River S Bridge Replacement

River S Bridge Replacement is a bridge and transportation infrastructure project in Ridgefield, WA. The project replaced the River S Unit bridge at Ridgefield National Wildlife Refuge with a new two-lane structure crossing Lake River and the BNSF rail corridor. Pacific Foundation installed 120-inch and 60-inch drilled shafts from a barge with a Bauer BG55 to depths of up to 132 feet. The replacement bridge removed the former single-lane timber access structure and created a safer two-lane crossing into the River S Unit of the refuge. Pacific Foundation supported the River S Bridge replacement with 10-foot and 5-foot diameter drilled shafts installed from a barge using a Bauer BG55. The scope used temporary casing, vibratory hammers, and slurry to maintain shaft sidewalls for bridge foundations drilled to depths up to 132 feet.