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''_',, approximately one million dollars per year. Severance, black lung and • reclamation costa would total about $850,000 a year. Soils If a proposed vent shaft and access roa3 were constructed on public land, increases in erosion could occur. Disturbance, especially to the Fughes and Curecanti soils, could result in mesa Boil movement. Accelerated erosion could also occur from surface disturbance due to subsidence on the lower elevation areas that are overlying and adjacent to areas where complete coal extraction ie planned. B. Alternative Two - No Actioa Environmental Coneacuencss There are no known additional impacts to the following resources: climate, air quality, recreation, soils, mineral resources, water resources, vegetation, wildlife, land use, cultural or visual resources. If the lease ie not granted, there is a high likelihood that the coal will never be mined. In that case, this alternative would result in a lose of production to the nation of 10.5 million tone of coal, valued at $168 million and a lose to the local and state economies of the benefits to employment, income and public revenue listed under Alternative One. If the coal in the proposed lease area is mined at another date, it will be done at a higher coat due to the need for reentry. While the economic benefits of Alternative One might still be enjoyed, they would be achieved at a higher coat and hence, less efficiently. Or the bypassed coal may never be mined due to technical difficulties and economic constraints. • There are no Mitigation Measures or Residual Impacts resulting from Alternative Two. V. MITIGATION MEASURES No mining related disturbances will occur within 100 feet of the outside line of the right-of-way of Colorado State Highway 133 ae shown on Appendix I - Map 1. The angle of draw used to protect the State Highway from subsidence will be dictated by the approved ClII.RD Mining and Reclamation Plan, (the estimated angle of draw ie 25 degrees). However, mining related disturbances may occur if, after public notice and the opportunity for public hearing in the locality, a written finding is made by the Authorized Officer that the interests of the public and the landowners affected by mining within 100 feet of a public road will be protected. A 1/8 mile buffer zone will be protected on either aide of the riparian zones along the North Fork of the Gunnison River and in Hawksnest Canyon (Appendix I - Map 2). No surface disturbances, except surface subsidence, will be permitted within these buffer zones unless no feasible alternatives exist. All unavoidable surface dieturbancee will require approval of the BLM'e Authorized officer. The BLM will coordinate with the Fieh and Wildlife Service and the Colorado Division of Wildlife to determine the type and extent of allowable variances. With respect to bald or golden eagle Heats which may be established on the review area during the life of the project, the following shall be applied. No new permanent surface facilities or dieturbancee shall be located within a 1/4 mile radius buffer zone around each bald or golden eagle neat site. No surface activities will be allowed within a 1/4 mile radius buffer zone around each eagle neat site from March 1 to July 1. Any proposed activities in, or adjacent • to, these buffer zones (except routine maintenance) will require approval from the BLM, on a site-specific basis, after consultation with the U.S. Fish and Wildlife Service. 17