AltaLink’s existing 551L transmission line is a single circuit 69 kilovolt (kV) line. Located between the Town of Banff and the Village of Lake Louise, the line is approximately 60 kilometres (km) long.

The line was originally constructed in 1960. In 2020, AltaLink completed rebuilding the majority of line. Since then, AltaLink has completed a further wildfire risk assessment and additional field reviews. Following these activities, AltaLink is proposing to conduct fire risk mitigation work on the line.

For more information on the project, please review the Project newsletter and related maps (Strip maps, Strip index and Detail photo map).

Draft Basic Impact Assessment

As the project is located in Banff National Park, AltaLink is required to complete an impact assessment as per the Impact Assessment Act, 2019. AltaLink has engaged with Parks Canada to develop a draft Basic Impact Assessment (BIA). The BIA identifies baseline conditions within the project area, assesses the potential effects of the project on natural and cultural values, and proposes mitigations to ensure there are no significant adverse effects. If you have any questions, please let us know within 30 days by April 30, 2026, to ensure they are considered.

Based on the questions received and in consultation with Parks Canada, AltaLink will consider all input, finalize the BIA, and submit for Parks Canada’s approval. Click to view the Draft BIA Executive Summary and the Draft BIA.

You can reach out to AltaLink directly with questions on the project or BIA through the details listed in the Contact us section in the project newsletter.