Design-Build Services


MAX I-205 LRT Extension

Location: Portland, Oregon

David Evans and Associates, Inc. (DEA) was the lead designer for this $150 million design-build construction project in the Portland, Oregon metropolitan area. The new 6.5-mile light rail extension lies roughly parallel to Interstate Highway 205 and adds eight new light rail stations and four new park-and-ride facilities with space for 1,126 cars to Portland’s nationally recognized multi-corridor light rail transit (LRT) system. The DEA team worked closely with TriMet to develop a distinct character for the project that would harmonize with the system as a whole.

At TriMet’s request, DEA evaluated the recommended station locations, considering their location and design for opportunities to facilitate transit oriented development. DEA identified potential development opportunities around each station and worked in collaboration with TriMet to set priorities for the pursuit of those development opportunities.

The project design involved extensive interface with the freeway and multi-use bicycle and pedestrian pathways. DEA led all design services for the project, including track, bridge, interface with I-205, station and park-and-ride facilities, and environmental impacts mitigation. As part of this effort, DEA designed nine new bridges along the extension to grade-separate the crossings, and provided systems integration services to verify that civil design components were fully integrated with light rail systems such as electrification, signals, communications, fare collection, and vehicles.

The DEA team also worked to maximize sustainable design opportunities in the course of the project, including the successful re-use of existing elements. Additionally, a variety of water quality treatments, including vegetated bioswales and the use of pervious pavement, were incorporated into the design to clean and detain stormwater runoff.

Project Awards

  • 2010 Design-Build Award for Transportation Projects Over $50 Million, Design-Build Institute of America
  • 2010 Honor Award, ACEC Oregon