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• General <br />Sections G-3.0 through G-4.5 volume 5, on mine <br />water inflow and stream depletion are a general <br />study conservatively made to determine worst case <br />conditions (maximum inflow to the mine and maximum <br />stream depletion). The inflow and stream depletion <br />calculations presented represent the maximum effect <br />of the four Meeker area mines on the ground and <br />surface water system. The effects of mining are <br />assumed to increase from zero before mining to the <br />indicated maximums in these sections. After <br />reaching the maximums indicated, the effects will <br />decrease until the end of mining. Post-mining <br />effects on the ground and surface water system <br />should gradually decrease to zero, except for the <br />• permanent change in the storage coefficient of the <br />collapsed coal seam and overburden due to the coal <br />removal. The accuracy of detailed predictions on <br />the basis of available data is very limited and any <br />prediction of hydrologic consequences based on them <br />would be just as inaccurate. However, the <br />hydrologic monitoring program, begun in 1979 and <br />described in Sections G-2.1.3 and G-2.2.2 will <br />provide a sound basis for evaluating the <br />generalized predictions already presented. <br />Basic data used in mine inflow and stream depletion <br />calculations were collected in the 1979 hydrologic <br />monitoring program. The majority of this data was <br />included in the first nine volumes ~f this <br />application. In the discussion that follows, these <br />data are referenced specifically and, where <br />• appropriate, more summary tables and maps are <br />included. <br />Leonard Rice Gawittrg Water Engireers. tic. <br />