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-43- <br />Data collected for the Somerset Mine estimates the annual yield in Hubbard <br />Creek to be 29,700 acre-feet per year (8% of the mean annual yield of the <br />North Fork of the Gunnison - 340,000 acre-feet per year). The total depletion <br />of the flow in Hubbard Creek due to the combined impacts of the Somerset and <br />Blue Ribbon mines may be 0.09 cfs (39 gpm or 56,160 gpd), 0.07 cfs (31 gpm or <br />44,640 gpd) coming from inflow measured in the Somerset Mine adjacent to or <br />under Hubbard Creek, and 0.02 cfs (8 gpm or 11,520 gpd) coming from withdrawal <br />of water by the Blue Ribbon Mine. This total depletion amounts to about 0.18% <br />of the average stream flow (49.3 cfs) and 3.9% of the low flow (2.23 cfs) in <br />Hubbard Creek as measured above the Blue Ribbon Mine. <br />Cumulative Hydrologic Effects on Ground Water <br />and Surface Water Resources - Finding <br />An assessment of the probable hydrologic consequences of the proposed mining <br />operation and an assessment of the probable cumulative impact of all <br />anticipated mining in the general area on the hydrologic balance has been <br />made. Pursuant to Rule 2.07.6(2)(c), the Division finds that the proposed <br />Orchard Valley Life of Mine mining operation including the west portal <br />ficilities has been designed to prevent material damage to the hydrologic <br />balance outside the proposed permit area. <br />