On May 19, 2016, an over-height vehicle travelling westbound on Northwest Expressway in Oklahoma City impacted the exterior beam in Span 3 of the May Avenue Bridge, causing partial collapse of that span. The bridge and road below were immediately closed to traffic in all directions until the damaged section and debris could be removed and an evaluation of the remaining structure could be completed.
Representatives from Olsson Associates were on-site within an hour after the incident and performed an assessment of the bridge to ensure the safety of the driving public. Olsson Associates assisted the city in advising Cimarron Construction on how to demolish the collapsed bridge to best preserve the remaining structure. Removal of the damaged portions began on May 20 and was completed May 21. During the afternoon of May 21, Olsson Associates performed a thorough visual inspection of the bridge structure for any damages from the collision and found the southbound lanes to be safe to open to traffic.
Because of the location of the project, and because of the importance of both Northwest Expressway and May Avenue to the surrounding community, the demolition and repair efforts needed to be done quickly and efficiently with as little impact to the local community as possible. The city requested that the damaged bridge span be replaced and look similar to the original structure. With this in mind, and in an effort to keep repair time and construction costs down, Olsson directed Cimarron Construction to salvage and reuse the original ornamental railing.
In addition to allowing limited traffic on the bridge during reconstruction, a temporary crossover was constructed to detour westbound traffic on Northwest Expressway on the eastbound lanes. Because of this, local traffic was only slightly impeded during repairs. Repair construction plans were completed and submitted to the city within a week of the initial damage, after which the project was awarded to the low bidder, Cimarron Construction Company. Final inspection was performed on July 22, 2016, and both May Avenue and Northwest Expressway returned to normal operations.