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Colowyo Coal Company <br />2013 Annual Reclamation and Hydrology Report <br />• Upper West Fork Good Spring Creek (UWFGSC) is an upstream site, located <br />southwest of the mine along State Highway 13 and is represented on the Surface <br />& Ground Water Sampling Sites Map located in Exhibit 2C. Monitoring has <br />occurred from the 4th quarter of 2007 to 2013. <br />Ground Water Data - Ground water monitoring sites are comprised of two up dip and <br />four down dip shallow alluvial wells and are briefly described below (See Exhibit 2C for <br />location): <br />• A -6 Well (A -6) is located south of the mine along State Highway 13,and this site <br />represents up dip, undisturbed or background conditions. This well is represented <br />on the Surface & Ground Water Sampling Sites Map located in Exhibit 2C. <br />Monitoring has occurred from 1984 to 2013. <br />• A -7 Well (A -7) is an alluvium well located south of the mine along State <br />Highway 13 and represents a potential down dip condition below the South <br />Taylor Pit operations. This well is delineated on the Surface & Ground Water <br />Sampling Sites Map located in Exhibit 2C. Monitoring started in the second <br />quarter of 2008 and has continued through 2013. <br />• A -8 Well (A -8) is an alluvium well located south of the mine, west of State <br />Highway 13, and represents the condition up- gradient of the South Taylor mining <br />activities. This well is shown on the Surface & Ground Water Sampling Sites <br />Map located in Exhibit 2C. Monitoring started in the second quarter of 2008 and <br />has continued through 2013. <br />• North Good Springs Well (NGSW) is an alluvium well located along State <br />Highway 13 and this site represents the downdip condition below mining <br />activities. It is shown on the Surface & Ground Water Sampling Sites Map <br />located in Exhibit 2C. Monitoring has occurred from 1989 to 2013. <br />• Gossard Well is an alluvium well located within the rail loop facility and <br />represents the condition of groundwater associated with the Gossard Loadout <br />Faclity. Access to this well is through Colowyo private property and the well <br />location is shown on the Surface & Ground Water Sampling Sites Map located in <br />Exhibit 2C. Monitoring has occurred from 1983 to 2013. <br />• MT -95 -02 Well is an alluvium well that is located just south of the rail loop <br />facility and represents the down dip condition below current and proposed mining <br />activities. This well is represented on the Surface & Ground Water Sampling <br />Sites Map located in Exhibit 2C. Monitoring started in the first quarter of 2008 <br />and has continued through 2013. <br />Page 2 -2 <br />