Just in from the IDNR:

Rising Water Leads to Restricted Boating on
Rock River

No recreational watercraft allowed until further notice

SPRINGFIELD - Due to rising water, swift currents and floating debris, the Illinois Department of Natural Resources is restricting boating on the Rock River in Lee, Ogle and Whiteside Counties. This restricted area is off limits to all recreational watercraft until further notice. IDNR has authorization to designate restricted boating areas when navigation is deemed significantly hazardous.