It’s important to maintain safe dam infrastructure
The importance of maintaining safe dams is highlighted for National Dam Safety Awareness Day, which was May 31. Dams are an essential part of the infrastructure in the United States, with over 90,000 dams across the country, including about 3,000 in Wisconsin.
Proper management and maintenance of dams is vital, to the public and customers associated with each dam.
The issue of dam safety was not widely recognized until 1889, when the failure of South Fork Dam near Johnstown, Pa., claimed more than 2,200 lives, resulting in the worst dam failure in United States history. National Dam Safety Awareness Day was established to commemorate this tragic failure, and encourage people to recognize the responsibility to maintain safe, operational dams.
Many of the dams in Wisconsin, were built in the late 1800s and early 1900s. Over time, water pressure and weathering slowly break down a dam. If left unmaintained, dams pose an increased risk to life and property, making problems such as sudden breaks more likely during flood conditions.
Dams in Wisconsin may be owned by private individuals, municipalities, lake districts or federal agencies. The DNR owns about 300, most of which provide recreational opportunities, like fishing, hunting and boating. When recreating around a dam, it’s important to maintain a safe distance and use designated portage areas, if one is available.
The most common problems found during dam inspections, are undesirable woody vegetation on the embankment, deteriorated concrete, inoperable gates and corroded outlet pipes.
The DNR Dam Safety Team provides technical assistance to Wisconsin dam owners. This support includes conducting and reviewing inspections; identifying risks at dams; responding during emergencies; and reviewing dam repair plans.
The Association of State Dam Safety Officials estimates that the cost to rehabilitate the nation’s non-federal high hazard dams or those whose failure could cause loss of life, exceeds $157 billion. Rehabilitation is an integral part of maintaining or improving the safety of dams.
The Wisconsin DNR provides dam repair and removal grants to assist owners with making their dams safer. If someone owns a dam, and has questions or concerns about its status, contact DNRDamSafety@wisconsin.gov.
