California Department of Transportation – also known as Caltrans – has appointed Sterling Construction subsidiary Myers & Sons Construction for the US$26.4m project.

Work will be carried out on the Mokelumne River Bridge off Interstate 5, the North Sacramento Undercrossing of the Sacramento Regional Transit railway and the Paintersville Bridge over the Sacramento River.

Sterling CEO Joe Cutillo said: “Some of these bridges are more than seventy-five years old and while they have been deemed safe, upgrading their features helps to abate issues surrounding general wear and tear. The upgrades will also make the bridges more resistant to ground motion, seismic activity and other earthquake-related matters that can be prevalent in this part of the country.”

The Mokelumne River Bridge retrofit includes the construction of four new bent caps, repairs to two hinges and the application of composite strengthening to all columns.

Work on the North Sacramento Undercrossing involves repairing hinges and adding stability at three columns by installing isolation casings.

At Paintersville Bridge, Sterling will be adding four bent caps, including 2.4m cast-in-drilled-hole piles, and extending each abutment, while replacing the approach slabs.

The work is scheduled to start in May this year and finish in September 2021.