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for each potential energy option.
Uprating involves replacing older components of generating equipment with new, more efficient components. The result is that the generator can produce more electricity with the same amount of water. Refurbishments are major overhauls of existing facilities where many pieces of equipment are reaching end of life.
KGS Group completed an uprate study in 2016 that considered options for uprating one or both of the older Aishihik hydro units. A similar study is being done by Hatch for the Whitehorse hydro units and is expected to be finished by early 2017. For the purposes of our work to date we have estimated costs and benefits of the Whitehorse unit uprates.
KGS also looked at four options for the future of the original Mayo hydro facility that included refurbishing the hydro station, replacing it, abandoning it, or removing it.
|Annual Energy||Firm Energy||Installed Capacity||Dependable Capacity||Levelized Cost of Energy||Levelized Cost of Capacity||Project Life||In-service Lead Time|
|Aquatic environment||Most favourable|
|Terrestrial environment||Most favourable|
|Air quality||Most favourable|
|First Nation lands||Most favourable|
|Traditional lifestyle||Most favourable|
|Heritage resources||Most favourable|
|Tourism/recreation/other land uses||Most favourable|
|Cultural/community well-being||Somewhat favourable|
|Local economic benefits||Least favourable|
|Climate change risk||Most favourable|
The Aishihik study found that by uprating both older hydro units, the plant efficiency could increase by four percent.
In terms of the original Mayo hydro plant, the evaluation found that refurbishing the facility was the most economical option.
Whitehorse uprating is expected to increase efficiency by four percent.
Least expensive energy option
Relatively inexpensive capacity option
Little, if any, environmental impact