MONROE — The antiquated Route 34 bridge positioned atop Stevenson Dam on the Housatonic River, which links Monroe to Oxford, will be closed to traffic for a 90-hour period to allow for maintenance work on the hydroelectric dam, which has been in service for nearly a century.

The bridge atop the dam will be closed to traffic starting at 6 am on Saturday, May 2. It is scheduled to reopen to traffic at 12:01 am on Wednesday, May 6. Traffic will be detoured using Route 111, Route 110, and Bridge Street in Shelton.

Long-distance traffic is advised to use Route 8 and Interstate 84 to avoid the bridge at Stevenson Dam while maintenance work is underway.

Many Newtown motorists use the Route 34 bridge in traveling to and from the New Haven area.

If the maintenance work is completed sooner than planned, the bridge would be reopened to traffic sooner than is scheduled.