PERMFILE139786

• Permit No: C1982056
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: Exhibit 07f-1 Rockfall Hazards Study Norther Mining District
• Media Type: D
• Archive: No

Twenty Mile Coal Company
May, 1999
S
~L
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^ 'Av
Source area showing undercutting o}
of slabsboulders.
Protect No. 99.15
plate 6 Close-up of Source Area. (Note: Structure leads to large slabs being formed.)