2018-05-30_PERMIT FILE - C1981022A

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Section - 2.05.6 trends and fluctuations in the quantity and quality of surface water, the level and quality of ground water, and the overall effects of mining and reclamation activities on the hydrologic balance. Water quality parameters include field measurements for pH, specific conductance, and temperature and laboratory measurements for general water quality characteristics such as TSS, TDS, major ions, and selected trace metals. Both surface and ground water quality samples are collected, labeled and transported to a qualified analytical laboratory for analyses. Proper sample collection, preservation, handling, and storage methods will be utilized at alt times to preserve the integrity of the samples and assure the validity of the analytical results. The monitoring data and resulting evaluations axe used to identify any potential problems and develop any necessary supplemental mitigation measures in a timely manner. The baseline hydrologic information presented in Section 2.04.7, Hydrologic Description, of this permit application includes identification of surface drainages and general flow chaxacteri;dcs; information on corresponding peak flows and annual runoff volumes; identification of ground water aquifers; and a general description of aquifer characteristics including ground water levels, movements, and recharge/discharge/storage characteristics. The baseline hydrologic information forms the basis and serves as a reference for the ongoing hydrologic monitoring program. The operational monitoring network consists of 2 spring/seep locations, 7 ground water wells, 1 mine water discharge, and 12 stream locations summarized as follows: Site Designation Site Description Springs/Sees SP-8 Oliver Spring SP-9 Lower Spring Ground Water Wells Well SC-1 Rollins SS -Sanborn Creek Well SC-3 D-Seam -Sanborn Creek Well B-6 B-Seam -Upper Beax Creek Well BC-1 Alluvium/Colluvium -Bear Creek Well H-10 B-Seam -Upper Hubbard Creek Well EC-14 Alluvium/Colluvium -Elk Creek Well EC-15 Alluvium/Colluvium -Elk Creek Mine Water Dischazee Outfall 015 Elk Creek Mine Discharge SF:e~ms S1FeC-1 Coal Guleh Site HN-1 Lower Hawks Nest Creek Site S-1 Upper Sanborn Creek Site E-1 Lower Elk Creek Site E-2 Upper Elk Creek Site B-1 Lower Bear Creek Site B-2 Mid Bear Creek y}~ Site B-3 Upper Bear Creek Site FI-1 Lower Hubbard Creek Site NF-1 North Fork above Sanborn Creek Site NF-3 North Fork at Fire Mountain Headgate USGS Gage North Fork upstream of Somerset The spring/seep locations and monitoring wells are used to evaluate the occurrence of ground water, hydraulic characteristics of ground water aquifers, and fluctuations in the elevadoa and quahty of ground water. The surface water monitoring sites are used to evaluate fluctuations in the quality and quantity of surface water. The locations of the monitoring stations are shown on the Ground Water and Surface Water Hydrology Maps, (Maps 2.04-MS and 2.04-M6). Tables 2.04.7-T2, Ground Water Monitoring Summary, and 2.04.7-T5, Surface Water Monitoring Summaty, summarize the type and location of historic and existing monitoring sites.