable. <br />(E) All detailed design information is included. <br />(b) The sediment level in the ponds will be monitored on a quarterly basis and <br />noted on the quarterly pond inspection reports required under Rule 4.05.9(14). The <br />TR-10 2.05-8 09/09 <br />7R-/D <br />/3•pC?•2G?9