Design-Build Services


Interstate MAX Line Design-Build

Location: Portland, Oregon

DEA was the lead engineering, construction engineering, and survey firm for the design-build delivery of a new segment of light rail in Portland, Oregon.

Line Section 10C was TriMet’s $33 million, 8,000-foot-long extension of the Interstate MAX light rail line. The section included two stations, both incorporating park-and-ride facilities. About half of the segment was carried on a 4,000-foot-long, 28-span, prestressed, precast concrete bulb-T girder bridge with a cast-in-place concrete deck.

DEA used a fast-track design approach that divided the project into multiple design packages in order to meet the strict in-water work periods for the construction of foundations in the Columbia Slough and to accelerate overall construction. This resulted in project delivery to TriMet approximately nine months ahead of schedule.

Project Awards

  • 2004 Engineering Excellence Award, Society of Military Engineers, Portland Post
  • 2004 Excellence in Concrete (Bridges), Oregon Chapter of the American Concrete Institute
  • 2005 Project of the Year, ACEC Oregon

Additional Services

Learn more about our other services and offerings:

Landscape Architecture Services
Construction Engineering
Transit and Railroad
Alternative Project Delivery