Project overview
Radisson to Henday transmission Line R44H map.
Enlarge image: Radisson to Henday transmission Line R44H map.
To maintain the reliability of Manitoba’s electricity system, we built a new 230-kilovolt transmission line to support the province’s aging high-voltage direct current (HVDC) infrastructure.
Known as the Radisson to Henday transmission line (R44H), the proposed line will run approximately 42 kilometres between the Radisson and Henday Converter Stations. It is built within an existing right-of-way corridor and includes electrical connections at both stations.
This project addresses the growing limitations of aging infrastructure and the need for increased transmission capacity between northern converter stations. By reinforcing this critical segment of the HVDC system, the R44H line is expected to enhance overall system reliability and reduce the risk of service interruptions.
How to participate
We thank everyone who provided their feedback and participated in the engagement process for this project. While our formal engagement process to inform the environmental assessment has ended, we remain open and responsive to any questions or concerns that may arise through the project’s construction and operation. The project webpage will continue to be updated as the project progresses through project construction.
Timeline
- engagement: May – September 2023
- file environmental assessment report for regulatory review: December 2023
- licence received: May 2025
- construction start: August 2025
- construction complete: July 2026
- target in-service date: spring 2027
This timeline is subject to change.
Updates
R44H construction complete: July 2026
Construction of the Radisson to Henday transmission line (R44H) was completed in July 2026. The transmission line is expected to go in-service by spring 2027. While physical construction of the Radisson to Henday transmission line is complete, you may still see crews within the easement area to conduct routine maintenance and complete required repairs to the electrical system.
When in-service, this transmission line is expected to enhance overall system reliability and reduce the risk of service interruptions.
Resources
Additional information on the project:
Featured resources
Canadian Navigable Waters Act
Manitoba Hydro hereby gives notice that a submission has been added to the Common Project Search (online registry) pursuant to the Canadian Navigable Waters Act described herein and its description.
Pursuant to paragraph 3(3) of the Minor Works Order of said Act, we have deposited notifications of minor works in accordance with the requirements set out on the External Submission Site on the online Common Project Search Registry (canada.ca).
The Radisson to Henday transmission project (R44H) involves the construction of a new 230kV transmission line along existing Manitoba Hydro Right-of-Way (ROW). The aerial cable will be over the following waterways:
| Registry number | Waterway | Latitude | Longitude |
|---|---|---|---|
| 10419 | Boots Creek | 56.35056 | -94.54583 |
| 10479 | Kettle River | 56.36139 | -94.59083 |
| 10738 | Nelson River | 56.45889 | -94.14305 |
| 11267 | Wilson Creek | 56.36389 | -94.40972 |
| 11268 | Brooks Creek | 56.40472 | -94.18306 |
| 11269 | Unnamed Tributary | 56.40639 | -94.17139 |
Posted September 18, 2025
GIS data
This zip file contains spatial files in ESRI Shapefile format of the project infrastructure. They’re viewable using geographic information system software. We recommend extracting the files to your computer, rather than opening them online. The .kml file will allow you to view the route(s) with software such as Google Earth®.