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bulkhead site is not expected to increase substantially after bulkhead construction <br />because no significantly permeable fractures have been observed for the next 3000 <br />feet downstream. <br />The Sunnyside Mine workings are expected to fill with water until an equilibrium is <br />reached between water flowing into the mine workings and water leaving the mine <br />workings via natural fracture pathways. If the ongoing reclamation work in Sunnyside <br />Basin is successful in diverting surface water from entering underground workings, <br />then tht: equilibrium water level in the flooded mine workings is expected to be just <br />below F-level at approximately 11,500 feet ms1 (see Sections 3.3 and 7.1 for details). <br />If surface water inflow to the mine is not substantially decreased, then the equilibrium <br />water level may be correspondingly higher. The absolute maximum possible <br />equilibrium water level is at the elevation of land surface in the Sunnyside Basin <br />(approximately 12,250 feet msl). <br />Although equilibrium water level in the flooded workings is expected to be just below <br />F-level, three additional bulkhead locations have been proposed by SGC to impound <br />water in case it rises as high as the land surface in Sunnyside Basin. A proposed <br />bulkhead in the Terry Tunnel is intended to keep water from flowing out of the Terry <br />Tunnel portal. Two sets of proposed bulkheads on the Brenneman vein, one set on <br />F-level and one set on B-level (at approximately 12,150 feet) are intended to keep <br />water from flowing into the Mogul Mine. Although only one tunnel connects the <br />cunnylwplV aa122511Mar7 993. flpt 26} <br />N~! SIITIO~ HYDRO-SEARCH <br />