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My office, the New Hampshire SHPO, has begun to apply Guidelines for Historic Bridge Rehabilitation and Replacement to an actual bridge project over the Connecticut River between NH and Vermont. The bridge is a three-span truss structure (two high trusses, one pony) dating from 1937. We have found the...
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MoDOT boasts historic bridge is first to go with stimulus funds “Missouri is the first state in the nation to begin construction on highway projects funded by the Economic Recovery Act. The minute President Obama signed the economic recovery bill, MoDOT went to work to replace one of the state’s...
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After all the succesful rehabilitations of historic bridges that have been accomplished during the past 30 years or so we still hear from many bridge owners that "the bridge is old, has exceeded its useful life and needs to be replaced". Now with the tragic collapse of the I35 W. bridge in...
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There is no agreement as to conditions under which truss bridges may continue in vehicular use. The collapse of 35W and heightened concern about fracture critical bridges carrying traffic complicates this. What width, load capacity, geometric and railing standards are acceptable under what circumstances...
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I tend to agree that 'purists' represent one end of the spectrum and that their adherence to fixed ideology can hinder a project. One example is the Texas SHPO wanting to preserve a guardrail made of gas pipe fittings that was 85% destroyed by corrosion. But the other end of the spectrum is occupied...