Bosher's Dam - Credit: Wikimedia Commons
Bosher's Dam is a historic low head dam (also called a weir) built upon the James River just west of Richmond, Virginia. It is a 12-foot-high stone structure which interrupts the natural flow of Virginia's largest self-contained river by spanning the waterway between suburban Tuckahoe in Henrico County and the western part of Richmond just west of the Edward E. Willey Bridge. Dams like Bosher's Dam are often referred to as "drowning machines" by paddlers due to their dangerous nature. Bosher's Dam is not an exception from this rule having caused a number of deaths. Read more on Wikipedia
Source: en.wikipedia.org