Thanks to Jay Sheppard for passing this along:
From the Army Corps of Engineeers:
There will be a whitewater release from Savage River Dam this Sunday (July 1). The release will be from 9 AM until 3 PM with a release rate of about 1000 cfs. We will begin increasing flow at about 7 AM and, at the end of the event, we will reduce the flow to about 55 cfs by 5 PM. There will also be a slight increase in flows (about 175 cfs) on Thursday from 10 AM until 1 PM to aid the sponsor in identifying any potential hazards in the river so that they can be removed prior to the event on Sunday.
Water Control Team
USACE - Baltimore