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.• <br />~w~/~Is~f68 ~+P~ItD~® <br />A D I V I S I O N O F K AMA N S C I E N C E S C O R P O R A 7 1 0 N <br />DENVER OFFICE <br />Suite 310, Cherry Creek Plaza 11 <br />650 South Cherry St. <br />Denver, Colorado 80222 <br />April 6, 1982 <br />Mr. William Tate <br />Senior Engineer <br />Western Associated <br />410 - 17th Street, <br />Denver, CO 80202 <br />Coal Corporation <br />Suite 2300 <br />SUBJ: Detailed Study Plan - Phase II <br />Dear Bill: <br />Enclosed please find a detailed study plan for Phase II of the hydrology <br />evaluations for Grand Mesa Coal Company's Red Canyon Mine. The study plan <br />adheres to the following outline: <br />Task I Ground Water Baseline Study <br />Task II Surface Water Baseline Study <br />Task III: Alluvial Valley Floor (AVF) Evaluations <br />Task IV Impact Analyses <br />A. Ground Water Inflow <br />B. Ground Water Drawdown <br />C. Post-Mining Ground Water Conditions <br />D. Surface Water <br />E. AVFs <br />Appendix A: Mine Inflow Monitoring Program <br />Appendix B: Reconnaissance Site Visit - Subirrigation Evaluations <br />Task I, II, and III represent field investigations while Task IV includes office- <br />type analyses. The appendices have been included to provide recommendations on <br />a mine inflow monitoring program and to advise against proceeding with test pits <br />at this time to study subirrigation. <br />We have also developed a proposed schedule to carry out the field activities and <br />analyses noted above. <br />