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Coal Canyon (aka Coal Creek Canyon and Coal Creek) is located to the north and west of the <br />permit area (see Map 2.04.5-1). In the upper reaches it is dry except during periods of snow melt <br />run off and heavy precipitation events. Immediately north of the terminus of the 2nd Park Lateral, <br />aerial photos (Google Earth) show that water flow begins in the stream bottom and continues to <br />the San Miguel River during the summer months as the result of return irrigation water. The stream <br />gradient, measured from the confluence of the lower Meehan Draw (elev. 5440 msl) to the San <br />Miguel River (elev. 5120 ft msl) is about 99 ft per mile. The Coal Canyon stream bottom is isolated <br />and public access to the canyon bottom is very limited. Two new stream sampling sites have been <br />recently monitored and sampled to provide some evidence of <br />the quality and quantity of the water in Coal Canyon. The two sites are referred to as South Coal <br />Canyon (SCC) and North Coal Canyon (NCC). These two sites are shown on Map 2.04.5-1. SCC <br />is located about half a mile north of the confluence with the San Miguel River and NCC is located <br />where Z26 Road crossed Coal Canyon. These two sites were monitored on 3/11/2011 and the <br />results (sample analyses and physical properties) have been added to Appendix 2.04.7-2 of this <br />application. The results show that NCC had a flow of 0.06 ft3/sec (about 27 gpm) and a TDS <br />(calculated) of 2640 mg/l. At SCC, the flow was 1.296 ft3/sec (about 582 gpm) and the TDS <br />(calculated) was 2940 mg/l. <br />The New Horizon 1 Permit contains historic flow and water quality data that was collected from <br />four additional sites in the immediate permit area. Two of these sites on Nygren Draw, SW -N6 <br />and SW -N7 monitor Nygren Draw. Two sites in Tuttle, one upstream of NH 1 Mine and one <br />downstream from the old Peabody Mine, provide information for Tuttle Draw. The two sites were <br />monitored during 1986 and 1987 following the cessation of mining but prior to NH 1 reclamation, <br />(see Map 2.04.7-1 for location). Data is also available for 2 sites in Tuttle Draw, SW -N1 and SW - <br />N3, (see Maps 2.04.5-1 and 2.04.7-1, respectively, for locations). These two sites are currently <br />included in the New Horizon 2 Hydrological Monitoring Program and this data is presented as <br />baseline data for New Horizon North. The monitoring data for these 4 sites is included in <br />Appendix 2.04.7-2 of this application. SW -N213 and SW -N214 (formerly SW -N6 and SW -N7) <br />on Nygren Draw resumed monitoring in 2011. <br />Surface Water Flow The average annual precipitation in the NHN permit area (Uravan Site, 1960- <br />2009) is 12.5 inches per year (see Section 2.04.8 of this permit application). The permit area is <br />semi -arid. Surface flow at NHN is dependent on irrigation water from the 2nd Park Lateral ditch <br />system. Map 2.04.7-1 shows the location of the surface water monitoring sites and the location of <br />the 2nd Park Lateral. Monthly monitoring of the surface water flow began on October 17, 2008 <br />when flows occurred at the nine new surface water monitoring stations and will continue on that <br />schedule for the foreseeable future. The irrigation season (ditch flowing) during this current period <br />of monitoring ended on 10/5/2008, began again on 4/23/09 and ended on 10/5/09. Two ditch runs <br />(6 days to 8 days) were conducted (one in November and one in March) during the off season to <br />Section 2.04.7 Page 22 Sept. 2015 (TR -11) <br />