Matrix designed, permitted, and completed construction management for this riverine project which included river restoration and improved floodwater conveyance. This nearly $20M project, located near downtown Denver, was one of the last remaining flood hazard mitigation projects on the South Platte River and reduced the 100-year floodplain in the Central Platte Valley by 365 acres.

Work included the widening and deepening of the channel to improve conveyance capacity while protecting the community and critical facilities and structures from flood hazards sans reliance on berms or levees. Improvements included major grading, recreation-compatible drop structures, outcrop jetties, a cooling tower intake for the Xcel plant, utility protection/relocation, retaining walls, regional trail connections, and revegetation.

This localized flood control project protects the critical facilities of the Zuni Power Plant, Interstate Highway 25, college campuses of the University of Colorado at Denver, Auraria Community College, Metropolitan State College, the 20,000-seat Pepsi Center stadium, and the Six Flags amusement park. Also protected are the Consolidated Main Line (CML) railroad and the existing and future light rail corridors. In addition to alleviating flooding, the project restored aquatic, wetland, and riparian habitat to the urbanized South Platte River channel corridor. Boaters are now able to navigate the river throughout the downtown area.

Services included:

  • Hydrologic Modeling and Analysis
  • Hydraulic Modeling and Analysis
  • Stormwater Infrastructure Design
  • River Restoration and Channel Design
  • Channel Stability Analysis
  • Water Rights Analysis
  • Water Quality Analysis
  • Permitting 
  • Flood Map Revisions (CLOMR, LOMR)
  • Flood Hazard Mitigation
  • Construction Documents
  • Cost Estimating