This in from Notify NYC:
Notification issued 8/23/13 at 12:00 PM. As part of the ongoing New York City Department of Transportation (DOT) project to rehabilitate the Brooklyn Bridge, a full closure of the Manhattan-bound lanes of the bridge will be required for 36 consecutive hours this weekend, from 12:01 AM Saturday, 8/24 until 12:00 PM Sunday, 8/25. During this closure, all Manhattan-bound traffic will be redirected to alternate crossings, including the Manhattan Bridge, Williamsburg Bridge and the Brooklyn-Battery Tunnel, an MTA-tolled facility.
There’s more info on the DOT website.