Bull Run Dam Tower 2 Improvement Project

Project Details

Prime Contractor: Advanced American Construction
Owner: City of Portland Water Bureau
Location: Sandy, OR | February 2012 – December 2014

AAC was the CM/GC for multiple phases to modify the north and south intake towers at Bull Run Tower 2 to improve fish habitat within the Bull Run River system. Modifications included installation of a selective withdrawal system on the north tower, new mechanical and electrical operating systems, water quality monitoring equipment, site civil improvements, and fish flow piping.

The pristine Bull Run Watershed is the source of drinking water for the City of Portland, so special care had to be taken throughout this project to ensure that water was not contaminated. The total contract value on this project was more than $30 million.

AAC won the AGC/Alliant 2014 Build America Award and the Daily Journal of Commerce 2014 Top Projects Award for the Bull Run project.

Project Highlights

250-foot long temporary work trestle
1,600 cubic yards of sediment removal
Install underwater concrete block revetment system
Concrete demolition
North Tower structural steel wet well and slide gates
Install pre-engineered electrical building
Mechanical and electrical systems installation
Fish flow piping installation
Over 14,000 AAC diver hours to complete the work. Drilled shaft, tangent pile wall, and secant pile wall installation. Steel piping installation up to 96″ diameter