Ouachita-Black Rivers (Calion Pool) — H. K. Thatcher Lock And Dam Recreation Area

H. K. Thatcher Lock And Dam Recreation Area is a US Army Corps of Engineers recreation area within Ouachita-Black Rivers (Calion Pool). The Corps manages 400+ lake and river projects nationwide, making it one of the largest federal providers of outdoor recreation. It is managed directly by the US Army Corps of Engineers as part of the agency's Civil Works recreation program. Camping rules, fees, and seasonal closures vary by site — verify current operations with the managing district before any visit.