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(e)(2) B~ Game t~!inter3tanee. If areas are determined by the Colorado Division of Wildlife (CDOWj to be mule deer and elk crucial winter range, the following stipulation shall be applied: a) Coai related facilities and surface disturbance, except subsidence, will be authorized in the review azea only if no practical altematives exist. The BLM and USFS will coordinate with the CDOW to detertnine the type and extent of allowable variances. Coal exploration, facility construction, and major scheduled maintenance will not be authorized within crucial winter ranges from December 1 through Apri130. All unavoidable surface disturbances within the crucial winter ranges during these times will require approval of the BLM and USFS authorized officer. (f) Riparian Zones. Riparian zones aze present within the review azea and aze suitable for coal leasing only with inclusion of the following special stipulations to protect resident and migratory bird species: a) A 1/8 mile buffer zone (660 ft) will be protected on either side of Raven Gulch (or a buffer zone may be established in accordance with [he surface management agency guidelines). No surface disturbances, except surface subsidence, will be permitted within these buffer zones unless no practical altematives exist All unavoidable surface disturbances will require approval of the USFS or BLM authorized officer. The BLM or USFS will coordinate with the USFWS and CROW to determine the type and extent of allowable variances. A site specific analysis will determine if this stipulation will apply. (g) Subsidence. (1) Except at specifically approved locations, mining that would cause subsidence will not be allowed under Raven Creek or within a buffer zone defined by projecting a 25 degree angle of draw (from vertical) from the surface expression of the creek down to the top of the coal seam to be mined. . (2) Tf subsidence activates a landslide, which adversely affects surface resources, or a documented water loss, the operator/lessee shall (where applicable): restore stream channels and surface drainage or protect stream flow with earthwork or temporary culverts; or re-vegetate, as necessary, to protect against erosion; or provide other mitigation (which could include water replacement). (h) Topography. (1) The operator/lessee shall secure adequate baseline data to quantify [he 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 to locate, quantify, and demonstrate the inter- relationship of the topography, geology, surface hydrology, vegetation and wildlife. Baseline data will be established so drat future programs of observadon can be incorporated ai regulaz intervals for comparison. (2) The operator/lessee shall establish a monitoring system to quantify the progressive and final effects of underground mining activities on dre [upugrapluc swfacc, underground and surface Irydrulugy, 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) No surface occupancy or use would be allowed on LBA tract )ands defined as wetlands by [he U.S. Army Corp of Engineers regulations and guidelines. Stipulations Applicable to the National Forest System Lands: (i) Standard Stipulation for Department of Agriculture Lands. Attached to and made a part of the coal lease. •