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Michael Boulay May 21-2M <br />indicates (apparently erroneously) that "the existing sediment pond, <br />topsoil stockpile, and proposed riprap storage area" are located on the <br />AVF. <br />CAM: Please see revised page 4-6 discussing the new disturbance caused by <br />the Coal Mine Waste Pile and associated facilities. <br />d) Please update the groundwater monitoring paragraph on permit page 4-7 <br />to reflect the TR-16 monitoring plan changes. <br />CAM: Please see revised page 4-7. <br />e) The essential hydrologic function of the undeveloped alluvial valley floor <br />that has been (and will be) disturbed by mining related facilities, is the <br />capability of area to support flood irrigated agricultural activity. Please <br />include a discussion of the measures that will be taken (e.g. restoration of <br />original ground elevation and slopes; replacement of original topsoil <br />thickness, etc.) to reestablish the essential hydrologic function of the AVF <br />within the permit area. <br />CAM: Page 3-8 was updated stating the sediment pond and topsoil stockpile <br />area will be backfilled with 2' of topsoil to replace the original topsoil thickness. <br />Please call if you have any questions. <br />Sincerely, <br />tzl?- <br />J. E. Stover, P.E. <br />Consulting Engineer <br />cc: Denver Office <br />BLM - Grand Junction Office <br />Mesa County Clerk & Recorder <br />Enclosures: <br />Volume I Pages 2-1,23,26,27,27i,27ii,27iii,27iv,29,31,32-35,37- <br />39,41,42,48,3-1,7,8-10,12,15,4-5,6,7,17,79 <br />Volume II Appendix M - pages 12-110, N, P & R <br />Volume III Figures 2.2-1,2.2-2, 2.2-3, 2.2-5A,3.1-1,4.1-2,4.1-7,4.2-2. Tables <br />3.1-1,4.2-12,13 <br />24