Photo: Oregon Military Dept

Camp Withycombe Armed Forces Reserve Center

Photo: SCOTT THIBERT

Balch Consolidation Conduit Shafts & Pipelines

9. Camp Withycombe Armed Forces Reserve Center

PROJECT COST: $65-68 Million

Started: June 2009
Target Completion: August 2011
Owner: Oregon Military Dept.
Design Firm: Barrentine Bates Lee
General Contractor: Hoffman Construction
Engineers: KPFF Consulting Engineers; Glumac Engineers
Landscape: Walker Macy
Subcontractors: AAPEX International Development Group; Coffman Excavation; Davidson’s Masonry; Rosendin Electric; R.F. Stearns Inc.; Crossfire Sprinkler Co.

This 35-acre Clackamas site will be home to approximately 1,300 members of the Oregon National Guard and U.S. Army Reserve. The 250,000-sq-ft center will include administrative space, classrooms and storage space. It is dedicated to the memory of the 41st Infantry Division, renowned for their service during WWII.

10. Balch Consolidation Conduit Shafts & Pipelines

PROJECT COST: $60.7 Million

Started: August 2009
Target Completion: December 2011
Owner: City of Portland, Bureau of Environmental Services
General Contractor: James W. Fowler Co.
Civil Engineer: Kennedy/Jenks Consultants

This 8,500-ft pipeline will carry combined sewage and stormwater runoff from the Balch Drainage Basin to the West Side Big Pipe for conveyance to the Columbia Boulevard Wastewater Treatment Plant. The contractor is using two microtunnel boring machines to construct the conduit’s 54-in. and 84-in. diameter pipes at depths of 30 to 70 ft below Northwest Portland. For the first time in Oregon, a Cutter Soil Mixing Machine is being used to construct the walls of four tunnel access shafts.