Lake Hico was a cooling pond reservoir built on 16th section school land in Jackson, Mississippi, in the 1950s.
The reasons why it was finally closed to the public were 1- the Barnett Reservoir opened and most people who had formerly used the lake went there and 2- the liability costs to MP&L skyrocketed after there was a couple of drownings.
The fact that integration of such public spaces was being attempted by some and resisted by others in Jackson, Mississippi at the time is possibly pertinent.
The lake is leased to Entergy, the operator of the Rex Brown Plant, by its owner, the State of Mississippi via its trust for 16th section lands.
The lake was home to the Jackson Yacht Club, until the much larger Ross Barnett Reservoir was built in early 1960s.
According to Mississippi Today, in September 2020, JPS directed Entergy to drain the lake and breach the levee between the "hot" and "cold" sides.