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2.04.7 (1) (a) <br />• on the Watt and Rodgers wells can be adequately monitored with <br />the three observation holes located at CE-BO-4a, between the wells <br />and the mine permit area. The effects of mining on the Lasater <br />and Cargill wells will need to be monitored on a regular basis <br />to insure adequate water supply. Data on the well is shown on <br />Figure 2.04.5-10a. No data is available on the Carg111 will. <br />There is a pump on the Lasater well that is no longer functional. <br />Permission was not granted to obtain samples on the Cargill <br />well by the present owner. <br />The U.S. Geological Survey Office in Grand Junction is conducting <br />a study of the aquifers associated with the Grand Mesa Coal deposits. <br />Refer to Figure 2.04.7(1)(a)-1 for a letter describing this study. <br />The U.S. Geological Survey Office has indicated that they could <br />provide Grand Mesa Coal with information on the Carqille well if <br />they can obtain it. <br />• <br />The remainder of the domestic use wells in this vicinity utilize <br />aquifers such as the glacial outwash material which will not be <br />seriously affected by mining operation. As described previously, <br />except in the area where the "D" and "E" coal seams lay directly <br />under the base of this alluvial material, the coal seams are <br />adequately isolated from the surface aquifer by clays~tohe and <br />silts tone in the Mesaverde Group to minimize effects. <br />Use of groundwater by wells in the area is tabulated in the State <br />Engineer's records included in Figure 2.04.5-1. All wells in the <br />area are designated as Use Number 1, 2, or 3. Only one well is <br />designated use 2 and two wells are designated as use number 3. <br />The definitions of these use terms and the limitation to which <br />this water may legally be used, include Use 1 - domeatlc use only; <br />Use 2 - livestock; and Use 3 - commerical. <br />• <br />REVISED May 8, 1981 60 <br /> <br />