Do you have any dams on your property? A second question, what dams are in your community (but NOT on your property) that could potentially could affect your operation?
Are dams part of your risk management plan?
Below are a few resources.
National Inventory of Dams Web Site. Using the navigation, you can see the dam statistics by state (numbers, types, year built, purpose, etc.) http://geo.usace.army.mil/pgis/f?p=397:1:0
Dam Owners (Association of State Dam Safety Officials). 65% of the dams are owned privately. A great resource for dam safety. http://www.damsafety.org/community/owners/?p=e9a03866-a7b1-469a-83d8-27122057751a
State Contacts (Association of State Dam Safety Officials). http://www.damsafety.org/community/states/?p=2827bd14-b6e3-49a9-a465-b2a3531afe5c
And trivia. What was the highest number of lives lost due to a dam breach? The Johnstown Flood in 1889. http://en.wikipedia.org/wiki/Johnstown_Flood