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The spillway on the Ruataniwha Dam.
The dam forms Lake Ruataniwha and is located in the Mackenzie Basin in New Zealand's South Island.
An artificial lake, it was formed as part of the Waitaki hydroelectric project. It lies on the traditional boundary of the Canterbury and Otago provinces with the town of Twizel two kilometres to the north.
It is named after Ruataniwha Station, a large sheep station in the area, part of which was purchased by the NZ Electricity Department as the site for the township of Twizel.
The lake is approximately 4.5 km in length and covers 3.4 square km.
It was formed by the New Zealand Ministry of Works as part of the Upper Waitaki Power Project between 1977[2] and 1981 in a gorge created by the Ohau River. The gorge was blocked by the building of the Ruataniwha Dam whose crest carries State Highway 8 between Twizel and Omarama.
Lake Ruataniwha is fed by the output from the Ohau A power station and also by an overflow discharge from Lake Ohau down the normally dry bed of the Ohau River.
The lake functions as a surge reservoir for the power scheme. If, during excessive inflows into Lake Ohau which Ohau A is unable to pass or, when there has been a failure of the Ohau canal, Lake Ohau can overflow a weir into the normally dry bed of the upper reaches of the Ohau River and thus into Lake Ruataniwha. Also, if water cannot pass down the canal to Ohau B then the excess inflows into the lake can be diverted by the spillway down the bed of the lower reaches of the Ohau River to Lake Benmore. While limited the storage capacity of the lake also ensures that the flows through Ohau A do not have to be exactly matched to those through Ohau B and Ohau C.
Ruataniwha discharges through a natural gap in the dam into a canal which feeds the Ohau B power station.
Before construction of the dam could start the Ohau River was diverted by cutting a channel through a low, rocky extension of the Benmore Range and building three diversion gates there which consumed 100,000 cubic metres of concrete. The Ohau River was diverted in August 1980 so that water passed through Ohau A and then back down the river bed. Later that year, downstream of Ohau A, the river was again diverted, this time away from its natural channel and through the completed gates. An earth dam with gravel shoulders was then built on its upstream and downstream sides. The main dam, which blocks the original river channel, is 240 metres long while an adjoining wing dam is 480 metres. When the dam was completed the diversion gates were closed which, beginning in March 1982,[5] impounded the water behind the dam up to and over a temporary weir which had been built downstream of Ohau A. In 1984 the lake was temporarily lowered by 3 metres while this weir was removed to improve the performance of the Ohau A power station. The diversion gates now function as spillway gates to allow excess water to pass safely through the dam.
CHINA SHANGHAI HONGQIAO 19MAY10 - Installation of solar photovoltaic panels on the roofs of the Hongqiao Passenger Rail Terminal in Shanghai, China. There are a total of 23000 solar panels planned for the CECIC-funded project, each panel with a production capacity of 280 KWh to feed into the electricity grid.
jre/Photo by Jiri Rezac
© Jiri Rezac 2010
Wind Turbines are dotting the mountains across the country. An alternative to coal fired electricity generation wind farms are not without their detractors. An interesting debate.
Steam driven turbine drives the power generator through a gear box in the powerhouse at Millaquin Sugar Mill.
Ruskin Dam is a concrete gravity dam on the Stave River in Ruskin, British Columbia, Canada.
The dam was completed in 1930 for the primary purpose of hydroelectric power generation. The dam created Hayward Lake, which supplies water to a 105 MW powerhouse and flooded the Stave's former lower canyon, which ended in a small waterfall approximately where the dam is today.
Ruskin Dam is part of the Alouette-Stave Falls-Ruskin Hydroelectric Complex. Upstream of the dam is the Stave Falls Dam and Powerhouse which has an installed capacity of 90 MW.
Supplementing Stave Lake is small amount of water from Alouette Lake which is created by the Alouette Dam in northern Maple Ridge via 3,501 ft long tunnel connecting intakes at the northern end of Alouette Lake and Stave Lake.
At the end of the tunnel is a penstock which feeds the 8 MW Alouette Powerhouse on the western shore of Stave Lake approximately 8 km north of Stave Dam. Water released from Stave Falls Dam flows into Hayward Lake and is used by the Ruskin Dam for power generation
(Wikipedia)
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CHINA SHANGHAI HONGQIAO 19MAY10 - Installation of solar photovoltaic panels on the roofs of the Hongqiao Passenger Rail Terminal in Shanghai, China. There are a total of 23000 solar panels planned for the CECIC-funded project, each panel with a production capacity of 280 KWh to feed into the electricity grid.
jre/Photo by Jiri Rezac
© Jiri Rezac 2010
CHINA SHANGHAI HONGQIAO 19MAY10 - Installation of solar photovoltaic panels on the roofs of the Hongqiao Passenger Rail Terminal in Shanghai, China. There are a total of 23000 solar panels planned for the CECIC-funded project, each panel with a production capacity of 280 KWh to feed into the electricity grid.
jre/Photo by Jiri Rezac
© Jiri Rezac 2010
A natural gas steam power generation station located in Saskatoon Saskatchewan Canada owned and operated by Saskpower.
