Stormwater Improvements for the RTD Fasttracks West Corridor Light Rail Line

The West Rail Line was the first of six new segments of Light Rail Transit to be designed and constructed under the Regional Transportation District (RTD) FasTracks Program in the Denver Metro Area. The West Rail Line stretches 12.1 miles from the Auraria Campus in downtown Denver to the Jefferson County Government Center in Golden, with a total project cost in excess of $700 million. As the Stormwater subconsultant for the project, Muller Engineering collaborated with prime consultant David Evans & Associates, contractor Denver Transit Construction Group, and numerous other subconsultants over a seven-year design and construction period. Muller’s scope of work included design of a wide range of improvements including:

  • floodplain modeling including a CLOMR and LOMR
  • 2.5 miles of major drainageway improvements
  • 7 drop structures
  • 9 major drainageway cross culverts
  • 36 Urban Drainage and Flood Control District maintenance-eligible outfalls
  • local drainage facilities for the entire corridor and adjacent roadway improvements
  • trackway drainage
  • 2,000 lineal foot box culvert that reduces the 100-year floodplain and took nearly 30 structures out of the floodplain
  • detention and/or water quality for 3 Park-n-Ride stations and major roadways
  • a water quality assessment for the trackway and ballast
  • irrigation ditch facilities
Lakewood Gulch
Dry Gulch drop structure Aerial courtesy of David Mallory