PERMFILE135086

• Permit No: C1981038
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Doc Name: Geotechnical Review
• Section_Exhibit Name: Volume 6 PHASE I STABILITY ANALYSES Appendix
• Media Type: D
• Archive: No

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presented in this report.
1.3 PREVIOUS STUDIES
Several studies have been performed within the mine
area by various consultants to Colorado Westmoreland, Inc.
Results of these studies may be partly utilized for the pur-
pose of our work. The studies were made available to us; all
of them have been reviewed and their results are used during
this phase of the work.
The studies include analyses of reclaimed configurations,
performed by Kenneth Medearis Associates, subsurface soils
investigation performed by Lincoln DeVore, studies for the
proposed coal handling system performed by ?'he Willis and Paul
Corporation, and the subsoil investigation for the water tank,
prepared by Fox Consulting Engineers and Geologists. In ad-
dition to these studies, the mine management made available
to us results of previous studies that provide data on re-
gional geology and hydrology of the area, and two sets of
aerial photographs which cover the area of the mine and its
vicinity.
2.0 SITE CONDITIONS

2.1 GEOLOGY AND HYDROLOGY
The area of the Orchard Valley Mine is located in the
Mesa Verde Formation of the Paonia Coal Field. Underlying the
Mesa Verde Formation is the Mancos Shale. Both these formations
cco~noaocowumw.n+c.