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Atikokan Rainfall
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Lac des Mille Lacs Dam
Raft Lake Dam
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Wagita Bay Dam
Valerie Falls Dam
Calm Lake Dam
Sturgeon Falls Dam
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Seine River Watershed
Calm Lake Dam
Calm Lake Dam
Abitibi
Hydro Canada owns and operates both the Calm Lake dam and the Sturgeon
Falls dam. The Calm Lake dam controls water levels in the reach from Calm Lake to Perch Lake under normal flows (combined area of 3,660 ha). As with the Valerie Falls dam, lakes (known as the headpond) account for a very small amount (0.6%) of the total watershed upstream from it (575,000 ha). There are significant uncontrolled inflows to this dam (20% of total inflow area), principally of the Atikokan River and Eye River systems. Approximately 80% of the inflow area to Calm Lake dam is controlled by the Raft Lake dam.
At low flows, the Calm Lake dam controls water levels over the entire headpond up to Perch Lake. At higher flows (flows above about 75 m3/sec), the narrows between Chub Lake and Banning Lake acts as a constriction, resulting in events when water levels are much higher in Perch Lake, Chub Lake and Little McCaulay Lake than in Calm or Banning Lake. At these times, the Calm Lake dam has less control over water levels in Perch Lake, Chub Lake and Little McCaulay Lake.
| Reservoir (storage) headpond |
95 m3/sec/days |
| Constructed |
1926 |
| # of sluices |
16 sluices including 1 remote operated
waste gate; discharge capacity is 566 m3/sec
at 382.5 m; maximum 24-hour flow (June 24, 1950) was 370 m3/sec;
spillage occurs at 382.52 m |
| Level at top of log with all logs
in |
382.52 m |
| Level of sill with all logs out |
waste gate 380.09 m, slot 1 is
378.26 m; slot 2–15 are 380.09 m |
| Power Generation |
9 MW; turbine capacity 10–48 m3/sec |
| Constraints |
None |