Douglas Point Nuclear Generating Station CANDU Model. Seen at the Canada Science and Technology Museum, Ottawa, ON. Storage Facility. Artifact no. 1980.0108.
Photo by: D. Maillet
End Fitting tag for display model.
CHINA SHANGHAI HONGQIAO 19MAY10 - Installation of solar photovoltaic panels on the roofs of the Hongqiao Passenger Rail Terminal in Shanghai, China. There are a total of 23000 solar panels planned for the CECIC-funded project, each panel with a production capacity of 280 KWh to feed into the electricity grid.
jre/Photo by Jiri Rezac
© Jiri Rezac 2010
Steam driven turbine drives the power generator through a gear box in the powerhouse at Millaquin Sugar Mill.
As the Intermountain Power Project Delta power plant proceeds with its conversion to natural gas Union Pacific has delivered a steady stream of high-wide components. On June 29 2024 four of these transformers arrived at the car repair yard in Springville Utah. On July 2 representatives of Siemens arrived to throw up the banners over their sides, apparently to advertise their participation in the conversion to low-carbon fuels on the final desolate desert leg of the journey to the plant.
CHINA SHANGHAI HONGQIAO 19MAY10 - Installation of solar photovoltaic panels on the roofs of the Hongqiao Passenger Rail Terminal in Shanghai, China. There are a total of 23000 solar panels planned for the CECIC-funded project, each panel with a production capacity of 280 KWh to feed into the electricity grid.
jre/Photo by Jiri Rezac
© Jiri Rezac 2010
Ice fog creates an eerie feeling near Yukon Energy's power generating facility in Whitehorse. With ambient air temperatures hovering close to minus forty celcius, even far away sounds seem close by.
CHINA SHANGHAI HONGQIAO 19MAY10 - Installation of solar photovoltaic panels on the roofs of the Hongqiao Passenger Rail Terminal in Shanghai, China. There are a total of 23000 solar panels planned for the CECIC-funded project, each panel with a production capacity of 280 KWh to feed into the electricity grid.
jre/Photo by Jiri Rezac
© Jiri Rezac 2010
Long dormant this coal loader and conveyer sit silent. The setting sun behind a wall of clouds. Ghosts of a life lived long ago aging under the setting sun.
I received permission to photograph this site and upload the images. If you recognize it please do not mention the location or I will have to remove you comment. It was one of the requirements of me gaining access.
Ohau A is a hydro station located in the Mackenzie Basin, South Canterbury, New Zealand. It has four 66 megawatt generating units, and a generation output of up to 264 megawatts.
The Ohau A power station is located at the end of the manmade Pukaki canal. The Pukaki canal joins with the Ohau canal to consolidate the water flows from Lake Ohau and Lake Pukaki.
Ohau A was the second hydro station to be built on the Upper Waitaki hydro scheme. The Waitaki hydro scheme is made up of eight hydro stations on the Waitaki River in the South Island.
During construction of Ohau A, approximately two million cubic metres of rock and gravel was excavated from the northern bank of the Ohau River.
Douglas Point Nuclear Generating Station CANDU Model. Seen at the Canada Science and Technology Museum, Ottawa, ON. Storage Facility. Artifact no. 1980.0108.
Photo by: D. Maillet
Front base view, with descriptive plate for display model.
CHINA SHANGHAI HONGQIAO 19MAY10 - Installation of solar photovoltaic panels on the roofs of the Hongqiao Passenger Rail Terminal in Shanghai, China. There are a total of 23000 solar panels planned for the CECIC-funded project, each panel with a production capacity of 280 KWh to feed into the electricity grid.
jre/Photo by Jiri Rezac
© Jiri Rezac 2010
CHINA SHANGHAI HONGQIAO 19MAY10 - Installation of solar photovoltaic panels on the roofs of the Hongqiao Passenger Rail Terminal in Shanghai, China. There are a total of 23000 solar panels planned for the CECIC-funded project, each panel with a production capacity of 280 KWh to feed into the electricity grid.
jre/Photo by Jiri Rezac
© Jiri Rezac 2010
CHINA SHANGHAI HONGQIAO 19MAY10 - Installation of solar photovoltaic panels on the roofs of the Hongqiao Passenger Rail Terminal in Shanghai, China. There are a total of 23000 solar panels planned for the CECIC-funded project, each panel with a production capacity of 280 KWh to feed into the electricity grid.
jre/Photo by Jiri Rezac
© Jiri Rezac 2010
Free energy, and lots of it. Between this thing, wind turbines, geothermal power, tidal turbines and wave converters, power lines around the world need never run dry. Throw algae and halophyte-based third-generation biofuels in the mix, and we can have our cake and eat it too when it comes to reducing carbon emissions AND still having the benefits of a high-energy society.
Taken on Burlington Beach in Burlington. Ontario.
Douglas Point Nuclear Generating Station CANDU Model. Seen at the Museum of Science and Technology, Ottawa, ON. Storage Facility. Artifact no. 1980.0108.
Photo by: D. Maillet
Cut-away interior view.