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Seine River Watershed
Lac des Mille Lacs Dam
Lac des Mille Lacs Dam
Ontario Ministry of Natural Resources is the owner
of the Lac des Mille Lacs (LDML) dam which was rebuilt by the Ontario
government in 1952. It is currently operated by Valerie Falls Limited
Partnership (Brookfield Renewal Power) under an agreement with the Ministry of Natural Resources.
Lac des Mille Lacs: The Lac des Mille Lacs dam controls water levels and outflows of Lac des Mille Lacs, a large (24,510 ha) lake located at the headwaters of the Seine River system. The watershed area for the Lac des Mille Lacs dam is small (177,455 ha) relative to the size of the lake, which makes up a large proportion of the watershed area (14% of total watershed area). This means that it takes a relatively long time to replace water in the lake, which limits the amount of water level fluctuation that can occur. Inflow into the lake is uncontrolled.
| Reservoir (storage) |
1,500 m3/sec/days |
| Constructed |
1952 |
| # of sluices |
7 with 8 logs available for each
slot |
| Level at top of log with all
logs in |
456.99 metres |
| Level of sill with all logs out |
454.59 metres |
| Constraints |
None |