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Exhibit 7 <br /> Hydrology Information <br /> Volume 2B <br /> 1) Ground Water Quality Colowyo Coal Mine, Leonard Rice Consulting Water Engineers, <br /> Inc., 1979 <br /> 6) Hydrologic and Erosional Characteristics of Regraded Surface Coal Mined Land in <br /> Colorado, Striffler and Rhodes, 1981 <br /> 7) Modification of both Surface Water Monitoring and Alluvial Groundwater Monitoring <br /> Locations, 1991 <br /> 8) Geotechnical Assessment East Taylor Pond, CTL/Thompson, Inc. 1995 <br /> 9) Haulroad Culvert Redesign, 1997 <br /> 10) Stoker Crusher Ditch, 1997 <br /> 12) Section 16 Taylor Ditch, 1997 <br /> 14) Lower Administration Building Small Area Exemption <br /> 15) Haul Road A Upper and Lower Ditches <br /> Volume 2C <br /> 14) Emergency Spillway, Temporary and Permanent Channel Designs, Existing Structures <br /> Summary Text <br /> Appendix Exh7-14A Emergency Spillway Outslope Channel Designs <br /> Appendix Exh7-14B Side Channel Designs (Temporary) <br /> Appendix Exh7-14C Taylor Tributary Ditch Channel Designs (Permanent) <br /> Appendix Exh7-14D Section 16 Fill Ditch (Permanent) <br /> Appendix Exh7-14E Streeter Gulch and Buckskin Draw Ditches (Permanent) <br /> Appendix Exh7-14F West Pit Fill Ditch& East Taylor Pond Ditch Channel Designs <br /> (Permanent) <br /> Appendix Exh7-14I East Taylor Ditch <br /> Appendix Exh7-14L Taylor Ditch <br /> Appendix Exh7-140 Section 16 Pond Ditch Extension, Section 16 Pit <br /> Appendix Exh7-14P Small Area Exemption <br /> Appendix Exh7-14R East Pit Reclamation Area, Prospect Ditch,North Trib East Pit <br /> Ditch, Final East Pit Ditch <br /> 15) Stability Evaluation, Existing Sedimentation Pond Embankments, CTL/Thompson Inc. <br /> 1998 <br /> Exh. 7-14TOC-1 Revision Date: 12/20/19 <br /> Revision No.: TR-135 <br />