Commenced in 1968 and completed in 1971, Talbingo Dam is a major dam on the Tumut River, within the Snowy Mountains, approximately 5 kilometres (3.1 mi) south of the village of Talbingo. The dam was constructed by Thiess Bros Pty Limited and, at the time, the project was the largest dam ever built in Australia. The dam is the largest and last of the sixteen dams completed as part of the Snowy Mountains Scheme.
The dam wall comprising 14,488,000 cubic metres (511,600,000 cu ft) of rockfill with an upstream sloping silty clay core is 162 metres (531 ft) high and is 701 metres (2,300 ft) long. At 100% capacity the dam wall holds back 36,400 megalitres (1,290×10^6 cu ft) of water at an average depth of 70 metres (230 ft). The surface area of Talbingo Reservoir is 1,935.5 hectares (4,783 acres) and the catchment area is 1,093 square kilometres (422 sq mi). The spillway is capable of discharging 4,290 cubic metres per second (151,000 cu ft/s).
Directly downstream of the dam wall is Tumut 3, a pumped-storagehydroelectricpower station, that has six turbinegenerators, with a generating capacity of 1,500 megawatts (2,000,000 hp) of electricity; with a net generation of 812 gigawatt-hours (2,920 TJ) per annum. The power station has 150.9 metres (495 ft) rated hydraulic head. A pumping station at Tumut-3 draws water from Jounama Pondage at the rate of 297 cubic metres per second (10,500 cu ft/s), returning water to Talbingo Reservoir for later generation use in periods of peak-demand. The water comes down the hills in six pressure pipe lines and production of electricity is maximised by pumps in the power station which pump water back up the hill to Talbingo Reservoir during off peak periods. The power generated at Tumut 3 serves both New South Wales and Victoria.
^Adikari, G. S. N.; Parkin, A. K. (1982). "Deformation behaviour of Talbingo Dam". International Journal for Numerical and Analytical Methods in Geomechanics6 (3): 353–382. doi:10.1002/nag.1610060307.|accessdate= requires |url= (help)