Chase Gulch Reservoir Central City, Colorado Deere & Ault staff provided complete engineering, design, and construction
engineering services for a concrete-faced rockfill dam in the mineral belt area of the
Colorado Front Range near Central City, Colorado.
The dam site is at an elevation of approximately 8,700 feet. The dam impounds water
on Chase Gulch, a tributary to North Clear Creek. Preliminary designs were prepared
for both a concrete-faced rockfill dam and a roller-compacted concrete dam. The concrete
faced rockfill embankment dam was selected as the most suitable for the site conditions
and available construction materials.
Chase Gulch Dam is a 100-foot high concrete-faced rockfill dam.
The photo illustrates rockfill placement and initial construction
of the face slabs.
The dam consists of a 100-foot high, quarried, rockfill embankment with upstream
slopes of 1.4:1 (horizontal to vertical) and downstream slopes of 1.3:1 with a
crest width of 25 feet. A concrete toe plinth and upstream concrete face provided
the water barrier. A foundation grout curtain constructed through the toe plinth
intercepts potential under-seepage. Appurtenant structures included:
A 30-inch diameter outlet pipe through the rock foundation with an upstream guard gate
and downstream valve.
A pump station to convey raw water from the dam to the water treatment plant.
A chute-type spillway excavated in the rock around the left dam abutment to pass flood
flows
600 South Airport Road -- Suite A-205 -- Longmont, Colorado 80503
Phone (303) 651-1468 -- Fax (303) 651-1469
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