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• • • Pia a S-18 Summary February 2000 Table S-1 Summary of Impacts by Alternative for Each Issue Issue/Concern Alternative A B C D SVeam Sedimentation None-no mining Low-Moderate Low-Moderate Low from lease trails or explgration Water Quality Degradation None-no mining Low Low Low from lease tracts or exploration Impacts to Threatened and None-no mining Negligible Negligible Negligible Endangered Aquatic Species from lease tracts or exploration CULTURAL RESOURCES Impact to Cultu2l and Historic Sites None-no mining Low Low Low from lease tracts or exploration GEOLOGY/SUBSIDENCE Potential Effect to Curecanti-Rifle None-no mining None None None 230/345 kV Electric Transmission from lease tracts Line or exploration Potential Effect to Tenor Creek None-no mining Low Low Low Reservoir from lease tracts or exploration Potential Effect to Tertor Creek None-no mining Moderate Moderate Negligible from lease tracts or exploration Potential Effect to Hubbard Creek None-no mining Moderate Moderate Negligible from lease tracts or exploration Potential to Aggravate Landslides None-no mining Law Low Low from lease Vads or exploration Land Use Aces Disturbed (total) Not Applicable l0 33.5 33.5 33.5 lease tracts or exploration Land Disturbed by Ownership (%) Not Applicable to BLM lease tracts 26 27 27 Forest Service 59 62 62 Private 15 11 11 Noise' Noise Effects From Surface Low -Moderate Law -Moderate Low -Moderate Low -Moderate Facilities Noise Effects From Coal Trucks Low -High Low -High Low -High Low -High Noise Effects From Coal Trains Moderate -High Moderate -High Moderate -High Moderate -High • Noise effects very based on distance from the noise source. rr__i r_..r____-__._~ r.___• n~~s...-..~--~