Multnomah County needed to replace the 87-year old Sellwood Bridge crossing the Willamette River in Portland, Oregon with a new seismically-sound structure. This bridge is the busiest two-lane bridge in the state of Oregon.
McCallum Rock Drilling was a subcontractor on this project. Drilling and blasting was located adjacent to the existing Sellwood Bridge on OR 43 to widen the roadway for the new OR 43/Sellwood Bridge intersection.