Washington Aqueduct crews will be conducting repairs to deteriorated sections of the utility's First Conduit, commonly referred to as the "Old Conduit", located under MacArthur Boulevard in Montgomery County, Maryland, starting late November 2023. Repair work will take place Monday-Friday, 7:00 a.m. to 5:30 p.m., at various locations along the conduit which may result in lane closures along MacArthur Boulevard.