The Onimiki project

An enhanced project to meet some issues

The Onimiki Renewable Energy project involves the development of two hydroelectric power stations using the hydraulic forces of the Kipawa reservoir.

The Onimiki project is valued at $475 million
(estimate based on comparable projects)..

Onimiki North power plant

The 60 MW Onimiki North power plant would be located on the banks of the Témiscamingue Lake (about 30 kilometers north of Témiscaming and 15 kilometers southwest of Laniel).

Onimiki South power station

The 10 MW Onimiki South power plant would be located in the town of Témiscaming on the banks of Témiscamingue Lake.

A number of issues and concerns were raised during the fall 2022 consultations.

Onimiki Renewable Energy revised its initial project to respond to several issues that had been expressed. The enhanced version of Onimiki Renewable Energy project is still under development. The final project will be proposed after environmental studies, the information and consultation process and detailed engineering studies. It will be defined in consultation with the community of Témiscamingue.

Existing management agreements that determine, among other things, reservoir water levels or the maintenance of water volumes to promote the spawning of certain fish species would remain in effect and under the responsibility of government departments and organizations.


Onimiki North power plant

The power plant would comprise three generating units capable of producing up to 60 MW.

Short sections of canals would be built to connect the Kipawa reservoir to Thiriot lake and Nadeau lake, as well as a small closure dam downstream of Nadeau lake.

Also, 2.8 kilometers of headworks would be built to supply the powerhouse.

Things to remember

  • Management of the Kipawa reservoir in accordance with historical conditions
  • No significant flooding along Thiriot and Nadeau lakes
  • Ecological and aesthetic flow maintained in the Kipawa River (to be determined during environmental study)
  • Possible improvement in the predictability of whitewater activities in the Kipawa River
  • Guaranteed production in winter
Onimiki South power plant

The power station would have two turbine-alternator groups capable of producing up to 10 MW

The new intake would originate on the right bank of the Lumsden dam. A 1.6 km intake gallery would be built.

Two options are currently being analyzed for the power plant building.

  • Construction of a new power station to the north of the old one;
  • Use of the former Témiscaming power plant building.

Things to remember

  • No changes required at Kipawa dams and Tee Lake.
  • Aucun changement au barrage Lumsden
  • Maintain current flow conditions between Kipawa dam and Lumsden dam (13 cubic metres per second)
  • Minimal visual impact (tunnel feeders)
  • Virtually constant production all year round and guaranteed in winter
  • Ecological flow in Gordon Creek

Production schedule

Spring 2024

Filing of a new project notice with the Ministère de l’Environnement, de la Lutte aux changements climatiques, de la Faune et des Parcs (MELCCFP)

Spring to fall 2024

Additional environmental inventories required for the impact study

Fall 2024

Information and consultation approach

Summer 2025

Filing of the impact study

Fall 2025-Winter 2026

MELCCFP environmental assessment process

Spring 2026

Expected date of government approvals

Summer 2026

Scheduled start of construction

December 2028

Scheduled commissioning date

Hydro-Québec's 2035 action plan

Onimiki Renewable Energy is supported by First Nations and the local communities.

The project meets the objectives of Hydro-Québec's Action Plan 2035 and the Québec government's energy transition plan.