River Hazard - DAM at City of Dayton Wellfield - Mad River Mile 4.1

Low dams – like natural waterfalls – are deceptively calm and can be incredibly dangerous. Low dams may range from a 25-foot drop-off to a mere 6-inch drop off. Water flowing over the dam forms currents that can trap objects (and you). Backwash and re-circulating current can trap you back against the dam then underwater before you are pushed along the bottom only to be sucked back to the dam as you rise to the surface. This circulating motion repeats over and over again. The backwash currents may even suck you in if you approach too closely from downstream of the dam.

Low Dam Safety Tips

• Know the location of all low dams and waterfalls on the river that you plan to boat.
• NEVER attempt to boat over a dam or waterfall.
• Portage (carry) your boat around a low dam and launch a safe distance, well downstream of the backwash of the low dam.
• Scout the river and know the location of hazards. Talk with boaters who are familiar with the river to gain additional knowledge.
• Boat with experienced, responsible boaters and learn from them.
• Watch for a smooth line connecting the banks. This may be the top of a low dam.
• Listen for the splashing sounds of turbulence and the dangerous currents at dams.
• Look for concrete retaining walls, which some dams have at each bank, making the dams easier to spot.

It is nearly impossible to escape the force of a low dam’s currents. Unless you are trained in low dam rescues, never enter the water in an attempt to rescue someone trapped by a low dam. Immediately call for help, then throw a line from shore to the trapped person. Untrained rescuers should never approach the top of the dam or the backwash below the dam, even in a boat. The turbulence at the dam will easily capsize a boat. Low dams can be deadly and should always be avoided.