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• iii iiiiiiiiiiiiiiii DEPARTMENT OF NATURAL RESOURCES Davitl H: Getches, Executive Director MINED LAND RECLAMATION DIVISION DAVID C. SHEITON, Director Richartl D. Lamm Governor DATE: May 17, 1985 T0: Mc Clane Canyon (C-004-80) and Munger Canyon (C-020-81) Files FROM: Jim Pendleton "~ I..~L`~~ i RE: Notes on Field V' ~ ation of May 14, 1985 I met with John Walters at the Mc Clane and Munger Canyon mine sites, in the presence of Fred Banta, Tom Gillis, and Steve Renner. We examined stereographic air photos of the Mc Clane Canyon surface facility area. Based on that photographic examination, it is my opinion that the surface facility area qualifies as a steep slope mining area. Vertical sandstone cliffs existed at the location of the Mc Clane Canyon portals. I also discussed possible reclaimed configurations for the surface facility area with Mr. Walters. We then toured the surface facilities area to examine the surface drainage facilities and discussed reconstruction of stream channels. John Walters hopes that bedrock will be encountered at approximately channel design gradient. If not, careful riprap and energy dissipation designs will be necessary to maintain equilibrium channels. We drove up the Munger Canyon mine bench access road to ascertain how the road cuts and bench cuts have been performing. Slope failures were evident in the final road cut before the bench and in the slope cut above the bench. Both of these slides are relatively small in extent but will require remedial treatment. During our return drive to Loma, we rendezvous with Mr. Walters to view the proposed Munger Canyon waste pile. The site appears to be a desirable site for the placement of waste. JAP/ddt cc: Tom Gillis 0546E 423 Centennial Building, 1313 Sherman Street .Denver, Colorado 80203 Tel. (303)866-3567