SCH Number 2024100061

Project Info

Title

Bridge Scour Mitigation Project

Description

The California Department of Transportation (Caltrans) is proposing to perform scour mitigation and countermeasures on four bridges along Interstate 5 in Colusa County, State Route 20 in Sutter County, and State Route 70 in Butte County. Scour activity is causing degradation of the soil that provides lateral load support to the bridge foundations. Two of the four bridge structures are located on Hunters Creek on I-5 in Colusa County. Hunters Creek has an eroded north abutment slope and needs to be armored to prevent roadway stability. Sutter Bypass located along SR 20 in Sutter County is susceptible to closure due to column buckling and scour at high flows. To reduce the risk of column buckling and scour at high flows, rock slope protection would be placed at the west, middle, and east channels of the Sutter Bypass. The Dudley Creek bridge has a scour hole at the north abutment footing that needs to be armored to prevent undermining of the footing.

2 documents in project