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seriel xo. c-13sz C027TROLf.BD 6IIRYIlCB U88 fiTIPULATIOx G8N8RAL YORSST 6urface occupancy or use is subject to the following apecisl operetiag constraints. 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. kxisting data may be used i£ 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 foz comparison. .The operator/lessee sha21 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 grovide a continuing. record of change over time and an analytical method for location and measurement of a number of polnys over the lease area. The mo:iitorinq shall incorporate and be an extension of the baseline data. _ If sub~side_nce __a_c_t_iv_ates a landslide___w_hich_ adveis_ely _af_fects 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 aecessazy Co protest against erosion; or a. Restore or replace surface structures or compensate the owner of those surface structures; or 5. Provide other mitigation (which could inelude~water replacement). On lands described below: National ForesC System and Bureau of Land Management lands within the entire lease.