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iii iiiiiiiiiiiii iii STATE OF COLORADO' Roy Romer, Governor ~~ ~ ~ Q DEPARTMENT OF NATURAL RESOURCES MINED LAND RECLAMATION DIVISION FRED R. BANTA, Olrector - DATE: December 11, 1987 T0: File No. C-81-02G, Canadian Strip FROM: Tony Walden ~ ~ ~a/,/xa r. ~ RE: CONCERNING TOPSOIL REDISTRIBUTION DEPTHS AT CANADIAN STRIP MINE Below are comments on the inspection. The comments include discussion of observations made during the inspection. Comments also describe any enforcement actions taken during the inspection and the facts or evidence supporting the enforcement action. This inspection was conducted by Tony Waldron and Ken 7homan of Mined Land Reclamation Division on November 6, 1987. No operator was in attendance. The weather was cold, windy and overcast with light snow flurries. The primary purpose of the inspection was to collect soil depth information on areas that have been regraded and topsoil ed. It is expected that this data will be used to determine, in part, whether Phase II bond release can be considered at the time it is requested by the operator. To determine the soil depth a sharpshooter shovel was used. The holes were dug deep enough to determine the soil/spoil interface which was noted by a color and texture change. The sampling intensity was approximately 1 sample per five acres with sampling sites chosen at random. A total of 20 sites were selected over a 65 acre area. Results of the investigation are indicated on Map 1 and are tabulated in Table 1 (attached). The soil redistribution plan for this mine calls for reapplication of 18-24 inches of topsoil on average. However, not all the areas proposed to be disturbed were disturbed which could have affected the amount of topsoil available for redistribution. The average depth was 11.3 inches. Four composite soil samples, see Table 1, were also taken at random to check for Salinity and Sodicity Hazards. The samples were taken to ACZ Bookcliffs Laboratory and results will be forwarded to the operator when received. 423 Centennial Building, 1313 Sherman Street Denver, Colorado 80203-2273 Tel. (303) 866-.