PERMFILE47424

• Permit No: C1994082
• IBM Index Class Name: Permit File
• Doc Date: 10/6/2004
• Doc Name: Geotechnical Design & Operational Considerations for Highwall Mining, IIW & Yoast Areas
• Section_Exhibit Name: Tab 12 Attachment 12-3 Part 2
• Media Type: D
• Archive: No

•
(Figures -Continued)
9 . Seneca IIW Area, Sage Creek/Wolf Creek interburden thickness.
10 . Seneca IlW Area, Wolf Cteek Seam cover.
11 . Seneca IIW Area, Wolf Creek Seam bottom elevation.
12 . Seneca IIW Area; Wolf Creek Seam thickness.
I3 . Yoast Area, Wadge Seam cover. '
14 . Yoast Area, Wadge Seam bottom elevation.
I5 : Yoast Area, Wadge Seam thickness.
16 . Yoast Area, Wadge/Wolf Creek interburden thickness.
17 . Yoast Area, Wolf Creek Seam cover.
18 . Yoast Area, Wolf Creek Seam bottom elevation.
19. Yoast Area, Wolf Creek Seam thickness.
20, Typical cross sections, Seneca IlW Area,
21. Typical cross sections, Yoast Area.
22. Generalized lithology log, Yoast Area, borehole 3319C.
23. Generalized lithology log, Yoast Area, borehole 3320C.
24. Overall view of the highwall in Sencca 1TVJ at the time of the site visit.
25. Close-up view of the highwall in the Sencca IIW Area.
26. Yoast highwall showing the numerous rider seams above the Wadge.
27. Inactive portion of the Yoast highwall.
• 28. Superior Highwal] Miner system components.
29. Seneca IIW Area, Wadge Seam minability.
30. Seneca IIW Area, Sage Creek Seam minability.
31. Seneca IIW Area, Wolf Creek Seam minability.
32. Yoast Area, Wadge Seam minability
33. Yoast Area, Wolf Creek Seam minability.
34a. Web pillar design charts for Wadge and Wolf Creek seams, Seneca II-W and Yoast
Pits.
34b. Barrier pillar design charts for Wadge and Wolf Creek seams, Seneca II-W and Yoast
Pits.
35a. Web pillar design charts for Sage Creek seam, Seneca II-W Pit.
35b. Barrier pillar design chazts for Sage Creek seam, Seneca II-W Pit.
36a. Yield condition plot for design configuration. Wadge seam, II-W pit.
36b. Safety factor plot for design configuration. Wadge seam, II-W pit.
37a. Yield condition plot fot design configuration. Wolf Creek seam, II-W pit.
376. Safety factor plot for design configuration. Wolf Creek seam, II-W pit.
38a. Yield condition plot for design configuration. Wadge seam, Yoast pit.
38b. Safety factor plot for design configuration. Wadge seam, Yoast pit.
39a. Yield condition plot for design configuration. Wolf Creek seam, Yoast pit.
39b. Safety factor plot for design configuration. Wolf Creek seam, Yoast pit.
40a. Yield condition plot for failed pillar configuration. Wadge seam, II-W pit.
40b. Safety factor plot for failed pillar configuration. Wadge seam, II-W pit.
• 4] a. Yield condition plot for failed pillar configuration. Wolf Creek seam, II-W pit.
41b. Safety factor plot for failed pillar configuration. Wolf Creek seam, II-W pit.
42a. Yield condition plot for failed pillar configuration, Wadge seam, Yoast pit.