1987-12-01_PERMIT FILE - C1981017 ‎(289)‎

• Permit No: C1981017
• IBM Index Class Name: PERMIT FILE
• Doc Date: 12/1/1987
• Doc Name: Geotechnical Investigations Mine Portal Benches and Haul Roads
• Section_Exhibit Name: Chapter V Appendix V-E-II
• Media Type: D
• Archive: No

listed where the character of the cut or fill changes within a
continuous segment. The specific properties detailed for fill
slopes are height of fill , slope angle, angle of natural ground
below fill , water seepage from fill , character and condition of
vegetation on fill , and conditions of instability of fill.
slope. The corresponding properties are given for the cut
slopes, with the additional notation of the earth material in
the cut. Portions of _the roads subject to avalanche activity
were recorded on the logs. The locations of major avalanche
runs were plotted on the 1" = 400' scale maps by Mid-Continent
Resources, Inc. This information was incorporated into the road
logs as were the locations of additional zones with a less
severe avalanche hazard.
Tables 2 through 12 provide a summary of the configur-
ations , geotechnical conditions, and avalanche danger of the
haul roads. Table 2 provides a breakdown of road construction
configurations,. listing for each road, the total length of
construction in cut only, fill only, both cut and fill , and
road sections having no significant earthwork. Totals are given
of total length in cut (combined total of length in cut and ,
fill plus cut only) , total length in fill (combined total of
length in cut and fill plus fill only) , and overall road
length for each road. Finally, totals are given in each con-
figuration category for the combined length of all the haul
roads .
Tables 3 through 10 present an individual detailed summary
of road configurations and geotechnical conditions for each of
the haul roads. Fill and cut parameters from the road logs are
broken down into several categories, and the length of road, in
feet and percent of total road length, is summed for each
category.
Road cut parameters are material , height, cut slope , cut
stability, vegetation cover and water seeps. Material of the
cut slope is defined as cut in soil , cut in rock , or cut in
mixed soil and rock, generally bedrock in the lower portion of
the cut capped by colluvium in the upper portion of the cut.
The height of the cut is described as up to 20 feet, up to 40
feet, up to 60 feet, or up to a height exceeding 60 feet. The
slope of the cut is defined as up to a 20 degree angle to
horizontal , up to 40 degrees, up to 60 degrees , or up to an
angle in excess of 60 degrees. Cuts are classified as having
minor or no stability problems, moderate stability problems or
important stability problems. Minor stability problems include
infrequent minor sloughing and erosion which have a negligible
effect on the overall stability of the slope. Moderate
stability problems include minor to moderate sloughing and
erosion which may contribute to further instability of the
slope to a limited degree. Important stability problems include
major and severe sloughing, erosion, gullying, and landsliding
10
GE04MRO CONSULTING,INC.