Coordinates: 45°10′46″S 169°18′25″E / -45.179314, 169.306955 Map of Earth showing lines of latitude (horizontally) and longitude (vertically), Eckert VI projection; large version (pdf, 1. ...

Clyde Dam
Clyde Dam from the east, looking west
Official name	Clyde Dam
Impounds	Clutha River
Creates	Lake Dunstan
Locale	Central Otago,  New Zealand
Maintained by	Contact Energy
Length	490m[1]
Height	100m (lowest point)
Width (at base)	70m (base) 10m (crest)
Construction began	1977
Opening date	1989 (generation commissioned 1992)

The Clyde Dam is New Zealand's third largest hydroelectric dam, and is built on the Clutha River, near the town of Clyde. Image File history File links Download high-resolution version (1191x479, 193 KB) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Clyde Dam Think Big Lake Dunstan Talk:Think Big Wikipedia:Featured pictures candidates/January-2006 Wikipedia:Featured picture... The Clutha River system The Clutha River is the second longest river in New Zealand and flows south-southeast for 340 kilometres through Central and South Otago to the Pacific Ocean, 75 kilometres south west of Dunedin. ... Lake Dunstan is located in the South Island of New Zealand. ... The area known as Central Otago in Otago, New Zealand, includes the middle of the region but generally also most of the north-western portion (the Queenstown-Lakes District). ... Image File history File links Flag_of_New_Zealand. ... Contact Energy is a New Zealand electricity generation and electricity retailing company. ... Also: 1977 (album) by Ash. ... Year 1989 (MCMLXXXIX) was a common year starting on Sunday (link displays 1989 Gregorian calendar). ... Hydroelectric dam diagram The waters of Llyn Stwlan, the upper reservoir of the Ffestiniog Pumped-Storage Scheme in north Wales, can just be glimpsed on the right. ... The Clutha River system The Clutha River is the second longest river in New Zealand and flows south-southeast for 340 kilometres through Central and South Otago to the Pacific Ocean, 75 kilometres south west of Dunedin. ... Clyde is a small town in Central Otago, New Zealand. ...

History

There was considerable controversy when the dam was planned as to whether it was needed, and because it would flood many houses and orchards upstream at Cromwell, as well as the scenic Cromwell Gorge, which was a highlight of the then young but growing New Zealand tourism industry. Construction would also require the closure of the Otago Central Railway beyond Clyde, though materials for the dam would provide significant traffic for the rest of the line, which was experiencing a drop in freight tonnage. Cromwell is a town in Central Otago in the Otago region of New Zealand. ... The Cromwell Gorge is a deep gorge on the Clutha River in Otago, New Zealand. ... Tourist redirects here. ... The Otago Central Railway or Otago Central Branch Railway was a secondary railway line in Central Otago, in the South Island of New Zealand. ...

The dam was constructed, following the passing of enabling legislation, as part of Prime Minister Sir Robert Muldoon's Think Big projects of the late 1970s and early 1980s, creating Lake Dunstan. The power station has a capacity of four 120 MW francis turbines (for a total of 480MW), but is only allowed to run 432 MW due to resource consent conditions. The dam was built so that two further penstocks and turbines could be installed, but as of 2007 there are no plans to do so. The Prime Minister of New Zealand is New Zealands head of government and is the leader of the party or coalition with majority support in the Parliament of New Zealand. ... For the fictional character in Jurassic Park, see List of characters in Jurassic Park. ... The New Zealand Prime Minister Robert Muldoon (Prime Minister: 1975 - 1984; Sir Robert from 1983) and his New Zealand National Party government in the early 1980s sponsored Think Big as an interventionist state economic strategy. ... Lake Dunstan is located in the South Island of New Zealand. ... The megawatt (symbol: MW) is a unit for measuring power corresponding to one million (106) watts. ... Francis turbine (courtsey Voith-Siemens). ... 2007 is a common year starting on Monday of the Gregorian calendar. ...

Clyde Dam under construction circa 1986

Expansion joint

During construction, the adjacent rock was discovered to be microfractured, because of an earthquake faultline. A large amount of slurry cement was pumped into the rock to stop water leaks. This additional work was one reason for a major project cost over-run, which made the dam the most expensive in New Zealand. The other areas of over-run were due to stabilisation of landslides in the Cromwell Gorge. There are over 18 km of tunnels throughout the gorge for draining purposes. Because of all this extra work it overran the budget by nearly an extra 50% and delayed the filling of Lake Dunstan by a few years. Image File history File links Metadata Size of this preview: 800 × 532 pixelsFull resolution‎ (1,022 × 680 pixels, file size: 130 KB, MIME type: image/jpeg) File historyClick on a date/time to view the file as it appeared at that time. ... Image File history File links Metadata Size of this preview: 800 × 532 pixelsFull resolution‎ (1,022 × 680 pixels, file size: 130 KB, MIME type: image/jpeg) File historyClick on a date/time to view the file as it appeared at that time. ... Image File history File links Size of this preview: 800 × 600 pixelsFull resolution‎ (1,000 × 750 pixels, file size: 112 KB, MIME type: image/jpeg) Inside the Clyde dam expansion joint looking towards the lake, a large stainless steel wedge pushes between what is effectively two separate dams to form... Image File history File links Size of this preview: 800 × 600 pixelsFull resolution‎ (1,000 × 750 pixels, file size: 112 KB, MIME type: image/jpeg) Inside the Clyde dam expansion joint looking towards the lake, a large stainless steel wedge pushes between what is effectively two separate dams to form... Left knee-joint from behind, showing interior ligaments. ... Geologic faults, fault lines or simply faults are planar rock fractures, which show evidence of relative movement. ... For other uses, see Cement (disambiguation). ...

References

Year 1993 (MCMXCIII) was a common year starting on Friday (link will display full 1993 Gregorian calendar). ... The Electricity Corporation of New Zealand Ltd (ECNZ) is a New Zealand State-Owned Enterprise formed on April 1, 1987 as a transition entity in the process of deregulating the New Zealand Electricity Market. ...

External links

• LEARNZ photos showing various stages of the construction