One highly visible icon has emerged from the Big Dig project. The new bridge (the name itself a compromise between the civil rights activist and the Charlestown landmark) may be considered as a symbol of the beginning of the new millennium. Cited as the widest cable-stayed bridge (load-bearing, radiating from masts to support points on its deck), its 1,500-foot-long main span is of steel, with concrete in the back spans; there is a 700-foot span between the two towers. Inverted Y-shaped towers support 116 cables that anchor the span of the ten-lane bridge to land-based back spans. But, alas, the bridge is only a visual tour-de-force, for vehicles only, connecting the new freeway running under downtown Boston to Charlestown and the north: the bridge at the end of the tunnel.
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Leonard P. Zakim Bunker Hill Bridge
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