REP33384

• Permit No: M1977342
• IBM Index Class Name: Report
• Doc Name: PROBABILISTIC SEISMIC HAZARD ANALYSIS OF HENDERSON TAILING DAM NORTH CENTRAL COLO
• Media Type: D
• Archive: No

LIST OF ILLUSTRATIONS AND FIGURES
Page
Map 1 -The Urad Valley prior to AMAX operations 2i3 Figure 6-Urad Lake (lhe upper reservoir)
Figure 1 -The Urad Valley and Red Mountain looking
toward the west as they appeared in 1962. The
road system on the mountain was the only
construction completed by AMAX at that time.
Note the original tailing and mill at the mine
site 6
Figure 2 - A closer view of the original tailing area in the
bottom of the valley 7
Figure 3-A closer view of the old mill used in previous
molybdenum mining 7
Figure 4-The burn on the south side of the lower por-
tion of the valley. Note the healthy unburned
stand of forest on the upper right side of the
picture. It is estimated this fire occurred about
90 years ago which demonstrates the slow
regrowth in this environment 8
Figure 5-An avalanche run into the valley on the south
side of Red Mountain 8
Map 2-The Urad Valley after AMAX operations 10/11
Figure 7-The glory hole on Red Mountain caused by
the internal caving of the ore body
Figure 6-Bristlecone pine stand on the southwestern
flank of Red Mountain.
Figuie 9-Coherez ithe dark color) Spayed on i e o..=.
tailing area for the control of fugitivendust ~
Figure 10-Coherex being spread on the roads for
dust control
~ii~uie i i - T iiE hydro iTi UiC tier .n OpCrat:o^
Figure 12-Spraying fertilizer on a road bank with a "Fer-
tiblast" gun
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Figure l3-1973 research test plots on tailing material.
All plots using sewage or manure amendments
produced lush grass growth evident in the
picture. The bare plots had no sewage or
manure 26
Figure 14-Experimental design of the 1974 revegetation
plots 27