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Section 779.15(a) Continued. <br />• <br />Revised 11/20/80 <br />the faulted area is 1.8 x 10-4 (no units). The amount of storage <br />in the coal aquifer was calculated using the method of Lohman <br />(1972, page 8), as follows: <br />Sc = HAS where: Sc = storage capacity, acre-feet <br />H =piezometric head difference from the recharge <br />area to the discharge area, feet <br />A =aquifer area, acres <br />S =storage coefficient <br />Using a 150 foot change in elevation of the piezometric head in the <br />coal aquifer shown on Map 15a, Kerr Piine Area Ground Water Hydrol- <br />ogy, a 3,200 acre aquifer area, and an average storage coefficient <br />of 5 x 10-4, the storage capacity of the coal aquifer is 240 acre- <br />feet. <br />• Ground Water Discharge Characteristics <br />Ground water is discharged through one well and two springs in the <br />mine plan and adjacent area. <br />An inventory of the wells registered with the State Engineers <br />Office was conducted in the spring of 1980. Only one well in the <br />mine plan and adjacent area was found, located in Section 36, T9N, <br />R78W. As previously stated, this well was installed in the Coal- <br />mont Formation by Kerr Coal Company, and is used to supply water <br />for the shop and office facility. The well is permitted for a <br />pumping rate of 15 gallons per minute. <br />A spring inventory was conducted in the summer of 1480. Two inter- <br />mittent springs have been identified in the mine plan area. One is <br />located in Section 22, Township 9N, Range 78W, and has been esti- <br />mated by the USGS as capable of yielding two gallons per minute <br />(BLM, 1980). As previously stated, the source of the water from <br />779-35 as <br />