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• ~ iii iiiiiiiiiiiii iii TRAPPER MINING INC. 999 November 13, 1990 Mr. Jim Stevens Colorado Mined Land Reclamation Division - - 215 Centennial Bldg. - - 1313 Sherman St. Denver, CO 80203 = _ Dear Jim: - - - - ' -~ ~' Subject: Overview of [he CMLRD/OSM Joint Inspection of Trapper Mine on 11/6/90 and 11(//90. Following is a list of potential non-compliance i[etns that were identified and mitigative measures performed by Trapper during the joint CMLRD/OSM inspection of Trapper Mine on November 6-7, 1990. 1. A small gully was identified within a cropland area between the reconstruc[ed East and West No Name drainages. This gully is not active as vegetation was established in the gully bottom. The gully was not identified during our annual rill and gully inspection. Trapper did, however, correct this oversight by repairing the Bullied area with rock rip rap on 11/12/90. 2. A small gully was identified within the No Name drainage channel immediately upstream of No Name pond #~3. A loader vyas dispatched to the area immediately and appropriate repairs (rock rip rap) were performed [o cortect [he problem on 11/6/90. 3. Three topsoil stockpiles (two in West Buvard and one in East Buuard) were identified as being lightly vegetated with a potential of having inadequate vegetation for erosion control purposes. However, there was no evidence of excessive erosion on any of the three piles during the inspection. As part of Trapper's weed control program all three piles in question were sprayed with appropriate herbicide in June , 1990, to control noxious weeds (Canada Thistle). Following spraying, [he piles were all drill seeded with Trapper's approved topsoil stockpile seed mix. In the fall of 1990, live- stock were allowed access to these piles as they are located within an approved livestock grazing lease area. The result of livestock grazing on the piles added to the illusion of light vegetation response on the piles. As a mitigative measure, Trapper immediately fenced all three stockpiles (three strand barbed wire) to ensure that future livestock grazing within the area would not impact the vegetation response on these piles. Additionally, Trapper re-seeded (broadcast) all piles in question with our approved topsoil stockpile seed mix. All fencing and seeding efforts were com- ple[ed by 11!7/90. 4. A segmen[ of a diversion ditch surrounding a topsoil stockpile located north of our Browning pit stripping area was removed. The ditch was accidentally destroyed as a result of scrapers hauling topsoil to the stockpile area. The error was identified and Trapper responded immediately by resurveying and reconstructing an appropriate ditch. The ditch was offset far enough away from the pile as to accommodate addi[ional topsoil placement during 1990 field season (currently adding topsoil to this pile). All construction activity was completed by 11(7/90. 5. A small berm was identified in the emergency spillway of Trapper's Industrial Waste Pond. This berm was not part of the spillway design and was removed on 1118/'90. (Prior to the removal of the berm, Trapper initiated a survey and concluded that adequa[e impoundment freeboard (1.2') existed even wi[h the berm intact.) 6. Water was identified seeping under the parshall Ilume established on Johnson Gulch pond #10. The source of the water was either from main stream seepage under the flume or Crom seepage located within an undis[urbed area a[ the toe of the pond embankment. On 11/13/90, Trapper used sodium bcntonite around the upper and lower end oC the flume in an effort to seal any seepage under [hc cs[ablished flume. P.0. Box 187 Craig. Colorado 81626 (303) 824-4401