Water levels can change quickly downstream of a hydroelectric dam. There may be releases through spillgates, or off-line generators can be brought into service almost instantly. Both can be dangerous if you are in the wrong place.

If you're downstream of a dam, keep alert. Be prepared to leave the water quickly. If you're caught in rising water, stay calm and move diagonally across the current until you reach safety.

If you become trapped on an island that's not likely to become submerged, stay there and signal for help, rather than trying to swim or wade across the river.

Here are some additional precautions you can take to stay safe around dams:

• Look up for overhead power lines when raising a sailboat mast. Stay clear of any area beneath overhead power lines.
• Check the local weather before launching your boat.
• Watch for submerged objects. Don't dive, swim or wade without first checking for underwater hazards.
• Wear a Coast Guard-approved personal flotation device or a life jacket when boating or using fishing waders.
• Enjoy the reservoir system, but remember to play it safe at all times when you're in or near the water.

Safety Measures
Most Idaho Power dams have sirens and strobe lights that signal when dam spillways are about to be opened. If you hear or see one of these warning signals, immediately leave the area downstream of the dam or the spillway.

Buoy lines and cables with warning signs are there to keep boaters and swimmers at a safe distance from our dams. Don't cross, tie up to or go under these lines.

Don't climb over protective fences near spillways, dams and substations. They're there to keep you safe. Click for more boating safety information.