Lake Julius

Reservoir in North East of Mount Isa, Queensland

20°07′53″S 139°43′23″E / 20.1315°S 139.723°E / -20.1315; 139.723Lake typereservoirPrimary inflowsLeichhardt River, Paroo CreekPrimary outflowsLeichhardt RiverCatchment area4,845 km² (1,871 sq mi)Basin countriesAustraliaSurface area1,255 ha (3,100 acres)Average depth8.9 m (29 ft)Max. depth25.2 m (83 ft)Water volume107,500 ML (3,800×10^⁶ cu ft)^[1]Surface elevation223.54 m (733.4 ft)References^[1]

Lake Julius was formed following the construction of Julius Dam in 1976 for irrigation and town water storage. The dam wall is located just below the junction of the Leichhardt River and Paroo Creek some 70 km (43 mi) North East of Mount Isa. With a catchment area of 4,845 km² (1,871 sq mi) it has a full supply capacity, at a supply level of 223.54m AHD, of 107,500 ML (3,800×10^⁶ cu ft), a surface area of 1,255 ha (3,100 acres) with an average depth of 8.9 m (29 ft).

The dam is unique in Queensland and is a concrete multiple arch and buttress type structure, with the spillway discharging over the tops of the arches. The spillway crest is 18.3 m (60 ft) above bed level. The arch barrels, founded on a triangular arch base, are constructed in independent arch rings and are hinged at buttress springing lines. The spillway is a precast superstructure and the dissipation slab at ground level is post tensioned to the foundation rock.

The dam has had operational volumes ranging between a low of 59.22%, recorded on 24th November 2014, and a high of 169.73%, recorded on 15th January, 2004. The high being due to record breaking rainfall upstream in the Mt. Isa area.^[2]

SunWater is undertaking a dam spillway capacity upgrade program.^[3]

References

^ ^a ^b Sunwater Current Water Storage Information
^ "Julius Dam". Sunwater. Retrieved 30 October 2021.
^ Spillway Capacity Upgrade Program Archived 2008-02-13 at the Wayback Machine

Water supply in Queensland, Australia

Dams and reservoirs by region

South East Queensland	Atkinson Baroon Pocket Biggera Creek Bill Gunn Bromelton Cedar Grove Weir Lake Clarendon Enoggera Ewen Maddock Gold Creek Hinze Lake Manchester Leslie Harrison Little Nerang Maroon Moogerah Mount Crosby Weir North Pine Poona Sideling Creek Six Mile Creek Somerset Splityard Creek Wappa Wivenhoe Wyaralong
Darling Downs	Connolly Cooby Coolmunda Cressbrook Glenlyon Leslie Perseverance
South West Queensland	E.J. Beardmore Neil Turner Weir
Wide Bay–Burnett	Ben Anderson Barrage Bjelke-Petersen Boobir Boondooma Borumba Cania Cedar Pocket Cooloolabin Fred Haigh Gordonbrook Lake Gregory Lenthalls McCauley Weir Meandu Creek Paradise Placer Wuruma
Central Queensland	Lake Awoonga Burton Gorge Callide Fairbairn Fitzroy River Barrage Kroombit Middle Creek Number 7 Teemburra Theresa Creek
North Queensland	Bamboo Burdekin Falls Eungella Gattonvale Offstream Storage Kinchant Paluma Peter Faust Ross River Solomon Teviot Creek
Far North Queensland	Copperlode Falls Ibis Irvinebank Koombooloomba Return Creek Southedge Stannary Hills Lake Tinaroo Wild River
North West Queensland	Lake Belmore Corella East Leichhardt Lake Julius Kidston Lake Moondarra Rifle Creek
Historical	Nindooinbah Tallebudgera Creek

Water resource management by function

Companies and government agencies	Gold Coast Water Queensland Urban Utilities seqwater SunWater WaterSecure
Other sources / facilities	Bradfield Scheme Bundaberg Irrigation Scheme Gold Coast Desalination Plant Mount Crosby Pumping Station SEQ Water Grid Toowoomba Water Futures referendum, 2006 Western Corridor Recycled Water Scheme
Regulators	Department of Energy and Water Supply
Historical	Brisbane Water LinkWater Queensland Water Commission SEQ Water Grid Manager