The closure of southbound lanes will extend from 7 p.m. Saturday to 7 a.m. Sunday, to allow replacement of a Brunswick Sewer District line.
Traffic will detour via U.S. Route 1 to Cushing Street, then to Pleasant Street, and back to Maine Street.
Northbound Maine Street travel will be reduced to one lane.
Mill Street will be closed all next week while the sanitary sewer line is replaced all the way up Mill Street to Union Street.
Call the Brunswick Public Works Department for more information at 725-6654.