I know virtually nothing about 3 Ton Bridge, other than John Stendrini later of Charles Demar, Federale and Rope was in the band. They did a Jawbreaker type of punk that according to John "went over like a lead balloon during the height of the LIHC days."
This is for the only release of the band that I was able to dig up. It's a split 7" from 1994 with a band called Birthrite, who I don't think were from LI.
3 Ton Bridge/Birthrite 7" Split - http://www.mediafire.com/?5l1l2qblxrc1znt