The Isis Balancing Storage is a small earth-filled embankment dam across an unnamed tributary of the Elliott River, located between Bundaberg and Childers in the Wide Bay-Burnett region of Queensland, Australia. Completed in 1986, the impoundment created Lake Gregory, also known as The Duckpond, that was built to provide irrigation water to farmers on the Isis channel system.
The dam wall is high, long, wide at the crest, and holds back when at full capacity. The small reservoir is in area, with an average depth of that draws from a catchment area of .
In 1991, the reservoir was stocked with 80,000 bass and 25,000 Silver Perch. Garfish and eel-tailed catfish occur naturally. Lake Gregory is the closest freshwater storage lake to Bundaberg and is surrounded by the Elliott State Forest. A Stocked Impoundment Permit is required to fish in the dam.