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• ~:. , Mr. Larry Reschke -5- January 13, 1982 amendments will have to be reflected within the amended permit application. Furthermore, the implications of possible roof fall and subsidence upon the hydrologic balance of the Ward Creek alluvial aquifer will have to be specifically discussed within that amended application. The applicant has made a few minor amendments to the hydrology and operation plan portions of the permit document, the specific problems mentioned above were not discussed. This discussion should include the results of additional coring performed, and potential impacts of the amended plan upon subsidence and the hydrologic balance of the Ward Creek aquifer. The absence of this discussion is a critical deficiency. 2) Lack of "D" and "E" Seam Mine Plan Details The preparation of mine plan maps for the proposed "D" seam workings was requested in the Preliminary Adequacy Review letter. None have been included within the amended application materials. On page I59, the applicant states: "Safety zones for 'D' seam will be forwarded when mining begins in that seam." The only indication of a mine plan for the "D" seam is contained as a general projection of estimated scheduling by area on Map 2.05.3(1)-3. without a detailed plan for the proposed "D" seam workings and an accompanying map, approval of. the "D" seam (Red Canyon No. 2 mine) will not be possible. The "D" seam map should also indicate the proposed safety zones, in which extraction is to be limited to SO o, proposed for mining within the "D" seam. In addition, the mine plan map for the proposed workings within the "E" coal seam (Red Canyon No. 1 mine) should be amended to specifically show the proposed workings within the west Half of the southeast quarter of Section.2. This would greatly assist in clarifying the text descriptions on pages 78-80 of the original application. This amendment would be particularly helpful in clarifying the mine plan changes referred to on page 81 of the amended application, which resulted from the unstable roof conditions encountered while mining west in the No. 1 west submains of the existing Red Canyon No. I mine. (See above description.) 3) Discrepencies Between the Subsidence Text and Subsidence Control Map The amended application text refers to items purportedly indicated on the "Subsidence Control Map", Map No. 2.05.6(f)(ii)(C)-I. On page 153, the applicant states that the "areas of influence" beneath each structure have been indicated on that map. They have not. The map should be properly redrafted to include their indication. Furthermore, on page 159A of the amended application, the application indicates that the location of subsidence monuments is indicated on that map. They, also, have been overlooked. This map should be properly amended so that the Division can complete the review of the proposed monitoring plan.