Tag Archives: bridge collapse

A (Collapsed) Bridge Too Far

The liberal political site Daily Kos maintains an infrastructure series; recently it posted an entry titled “Another Week, Another Bridge Collapse in America.”

This past Monday, news came of another bridge collapse in the United States, this time in Chattanooga. The fact that a bridge collapse has to be qualified with the determiner ‘another’ in the richest Country the World has ever known is distressing, even more so considering said bridge was also part of the largest infrastructure project the World has ever know.

Late Monday morning, the side of an overpass on I-75 collapsed, tumbling onto the ramp headed to Chattanooga. This bridge had been built in the 1950’s, and was recently inspected in July 2018. The condition of the bridge was found to be ‘Fair,’ which sounds more like a weather report than something very large that can collapse and kill you.

This particular collapse was evidently caused by an oversized truck that had slammed into the bridge and weakened it. But nationwide, the number of structurally-deficient bridges is staggering; assuming funding at current rates, engineers estimate that it will take 82 years to repair all of them.

The American Road and Transportation Builders Association has issued a report based upon 2018 data. It shows

  • There are 616,087 bridges in America
  • Of those, 47,052 (nearly 8%) are “structurally deficient” and need urgent repairs
  • 235,020 bridges (38%) need some sort of repair
  • Americans cross structurally deficient bridges 178 million times a day, including such landmarks as the Brooklyn Bridge and the San Mateo-Hayward Bridge over the San Francisco Bay
  • The average age of a structurally deficient bridge is 62 years

Structurally deficient doesn’t necessarily mean that the bridge is in imminent danger of collapse, but it also isn’t a label affixed to bridges with minor problems. The post included the definition used by Virginia’s Department of Transportation:

Bridges are considered structurally deficient if they have been restricted to light vehicles, closed to traffic or require rehabilitation.Structurally deficient means there are elements of the bridge that need to be monitored and/or repaired. The fact that a bridge is “structurally deficient” does not imply that it is likely to collapse or that it is unsafe. It means the bridge must be monitored, inspected and maintained.

More than 1200 bridges in the state of Indiana are considered structurally deficient.

The Daily Kos post links to a list of the bridges in the worst shape. As the list makes clear, the worst bridges are exclusively urban interstate bridges.

Why are highway bridges in urban areas the most dangerous of all in America?

  • Decades of neglect of urban infrastructure by state and federal authorities who feel taxpayer dollars are better spent on rural and suburban constituents. (Thanks to gerrymandering, this is the case in Indiana.)
  • Lack of public transportation, or overcrowding of public transportation, forcing these structures to carry far more vehicles than they were ever designed for.
  • Replacing these structures in an urban environment, where service cannot be interrupted and there is no available real estate to build a new bridge alongside, is extremely costly.

When you think about it, governments exist to provide infrastructure–not just physical infrastructure, but also the social infrastructure that prevents what Hobbes called “a condition of war of everyone against everyone.”

When a government can’t even sustain the physical infrastructure, it is a failed government.