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C~ (j) BiE Game Winter Ranee. Surface use (including monitoring ac[ivi[iesj, should be scheduled [c minimize adverse impacts on elk from December 1 to Aprit 30. Unscheduled use may be allowed in emergency situations with notice and coordination with the Forest Service. (k) ToAOaraphv. (1) The operator/lessee shall secure adequate baseline data to quantify the existing surface resources on and adjacent to the lease area. Existing data may be used if such data is adequate for the intended purposes. The study shall be adequate [o locate, quantify, and demonstrate the inter-relationship of the topography, geology, surface hydrolog}, vegetation and wildlife. Baseline data will be established so the[ future programs of observation can be incorporated at regular intervals for comparison. (2) The operator/lessee shall establish a monitoring system to quantify the progressive and final effects of underground mining activities on the topographic surface, underground and surface hydrology, and vegetation. The monitoring system shall utilize techniques that will provide a continuing record of change over time. The monitoring shall incorporate and be an extension of the baseline data. (3) Exploration, drilling and other development activity would not be allowed on NFS lands in the LBA tract during the period from December I to April 30. In the event of an emergency, surface use (including drilling) may be allowed with authorization from the Forest Service. (4) No surface occupancy or use would be allowed on the LBA tract where slopes aze greater than 60 percent. (5) Surface occupancy or use would be controlled on lease tract slopes between 40 and 60 percent. Before any such occupancy or use on lands with such slopes, a special interdisciplinary team (IDT) analysis and mitigation plan detailing construction and mitigation techniques would be required. The IDT could include specialists such as a soil scientist, hydrologist, landscape azchitect, reclarnation, and a mining engineer. (6) No surface occupancy or use would be allowed on LBA tract lands defined as wetlands by the U.S. Army Corp of Engineers regulations and guidelines. (7) No surface occupancy would be allowed in azeas of high geologic hazard. (I) Subsidence. (I) Except at locations specifically approved by the FS Responsible Official, mining that would cause subsidence will not be allowed under Raven Creek or within a buffer zone defined b}~ n projecting a 25 degree angle of draw (from vertical) from the surface expression of the creek down-'~o they-~ top of the coal seam to be mined. ~ ~_`?. t~ .,~ _ O (2) If subsidence activates a landslide, which adversely affects surface resources, or a docuiri~nted"t~' .N water loss, the operator/lessee shall (where applicable): restore stream channels and surface drainage=vr _~' r protect stream flow with earthwork or temporary culverts; or revegetate, as necessary, to protect agai~r, st ~.~, erosion; or provide other mitigation (which could include water replacement). ~ -' .c n~ (m) Riparian Zones. No surface disturbances will be permitted within a I/8 mile buffer zone (660 f[.) on either side of the riparian zones of Raven Gulch (or a different buffer zone may be established in accordance with [he surface management agency guidelines). Any surface disturbance will require approval of the USFS or BLM responsible official. The USFS will coordinate with the USFWS and CDOW to determine the type and extent of allowable variances. Asite-specific analysis will determine if this stipulation applies.