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Preliminary Adequacy Review <br />Bear Coal Co., Inc. - Bear Mine <br />Paqe Two <br />2.09,4 Cultural and Historical Resources <br />No further action concerning cultural resources is required of the Bear Mine unless <br />further surface disturbances are to take place and/oz cultural resources discovered. ' <br />2.04,5 General Description of Hydrology and Geology <br />1. The applicant must supply complete geology and hydrology maps of the general <br />area. The geology map should delineate faults, folds, landslides, intrusive evidences <br />and major jointing. The hydrology map should include the location of regional <br />alluvial and bedrock aquifers, as well as the direction of ground water flow in the <br />general area. The location of the seventy-seven (77) springs mentioned in the text <br />must also be Zocated on the hydrology map. (2.04.5(1)(b)J <br />2.04.6 Geology Description <br />2.04.6 (2) Underground Mining <br />1. She logs of the drillholes located on map 2.04.6(2)(a)-3 should be provided <br />with the depth where first water was encountered indicated on each log. This infor- <br />mation is needed to facilitate the determination of probable hydrologic consequences <br />of mining. (2.04.6(2) (a) (i v) (A)) <br />2. The analysis of the C seam coal should differentiate by percentage the sulfur <br />compounds encountered. Those of concern are pyritic sulfur, organic sulfur and <br />sulfate sulfur. The different sulfur compounds vary in toxic and acid forming <br />capabilities, <br />3. On page 42 the applicant states that water is pumped from the mine to maintain <br />the competency of the floor shales for safety re.ssons. She applicant must provide <br />data on the rate of production of mine water by mine inflow data or aquifer tests <br />and the methods of disposal of this water. <br />2.09.7 Hydrology Description <br />2.04.7 (1) Groundwater Information <br />1. If insufficient data is available to determine water table extent and storage <br />capacity from ARCO's observation wells, as stated on page 33 of the permit, Bear <br />Coal must supply a water monitoring plan to determine this baseline information. <br />Recharge, storage and discharge characteristics must also be determined (see Section <br />1.02.6(3)). (2.09.7(a) 6 b)) <br />2. The low permeability of the sandstone aquifers must be documented (page 45). <br />(2.04.7(b)) <br />3. The applicant must address the probability of vertical migration ^f groundwater <br />through fracture and fault zones. (2.09.7(a & b)). This can be accomplished through <br />a mapping of underground seeps and springs on a mine workings map. <br />