Laserfiche WebLink
4.1.2 Bedrock Storage Coefficient <br /> The characteristics of the storage coefficient in the bulk of the ground-water flow system have <br /> not been affected by excavation of the Sunnyside Mine. These characteristics are described in <br /> section 3.1.3. <br /> The storage coefficient will be equal to 1.0 within the voids created by mining. However, the <br /> actual volume of voids created py mining is relatively small when compared to the total volume <br /> of rock beneath the Eureka and Cement Creek watersheds. <br /> 4.1.3 Potentiometric Surface <br /> The present potentiometric surface in the vicinity of the Sunnyside Mine probably resembles the <br /> pre-mining potentiometric surface (see section 3.1.4) except in the immediate vicinity of <br /> underground workings or major permeable fractures which intersect these workings. The <br /> hydraulic head has been decreased in the underground workings by approximately 830 feet based <br /> on an equilibrium static water level of approximately 50 feet below F level (see section 3.1.4). <br /> Major permeable fractures have a hydraulic gradient toward the mine workings as indicated by <br /> inflow to the American Tunnel level from the Brenneman, Washington, and Sunnyside veins, <br /> among others. Within these fractures the high permeability results in a relatively gentle gradient <br /> toward the mine workings. Ground water from these fractures would have eventually traveled <br /> to natural discharge points along the Cement Creek drainage. Flow from these fractures is, in <br /> sanjuan\sunny\110361\oct9LRpt 32 <br /> a snon ``UI FI 3=BERN2H <br />