2025-05-05_PERMIT FILE - C1981010 ‎(32)‎

• Permit No: C1981010
• IBM Index Class Name: Permit File
• Doc Date: 5/5/2025
• Doc Name: Inwall HWM Sequence Analysis
• Section_Exhibit Name: Appendix X-II 534-61
• Media Type: D
• Archive: No

Tonia Perkins
July 31, 2024
Page 6
Agapito Associates, Inc.
Figure 2(c). Recovery Estimates for the M Seam in N-Pit
Design
Depth of Cover, ft 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8
80 82.2 81.1 80.0 78.7 76.5 74.5 73.0 71.2 69.5 67.9 66.3 65.1 63.7
95 80.8 79.3 78.1 77.1 75.8 73.8 72.2 70.4 68.7 67.1 65.6 64.4 63.0
110 78.6 77.0 76.0 74.9 74.0 73.0 71.5 69.7 68.0 66.3 64.8 63.6 62.2
125 76.9 75.3 73.9 72.5 71.5 70.6 69.8 68.9 67.2 65.6 64.1 62.9 61.5
140 75.5 73.3 71.9 70.5 69.3 68.4 67.5 66.7 65.9 64.9 63.3 62.1 60.8
155 74.3 72.1 70.0 68.7 67.4 66.3 65.4 64.4 63.6 62.8 62.1 61.4 60.0
170 72.9 70.7 68.7 67.0 65.4 64.2 63.2 62.4 61.4 60.7 60.0 59.3 58.7
185 71.4 69.3 67.7 65.8 64.0 62.6 61.3 60.3 59.6 58.7 58.0 57.1 56.5
200 70.1 68.0 66.1 64.6 62.9 61.3 59.9 58.6 57.7 56.8 55.9 55.3 54.5
215 69.0 66.7 64.9 63.1 61.7 60.1 58.7 57.3 56.1 55.0 54.2 53.4 52.8
230 67.8 65.5 63.4 61.7 60.1 58.9 57.6 56.2 54.9 53.8 52.6 51.8 51.1
245 66.6 64.3 62.2 60.4 58.8 57.4 56.2 55.1 53.9 52.7 51.5 50.5 49.5
260 65.7 63.2 60.9 59.3 57.6 56.2 54.8 53.8 52.6 51.6 50.5 49.4 48.5
Coal strength, psi 766 Mining width, ft 11.50 No. web pillars 9
Mining Height, ft
0
10
20
30
40
50
60
70
80
90
0 50 100 150 200 250 300RAW RECOVERY, % DEPTH OF COVER, ft
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
Mining
Height,
ft