Illinois lake levels

3 lakes, each read from the agency gauge that runs it.

Carlyle Lake USACE St. Louis District

445.16 ft 0.2 ft above full pool — typical for mid-August as of August 15, 2026
Lake Shelbyville USACE St. Louis District

600.93 ft 1.2 ft above full pool — typical for mid-August as of August 15, 2026
Rend Lake USACE St. Louis District

404.84 ft 0.2 ft below full pool — on the low side for mid-August as of August 15, 2026