US 40 over Elk River near Steamboat Springs

Steamboat Springs, Colorado

The US 40 bridge replacement over the East Fork of the Elk River project replaces the existing bridge, located approximately eight miles west of Steamboat Springs in Routt County. The goal of the project was to replace the existing bridge with a new structure and roadway approaches, improving roadway safety by increasing shoulder widths and sight distances for the local accesses as well as improving the hydraulic performance of the bridge opening. Tsiouvaras Simmons Holderness proposed replacing this functionally obsolete three-span bridge with a new two-span bridge, and making the bridge wider to meet the current roadway standards. In addition, TSH conducted geomorphic and hydraulic analysis for this destabilized channel. US 40 is an important east-west national highway, one of only three east-west routes through Colorado, providing an important regional link between communities in northwest Colorado through Yampa River Basin ranch lands.

  • Calibration of split flow hydraulic analysis with field reconnaissance from 100-year storm event
  • Bridge hydraulic analysis and scour estimation
  • Gathered large amounts of information from the 100-year flood event that occurred during the design phase of this project