Alameda Corridor

Los Angeles

Mammoth trench improves movement of freight rail and vehicle traffic

• Corridor is first consolidated rail link of its kind
• Trench extends half the length of project
• Design-build team delivers most effective solution

HNTB was part of a joint venture design-build team selected for the Alameda Corridor’s largest section – a 30-foot-deep by 51-foot-wide trench – the first consolidated rail link of its kind. The massive reinforced concrete trench, which stretches half the length of the 10-mile project, allows freight rail traffic to operate without interfering with vehicular traffic, improving the movement of both modes throughout the area.

HNTB was responsible for project management and engineering design of the trench and associated project components, including the trench structure, bridges, streets, storm drains and utility relocation.

The design-build team’s experience enabled it to thoroughly weigh the ramifications of cost verses schedule, resulting in the most effective design and construction solution from an overall perspective.

Today, the Alameda Corridor provides safe, efficient rail access from the ports of Los Angeles and Long Beach to major transcontinental rail yards near downtown Los Angeles.