2012-07-02_REPORT - C1980007 (3)

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West Elk Mine 2011 Annual Hydrology Report 24 3.1.5.2.3 MCSG -3 Temperature Data Logger The MCSG -3 temperature data logger monitoring site is located on the main stem of Sylvester Gulch, 33 feet upstream from its confluence with the unnamed tributary (Figure 8). 3.1.5.2.4 MCSG -4 Temperature Data Logger The MCSG -4 temperature data logger monitoring site is located in Sylvester Gulch, approximately 150 feet downstream of its confluence with the unnamed tributary (Figure 8). 3.1.5.2.5 MCSG -5 Temperature Data Logger The MCSG -5 temperature data logger monitoring site is located in Sylvester Gulch, approximately 500 feet upstream of its confluence with the North Fork of the Gunnison River (Figure 8). 3.2 Spring and Seep Monitoring Program Currently, there are 36 springs and seeps in the MCC hydrologic monitoring program (Table 5). This number does not include spring E14 -1 which was abandoned in 2006 when it was covered by drill -pad construction activities. The spring and seep monitoring plan is divided into four general hydrologic categories for discussion purposes: • Springs and seeps in the North Fork drainage basin issuing from the strata above the F -coal seam. • Springs and seeps in the North Fork drainage basin issuing from strata in or below the F -coal seam. • Springs and seeps in the Jumbo Mountain area in the North Fork drainage issuing from strata above the B -coal seam. • Springs and seeps in the Dry Fork drainage issuing from strata above the E- coal seam. The locations of the spring and seep monitoring stations are shown on Map 2. The following discussion of monitored springs is presented according to the general hydrologic categories described above and is presented from upstream to downstream relative to the mining area. A summary of the spring and seep monitoring program details is presented in Table 5. June 2012 HydroGeo, Inc.