2012-07-02_REPORT - C1980007 (3)

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West Elk Mine 2011 Annual Hydrology Report 28 3.2.1.5 Spring 27 -1 Spring 27 -1 is located in upper Sylvester Gulch, which is tributary to the North Fork of the Gunnison River, (Map 2) and feeds an area known as "twin ponds ". This spring issues from alluvial sediments and is located above the south side of B -seam longwall panel 15 (Box Canyon B -seam longwall panel area). Hydrologic monitoring measurements from this station are taken at the end of a plastic drain pipe. Monitoring at this spring began in 1996. 3.2.1.6 Spring G -7 Spring G -7 is located in a western tributary of Sylvester Gulch and is situated south of the Northeast B -seam longwall panel area and north of the Southeast B -seam panel area (Map 2). This spring issues from joints in a sandstone ledge and has perennial flow, but shows strong seasonal variations with high flows in the spring months. Monitoring at this spring began in 1977. 3.2.1.7 Spring G -16 Spring G -16 is located in Sylvester Gulch east of the Northeast longwall panel area (Map 2). This spring issues from a sandstone bed above the F -seam and flows seasonally. It is typically dry in the late summer and fall. Monitoring at this spring began in 1979. 3.2.1.8 Spring G -24 (Decreed Spring #8) Spring G -24 is located in Sylvester Gulch east of the Northeast B -seam longwall panel area (Map 2). This spring issues from alluvium and is measured at the outflow of a plastic drainage pipe. It flows seasonally and flow diminishes in late summer and autumn. Monitoring at this spring began in 1979. 3.2.1.9 Spring G -14 (Decreed Spring #7) Spring G -14 is located in Sylvester Gulch east of the Northeast B -seam longwall panel area (Map 2). This spring issues from fractures in the base of a sandstone bed. It flows seasonally and flow diminishes in late summer and autumn. Monitoring at this spring began in 1977. June 2012 HydroGeo, Inc.