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Apache and Blue seams, respectively. The completion groundwater elevation in the Allen seam <br />at NE -1 -10 was 7,045.5 feet on September 13, 2010. The completion groundwater elevation in <br />the Apache seam at NE- 6 -10(a) was 6,773.1 feet on November 15, 2010. The completion <br />groundwater elevation in the Blue seam at NE- 6 -10(b) was 7,033.2 feet on November 16, 2010. <br />Groundwater Usage <br />Domestic wells for area residents are supplied by alluvial sediments and bedrock in the <br />Raton Formation. A few higher -yield production wells are also located near the mine and are <br />used for irrigation. The irrigation wells are completed in the Purgatoire River Alluvium. CBM <br />development activities in the northern portion of the Raton Basin are currently producing <br />groundwater from coal beds in the Raton and Vermejo Formations. Groundwater withdrawal <br />related to CBM production has partially dewatered coal seams in the permit area, but has not <br />impacted water availability in alluvial wells. Similarly, dewatering of the Allen and Apache coal <br />seams for mining is not expected to lower water levels in alluvial wells that are used for <br />domestic supply and irrigation. It may, however, impact deeper bedrock wells that are <br />completed in permeable strata near the Allen and Apache coal seams. A summary of developed <br />groundwater sources for domestic use and irrigation is presented in Table 10. Wells that are <br />located within one mile of the permit boundary (excluding CBM wells) are shown on Map 8. <br />Locations for CBM development wells are shown on Map 20. <br />TR -56 2.04 -19 Revised 2/1/11 <br />