1981-11-13_PERMIT FILE - C1981013 (29)

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UNITED STATES DEPARTMENT OF AGRICULTURE SOIL CONSERVATION SERVICE 422 East First St. , Trinidad, CO 81082 6/5/81 Mr. Dave Zeeb CF&I Mining Dept. P.O. Box 316 Pueblo, CO 81002 Dear Dave: Enclosed are soil survey maps, map unit descriptions, and test infor- mation for samples taken in Apache Canyon, and Maxwell mine. The soil at the proposed rock dust bin site was determined to be Prieta loam instead of Noden soil as indicated on the soil map. The site of the proposed waste dump at the Maxwell mine was also Prieta. Soil samples of proposed air shaft sites in Apache Canyon were deter- mined to be Fuera clay loam, and Table Mountain loam. The following information and test results from the soil samples taken for ph, SAR, etc. #1 Rock dust bin site (A - B - Cr profile) Maxwell mine. Al horizon; loam 0 to 11 inches: Ph = 7.2, SAR = 4.0, EC = 0.9. B2t horizon; clay loam 11 to 20 inches: ph - 7.4, SAR - 8.0, EC = 1.8. Cr horizon; hard shale 20 inches. Recommendation: Separate the surface layer from subsoil because of the high organic matter content in the A horizon. Both layers are good growth mediums to establish vegetation and do not have any hazards other than bedrock at a depth of 20 inches. Soluable salts are not a problem in this soil. Soil type is Prieta loam. #2 ?Baste Dump site, Maxwell mine. Al horizon; clay loam 0-2 inches, ph 7.0, SAR 3.9, EC 0.8. B2t horizon; clay 2-14 inches, ph 7.4, SAR 4.6, EC 1.2. C horizon; clay 14-19 inches , ph 7.4, SAR 6.0, EC 1.6. Cr horizon; hard shale. Recommendation: A and B horizons should be stockpiled together because of the thinness of Al and the overall absence of organic matter in the profile. All three layers are good growth mediums for vegetation with sufficient water. This soil does not have problems with soluable salts and ph. Excess fines is the only limitation of this soil . Soil type is Prieta clay loam.