Project Highlights:
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Client:
State of Colorado
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Drainage:
South Platte
at
Barr Lake State Park Dam
7,100 foot long, high hazard dam capable of storing up to 40,000 acre-feet of water, in
Adams County, Colorado
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State of Colorado determined that the existing spillway was inadequate
e
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Designed improvements to upgrade the facility
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Determined the Probable Maximum Precipitation (PMP) event and developed a HEC-HMS model to define the inflow design flood (IDF) for the facility
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Hydraulic analyses to size and route flows through new spillway, quantifed erosion protection
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Peak inflow rates to the reservoir were found to be on the order 55,000 cubic feet per second with a total inflow volume of over 15,000 acre feet
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Designed armored spillway, crest length 185 feet included raising three miles of perimeter dikes
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