Whether improving existing infrastructure or building new projects, TRC understands the need to
advance safety, connectivity, community livability and environmental stewardship. From design,
construction, and inspection, to responding to emergencies and quickly repairing or replacing key
assets, TRC delivers sustainable solutions that support our nation’s vital infrastructure networks.
Idaho Avenue Pedestrian Overcrossing
Bridge, Santa Monica, CA Oroville Dam, Oroville, CA
TRC served as construction manager on the Idaho
Avenue Pedestrian Overcrossing Bridge, which
included construction of a 1.2-mile bike path and
jogging trail. The work was part of a larger $20
million project in which TRC assisted the City of
Santa Monica in rebuilding the California Incline
Bridge, which connects Santa Monica to the Pacific
Coast Highway. The original 750-foot bridge was
constructed in the 1930s and needed to be brought
up to current seismic standards. In February 2017 the primary and emergency
spillways of the Oroville Dam in Northern California
suffered significant damage due to record rainfalls,
including 13 inches of rain in just 5 days. After
thousands of downstream residents were
evacuated, repairs began with work crews,
including TRC, entering the scene.
The bridge was named California’s Outstand-
ing Bikeway and Trails Project for 2017 and has
received numerous awards, including a 2018
Engineering Excellence Honor Award from the
American Council of Engineering Companies of
California and the 2017 International Bridge Confer-
ence Arthur G. Hayden Medal.
16
2018 Sustainability Report
The first phase of the project focused on mak-
ing temporary repairs to the main chute and the
emergency spillway. Subsequent phases included
demolishing the 3,055 foot long main spillway and
erecting a much stronger replacement, as well as
permanently repairing the emergency spillway.
Work will continue into 2019 to finish regrading
eroded hillsides, planting new vegetation, and com-
pleting infrastructure improvements to the visitor
center parking lot and boat launch facilities. TRC
continues as an integral part of the project team
through project completion.