NTSB Advisory August 8, 2007 – Update on NTSB Investigation of Collapse of I-35W Bridge in Minneapolis: “…Chairman Rosenker said that NTSB investigators have observed a design issue with gusset plates at particular locations (gusset plates are steel plates that tie steel beams together). Safety Board investigators are in the process of verifying the loads and stresses on the gusset plates at these locations, as well as the materials used in constructing the gusset plates. This information has been shared with the other parties to the investigation, including the Federal Highway Administration.”
House Committee on Transportation and Infrastructure: “A study released by the Bureau of Transportation Statistics in August of 2007 shows that, of 597,340 bridges in the country, 73,784 are structurally deficient. The Department of Transportation (DOT) defines a structurally deficient bridge as one that requires significant maintenance attention, rehabilitation or replacement.”
US Bridge Map: “This site is intended to be a resource for folks who are curious about how safe the road bridges are in their area. The map shows information for over 700,000 bridges located in the 50 States, DC & PR. The Data is current as of 1/1/06 and is from the National Bridge Inventory (NBI)…”
Sabrina is also the solo Editor, Publisher and Founder of LLRX.com® – Legal, technology and knowledge discovery resources on the “moving edge” for Librarians, Lawyers, Researchers, Academic and Public Interest Communities – launched in 1996.