PERMFILE64662

• Permit No: C1980007
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: Exhibit 14A Landslide Study Geo-Hydro Consultants 1980
• Media Type: D
• Archive: No

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general terms, the feasibility of the construction in the land-
slide area and construction methods that might be required to
prevent further deformations of the landslides or catastrophic
movements that would endanger the proposed construction.
i During the first phase of our study, engineering geological
mapping of the area has been performed; it consisted of visual
classification of important morphologic and topographic features
that are usually pertinent to landslides and of other factors
i that are important for the stability. No surveying was used as an
~ aid during mapping except for surveying of several profiles that
have been used for interpretation purposes and.that will be used
i
,~ in Phase 3 of our study. The accuracy of the geotechnical map
~i that has been prepared as a result of our mapping program is
therefore limited. ~
i
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ji To provide data on subsurface conditions, a total of six
li borings were drilled and six Cest pits excavated during Phase 2
I of our study. Locations of the borings and test pits are indi-
~i Gated on Plate 1 - Geotechnical Map. Three borings (P1, P2, P3)
i
~ were located at the axes of the originally assumed mine entries
~! Nos. 5, 3, and 1 at the expected location of the portal cut.
Three borings (A6, A7, A8) were located along the alignment of i
~~ the proposed mine access road. Six test pits (T1 through T6) were
i~
ii excavated in the vicinity of the future mine portal cut. Detailed
i~ logs of borings are not included in this report; only data
Pertinent to the scope of this phase of work are presented.
2.0 LANDSLIDES AT THE SITE

I, 2.1 GEOLOGY AND HYDROLOGY
Rocks exposed at the construction site belong to the Mesa-
" verde Formation of the Upper Cretaceous Age. They are mostly
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