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.
Client: City of Central
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