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Serial No. C-1362 CONTROLLED SIIRFACS II58 STIPIILATION GSNgu nT• FORBST Surface occupancy or use is subject to the folloviag spacial operating constraiata. underground mining operations will result in surface subsidence. The operator/lessee shall perform a study to secure adequate baseline data to quantify the existing surface resources oa 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 geology, topography, surface hydrology, vegetation and wildlife. Baseline data will be established so that future programs of observation can be incorporated at regular intervals for comparison. The operator/lessee shall establish a monitoring system to locate, measure and 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 which will provide a continuing. record of .change over time and an analytical method for location and measurement of a number .of. points over the lease area. The monitoring shall incorporate and be an extension of the baseline data. . • If subsidence activates a landslide which adve=sely affects surface resources, or a documented water loss, the. operator shall (where applicable);. ~ ~ ~ ,~ ~ ' 1. Restore stream channels and surface drainage or protect stream flow with earthwork~or temporary. culverting; or 2. Restore affected roads; or 3. ~Revegetate as necessary to protect against erosion; or a. Restore oz replace surface structures or compensate the owner of those surface structures; or 5. Provide other mitigation (which could include water replacement). On laada described below: National Forest System and Hureau of Land Management lands within the entire lease.