Chelan PUD Rock Island Maintenance Complex


This $27.9 million project for the Rock Island Dam campus was envisioned as a central hub for PUD personnel. The campus included three buildings with specialized needs. Building C21 serves as office, lockers, and gym, C19 provides training and lunch break spaces, and C22 is a fabrication building with and paint booth, pallet racks, and loading dock. The architect adeptly created a campus that met practical needs for dam maintenance while providing an inviting space for personnel—resulting in a thoughtful design that was recognized in 2023 with an Honor Award from AIA Southwest Washington. PCS rose to the challenge of providing structural design that best supported each structure’s unique purpose.

​​​​​​​The industrial building functions as a maintenance space for facility repairs. A 70-ton gantry crane must travel though the building to deliver large parts to various work stations. To accommodate the crane, a 43’-wide by 32’-high custom hydraulic door was put in place. A single hydraulic piston on each side maximizes the opening size.  Large members were added at the door frame to support the weight and wind load of the door and hinges. Likewise the floor foundation was designed to meet the tonnage requirements.

At Building C19, the wood-frame structure employs a cantilever to create a covered parking space. Steel framing added the necessary support. The architect envisioned an exterior floating stair that would not impede the landscape views. A postless stair, however, was not within budget. PCS worked closely with the architect to achieve a structural design that met their goals and still controlled cost. The end design made use of minimal poles which still allowed for unimpeded views of the surrounding landscape.

A configuration of steel support beams and tight floor-to-ceiling heights provided a challenge for mechanical systems. It was necessary to strategically perforate the beams to house the duct work. PCS worked closely with the mechanical engineer to add reinforcement to beams at those points.

Photo credit: Pete Eckert