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III IIIIIIIIIIIII III STATE OF COLUtc~liU MINED LAND RECLAMATION DIVISION Department of Natural Resources t3t3 Sherman St., Room 215 Denver, CO 80203 303 866-3567 FA x: 303 832-8106 OF'~~/Q tip= A~ NP 'J ' ~8 T6' Roy Ramer. Gwemor Michael B. Long, Division Director DATE: August 27, 1992 T0: Steve Shuey, Reclamation Specialist FROM: Jeff Martin ~~. ~. RE: Somerset Mining Monitoring Plan Company 1991 AHR, Permit tJ C-81-022 The operator is in full compliance with the provisions specified under 4.05.13 of the regulations and with provisions specified by the agreed upon monitoring plan set forth in volume one of the permit for both surface and ground water during 1991. Since the cessation of mining at the Somerset Mine in 1986 through november of 1991, there has been no recorded discharge at any NPDES outfall, and therefore, no repel-ting of any erceedances. Prior to 1991, the operator monitored water quality, and flow or water level at sites H-1 (surface), H-10 and 8-6 (ground) in full compliance with the moni*.oring program. The operator wili continue to mcnitrr these sites. Cue to planned mining in the Sanborn Creek permit area, the operator began monitroing drill holes SC-I, SC-? and SC-3 (Groundwater in Rawlins Sandstone and U.S. Steel Mine No. 3) and U-l, S-I, S-2, NF-I and NF-2 (Surface water in unnamed drainage, Sanborn Creek, and the North Fork of Gunnision River) During 1992, there was no recorded discharge at NPDES outfall 011 in the Sanborn Creek permit area. The following comments pertain to the Monitoring Plan 1. Should discharge form NPDES outfalls occur in the inactive Somerset Mine permit area, the Division may want to request monitoring commence at a site downstream of the confluence of Hubbard Creek and North Fork of Gunnison River (NFGR). Currently, NF-2 is the fur~hest downstream site on NFGR monitored by the operator and is upstream from the Somerset Mine permit boundary (See Hydrologic Area Map E8-32861.