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~, _. _ l.~__ .~~. mCi~- r?~Icma`iGn G~~<. :~1 _.+O __ ~ and hl3-S~. CYCC oaC<filled trap mine pi r and instailzd oe:~acering devices co preparz the pG n(75 for Che OUaI pUrp0i2 of ;?•7 iiTi2 :"it ~CnC 01 3n7 i-J~< ~.aatering. ,?pproval cf the ponds as permanent impG!inpmznr--; :gas given in February 1937 (TR-03>. No reclamation is to take place at the Middle Creek office area until 2005. Reclamation of the Middle Creek office area provides for removal of the structure and restoration of the essential hydrologic functions of the alluvial valley floor that the office complex currently occupies. II. Revisions to the CYCC Mine No. 3 Permit The following revisions to the CYCC Mine No. 3 permit have been submitted to the Division since the issuance of the CYCC Mine No. 3 permit. Each of these revisions have been re-evaluated as part of the midterm review process. A brief description of each revision and the action taken by the Division on each revision is presented in the following paragraphs. Technical Revision No. 1 - Revised Sediment Control Plan provided for primary dewatering devices for ponds M3-S and M3-N, sediment control for the area above the Homestead Ditch and additional drainage controls. Revision approved (November 24, 1986). Technical Revision No. 2 - Request for a reduction in hydrologic monitoring. The technical revision eliminated four bedrock and three alluvial ground water monitoring wells from the monitoring plan. Stream monitoring sites 18, 60 and 99 were also deleted from the program. Bedrock monitoring well sampling frequency was reduced from quarterly to semi-annual. Several water quality parameters were deleted from the full-suite analysis list. An annual spring and seep survey and a commitment to monitor spoils springs on the property were added to the monitoring plan. Revision approved (February 1, 1987). Technical Revision No. 3 - Revision to retain ponds M3-S and M3-N as permanent structures. Revision approved (February 12, 1987) Technical Revision No. 4 - Modification of Rill and Gully Plan. Mine No. 3 had some problems with erosion and, as a result of the previous midterm review, a revision was requested to modify the Rill and Gu11y Plan. Revision approved (May 8, 1989). Technical Revision No. 5 - Incidental boundary change. A parcel of undisturbed land described as SW 1/4 SE 1/4 SE 1/4 of Section 1 of Township 5 North, Range 86 West, was removed from the permit area. Revision approved (May 31, 1989)