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2.05 APPLICATION FOR PERMIT FOR SURFACE OR UNDERGROUND ACTIVITIES -- <br />MINIMUM REQUIREMENTS FOR OPERATION AND RECLAMATION PLANS. <br />2.05.6 Mitigation of Surface Coal Mining Operation Impacts. (Cont'd.) <br />(3) (b) (iii) (Cont'd.) <br />of monthly water level measurements in drill holes 58, 60, 65, 69, 70, and GR -77. <br />Water quality samples were monitored for field parameters monthly and lab analysis quarterly. The <br />data obtained and conclusions from the interpretation were submitted to the Division in the "Annual <br />Hydrology and Subsidence Reports ". <br />One federally -owned drill hole, GR -77, was included in the groundwater monitoring network. This <br />drill hole was completed by the U.S.G.S. in 1977 in the central part of the East Roatcap Creek <br />drainage. This well monitors the perched aquifer in the sandstone strata above the mine coal seam. <br />The possibility of communication between this perched aquifer and the shallower alluvial /colluvial <br />deposits overlying it exists. Water level in this well fluctuates between 123 and 133 feet from the <br />ground surface and water quality is typical for shallow aquifers. This hole was monitored for depth <br />and samples. <br />DH -58, located in the SE /4 NW /4 Sec. 18, T13S, R91 W, of the 6th P.M., was drilled to a total depth <br />of 1963 feet. This monitoring well, which has remained dry, was also monitored as part of the <br />subsidence monitoring network. <br />DH -60 was drilled to a total depth of 1350 feet. This monitoring well is located in the NE /4NE /4 Sec. <br />14, T13S, R92W, of the 6th P.M.. <br />DH -65 is located in the NW /4NE /4 Sec. 15, T13S, R92W, of the 6th P.M. The total depth of this well <br />is 1655 feet. <br />DH -69 is located in the NE /4NW /4 Sec. 7, T13S., R91W, of the 6th P.M. This monitoring well is <br />drilled to a total depth of 1975 feet. <br />DH -70, located in the NW /4 SW /4 Sec. 17, T13S, R91 W, of the 6th P.M., was drilled to a total depth <br />of 692 feet. The initial water level was measured at 534 ft. DH -70 was also monitored as part of the <br />subsidence monitoring network. DH -70 was monitored for quality and depth. <br />Responsibility for DH -58 and DH -69 will be transferred to the Bowie No. 2 Mine by PR -04 since the <br />wells will reside within the new Bowie No. 2 Mine permit boundary. <br />See Volume 4, Map No. 4 -1 for the locations of all deep bedrock groundwater monitoring wells, <br />Tables 4 -A and 4 -13 for well completion summaries, and Tables 7 and 10 in Volume 10 for <br />lithologies. Water quality data was obtained during the drilling of these drill holes from some <br />random sampling. Enough data was gathered to characterize to deep bedrock water. <br />CWI identified a number of alluvial /colluvial deposits as described in 2.04.7 (1). Only a few of the <br />smallest deposits were scheduled to be undermined during the initial permit term. To gather further <br />information on the deposits, CWI constructed additional shallow <br />PR -04 - 121 - 06/10 <br />PP£oVr_ �D <br />