Little Long Generating Station

Little Long Generating Station
Name	Little Long Generating Station
Location	Long Lake, Ontario, Canada
Status	Operational
Construction began	1958
Commissioning	1960
Owner	Ontario Power Generation
Operator	Ontario Power Generation
Plant type	Hydroelectric
Turbines	6 Kaplan
Capacity	115 MW

Little Long Generating Station is a hydroelectric facility located on Long Lake, near Hearst and within Cochrane District. The station forms part of the Abitibi River watershed and connects to regional transmission networks serving Northern Ontario communities and industrial consumers. It is integrated into provincial energy planning alongside other facilities such as Sir Adam Beck Hydroelectric Generating Stations, Niagara Generating Station, and Manicouagan-Outardes complex.

Overview

Little Long Generating Station is one of several hydroelectric installations in the James Bay drainage basin that contribute to Ontario’s renewable energy portfolio, positioned geographically between Harricana River catchments and the Mattagami River basin. The facility's catchment interactions affect downstream systems including the Abitibi River and cross-border hydrology relevant to Quebec and Ontario Hydro planners. It is referenced in regional infrastructure inventories alongside Kapuskasing, Smooth Rock Falls, and Timmins-area utilities. The station’s operation intersects with provincial agencies such as Ontario Power Generation, Independent Electricity System Operator, and regulatory frameworks involving Ontario Energy Board matters.

History and Construction

Planning for the station followed mid-20th century development trends driven by demand from mining centers like Timmins, Val-d'Or, and paper mills in Hearst and Kapuskasing. Initial surveys involved engineers and firms linked to projects such as Quebec North Shore and Labrador Railway expansions and drew on expertise from earlier projects including Shawinigan Water and Power Company installations. Construction commenced in the late 1950s with heavy equipment sourced through contractors experienced on projects like St. Lawrence Seaway works and workforce supplemented by trades from Sudbury, Sault Ste. Marie, and Thunder Bay. The station was commissioned in 1960 during a period of provincial electrification paralleling projects like Wilmot Hydro Station and corporate reorganizations that eventually created Ontario Hydro and later Ontario Power Generation.

Design and Technical Specifications

The generating station employs multiple Kaplan turbines coupled to vertical shaft generators, a configuration similar to installations at Robert-Bourassa and smaller stations such as Island Falls Generating Station. Civil works include a concrete gravity dam, spillway structures, and intake gates analogous to designs used at Mattagami River facilities. Auxiliary systems encompass step-up transformers, switchgear compatible with Hydro-Québec interties, and control systems that have been retrofitted over time to align with standards from suppliers like General Electric and Siemens. The powerhouse layout reflects engineering practices informed by firms that worked on Les Saults and Chute-à-Caron projects, with penstocks sized for flow regimes measured against hydrological data from the Ontario Ministry of Natural Resources and Forestry.

Operations and Power Output

Operational protocols coordinate reservoir management and peaking schedules with grid operators including the Independent Electricity System Operator. The station’s nameplate capacity, approximately 115 MW, supports bulk power flows comparable to output contributions from mid-sized stations such as Gatineau Power Station and complements baseload supplied by stations like Pickering Nuclear Generating Station and Darlington Nuclear Generating Station. Seasonal discharge and head variations follow patterns observed across James Bay and Hudson Bay catchments, affecting generation similar to seasonal shifts at La Grande Complex. Maintenance cycles align with practices from Bruce Nuclear Generating Station refueling outages in terms of outage planning, though on a hydroelectric timescale emphasizing turbine rewinds, wicket gate servicing, and civil inspections.

Environmental and Social Impacts

The station’s impoundment and flow regulation have influenced aquatic habitats, fish migration, and water levels, concerns paralleling environmental assessments undertaken for projects like Robert-Bourassa and Smallwood Reservoir. Mitigation measures have included habitat compensation, fishway evaluations, and collaboration with agencies such as the Department of Fisheries and Oceans (Canada) and the Ontario Ministry of Natural Resources and Forestry. Social impacts involved resettlement of local traditional use areas and engagement with Indigenous communities including James Bay Cree communities and regional First Nations similar to consultations held for Wabigoon River developments. Cumulative effects studies reference precedents like Northern Flood Agreement outcomes and mitigation frameworks used in Moses-Saunders Power Dam contexts.

Ownership and Management

Ownership and operational responsibility reside with Ontario Power Generation, an entity formed from the restructuring of Ontario Hydro and interacting with provincial institutions including Ministry of Energy (Ontario) and market operators such as the Independent Electricity System Operator. Asset management practices incorporate methodologies derived from international standards adopted by firms servicing projects like BC Hydro upgrades and Bonneville Power Administration coordination. Stakeholder engagement includes municipal partners from Hearst and district representatives from Cochrane District, regulatory reporting to the Ontario Energy Board, and consultation channels with Indigenous governments modeled after agreements like the Nishnawbe Aski Nation protocols.

Category:Hydroelectric power stations in Ontario Category:Ontario Power Generation