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Whirlwind Mine Groundwater Characterization Report <br /> surface while penetrating these strata. At a depth of 80 ft, the hole was allowed to set for <br /> 5 minutes followed by air injection which produced between 10 to 50 gallons of water on the <br /> surface. This process was repeated with the same result. Drilling proceeded to a depth of 102 ft <br /> and the hole was allowed to set again followed by air injection. A similar volume of water was <br /> produced at the surface. The well was drilled to a total depth of 120 ft to increase the overall <br /> screen length for the well. Water was injected beginning at the 102-foot depth to facilitate <br /> cutting removal and conditioning of the borehole. A static water level of 73.5 ft below top of <br /> casing (BTOC)was measured. The lithology from 70 to 75 ft was described as a gray-green <br /> shale and mudstone and the intervals above and below this zone were described as very fine- <br /> grained mudstone to siltstone (above), and shale—siltstone (below). Some sand grains were <br /> observed but may have been slough from uphole. Sandstone with mudstone was described as <br /> present at depths of 20 to 45 ft. <br /> During well completion, bridging problems resulted in an interval from approximately 47 to 64 ft <br /> BTOC that may not have an adequate sand pack. However, this interval was above <br /> encountered groundwater in the well. The upper portion of the well was completed using <br /> bentonite pellets and bentonite grout. The well was initially developed using air lifting methods <br /> following by pumping. The well was consistently producing 1 to 2 gpm. <br /> Monitoring Well W-1 is one of several hydrology monitoring stations in a network of stations <br /> monitored annually for the Whirlwind Mine project.; the well has been sampled a total 20 times <br /> since 2008. Annual water levels and water quality sampling results from the well are presented <br /> in annual reports to DRMS. <br /> The elevation of the W-1 monitoring well (ground surface) is 7042.53 AMSL. The approximate <br /> groundwater elevation is 6969.03 ft AMSL. <br /> 4.2.1.8 Other Wells <br /> Dolores Point Well <br /> The Dolores Point Well is the property of the BLM and is located on Beaver Mesa approximately <br /> one mile west of the Whirlwind Portal in Utah and is completed in the Burro Canyon Formation. <br /> The well was drilled and completed in 1981 to support livestock watering. The well contains an <br /> Western Water& Land, Inc. 22 <br />