Main Diversion Dam – Grand Lk Reservoir is a 129MW hydro power project. It is located on Humber River river/basin in Newfoundland and Labrador, Canada. The project is currently active. It has been developed in single phase. Post completion of construction, the project got commissioned in 1925.

Project Type Total Capacity (MW) Active Capacity (MW) Pipeline Capacity (MW) Project Status Project Location Project Developer
Hydropower 129 129 Active Newfoundland and Labrador, Canada


The project is currently owned by Deer Lake Power.

The hydro reservoir capacity is 1,788.56 million cubic meter. The gross head and net head of the project are 80m and 74m respectively.

Development Status

The project got commissioned in 1925.

Contractors Involved

Newport News Industrial was selected as the turbine supplier for the hydro power project. The company provided 2 units of francis turbines.

The electric generators for the project were procured from General Electric and Newport News Industrial.


All power projects included in this report are drawn from GlobalData’s Power Intelligence Center. The information regarding the project parameters is sourced through secondary information sources such as electric utilities, equipment manufacturers, developers, project proponent’s – news, deals and financial reporting, regulatory body, associations, government planning reports and publications. Wherever needed the information is further validated through primary from various stakeholders across the power value chain and professionals from leading players within the power sector.