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West Elk Mine 2009 Annual Hydrology Report 20 <br />3.1.5.2.3 MCSG-3 Temperature Data Logger <br />The MCSG-3 temperature data logger monitoring site is located on the main stem of <br />Sylvester Gulch, 33 feet upstream from its confluence with the unnamed tributary (Figure 8). <br />3.1.5.2.4 MCSG-4 Temperature Data Logger <br />The MCSG-4 temperature data logger monitoring site is located in Sylvester Gulch, <br />approximately 150 feet downstream of its confluence with the unnamed tributary (Figure 8). <br />3.1.5.2.5 MCSG-5 Temperature Data Logger <br />The MCSG-5 temperature data logger monitoring site is located in Sylvester Gulch, <br />approximately 250 feet upstream of its confluence with the North Fork of the Gunnison River <br />(Figure 8). <br />3.2 Spring and Seep Monitoring Program <br />Currently, there are 36 springs and seeps in MCC's hydrologic monitoring program (Table <br />5). The spring and seep monitoring plan is divided into four general hydrologic categories for <br />discussion purposes: <br />• Springs and seeps in the North Fork drainage basin issuing from the strata above the F- <br />coal seam. <br />• • Springs and seeps in the North Fork drainage basin issuing from strata in or below the <br />F-coal seam. <br />• Springs and seeps in the Jumbo Mountain area in the North Fork drainage issuing from <br />strata above the B-coal seam. <br />• Springs and seeps in the Dry Fork drainage issuing from strata above the E-coal seam. <br />The locations of the spring and seep monitoring stations are shown on Map 2. The <br />following discussion of monitored springs is presented according to the general hydrologic <br />categories described above and is presented from upstream to downstream relative to the mining <br />area. A summary of the spring and seep monitoring program details is presented in Table 5. <br />June 2010 HydroGeo, Inc.