Since 1978, Willdan Engineering has maintained a full-time design group assigned solely to structural engineering and trained in preparing analysis and design of bridges, sound walls, retaining walls, and buildings. Our division has an extensive working knowledge of the latest Caltrans, AASHTO, ACI, and AISC criteria and methods. We have designed hundreds of bridges in California.
- Study and Analysis
- Bridge Advance Planning Studies
- Bridge Planning/Feasibility Studies
- Bridge Evaluations
- Bridge Inventory and Operating Rating Study
- Bridge Sufficiency Rating Analysis
- HBRR (now HBP) Funding Application
Bridge Preliminary Engineering
- Bridge Type Selection Report
- Bridge Preliminary Design
- Seismic Retrofit Strategy Report
Design and Construction
- Local Bridge Replacement/Rehabilitation
- Freeway Overcrossing, Undercrossing and Ramp
- HOV Bridge Widening
- Railroad Bridge and Grade Separation
- Bridge Seismic Retrofit
City of Rosemead, Garvey Avenue over the Rio Hondo Channel HBRR Bridge Replacement — Los Angeles County, California
Outstanding Transportation Project of the Year, APWA SoCal
Willdan provided engineering design, survey, geotechnical engineering, hydrological/hydraulic evaluation, environmental documentation, utility coordination, contract administration, construction observation, and federal labor compliance services for the HBRR-funded replacement of the Garvey Avenue Bridge over the Rio Hondo Channel. The new 655-foot-long bridge ranges in width from 52 feet to 100 feet (including shoulders and sidewalks) and includes channel slopes and a bike path. A state of the art Spliced Precast Concrete Bulb Tee girder design was adopted for the replacement structure. Project construction cost was estimated at $10 million.
The Garvey Avenue Bridge Replacement received an Outstanding Transportation and Streets Project of the Year award from the Southern California APWA in 2008, and an Outstanding Project award from the Western Council of Construction Consumers in 2009.
Bridge Replacements — Glenn County, California
Willdan assisted the County of Glenn with the preparation and processing of the federal aid bridge program applications, helping the County to qualify for $28M of federal bridge replacement funding. As a result of the funding award, Willdan developed the Advance Planning Studies and replacement conceptual designs for seven bridge replacements for the County, including crossings at Stony Creek (pictured above), Howard Slough, Walker Creek and Wilson Creek), and is currently developing the environmental documentation and final designs.
U.S. Army Corps of Engineers, L.A. River Bridges — Los Angeles County, California
Project of the Year, APWA
Willdan performed planning and design for a new 755-foot, 4-span Union Pacific Rail Road bridge over the Los Angeles River and a 282-foot, 3-span bridge over Dominguez Channel with hydraulic parapet walls and retaining walls on the right-of-way. The aggressive schedule required final PS&E in six months. In addition, Willdan designed modifications to a total of 24 bridges over the Los Angeles River, including the replacement of a pedestrian/equestrian steel truss bridge, and hydraulic and seismic loads and demolition plans for Horseshoe Bridge, all as part of an extensive U.S. Army Corps of Engineers flood control project, managed by Willdan, which was awarded 2002 Project of the Year in the category "Disaster or Emergency Contruction/Repair, More than $10 million" by the national American Public Works Association.
City of Pinole, Prune Street Pedestrian Bridge Replacement
Distinguished Project of the Year, Western Council Construction Consumers
The Prune Street pedestrian bridge, constructed in the 1960s to connect the residential area adjacent to Pinole Valley Road to the downtown commercial district, was declared structurally unsound and closed in 2004. The City asked Willdan to design and provide project management for a replacement bridge which would not only be functional much longer than the original bridge but would also be much more aesthetically pleasing. Because of its location, the bridge required the approval of multiple regulatory agencies.