The Highway 19 bridge near Hakalau, also known as the Umauma Bridge, is a beautiful, old wooden structure that has recently received some much-needed TLC. The bridge was labeled structurally deficient in 2007 due to corrosion of the steel truss towers and the state of Hawaii went to work to strengthen the supports and retrofit the bridge against earthquakes. Lanes were also widened to accommodate vehicular traffic.
The 278-foot span, near the 16-mile marker, was originally built in 1911 to support railroad tracks over the Umauma Stream. The underlying structure, unseen by the thousands of drivers who pass over it daily, is comprised of two rusting steel towers supporting six spans of riveted steel plate girders.
A story in the Hawaii Tribune-Herald a few years ago noted that " -- if you look underneath, (the bridge) is in need of extensive repair. It's been a concern," said state Rep. Mark Nakashima, D-Hilo-Hamakua-Kohala. "Initially, because that bridge does not have any alternate route around it, they (the state) will repair the bridge in place." This made for some major traffic problems and delays in the area, according to the tour guide who drove our group through the area in March 2015.
The bridge is "110 feet tall, 38 feet wide and is described as "historically significant, due to its association with the Hilo Railroad Co., which played a major role in the development of the Hamakua sugar plantations and as one of the few remaining steel girder and trestle bridges that represent the work of John Mason Young," said the Tribune-Herald. Umauma Bridge is a historically representative example of early 20th-century engineering technology, as well as a source for information about early 20th-century steel manufacture and construction.
The work done will rehabilitate the old bridge while satisfying state historic preservation requirements and bring the bridge up to current federal highway safety standards.
The area near Hilo where the Bridge is located is awash in tropical greenery and waterfalls.
It receives plentiful rainfall and that must be hard on wooden bridges. Very happy that the work on the bridge is soon to be completed and Big Island residents can safely travel in this gorgeous area once again.
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