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show that water flow begins in the stream bottom and continues to the San Miguel River during <br />the summer months as the result of return irrigation water. The stream gradient, measured from <br />the confluence of the lower Meehan Draw (elev. 5,440 msl) to the San Miguel River (elev. 5,120 <br />ft. msl) is about 99 ft. per mile. The Coal Canyon stream bottom is isolated and public access to <br />the canyon bottom is very limited. Two new stream sampling sites have been recently monitored <br />and sampled to provide some evidence of the quality and quantity of the water in Coal Canyon. <br />The two sites are referred to as South Coal Canyon (SCC) and North Coal Canyon (NCC). These <br />two sites are shown on Map 2.04.5-1. SCC is located about half a mile north of the confluence <br />with the San Miguel River and NCC is located where Z26 Road crossed Coal Canyon. These two <br />sites were monitored on 3/11/2011 and the results (sample analyses and physical properties) have <br />been added to Appendix 2.04.7-2 of this application. The results show that NCC had a flow of <br />0.06 ft3/sec (about 27 gpm) and a TDS (calculated) of 2640 mg/l. At SCC, the flow was 1.296 <br />ft3/sec (about 582 gpm) and the TDS (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 <br />were monitored during 1986 and 1987 following the cessation of mining but prior to NH 1 <br />reclamation, (see Map 2.04.7-1 for location). Data is also available for 2 sites in Tuttle Draw, <br />SW -N1 and SW -N3, (see Map 2.04.7-1 for locations). These two sites are currently included in <br />the New Horizon 2 Hydrological Monitoring Program and this data is presented as baseline data <br />for New Horizon North. The monitoring data for these 4 sites is included in Appendix 2.04.7-2 <br />of this application. SW -N213 and SW -N214 (formerly SW -N6 and SW -N7) on Nygren Draw <br />resumed monitoring in 2011. <br />Surface Water Flow The average annual precipitation in the NHN permit area (Uravan Site, <br />1960-2009) is 12.5 inches per year (see Section 2.04.8). The permit area is semi -arid. Surface <br />flow at NHN is dependent on irrigation water from the 2nd Park Lateral ditch system. Map <br />2.04.7-1 shows the location of the surface water monitoring sites and the location of the 2nd Park <br />Lateral. Monthly monitoring of the surface water flow began on October 17, 2008 when flows <br />occurred at the twelve surface water monitoring stations and will continue on that schedule for <br />the foreseeable future. The irrigation season (ditch flowing) during this current period of <br />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 />fill cisterns and stock -ponds. The Colorado Cooperative Company records show that during 2009 <br />that 19.20 cfs was delivered to the lower end of the ditch. About 10.5 cfs of the total flow was <br />diverted above the NHN permit area leaving about 8.7 cfs to flow into the NHN permit area in <br />the lower 2nd Park Lateral. The flow data and hydrographs of flow from the surface water <br />monitoring sites are contained in Appendix 2.04.7-2. The results of the new monitoring are <br />Section 2.04.7 Page 21 April 2016 (PR -01) <br />