The Coolmunda Dam is an earth–fill embankment dam with a gated spillway across the Macintyre Brook, a tributary of the Dumaresq River, that is located on Darling Downs in Coolmunda, Goondiwindi Region, Queensland, Australia. The main purposes of the dam are for irrigation and potable water supply. The impounded reservoir is called the Lak…The Coolmunda Dam is an earth–fill embankment dam with a gated spillway across the Macintyre Brook, a tributary of the Dumaresq River, that is located on Darling Downs in Coolmunda, Goondiwindi Region, Queensland, Australia. The main purposes of the dam are for irrigation and potable water supply. The impounded reservoir is called the Lake Coolmunda.