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• fracturing or disturbance. However, this has not been a problem <br />with past mining in this area. The springs within the proposed <br />mine area are the result of perched aquifers lying above the seam <br />to be mined. Although there is a potential for disturbance of <br />these springs, they are not known to have been put to any <br />beneficial use and also, previous mining in the area seems to <br />have not caused any interruption of their flow. <br />2.1 Quantity <br />Two aquifers have been identified within the project area <br />and adjacent area: the unconfined aquifer of Oak Creek alluvium <br />and the confined aquifer below the Brookside coal. The <br />unconfined aquifer in the Oak Creek alluvial fill is recharged <br />from surface runoff in the creek. What is left from being <br />diverted or pumped into the Rockvale municipality water system <br />discharges as baseflow into the Arkansas River. Mining activity <br />at Twin Pines No. 2 Mine is not likely to impact the quantity of <br />• the water in the alluvium of Oak Creek as the beds dip to the <br />southeast, away from the creek, and the coal seam to be mined is <br />at a higher elevation than the alluvial aquifer. <br />The confined sandstone aquifer identified within the project <br />area at TP-W1 lies 2 to 3 feet below the coal seam to be mined <br />and may be extensive throughout the project area and adjacent <br />area. The interval between the aquifer and the coal is occupied <br />by a shale bed. Only one monitor well has been completed in this <br />aquifer and no pump tests have been carried out to determine its <br />characteristics. Yield is estimated at a maximum of 6 gpm and <br />more likely at 1 to 2 gpm. Recharge to this aquifer takes place <br />a[ its outcrops in the north, east and southeast of the project <br />area. Direction of flow is expected to be controlled by the <br />Chandler Syncline whose axis trends more or less north - south. <br />The axis crosses the proposed underground workings near where <br />these vorkinge lie under the South Oak Creek (see Surface Geology <br />• and Top of Brookside Coal drawing). <br />JFSA-67 <br />