ERC - Ecological Resource Consulants, Inc.
The Multidisciplinary Approach.
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Barr Lake Spillway

Barr Lake

Project Highlights:

  • Client: State of Colorado
  • 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
  • State of Colorado determined that the existing spillway was inadequate e
  • Designed improvements to upgrade the facility
  • Determined the Probable Maximum Precipitation (PMP) event and developed a HEC-HMS model to define the inflow design flood (IDF) for the facility
  • Hydraulic analyses to size and route flows through new spillway, quantifed erosion protection
  • 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
  • Designed armored spillway, crest length 185 feet included raising three miles of perimeter dikes
Locations in Evergreen and Boulder, CO
(303) 679-4820