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Caption... |
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In
October of 2002, an upstream blanket was placed along the reservoir
help essay proofreading from history
bottom just south of Horsetooth Dam. |
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The
blanket is composed of clay and impermeable plastic layers. |
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The
blanket covers the portion of the reservoir bed where the Forelle
limestone surfaces, helping water "escape" through
the limestone, under the
dam. |
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In
2002, Reclamation engineers decided the upstream blanket was
a more
effective treatment for the seepage underneath the dam than
the originally
proposed cut-off wall. |
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By
installing the blanket instead of a cut-off wall, Reclamation
was
also able to shave time and money off the overall project. |
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The
blanket is 800 feet long and 300 feet wide. It is covered with
clay and designed to last more than 50 years. |
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Horsetooth
dam in late summer looking west to east across the downstream
face. Excavation of the dam face is well under way. |
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Once
the downstream face is excavated, the contractor begins placing
the filter at Horsetooth Dam. |
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Looking
east to west across the downstream face of Horsetooth Dam, filter
placement is well under way. The filter is composed of fine
sand and gravel, all sorted by size and then placed in layers. |
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Looking
down from the top of the dam shows the varying elevations and
layers of the filter on the excavated face. |
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Looking
from the the top of the dam down and slightly west, the stockpiles
of materials are visible. Material used to replace the face
and install the filter are sorted by size and then stored in
stockpiles until they are used. |
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Heavy
equipment moves clay at the north end of Horsetooth Reservoir. |
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Looking
east at Horsetooth Dam, crews work to put a new face on the
50-year-old structure. |
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The
face of the dam, looking west toward the foothills. |
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Looking
southwest, the channels are visible, connecting the pools behind
the reservoirÕs three east-facing dams. |
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From
Horsetooth Dam, this view is to the southwest. |
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The
inlet structure at Horsetooth Reservoir. The facility reached
dead storage in early October. |
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From
the reservoir, looking north toward Horsetooth Dam. |
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Looking
north toward Horsetooth Dam. |
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From
atop Horsetooth Dam, looking southeast. |
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From
an overlook south of Horsetooth Dam, the valve house is visible
in the center left. |
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Looking west, across Horsetooth Reservoir, toward the foothills. |
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The
high waterline at the marina inlet . |
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