Historic Highway Bridge Closed Indefinitely after Truck Rams into Bridge with the Trailer Set on High.
DALLAS-FT. WORTH/ GLEN ROSE- Less than one week after a historic bridge in Iowa was lost to an overweight truck, another historic bridge may be destined for scrap heap because of another accident. Yet this time, it involved a truck, whose trailer was far too high for the bridge’s overhead clearance.
The Glen Rose Bridge, located over the Brazos River on US Highway 67 between Glen Rose and Ft. Worth, is currently closed to traffic after a trucker travelled through the cantilever through truss structure with a raised loader, tearing through the portal and sway bracings of the bridge before stopping a third of the way through. The vertical clearance for the 1300-foot cantilever Warren structure is 15 feet! The 1947 structure had been renovated in 2009 to accomodate westbound traffic with the east bound traffic serving the newer structure. It is unknown if the loader, which was in a diagonal position at the time of entering the bridge, was raised intentionally, or if there was either technical or driver error. The driver, who was unhurt in the accident, has been cited for driving with an overheight truck across the bridge, yet more dire consequences may be coming for him and the trucking firm as costs for repairs will need to be calculated.
The 70-year old bridge is currently closed to traffic with all westbound traffic being shifted to the newer, eastbound bridge. It is unknown how much work will be needed on the bridge, but officials at Texas Department of Transportation estimate the westbound bridge being closed for up to a year, be it extensive repairs or a full-blown replacement.
This is the second such accident in less than four years. The Skagit River Interstate 5 Bridge collapsed on 23 May, 2013 after a truck struck its portal bracings, causing one span to collapse. It took less than five months to construct a replacement before reopening the bridge, which still serves I-5 in Mt. Vernon, Washington.
While the Bridgehunter’s Chronicles will keep you posted on latest on the Glen Rose Bridge, have a look at the extent of the damage by clicking here. Be careful, the damage may be graphic to some viewers.
The portal bracings are like the red door of the house of the Burnham family in the film American Beauty. Consisting of lattice or letter-style patterns, they are used to support the end posts of the through truss bridge. They once featured interwoven Town lattice bracings with ornamental features with swirls, iron urns and fancy builder’s plaques. Since 1900, they feature letter-shapes, like the A, M, X, and WV. This one has the WA style, the letters representing the state of Washington.
The sway bracings are horizontal overhead bracings that support the truss frames, keeping it intact. Pending on the through truss bridge’s height and simplistic design, they can be single or multi-layered. The Glen Rose has Lattice-style sways, which increases in layers as the driver approaches one of its two towers.