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COLORADO DIVISION OF RECLAMATION, MINING AND SAFETY <br />1313 Sherman Street, Room 215, Denver, Colorado 80203, (303) 866 -3567 <br />COAL MINING PERMIT - TECHNICAL REVISION DECISION <br />Seneca 11-W Mine, Seneca Coal Company, LLC <br />Permit No. C- 1982 -057 <br />The Division of Reclamation, Mining and Safety has proposed the decision stated below. Provided there <br />are no objections, the decision will become effective upon the termination of the ten (10) day public <br />comment period, in accordance with Rule 2.08.4(6)(b)(iii). <br />Technical Revision No. 79 <br />Submittal Date: November 6, 2012 <br />Decision: Approve <br />Decision Date: February 25, 2013 <br />Description of Revision: Remediation activities at the Pond 016A Slide. <br />REVISED INFORMATION <br />APPLICATION PAGES <br />Tabl3: Facilities <br />a. Text— Replace Table 13 -5, Summary of Culvert Design Characteristics <br />b. Attachment 13 -7, Culvert Calculations – Replace Table 13 -7 -1, Summary of Watershed Parameters and <br />Design Statistics for Culverts <br />c. Attachment 13 -7, Culvert Calculations – insert SEDCAD run for Culverts PM -18 at the end of <br />Attachment 13 -7, (replace page 13 -7 -274, add 13 -7 -275 to 13 -7 -279) <br />d. Maps: <br />a. Exhibit 13 -2, Surface Hydrology – replace exhibit <br />Tab 20; Backfilling and Grading <br />a. Table of Contents – Replace <br />b. Text – Page 18, 19, 20 – replace with Page 18 and 19 (remove Figure 20 -2 from text) <br />c. Text – remove Figure 20 -2, Typical Runoff Control Structure <br />d. Attachment 20 -D –insert Pond 016 Slide Area Construction Summary at the front of the Attachment. <br />e. Attachment 20-3, Figure 20 -2 – Replace this figure. <br />a. Maps: <br />i. Exhibit 20 -2, Postmining Topography and Drainage – Replace Exhibit <br />ii. Exhibit 20-3, Postmine Road Profiles (2 Sheets), Add <br />in. Exhibit No. 20 -D.2A, Add <br />DELETED ITEMS <br />N/A <br />