I 90, CD'a RV BR EBL & WBL, shoshone CO

This Project Grant from the Department of Transportation Federal Highway Administration awarded $143,750 to the Idaho Department of Transportation on April 16, 2021 under the Highway Research and Development Program (CFDA 20.200). The funding will support replacement of bridges carrying Interstate 90 over the Coeur d'Alene River in Shoshone County, Idaho. Work will include constructing new, wider bridges to current standards with a minimum 17-foot vertical clearance over the interstate. This project addresses deficiencies in the existing bridges such as excessive spalling, cracks and exposed reinforcement. The new bridges will improve transportation infrastructure safety and mobility in accordance with the objectives of the Highway Research and Development Program.

Project description

This project will replace the I-90 coeur D'alene river structures. The existing structure currently has many deficiencies that include: excessive spalls and cracks, exposed reinforcement throughout structural components; along with a substandard vertical clearance. The new, wider bridge will be constructed on a variable raised profile that meets current standards and the minimum 17.0 feet vertical clearance over I-90. The project is located on I-90 between mile points 51.947 and 51.961.