Featuring a main 118,000-sq-ft steel-framed building and a 70,000-sq-ft state-of-the-art maintenance facility built with Thermomass insulated concrete tilt-up panels, the new Depot District also includes a new bus wash building, diesel and gasoline fueling center and guard house. The authority now has maintenance capacity for its full fleet of 150 transit buses. To accommodate the owner’s alternative-fuel, clean-air transit vehicles, there are facilities for charging up to 24 electric buses and refueling the fleet of 47 compressed natural gas buses.

During excavation, the team used air quality monitors to ensure safe working conditions. When it came time to dispose of the site’s petroleum-laden soils, the contractor’s preconstruction team managed to locate a vendor that would accept the tainted soils for a fraction of the original estimate, saving nearly $1 million.

Photo by Alan Blakely Photography

Meanwhile, the project’s Federal Transit Administration funding hinged on a Buy America procurement requirement, even though the design and specifications were not developed with such limitations in mind. To work around this, the team spent extensive time researching, locating and documenting materials and equipment that would fulfill these obligations.

A detailed project-specific quality management plan outlined expectations and contract requirements for the entire project team. Drawing on expertise from highly qualified subcontractors helped optimize every element of the project as well. This input drove modifications such as switching the fuel tank design from cylindrical to square, which improved the layout of the stairs, walks and railings as well as accessibility and safety.