Lowhead dams, some from the late 1800s, can be found across North Dakota. These simple concrete or rock masonry dams were built for various reasons including town water supplies, irrigation, livestock use and recreation. The problem with these dams is that the water flowing over them can cause strong recirculating currents on the downstream side which can trap and drown people. Learn more about these dams and what can be done to mitigate their danger in this week’s webcast.