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Rough waters in the tailrace from Barrett Chute hydroelectric station.

River system data

Ontario Power Generation operates 66 hydroelectric stations, including a green power portfolio of 29 small hydroelectric plants, and 241 dams on 24 river systems.

OPG tracks water levels and flows with water level gauges at stations and dams across our hydro operations. This information is available to the public and can be accessed with the links below.

We also collect data on snow depth and water content. Here is the most recent snow survey information.