The U.S. Army Corps of Engineers, also known as COE, plan, develop, and maintain many of our rivers, dams, and other waterways within the USA. Much of their work focuses on flood control, conservation, and recreation.

https://northeast-truckcampers.org/coe-camp-campgrounds/

To put it in perspective, a visitor to COE recreation areas would find that there are:

• • COE campgrounds in 43 states
  • 92,588 campsites
  • 3,754 boat ramps
  • 55,390 miles of shoreline