Los Angeles County Metro Expo Line Operations and Maintenance Facility

Tetra Tech’s High Performance Buildings group provided mechanical, electrical, plumbing (MEP), and energy-efficient design services for this modernized maintenance facility— located on a brownfield site just east of Santa Monica—to support the rail line and provide efficient operations as ridership increases in the years to come.


  • Size: 70,000 square feet/8.3 acres
  • Construction Cost: $100 million
  • Client/Owner: Exposition Construction Authority
  • Architect: RNL Design
  • Contractor: Holder Construction
  • Completion Date: 2016


With the city of Los Angeles continuing to reinvest in public transit and looking to become a cleaner, more pedestrian-friendly city, the highly anticipated Expo Line light rail was designed to finally connect downtown Los Angeles with Santa Monica and unite the neighborhoods in between. A modernized maintenance facility was designed to support the rail line, and provide efficient operations as ridership increases in the years to come.

Energy-efficient systems such as radiant floors, LED lights, underfloor air distribution, demand-controlled ventilation, and a solar hot water system support the sustainable operation of the Expo Line.

Metro and the community’s design considerations for the maintenance facility were traffic, sound, aesthetics, safety, energy efficiency, and low maintenance requirements. To mitigate the Expo Line’s economic, environmental and social impact, Glumac worked with architects RNL and a team of civil and structural engineering specialists to implement an integrated design strategy.

The Operations and Maintenance Facility is located on two adjacent properties and includes four buildings: a Maintenance Building, a Wash Building, a Secondary Building, and a Cleaning Building. The facility will consist of six storage tracks for three-car train sets, a light maintenance/repair shop, administration facility, blow-down facility, run-through wash plant, double-track interior car-cleaning platform, and a traction power substation, designed to maintain the fleet of 43-45 vehicles. The site will have parking for staff and visitors, paved aprons, ramps, and roadways; and a 24/7 guarded entry.

Images courtesy of RNL Design