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mining activities will result in mining and potential surface subsidence effects which extend beyond the eastern limits
<br /> of the previously surveyed and mined areas. TC has contracted with Metcalf Archaeological Consultants, Inc. to
<br /> complete intensive Class III cultural resources surveys for any areas subject to potential surface subsidence effects,
<br /> which have not already been surveyed. Generally, these surveys covered limited additional areas in Sections 10,
<br /> 12, 13, and 14, T5N, R86W. The surveys resulted in identification of two new sites and one previously recorded
<br /> site which could potentially be affected by mining-related subsidence. Metcalf Archaeological Consultants, Inc.
<br /> reviewed the subsidence evaluations and profiles for the areas associated with the identified sites, and provided a
<br /> letter concluding that based on the very limited projected changes in ground elevation and gradient, the potential to
<br /> impact any buried cultural materials would be negligible. Review by both the CDRMS and SHPO resulted in
<br /> concurrence with this conclusion. Survey results are presented in the Confidential Appendix, in Exhibit 6L.
<br /> 13LT Outby Utility Borehole (MR15-291, MR292) -_TC contracted with Metcalf Archaeological Consultants,
<br /> Inc. to complete intensive Class III cultural resources surveys of the proposed 13LT Outby Utility Borehole. The
<br /> surveys covered lands located in Section 20, T5N, R86W. Due to adverse ground conditions, the cultural resource
<br /> survey for the 13LT Outby Utility Borehole was conducted as an auger survey under study plans reviewed and
<br /> approved by the SHPO. The approved study plan involved augering to a depth of approximately 1.0m on a 15m
<br /> grid for the pad area, and on two parallel lines spaced 15m apart along the access corridor. This effectively resulted
<br /> in a 30m wide inventory area for the access, and a 135m x 135m inventory area for the pad disturbance. The field
<br /> archaeology crew looked for staining and artifacts during the augering, screened the excavated material, and
<br /> prepare detailed field notes on stratigraphy, soil character, and any artifacts found. The 13LT Outby Borehole
<br /> Study Plan is presented in the Confidential Appendix, in Exhibit 6T. The field work did not identify any cultural
<br /> resources and resulted in a finding of no adverse effect, based on the preliminary survey report. Both the
<br /> preliminary and final survey reports are provided for reference in Exhibit 6T.
<br /> 9-East Utility Borehole Installation (MR16-296) — In conjunction with permitting for the Wolf Creek Reserve
<br /> development and mining(PR15-11) Metcalf Archaeological Consultants, Inc. completed intensive Class III cultural
<br /> resources surveys for any areas subject to potential surface subsidence effects, which have not already been
<br /> surveyed, as well as any related areas of additional surface disturbance, including utility boreholes. Generally,
<br /> these surveys covered limited additional areas in Sections 10, 11, 12, 13, and 14, T5N, R86W. The proposed utility
<br /> borehole pad areas (Options 1-2) and roads would not impact any identified cultural resource sites. Survey results
<br /> are presented in the Confidential Appendix, in Exhibit 6L.
<br /> WMD and SWMD Thickener Underflow Boreholes and Pipelines (TR16-86, TR17-88, TR18-90) - TC
<br /> contracted with Metcalf Archaeological Consultants, Inc. to complete intensive Class III cultural resources surveys
<br /> of the proposed WMD and SWMD thickener underflow boreholes and pipelines. The surveys covered the pad
<br /> areas, any road areas, and some of the pipeline corridors located in Sections 30, 31, and 32, T5N, R86W and
<br /> Sections 23, 25, 26, and 36, T5N, R87W. Portions of the pipeline corridors were not surveyed as they are located
<br /> entirely within the RCR27 disturbed right-of-way. The proposed thickener underflow borehole pad areas and
<br /> associated pipeline disturbances would not impact any identified cultural resource sites. Survey results are
<br /> presented in the Confidential Appendix, in Exhibit 6L.
<br /> RULE 2.04.5-GENERAL DESCRIPTION OF HYDROLOGY AND GEOLOGY
<br /> Each application shall contain a description and map, prepared in accordance with 2.10, of the geology, surface and
<br /> ground water systems, including water quality and quantity, of all lands within the proposed permit area, the
<br /> adjacent area, and the general area. The description shall include information on the characteristics of all surface
<br /> and ground waters within the general area, and any water which will flow into or receive discharges of water from
<br /> the general area. The description shall be prepared according to 2.04.5 and 2.04.7, and conform to the following:
<br /> (a) Information on surface and groundwater systems including water quality,water quantity, and
<br /> geology related to the hydrology of areas outside the permit area and within the general area shall be provided by the
<br /> Division,to the extent that this data is available from an appropriate Federal or State agency.
<br /> (b) If this information is not available from those agencies, the applicant may gather and submit
<br /> this information to the Division as part of the permit application.
<br /> TR 18-90 2.04-9.2 04/05/18
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