Morrison Bridge Lift Span Deck Replacement
Start Date: March 2017
End Date: October 2017
This project involves replacing the existing fiber-reinforced polymer (FRP) panel deck on the Morrison
Bridge’s bascule lift span over the Willamette River. Our team is replacing the span with a steel grid/pan deck that will be partially filled with lightweight concrete. We will add approximately 850,000 pounds of steel counterweight plus another 75,000 pounds of precast block counterweight to account for the new, heavier deck. The crew is also rehabilitating and strengthening the trunnion bearings on the lift span including steel repairs and retrofitting existing steel rail across the lift span.