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permit area with TR51 to 22,443 acres. TC requested to increase the permit area by 80 acres with TR81 <br />for a total permit area of 22,530 acres. Subsequently, with Permit Renewal No. 6 (RN6), the permit area <br />was cited to be 22,450 acres. In the most recent technical revision, TR83, the permit area was cited to be <br />22,450 acres. Please review the permit acreage and permitting history and verb that the permit acreage <br />will be 22,607 acres with the approval of PRIO. <br />Response: - The Permit Area acreage figure has been checked and updated for consistency. Revised copies of the <br />referenced page accompany these responses for replacement in the PAP. <br />11. On revised Map 23; Wolf Creek PRIO Mine Plan Modification map, please depict the affected area <br />boundary taking into account subsidence affects. <br />Response: - Revisions and updates to the accompanying Map 23 WC include delineation of the affected area for the <br />mining activities proposed under PRIO, with consideration of subsidence effects and angle of draw. <br />Rule 2.05.3; Permit Area <br />12. Revised page 2.05.13-lindicates the total affected area will be 13,207 acres. When adding up all of the <br />affected areas listed on this page and including the projected 114 acres to be affected as a result of mining <br />in the WCR, the Division calculated the affected area to be 13,814 acres. Please review and verb the <br />affected area acreage. Please be sure to not double count affected acres for underground workings that <br />will be under currently affected workings. Also, please account for surface affected acres that do not <br />overlie current or projected underground workings. <br />Response: - The affected area acreage figure has been checked and updated for consistency. Revised copies of the <br />referenced page accompany these responses for replacement in the PAP. <br />Rule 2.05.6 — Mitigation of Impacts of Mining Operations <br />13. Proposed revised page 2.05-139 indicates that mining of the WCR will require dewatering of two existing <br />mine water pools in the overlying sealed mine working in the Wadge Seam. At this time, a plan to dewater <br />the two mine pools has not been submitted to the Division. Further, will the existing mine water handling <br />system and storage areas be able to handle the additional water pumped from the WCR workings in order <br />to mine in the panels currently proposed to be mined in the WCR with PRIO that are not under the two <br />mine pools? If so, please demonstrate this. If not, please provide an update water handling plan to <br />accommodate the additional water. <br />Response: - The activities proposed under PRIO will not require and can safely be conducted without dewatering <br />of the mine water accumulations in the sealed and abandoned Wadge Seam workings (refer to response to <br />Comment 5). TC may initiate limited dewatering early, which would involve an underground borehole into the <br />Northern area of accumulated water, with limited drainage of water to TC's existing mine water handling system. <br />TC is also currently working with a consultant to complete a feasibility evaluation and develop detailed plans for <br />full-scale dewatering and treatment and discharge of water from these areas. Limited mine inflows are anticipated <br />in the mining areas covered by the PRIO application, based on TC's experience in mining the overlying Wadge <br />Seam. These limited mine inflows would be balanced with limited early dewatering, relative to the volume which <br />can be readily handled by the existing mine water collection, handling, and recycle systems, with little or no change <br />in the general operation of these systems. <br />14. Page 2.05-181.10 appears to be missing several paragraphs under the Railroad section that began on page <br />2.05-181.9. Please submit revised pages to include the information that has been deleted. <br />Response: - The referenced page has been reviewed and revised to address the omission and assure continuity of <br />the text description. Revised copies of the referenced page and associated text pages accompany these responses <br />for replacement in the PAP. <br />