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A causeway has existed at Briassé since at least the 15th century. It operated a mill on the left bank. It was fitted with a lock gate after 1537. The canalization of the Mayenne led to its demolition and the construction in its place of a lock dam, the plans for which, drawn up by the Ponts et Chaussées engineer Du Jardin, were approved by the minister on 4 April 1865. The work, postponed during the 1870-1871 war, was awarded at a second tender on 15 July 1872 to the Souzay contractor René...
