Talbingo Dam, in 2005.
|Location||Snowy Mountains, New South Wales|
|Dam and spillways|
|Type of dam||Embankment dam|
|Height||162 metres (531 ft)|
|Length||701 metres (2,300 ft)|
|Dam volume||14.488 million cubic metres (511.6×106 cu ft)|
|Spillway type||Concrete chute|
|Spillway capacity||4,290 cubic metres per second (151,000 cu ft/s)|
|Total capacity||921,400 megalitres (32,540×106 cu ft)|
|Catchment area||1,093 square kilometres (422 sq mi)|
|Surface area||1,935.5 hectares (4,783 acres)|
|Maximum water depth||110 metres (360 ft)|
|Hydraulic head||150.9 metres (495 ft)|
|Installed capacity||1,500 megawatts (2,000,000 hp)|
Talbingo Dam is a major ungated rock fill with clay core embankment dam with concrete chute spillway across the Tumut River upstream of Talbingo in the Snowy Mountains region of New South Wales, Australia. The dam's main purpose is for the generation of hydro-power and is the largest of sixteen major dams that comprise the Snowy Mountains Scheme, a vast hydroelectricity and irrigation complex constructed in south-east Australia between 1949 and 1974 and now run by Snowy Hydro. The impounded reservoir is called Talbingo Reservoir.
Location and features
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 920,000 megalitres (32,000×106 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-storage hydroelectric power station, that has six turbine generators (3 of which double as the station's water pumps) with a total 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, which flows into the station from 6 large pressure pipes (one for each turbine) from a concrete inlet structure at the edge of the reservoir, built about midway between the proper Talbingo dam and its spillway. The inlet structure can be mistaken by tourists for being the main dam, due to being a far more conspicuous sight from the road that leads into the Talbingo Dam/Tumut 3 complex. The pumps draw 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 power generated at Tumut 3 serves both New South Wales and Victoria.
- Hume and Hovell Track
- List of dams and reservoirs in New South Wales
- Snowy Hydro Limited
- Snowy Mountains Scheme
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