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monitoring schedule. These stations are located along Fish Creek in Sections 5 and 17, TSN, R86W. In addition <br />to the hydrologic monitoring program, TCC initiated a focused monitoring program for the segment of Fish Creek <br />to be impacted by mining in the NMD. This environmental program is presented in Exhibit 4e-8, NMD — Fish <br />Creek AVF Monitoring Program. The program includes the following components: hydrologic monitoring, <br />vegetation monitoring, and subsidence surveying. <br />TCC has constructed the 6MN Mine Water Storage Reservoir near the Fish Creek AVF, and completed the <br />associated mine water supply pipeline across the AVF area and under the Fish Creek channel. Specific Best <br />Management Practices (BMP's) were utilized during construction of both the Reservoir and pipeline to minimize <br />any potential for impacts to the AVF. Similarly, potential operational impacts are addressed by implementation of <br />design BMP's in the constructed facilities, along with regular inspection and monitoring. Potential infiltration from <br />the Reservoir will be minimized by a designed compacted clay liner with a permeability on the order of 2.0 x 10' <br />cm/in. Mine water quality is generally compatible with applicable effluent limits (refer to information for Fish <br />Creek Borehole discharge), and any minor infiltration will mix with shallow groundwater, and be further diluted <br />before it infiltrates downward or laterally. While there is some potential for water infiltrating from the Reservoir to <br />reach the Fish Creek alluvium, given the considerations noted, any potential impacts would be negligible. <br />Wolf Creels Reserve (WC-4RT through 9RT, PR14-10, PR15-11) <br />TC's planned development and mining operations in the Wolf Creek Reserve will result in subsidence of portions <br />of Fish Geek, Foidel Creek, and any associated Alluvial Valley Floor (AVF) areas. TC owns or controls through <br />lease the surface of the potentially affected areas, and operates a managed grazing operation through a grazing <br />agreement on these lands. Potential subsidence impacts relative to these lands and the associated grazing <br />operations are identified and described in the following sections. <br />The areas that TC will undermine and subside in the Fish Creek and Foidel Creek drainages are summarized as <br />follows: <br />Foidel Creek — A short segment extending diagonally across Panel WC-4RT and over the gateroads at the <br />eastern end of Panel WC-5RT (Sections 13 and 14, TSN, R86W) <br />Fish Creek — A portion of Fish Creek extending from the western edge of Panel WC-7RT into and along <br />the west half of Panel WC-6RT, then turning northeast and cutting across Panels WC-7RT through 9RT on <br />a diagonal line (refer to Map WC23, Sections 10, 11, 15, 16, and 17, TSN, R86W) <br />The portion of Fish Creek to be affected in Sections 10 and 11 of TSN, R86W is identical to the area that P&M <br />Coal Company was planning on undermining and subsiding in its proposed Fish Creek Mine. P&M contracted <br />with the consulting firm of Kaman Tempo to prepare a report responding to the requirements of Rule 2.06.8(4). <br />This report has been incorporated into Exhibit 4e-2. The soils information presented in the Kaman Tempo report <br />was updated with the work performed by Habitat Management, Inc., and a copy of their report is presented in <br />Exhibit 4e-4. Additionally, chemical and physical properties of the Binco Silty/Clay Loam are presented in Table <br />73. None of the data presented indicates a problem with this soil, for example the low SAR's indicate that leaching <br />will not be problematic downstream of the mined area. The original data presented on this table was taken from <br />Table 72 of Permit C 81-071. The conclusions presented in the report indicate that subsidence of the AVF will not <br />materially damage or otherwise adversely impact grazing operations which may utilize the AVF areas. It should be <br />noted that the Kaman Tempo report was prepared in 1982 and since that time grazing management practices have <br />not changed significantly, i.e. large acreage grazing utilization to meet the economic requirements of the <br />marketplace. This agricultural management pattern continues in the Twentymile Park basin. The ownership and <br />land use patterns generally remain as shown on Maps 1, Surface Ownership and Maps 3 and 3a, Pre -Mining Land <br />Use. <br />PR 14-10 2.06-25.7 03/18/16 <br />