Route 3 Mill Brook Culvert
The bridge was built in 1953 for the relocated U.S. Route 3, which the state laid out through Billerica in 1952 and 1953 as a four-lane divided highway with limited access, running from Route 128 in Burlington to the Lowell bypass in Chelmsford and bypassing the town centers. Here the highway crosses Mill Brook in South Billerica on a short concrete culvert, counted as a bridge in the state inventory (bridge B-12-019).
In 1993 the Massachusetts Highway Department listed it among twenty Route 3 structures in Billerica, Bedford, Chelmsford, Tyngsborough and Westford that were "Conditionally Not Eligible" for the National Register, each being built after 1940 and of a common type, with the finding to be reviewed when the bridges reached fifty years of age. Unlike most of the Route 3 bridges in town, the culvert was not replaced when the highway was widened in 2001-2005.