The Leonard P. Zakim Bunker Hill Memorial Bridge was the widest cable-stayed bridge in world at 183 ft (55.7m) when it opened in 2003 as part of the "Big Dig" project. It serves as the northern entrance and exit to the city of Boston and terminates at the entrance to the Thomas P. "Tip" O'Neill Jr. Tunnel. The two towers are built to represent the Bunker Hill Monument that stands close-by in Charlestown. It provides a total of 8 lanes of north-south traffic plus an additional 2 lanes of an access ramp that is attached via a cantilever connection.
Length of largest span: 745.0 ft.
Total length: 1,432.0 ft.
Deck width: 183.0 ft.
Bunker Hill Bridge
Approximate latitude, longitude
+42.36875, -71.06319(decimal degrees) 42°22'07" N, 71°03'47" W (degrees°minutes'seconds")
Approximate UTM coordinates
USGS topographic map
MA B16600 (Massachusetts bridge number)
BH 39928 (Bridgehunter.com ID)
Inspection (as of 10/2011)
Deck condition rating: Good(7 out of 9) Superstructure condition rating: Good(7 out of 9) Substructure condition rating: Good(7 out of 9) Sufficiency rating: 79.0 (out of 100)