Thunder Bay Generating Station
|Thunder Bay Generating Station|
The Thunder Bay Generating Station
|Location||Thunder Bay, Ontario|
|Owner(s)||Ontario Power Generation|
Advanced biomass future
|Nameplate capacity||326 megawatts|
The Thunder Bay Generating Station ("Thunder Bay GS") is owned by Ontario Power Generation ("OPG") and is located on Mission Island on the shore of Thunder Bay, an inlet of Lake Superior. The plant provides energy to parts of Thunder Bay District in Northwestern Ontario.
The Government of Ontario announced plans in November 2013 to convert Thunder Bay GS to advanced biomass fuel. As of January 2014, Thunder Bay GS is the last coal fired station in Ontario following the announcement that Nanticoke Generating Station stopped generating on 31 December 2013.
Thunder Bay GS began operation in 1963, with one 100 MW coal-fuelled generating unit. Two additional coal-fuelled units were added in the early 1980s, and in 1984 the original 100 MW unit was removed from service. This plant is connected to the power grid via 115 Kv and 230 Kv transmission lines. The station occupies 53 ha (131 acres) on Mission Island, at the mouth of the Kaministiquia River delta on Thunder Bay. The plant's chimney is 198 m (650 ft) tall.
The two coal-fuelled boilers provided a peak output of 326 MW fuelled by low sulphur lignite coal from Western Canada and low sulphur sub-bituminous coal from the Powder River Basin in the United States.
While operating as a coal plant, annual production was approximately 1.5 billion kilowatt-hours (KWh), enough energy to supply over 100,000 households for one year.
Conversion from coal
There have been multiple announcements on the future of Thunder Bay GS over a 10-year period. The Ontario government initially proposed a conversion to natural gas in 2004 but subsequently cancelled that plan in 2006.
Then, as part of the 2010 Long-Term Energy Plan, Ontario's Ministry of Energy announced that Thunder Bay GS would be converted from coal to natural gas by the end of 2014. This was part of the Ontario government's commitment to phase out all of its coal-burning power generation.
On 1 November 2012, OPG announced that the Ontario Power Authority requested that the conversion to natural gas be suspended until the Ontario Power Authority could assess generating needs in northwestern Ontario. The next announcement on the generating station's fate was made in November 2013 when the Ministry of Energy announced that Thunder Bay GS would be converted to advanced biomass.
Ontario’s Minister of Energy Bob Chiarelli outlined the broad terms of the conversion in a directive  to the Ontario Power Authority dated 16 December 2013. Chiarelli noted that the station will have only one unit operating as a peaking plant and that OPG is only permitted to purchase 15,000 tonnes of fuel annually. It is estimated that the 15,000 tonnes of fuel will permit the single unit to operate at 2% of capacity.  It is expected that the conversion will be complete in 2015 and that the generating station will have a five-year contract to produce electricity.
|Greenhouse gas||Sum (tonnes)||Sum (tonnes CO2e*)|
*Calculated figures for CO2e are rounded to the nearest tonne.
|Year||Emissions (tonnes CO2e)|
- "Facility and GHG Information - Thunder Bay Generating Station". Environment Canada. Retrieved 23 December 2012.