The Milldam was a dam which formerly blocked Mill Brook in Concord, Massachusetts, United States, near the intersection of today's Main Street and Monument Square.
Originally the site of an American Indian fishing weir, [1] in 1635, English settlers established a village beside lower Mill Brook, with a dam, pond and mill being built the following year at the Milldam. A road (Main Street) was built across the dam in 1742. [2] [3] Before 1739, a diversion of water between Elm Brook and Mill Brook occurred. [3]
The Milldam pond was drained in 1828, with the dam and mill buildings demolished. Main Street was widened shortly thereafter and covered in crushed stone by the early 1880s. [3]