NTSB bridge investigation documents
In its investigation of the 35W bridge collapse, the National Transportation Safety Board prepared over 100 documents. You can find a complete list of the documents on the NTSB Web site.
NTSB interviews with MnDOT's bridge inspectors
Interviews with two members of Sverdrup & Parcell, original 35W bridge design firm
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Photograph of construction materials on the 35W bridge
Statement of Progressive Contractors Inc., the company doing deck work on the bridge at the time of the collapse
MnDOT's Dan Dorgan responds to PCI's statement to NTSB
Wiss, Janney, Elster Associates report on the bridge collapse prepared for MNDot, Nov 2008
GIF animation files indicating how stress hit the under-sized gusset: