The new $95 million Lake Oswego Interceptor Sewer (LOIS) is a 13,000 ft. floating sewer HDPE pipeline that lies submerged 14 to 21 feet below the surface of Lake Oswego.

Pinnell Busch was hired to assist the City of Lake Oswego, as well as Brown and Caldwell’s design and construction team.  We had many roles to play during design and construction, including: planning and scheduling, developing engineering cost estimates, reviewing the contractor’s monthly schedule updates, change management and claims assistance.

During the design-development phase, Blake Marchand assisted the design team to prepare and update the master schedule. He and Dennis Van Kirk worked closely together to develop cost estimates for the raw water and finished water pipelines, relying on the engineers to provide much of the information for the many alternatives, including alignments, sequence of work, access, staging, restrictions, dewatering, barge work and bypass pumping. Steve Pinnell and Blake continued to work with the construction management team during each phase of the work on change management and claims assistance.

Congratulations to everyone involved for making this such a successful project.  The project finished on time and under budget in June 2011.

For more information, click here.