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The following alternative or MDP components were considered but eliminated from detailed study by the IDT, for reasons stated on pages 11-3 to 11-5 in the FEIS. t Little Annie Ski Area as an alternative to the expansion of the Snowmass Ski Area; t Full buildout of the permit area similar to what was approved in August 1'985 I but reversed on appeal; t Expansion onto Burnt Mountain without an East Village portal; . Removal of Burnt Mountain from the permit area; t A single-stage gondola to Big Burn area; t A two-stage gondola from Base Village to Sam's Knob to Baldy Mountain summit (above the Cirque); t A two-stage gondola from Base Village to the Baldy Mountain summit; t Expansion without a gondola; t A Rodeo lot transport lift; and t A variety of optional lift alignments. The most common reasons for excluding these elements from detailed analysis were: they did not respond to the project purpose and need, they were beyond the scope of this document; or they were not feasible or practicable based on physical, biological or socioeconomic constraints. C. REQUIRED MITIGATION AND MONITORING The FEIS contains a comprehensive discussion of specified and recommended mitigation, including the activity to which the measure is applied, the responsible agency(s) for ensuring or administering implementation, and timing/frequency of application, The Forest Service is responsible for ensuring the mitigation of impacts that will occur on-site (on NFSL) , For certain actions on NFSL, other agencies have statutory jurisdiction, such as the COE for wetland impacts and the Colorado Department of Health for stormwater discharge from construction sites, For impacts that will occur off NFSL, the Forest Service has recommended mitigation and monitoring measures that will reduce or eliminate predicted adverse effects, Other agencies with jurisdiction will be responsible for administering these measures. In certain cases, the Forest Service will delay approval for implementation of on-site actions until the appropriate commitments and agreements are secured by the permittee and presiding agency, Such will be the case with the mitiga.tioJ;l of transportation and air quality impacts, Below is a brief synopsis of the principal mitigation measures a.dopted for the significant resource/issue areas: 1. Watershed Resources . Implementation and monitoring of State/EPA endorsed "Best Management practices" (BMP's) for all ground-dhturbing activities, These include 63 measures for erosion c.ontrol, eight ;measures to reduce geologic hazards, and nine measures dealing with urban runoff, . Avoidance of, minimization of, and/or compensation for wetland impacts. . Assessment of water-user fees to offset costs of research and water rights acquisition for endangered fish, This requirement was specified in the Biological Opinion issued by theUSDI Fish and Wildlife Service to mitigate impacts of water depletion in the upper Colorado River basin, . 'MainteJ;lance of a gaugiJ;lg system at the Snowmass Water and SaJ;litatioJ;l diversioJ;l on Snowmass Creek to track the amount of water being pumped for snowmaking purposes, Summary . 22