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mine. The increase in surface runoff from this small area is insignificant when compared to the much Luger flow in the North Fork of the Gunnison River. No significant changes to water quality are expected to occur as a result of mining at the Bear Mine. The water quality of surface runoff from the undisturbed permit area will not be affected by mining. No subsidence problems are anticipated which could increase Landslide frequency in the permit area, and increase the amounts of dissolved and suspended solids in adjacent streams. Water quality of surface runoff from the disturbed area is controlled by NPDF.S discharge limitations. Infrequent discharges from the Bear sediment ponds must meet receiving stream standards and, therefore, not degrade surface water resources. No ground water discharge is expected to result from mining activities at the Bear No. 1, 2, and 3 Mines. No significant amounts of ground water enter the Bear Mine workings and no water has been discharged from the mine. No impacts to the alluvial valley floor are expected to result from disturbance of the alluvial deposits underlying the Bear No. 3 facilities. Disturbance of the alluvial material is not expected to significantly reduce the quantity or quality of the alluvial material underlying the facilities area. Dilution of waters passing through the alluvial deposit will mitigate any downstream effects of mining at • the Bear Mine. Ground water quality and quantity in the alluvial material underlying the Bear No. 3 facilities are closely related to water quality and flow of the adjacent North Fork of the Gunnison River. Ground water flow in the alluvial material is controlled by the water level and gradient of the North Fork of the Gunnison River. Water leveLS in the alluvial material are generally 2.0 to 6.0 feet below the Lrnd surface. Approximate ground water flow through the alluvium underlying the facilities area may be calculated by assuming the alluvial deposit depth (t) and hydraulic conductivity (k) and determining an average hydraulic gradient (g) and flow path length (b). Values for these variables are substituted into: Q=~ ' Where Q is flow in CFS. If: t = 20 feet; k = 0.0328 feet/sec; 1 = 500 feet; and, g = 0.016 foot/foot, Q = 0.0328(20)(500)(0.016) = 5.25 CFS. • Comparison of the calculated flow through the alluvium (5.25 CFS) with the average minimum flow recorded for the North Fork of the Gunnison River (39.09 CFS) 34