PERMFILE72187

• Permit No: C1981019A
• IBM Index Class Name: Permit File
• Doc Date: 1/26/2005
• Section_Exhibit Name: Rule 3 Performance Bond Requirements
• Media Type: D
• Archive: Yes

• 4.12 SLIDES AND OTHER DAMAGE
Because of the mining technique used at the Colowyo operation and the inherent nature of
the coal geology, no natural barriers will be necessary.
At any time a slide occurs within the permit area which may have a potential adverse affect
on public property, health, safety, or the environment, Colowyo will notify the Division or
other appropriate governmental agencies and comply with any remedial measures necessary.
Higher than normal precipitation occurred in northwest Colorado in 1984 and 1935 causing
numerous landslides and slope failures throughout the region. One such slide occurred on a
section of the paved haul road and remedial actions were necessary to stabilize the area. For
further information regarding the remedial action, refer to Section 2.05.3 and Exhibit 17,
Hau( Road Facilities Modifications. This area has remained stable since implementation of
the remedial measures.

\J
4.12-1