The break happened at the Robertson Street Overpass above the Expressway, which is also Interstate 93.
The break occurred on the East Milton Square overpass, according to highway officials.
NBC Boston on MSN
Water main break on overpass spills water onto I-93 in Quincy
An apparent water main break in Quincy, Massachusetts, created a waterfall on Interstate 93 overnight. The watery mess happened at the Robertson Street overpass near Exit 9. Video from the scene shows ...
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