Transmission

Electricity transmission is the movement of electrical energy at high voltage. Transmission infrastructure includes the lines, poles that support the lines, and substations.

Process

Studies

Midgard Consulting did an evaluation of the operations for eleven transmission routes of interest.

The routes were identified through a process that considered connecting future generating resources with the existing transmission system. The evaluation considered things such as building and operating costs, power transfer capacities, and development schedules.

The routes evaluated include:

  • Faro to Finlayson
  • Faro to Watson Lake
  • Aishihik to Destruction Bay
  • Whitehorse to Skagway
  • Whitehorse to Atlin
  • Whitehorse to Atlin – Mt. Black
  • Whitehorse to Teslin
  • Whitehorse to Squanga – Dalayee
  • Whitehorse to Tutshi – Windy Arm
  • Whitehorse to Racine – Moon Lake – Tutshi
  • Whitehorse to Lindeman

Technical and Financial Findings

Transmission Route Voltage Length Reliable Transfer Capacity Capital Expenditure Operation Expenditure Project Life In-service Lead Time
kV km MW $ $/kWh yr Years Years

Option #1

Faro to Finlayson

138 233 84 $221M $351 55 4.33

Option #2

Faro to Watson Lake

230 414 190 $597M $613 55 6

Option #3

Aishihik to Destruction Bay 1

138 157 122 $167M $217 55 3.83

Option #4

Aishihik to Destruction Bay 2

230 157 484 $241M $217 55 3.83

Option #5

Whitehorse to Skagway 1

138 170 114 $166M $285 55 4.08

Option #6

Whitehorse to Skagway 2

230 170 443 $251M $285 55 4.08

Option #7

Whitehorse to Atlin

138 172 97 $158M $236 55 4.08

Option #8

Whitehorse to Teslin

138 174 95 $165M $239 55 4.08

Option #9

Whitehorse to Squanga – Dalayee

138 105 134 $100M $143 55 3.25

Option #10

Whitehorse to Atlin – Mt. Black

138 127 131 $119M $174 55 3.67

Option #11

Whitehorse to Tutshi – Windy Arm

138 96 135 $94M $143 55 3.17

Option #12

Whitehorse to Racine – Moon Lake – Tutshi

138 112 132 $108M $168 55 3.33

Option #13

Whitehorse to Lindeman

138 129 129 $125M $200 55 3.75

Option #14

Jake’s Corner to Atlin

69 93 38 $54M $129 55 4.08

Option #15

Whitehorse to Atlin

69 172 21 $104M $236 55 4.83

Evaluation

Aquatic environment Most favourable
Terrestrial environment Somewhat favourable
Air quality Most favourable
First Nation lands Somewhat favourable
Traditional lifestyle Most favourable
Heritage resources Most favourable
Tourism/recreation/other land uses Most favourable
Cultural/community well-being Most favourable
Local economic benefits Somewhat favourable
Climate change risk Somewhat favourable
  •  Most favourable
  •  Somewhat favourable
  •  Least favourable

Notes

There are a number of risks that must be considered related to developing transmission corridors. There are meteorological risks such as extreme cold, snow and wind. Geotechnical risks include permafrost, exposed bedrock, and steep slopes. Social risks are related to permitting on First Nations settlement land, urban or populated areas, and recreational/park areas. Finally, there are political risks related to transmission lines that would cross the Yukon border into Alaska or British Columbia.

Download the PDF version

Initial key findings

Pros

N/A

Cons

Expensive

Some may be difficult to permit