A couple of weeks ago, a story in the Pittsburgh Post-Gazette by Jon Schmitz, "Pennsylvania bridges better, but still need work", caught my eye. The article mentions how in the last three years the number of "structurally deficient" bridges in Pennsylvania has dropped by 1,100. Before you breathe easy, that still leaves about 4,500 in the Commonwealth that need some TLC ("structurally deficient...does not mean they are unsafe but that they are showing signs of deterioration that, if unaddressed, could lead to weight limits or closings").
Later in the article, Mr. Schmitz points out that one of the most important bridges in the Pittsburgh area is on the needy list:
One of the biggest bridges on the deficient list, the Liberty Bridge in Downtown Pittsburgh, is in need of rehabilitation that will cost an estimated $40 million to $60 million, he said. Final design of the project is expected to begin this year but construction funding is not yet available. More than 16,500 vehicles use the bridge on an average day.
The bridge superstructure is marred with patches of rust and there are areas of corrosion and deterioration in the steel, but Mr. [Dan] Cessna said the span is safe. It is currently undergoing an in-depth inspection.
The best-case scenario has rehabilitation starting in 2015 if funding becomes available. The department will make interim repairs as necessary until then, Mr. Cessna said.Dan Cessna is the executive of Pennsylvania Department of Transportation District 11, comprising Allegheny, Beaver, and Lawrence counties. Everybody in Pittsburgh knows the Liberty Bridge, the tunnels that join the bridge to pass under Mount Washington, the lengthy traffic jams during rush hours on both, and what a complete pig's breakfast transportation around here would be if the bridge failed or had to be closed for safety reasons. $40-60 million seems like a bargain to keep the bridge safe and sound. But is it?