Step 1: Crews remove the south side of the bridge deck while traffic continues on the north side of the bridge.
Step 2: Bridge piers and supports are removed on the south half of the bridge so crews can rebuild the south half of the bridge.
Step 3: Piles and concrete piers provide the support for the bridge. Piles or H-beams are driven approximately 17-feet into the ground (on this project) until they reach bedrock. Crews then assemble the pier’s form around the H-beams. This form is filled with concrete to form the pier. The first concrete pier shown above has been poured and the H-beams are visible at the top of the form. The second pier form has been built and is ready to be poured.
Next, Crew members stand atop the pier form preparing to pour concrete for the pier using a drop bucket.
Step 4: Crews have poured the concrete for the pier and have begun to place beams as part of the falsework that will become the bridge’s deck. Falsework is a temporary structure that, along with forms, will hold the liquid concrete that becomes the bridge’s deck until the concrete is set, cured and strong enough to support itself.
Above: A Bridges Inc. crew member wraps the freshly poured pier in a “blanket” to protect it from the below-freezing temperatures expected overnight.