2018-09-04_PERMIT FILE - C1980007 (18)

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I „ MCC West Elk Mine Sunset Trail Lease Modifications 2011 Hydrology Survey 5 "Significant" spring, seep, and pond features are indicated on Figure 2 by symbols with a bright red border. Significant features in this report are defined as springs having flows greater than 2 gallons per minute (gpm) and/or sites that were 0.3 acres or greater in areal extent. Areas with hydrophytic vegetation and/or wetland areas that do not have spring or seep flows at the time of the survey were located and noted, but were not mapped as springs or seeps. The GPS location, brief description, estimated size, and photographs of wetland areas encountered during the surveys were noted in the field book. However, specific wetland delineations were beyond the scope of work for this survey. The data collected at each site and accompanying photographs are presented in the Site Summary sheets (see Appendices). 3.0 MAJOR DRAINAGES IN SUNSET TRAIL LEASE MODIFICATIONS (STLM) SURVEY AREA There are four major drainages in the STLM study area: Lick Creek, North Prong Creek, South Prong Creek, and Horse Creek. 3.1 Lick Creek Drainage The Lick Creek drainage encompasses an area of about 2.32 square miles (1,483 acres) and includes the main fork of Lick Creek and a northern fork. The drainage ranges from approximately 10,800 to 7,200 feet above mean sea level (amsl) and has an overall average gradient of 774 feet per mile. Approximately 0.64 square miles (-411 acres) of the Lick Creek drainage lies in the STLM study area (Figure 2). Portions of the upper main fork of Lick Creek were flowing at the time of the surveys. Data collected at the various survey sites in the STLM study area in the Lick Creek drainage are summarized in Table 1. Twenty-two sites were identified in this area during the survey (Figure 2) including 10 springs or spring complexes with ponds and wetlands, 10 ponds, 1 wetland without spring or pond features, and 1 flowing stream reach. The site summary sheets and photos for the Lick Creek drainage are presented in Appendix A. 3.1.1 Springs and Seeps The locations of the seep and spring related survey sites are depicted on Figure 2. The elevations for the ten springs or springs with ponds and/or wetlands mapped in the Lick Creek drainage ranged from 8,291 to 9,646 feet amsl. Average spring flows ranged from no measurable flow (seep) to 2-3 gallons per minute (gpm). Three of the ten springs, sites 33, 39 and 41, had flows greater than 2 gpm and/or were > 0.3 acres in size. The field pH at all sites was near neutral, ranging from 6.69 to 7.52 s.u., electrical conductivity ranged from 102.5 to 392 µS/cm; and temperatures ranged from 4.4 to 17.1 ° C (Table 1). February 2012 HydroGeo, Inc.