
Cowan Lake: There Are Twenty Burial Mounds at the Bottom of This Lake
August 27, 2026
In 1950 Ohio closed a dam on Cowan Creek and flooded a valley holding more than twenty Adena burial mounds. Archaeologists had time to excavate exactly one. On the other side of that same dam, the spillway is packed with 445-million-year-old sea creatures you can pick up off the ground.












