Construction Engineering

Beaver Creek Bridge and Fishtrap Creek Bridge

Location: Coquille, Oregon

Client: Coos County

This $4 million bridge replacement project near Coquille in Coos County replaced two timber-supported structures in this flood prone area. Beaver Creek Bridge is a three-span, pile-supported, precast concrete box structure with a cast-in-place concrete deck and included aggregate base, guardrail, paving, water quality swales, a detour structure, and HMAC paving. Fishtrap Creek Bridge was a single-span precast concrete slab bridge with HMAC deck, guardrail, aggregate base, and HMAC paving.

DEA was retained to provide project management; bridge, roadway, and traffic design; and environmental services. In addition, DEA provided construction administration, engineering support, and inspection services. As the Construction Project Management firm for the project, DEA was the single point of contact for the construction contractor during construction, responsible for providing on-site and administrative leadership for the project throughout construction and ensuring that the project was constructed in conformance with the contract plans, specifications, and environmental permits. This included measuring and verifying quality and quantity for work completed and preparing monthly progress payments, coordinating quality control and quality assurance testing for all field-tested materials, and providing issue resolution. We also provided contract administration that ensures that Oregon Department of Transportation (ODOT) documentation, labor compliance, and civil rights requirements and procedures are met. DEA worked proactively and cooperatively with the construction contractor, the county, ODOT, Federal Highway Administration, and regulatory agencies to resolve issues as they arose, enabling us to successfully mitigate potential delay and cost issues and capitalize on opportunities to move the project forward.

The DEA team aggressively sought ways to reduce overall project costs without impacting the quality or durability of the finished bridge and roadway. As a result, the project was completed more than a year ahead of schedule and the client saved $150,000 in CA/CEI expenditures from budget. With this savings the client was able to reinvest in other operational issues within the project limits, including the design and reconstruction of a dangerous intersection. In addition, finishing a year early reduced the time the salmon-bearing stream was exposed to construction risks and that the travelling public was moving through construction zones. The regulatory agencies were very pleased, and the safety risk was reduced for the roadway users.