Barnard recently completed a Preconstruction Services Contract in which we assisted the City of Lake Oswego and Brown and Caldwell in planning for and design of a new in-lake interceptor sanitary sewer. The system will traverse the length of Oswego Lake in the heart of the City of Lake Oswego, near Portland, Oregon. Oswego Lake is a privately managed and operated lake around which this city has been located. The lake is owned by 700 lakeside property owners who use it for recreation. The new system will replace roughly 7,000 LF of direct-bury and pile-supported trunk sewer pipe and manholes installed primarily in the 1960s that do not meet current seismic performance standards and can no longer handle peak wet weather flows without overflowing into the lake. The new sewer pipe and manholes will be buoyant yet submerged 14 to 21 feet below the lake surface. In addition, the system will include nearly 2,000 LF of on-shore 36-inch-diameter sewer pipe within public rights-of-way and easements, and installation of seismic bracing on 31 cast-in-place concrete elevated piers, among other aspects of the project.