Official name Aviemore Dam Operator(s) Meridian Energy Creates Lake Aviemore Create Lake Avie | Opening date 1968 Impounds Waitaki River Opened 1968 Construction began 1962 | |
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Location Canterbury/Otago, New Zealand Address Te Akatarawa Rd, Avie 9435, New Zealand Similar Waitaki River, Ben Dam, Ohau A, Ohau C, Elephant Rocks | ||
The Aviemore Dam is a dam of the Waitaki River in New Zealand. Built from earth and concrete in the 1960s (and completed in 1968) to dam Lake Aviemore, it is one of the major dams of Meridian Energy, and is used to power a hydroelectric power plant. It is a part of the Waitaki River Hydroelectric System, a scheme which supplies 30% of New Zealand's considerable amount of hydropower.
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Water spilling waitaki hydro benmore aviemore dams january 2013
Composite structure
The dam is located over unequal ground underneath, due to the line of the Waitangi Fault. On the northern side in Canterbury, the dam is founded on solid rock, and consists of a 335-metre (1,099 ft)-long concrete structure. On the southern side in Otago, the dam crosses the fault as a 457 metres (1,499 ft) long earth dam. During the construction of the concrete section, low-heat cement was first used in a large-scale application in New Zealand, to allow quick concrete pouring without the need for cooling elements.
Hydroelectric facilities
The dam contains 4 francis turbines of 55 megawatts (74,000 hp) each (220 megawatts (300,000 hp) total), with the generators being 4 x 11 kV. The facility produces approximately 942 gigawatt-hours (3,390 TJ) of electricity per year. The net hydraulic head is 37 metres (121 ft), with the penstocks (water pipes leading to the turbines) being the largest in New Zealand (as of 2007), with 7 metres (23 ft) diameter each. It is in waitaki
Seismic strengthening
In the 2000s (decade), work was undertaken to strengthen the dam against earthquake forces and to reduce the effect of overtopping resulting from earthquake-induced landslides into Lake Aviemore, as the dam straddles the Waitangi Fault, which at the time of construction had been considered inactive, but has since been upgraded to dormant. The analysis and design was undertaken by Opus New Zealand and URS New Zealand, who received an ACENZ Innovate NZ Silver Award for their safety evaluation & upgrade.