2013-09-19_PERMIT FILE - C1981019A ‎(2)‎

• Permit No: C1981019A
• IBM Index Class Name: Permit File
• Doc Date: 9/19/2013
• Doc Name: Geotechnical Report South Taylor Excess Fills
• Section_Exhibit Name: Exhibit 21 Item 1 -ST
• Media Type: D
• Archive: Yes

Colowyo Coal Company, L.P.
Attn.: Mr. Juan Garcia
January 4, 2013
Page 6 of 7
Sincerely,
SHANNON & WILSON, INC.
Mark G. Gray, P.E.
Senior Associate
MGG:GRF /jjs
SHANNON 6WILSON. INC.
Reviewed by:
Gregory R Fischer, P. E.
Senior Vice President
Enc: Table 1 — Summary of Stability analyses
Figure 1 — Plan and Section Views of Spoil Fill
Figure 2 to 9 — Stability Analyses Output
Figure 10 — Summary of Spoil Strength Test Results
Figure 11— Total and Effective Stress Mohr Envelopes, Clay, Boring C -104
Figure 12 — Summary of Clay Strength Test Results
23- 1- 01105 -600