CALIFORNIA STATE EDITION
A Supplement to:
December 29 2024 Vol. XXV • No. 26
“The Nation’s Best Read Construction Newspaper… Founded in 1957.” Your California Connection – Sharon Swanson – 1-760-518-4336 – sswanson@cegltd.com
SFCTA Bridges Retrofit Addresses Seismic Safety By Ruksana Hussain CEG CORRESPONDENT
The San Francisco County Transportation Authority said it is on schedule to complete the $126 million West Side Bridges Retrofit project on Treasure Island Road by addressing eight existing bridge structures that are seismically deficient with new retaining walls, roadways and a retrofitted bridge to meet current safety standards. Construction began in June 2023 on the structures, which are a crucial connection between Yerba
Buena Island, Treasure Island and the Bay Bridge and will be completed by late 2026. This is one part of a larger multimodal infrastructure improvement program on the Islands, the other two completed being the I-80 East Side Ramps Project (2016) and the Yerba Buena Island/I-80 Southgate Road and Interchange Project (2023). The eight existing bridge structures are on the west side of Yerba Buena Island and comprise a viaduct along Treasure Island Road, just north of the San Francisco-Oakland Bay Bridge (SFOBB).
Permeation grouting is under way on a retaining wall.
see BRIDGES page 8
Soldier pile installation continues with the San Francisco-Oakland Bay Bridge in the background.
Lake Perris Emergency Release Facility Project Under Way Furthering efforts to modernize California’s water infrastructure and improve public safety, the California Department of Water Resources (DWR) announced on Dec. 9, 2024, that it is starting construction on the $62 million Lake Perris Emergency Release Facility project in Riverside County. Sukut Construction of Santa Ana, Calif., will build new infrastructure to safely redi-
rect water and protect the community should Lake Perris need to be lowered during an emergency event, like a major earthquake. Planned improvements will include new levees, bridges and a local drainage system downstream of Perris Dam. With this additional infrastructure, water could be redirected from Lake Perris through levees into a drainage channel and ultimately into the
Perris Valley Channel. These upgrades, along with improved roadside landscaping and relocation of utilities, will protect the community and other infrastructure, including a local school, Interstate 215 and a water treatment plant. “As earthquakes and extreme weather events are a constant threat to our infrastructure, DWR continues to modernize our facil-
ities to be resilient and protect the local community and California’s water supply,” State Water Project Dam Safety Services Manager David Sarkisian said. “The project’s improvements downstream of Lake Perris will provide additional protection for the community through the construction of drainage infrastructure.” see LAKE page 9