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Click on
each picture to see a larger view Horsethief
Reservoir now under construction Construction
Firm: Max Jantz Excavating, Montezuma, KS Construction
Engineering Firm: URS Corporation, Overland Park &
Denver, CO |
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A milestone was
reached when construction began on the principal spillway the last
week of August, 2008.
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 Shale
bedrock was excavated until the desired depth was reached. |
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When the water elevation in the reservoir
exceeds normal pool, water flows over the top of the intake tower,
and falls more than 40 feet to the bottom, where it flows into a 60
inch diameter pipe that extends through the dam. As water exits the
pipe it travels through an exit works before falling into a stilling
basin.
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 Cracks
in the bedrock were cleaned before they were filled with grout.
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A level concrete “floor”
called a mud mat was poured the length of the pipe.
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After
pouring the mud mat, the foundation of the 14 feet square by 43 feet
tall intake tower was poured. |
Reinforcing
bars were grouted into the tower foundation to insure stability of
the tower, scheduled to be completed by mid-November. |
 Pipe
supports were poured at regular intervals the length of the mud mat. |
 After
the pipe supports had “cured,” the 405 foot long principal
spillway pipe was installed, three 45 foot sections per day. |
The
pipe was initially spot-welded at each joint. Permanent welds each take
a day to complete. After welding and pressure-testing is completed, the
entire length of pipe will be enclosed in concrete.
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 As
water exits the 60” pipe, its momentum will be slowed as it flows
down into the stilling basin, reducing the risk of erosion in the
outlet channel. |
Excavation
of the outlet channel downstream from the stilling basin.
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As
water flows down the outlet channel, it re-enters Buckner Creek on
the downstream side of the dam. |
