This was the first station built on the Teviot River. It was commissioned in 1924, originally operating with two generators, each of 125 kW output and driven by Francis turbines. In 1926 a third Francis machine of 500 kW was added to the scheme. 1966 saw the two original machines replaced by one 500 kW unit, driven by a Gilkes Impulse Turgo turbine. During extensive refurbishment in 2002, the two 500 kW machines were replaced by a single machine with 1000 kW capacity.

The George Station operates with a 117 m head.

At this time, the Wye Creek Hydro Scheme was capable of producing 400 kW of energy. A further 1000 kW generator and turbine (formerly used at the Lower Roaring Meg Scheme) was added in late 1991 during a major refurbishment of the scheme. The original machine was replaced in 2011.

The annual generation for Wye Creek is 9 GWh.

The original Lower Roaring Meg scheme had an intake in the stream, giving a 304m head. The water was fed through 2.4 km of 762 mm and 609 mm concrete lined steel pipes, (now replaced with steel pipe) to two Pelton wheels, direct coupled to two 850 kW, 6,600 volt alternators.

Originally the Lower Roaring Meg Scheme had a generating plant of 1,700 kW. The station was upgraded in 1989 when a 2 MW Reliance Synchronous Generator was installed, replacing one of the Metropolitan-Vickers generators, increasing Meg's output to 3,000 kW.

A devastating flood in November 1999 inundated the power station. Generators and turbines could be saved and refurbished however the control equipment was completely destroyed and was totally replaced. The station resumed generation in July 2000.

The station began producing power in July 1947.

The temporary plant produced 500 kW of energy, which was much needed to meet the extra demands created with the Roxburgh Dam construction.  Work began on the present station in 1951 and was completed for commissioning in 1954.  It has a maximum generation output of 3,000 kW.

The station’s water supply comes from the Combined Irrigation Companies (CIC) - owned Fraser Dam.  The dam is a concrete arch type, 35m high, impounding a lake of 46ha.  About 5km downstream is the intake to the pipeline, which is in the form of a 10m high concrete arch weir.  From the weir is a concrete low-pressure pipeline 4.5km in length.  Pioneer Generation began a ten-year pipeline upgrade programme in 1999.  Each year a section of concrete pipeline is being replaced with continuous welded steel pipe.  The steel penstock is 580m long.

The station’s electrical equipment was completely refurbished in 2001 to provide automatic control and monitoring. The dam and weir are remotely controlled.

The Fraser River Station is a different concept in design from others in New Zealand, there being no powerhouse building as such.  All generating equipment is situated outdoors under large metal covers, a small building contains instrument panels and control equipment.  It is believed that this station is the only one of its type in New Zealand.

The cost of the original development was shared between the OCEPB and the Crown on the condition that half the output of the station during the summer months be supplied free of charge to pumps on the Earnscleugh, Galloway, Ripponvale and Pisa Irrigation Schemes.  In recent times this agreement has been renegotiated with the CIC representing the combined interests of the current owners of these four irrigation schemes.

Despite heavy flooding several times during the course of the project, an intake dam and pipeline were constructed. The powerhouse was built, plant installed, and reticulation of the district undertaken for an official opening by 8 February 1969.

In January 1994 very heavy rain caused disastrous flooding throughout the district. The outcome for the station was the gravel riverbed rising to the top of the main door frame level of the powerhouse. A concrete wall now surrounds the powerhouse.

The station operates at a head of 91m. The penstock comprises steel pipes, with an overall length of 457m. The water supply originates from the spill at George Station, on the hillside above. This outflow is taken through a vertical slide gate to the penstock of Teviot Bridge. Provision has been made for an overflow outlet pipe at the George Station when the Teviot Bridge Station is off line.

The Ellis Station has two generating machines. These machines are driven by Boving Twin Pelton turbines, which were manufactured in 1942. The station produces a maximum output of 7,800kW.

Completed in 1982, staff engineers undertook the design work for the 17m high arch dam.  A new technique for the time was employed in construction that involved the use of flat-plate hydraulic jacks being built into the central vertical construction joint in the dam sections.  After the concrete had cured, 1,200 tonnes of pressure was applied by the jacks to force the two sections apart and into the rock walls of the valley.  The gap produced was then grouted to hold the dam in this position.  This method produced a safer design, which used less concrete than a conventional arch dam.

