Winter (manatee-related) boat speed zone changes by county:

Nov. 15 - March 31

• No-entry and motorboats-prohibited zones - North Indian River area around discharge canals of the Reliant Corp. Power Plant and Florida Power & Light's Frontenac Power Plant.

• Idle-speed zone - West of Intracoastal Waterway in general vicinity of power plants.

Nov. 15 - March 31

• Idle speed - Port Everglades Power Plant area, including part of the discharge canal. Portions of the South New River Canal and Dania Cut-off Canal near the Lauderdale Power Plant.

• Slow speed - Intracoastal Waterway from the Palm Beach County line through Hillsboro Inlet south to Burnham Point. (Note: some portions are weekend-only slow speed.)

• Lower (western) portions of the Withlacoochee River and Bennetts Creek: Sept. 1 - Feb. 28 - 25 mph.

• Lower (western) portions of the Chassahowitzka River: Sept. 1 - March 31 - 25 mph.

• Portions of Kings Bay: Sept. 1 - April 30 - Idle speed or slow speed.

• Portions of the Homosassa River between the Salt River and Trade Winds Marina and southern portion of Halls River: Oct. 1 - April 30 - Slow speed.

• All waters in the vicinity of the Florida Power Corp.'s effluent canal: Nov. 15 - April 30 - Slow speed.

• Within the Blue Waters area of the upper Homosassa River near Homosassa Springs Wildlife State Park: Nov. 15 - March 31 - No entry.

Nov. 15 - April 30

• No entry - Portions of the Biscayne Canal, Little River and Coral Gables Canal.

• Slow speed - Within portions of Meloy (or East) Channel and portions of the Intracoastal Waterway in Dumfoundling Bay and Biscayne Bay between Broad Causeway and Venetian Causeway.

Nov. 15 - March 31

• No entry - Portions of the discharge canal of the TECO Power Plant in Apollo Beach.

• Idle speed - General vicinity of the TECO Power Plant in Apollo Beach.

• Within Sand and Shell islands area, Channel Marker 66 south to Channel Marker 75; Indian River area from Hobert Lodge Marina to North Canal; and from Channel Marker 156 south to St. Lucie County line west of the Intracoastal Waterway: Nov. 1 - April 30 - Slow speed.

• Portion of canal system adjacent to Vero Beach Power Plant: Nov. 15 - March 31 - No entry.

Nov. 15 - March 31

• No entry - Discharge and intake canals of the Florida Power & Light Tice Power Plant.

• Idle speed and slow speed - Portions of the Intracoastal Waterway channel on the Caloosahatchee River in the vicinity of the Tice Power Plant.

• 25 mph - Portions of Estero Bay, Hurricane Bay, Hell Peckney Bay and Hendry Creek.

• Seasonally unregulated - Cayo Costa, North Captiva, Captiva and St. James City areas.

• Year-round no-entry zone - Manatee Springs State Park (manatee protection).

Nov. 15 - March 31

• Motorboats prohibited - Within general vicinity of Florida Power & Light Riviera Beach Power Plant discharge canals.

• Slow speed - Outside the main channel in the Loxahatchee River, and in the north and southwest forks of the Loxahatchee River.

• Idle-speed and slow-speed zones - Look for shore-to-shore speed zone changes north and south of Peanut Island near the Florida Power & Light Riviera Beach Power Plant.

• 25 mph - Portions of the Intracoastal Waterway channel between State Road 706 and Lake Worth, and south of Lake Worth to Broward County.

Oct. 1 - May 31

• 25 mph - Portions of the Intracoastal Waterway channel between State Road 706 and Lake Worth, and south of Lake Worth to Broward County.

Nov. 15 - March 15

• No entry - Portion of Salt Creek and Warm Mineral Springs north of U.S. 41.

• Within Moore's Creek: Nov. 15 - March 31 - Motorboats prohibited.

• Within Garfield Cut/Fish House Cove area: Nov. 15 - April 15 - Slow speed.

• Within Intracoastal Waterway channel between North Beach Causeway south to Channel Marker 189 and within the Shark Cut Channel in the Fort Pierce Inlet area: Nov. 15 - April 30 - Slow speed.

Sept. 1 - March 31

• 25 mph - Portions of the Tomoka River and Spruce Creek.

Oct. 15 - April 15:

• Blue Spring Run - Motorboats prohibited.

• St. Johns River, south of Lake Beresford to Channel Marker 67 - Slow speed.