Michelle’s water supply is brought from the Marslin Dam via a steel and concrete pipeline. The station has an overflow pipeline alongside the main penstock, which enables water to continue flowing to the lower stations when the Michelle Station is off line. Discharge and overflow water from the Michelle Power Station moves via a race to a head pond, the scheme’s third reservoir and day storage area for the lower Teviot stations.

A new Lake Onslow arch dam constructed in 1982 raised the level of the lake by five metres and drowned the original dam. 

The water to power the five Teviot River stations flows from Lake Onslow.

A small 2kVA rated output machine was installed at Lake Onslow in 1984 to provide local power for control equipment and servicing of the Lake Onslow Dam.

Roadworks to provide access to the site began in December 2002 and a transmission line was built to take electricity generated to Ranfurly via the Oturehua sub-station. The construction of the powerhouse, which is a basic reinforced concrete structure, began early 2003. It has a removable concrete slab roof, to enable heavy items to be installed and removed by crane. 

Water supply to the station is via a pipeline from Falls Dam. The dam is a rock fill structure built in 1935 for irrigation purposes; it is owned and operated by the Falls Dam Company. Water is brought to the station via a low level pipeline split off from the existing irrigation line. A siphon pipe joins the lower level supply to provide additional flow from crest level when the full flow is required.

The station has a maximum generation capacity of 1,250 kW.

The dam is of unique construction, being the first roller compacted concrete dam in New Zealand. Here, a stiff mix of concrete is rolled by machinery into place, rather than poured into forms and boxes. It incorporates a stepped spillway on the downstream face. A 180m long tunnel feeds the 830m of pipeline and penstock to the powerhouse with water from the dam. The majority of the pipeline is buried with the penstock being supported above ground on concrete pedestals.

The powerhouse itself is a steel framed structure on a reinforced concrete foundation, which includes support for the turbine and generating plant

Five kilometres of new road were constructed to the site and 6 kilometres of existing road upgraded, including construction of culverts and cattle stops.

Any possible adverse environmental impact of such a construction was kept to a minimum.  The result is aesthetically very pleasant.  The dam itself has won a Caltex Construction Award and was nominated for judgement before ACENZ and the NZ Concrete Society.

Construction commenced in mid 2009 and the station was completed and commissioned in December 2010.

The site of the power station is approximately 3.5km east of Roxburgh adjacent to the Teviot Irrigation Company (TIC) intake weir on the Teviot River.  The pipeline and penstock associated with the power station runs from the Marslin Dam some 1.5 km upstream.

The new pipeline follows the route of the existing pipeline that supplies water to the Michelle Power Station from the Marslin Dam. 

No adverse environmental effects are evident from the construction of the scheme.

45 metre tubular steel towers support each nacelle and each rotor has three blades, 44 metres in diameter that harnesses the wind and drives the generators. At wind speeds of 14.5 km/h, the turbines start producing power and maximum generation is at wind speeds above 61 km/h. The Mt Stuart Wind Farm produces enough electricity to meet the needs of approximately 3195 households.

Pioneer Generation Ltd manages the Southern Generation Limited Partnership and specialises in small hydro, wind and thermal generation and heat plant around New Zealand. Roaring Forties partners, The Power Company and Electricity Invercargill, own and operate the electricity networks across Southland and parts of Otago. They jointly own PowerNet who operate and manage those networks. TPCL has over 34,600 connected customers across Southland and West Otago area and is owned by the consumers connected to the network through the Southland Electric Power Supply Consumer Trust. EIL has over 17,200 connected customers in Invercargill city and Bluff township. EIL is owned by the Invercargill City Council, through its subsidiary Invercargill City Holdings Limited. TPCL and EIL also jointly own the OtagoNet electricity network.Pioneer Generation Ltd, The Power Company Ltd (TPCL) and Electricity Invercargill Ltd (EIL) came together to form a new wind generation investment partnership, being Southern Generation Limited Partnership (Southern Generation).  Pioneer holds a 50% stake in the partnership with the other 50% held by TPCL and EIL.

In late December 2015 Southern Generation acquired from Nova Energy, the Aniwhenua Hydro Electric station in the Bay of Plenty.  The first North Island hydro powerstation to be owned by the Partnership.

The Matiri scheme (alongside the Upper Fraser scheme) adds another 12 MW and nominally 60 GWh of generation to the Southern Generation Limited Partnership's portfolio (SGLP took ownership on completion).