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Seine River Watershed
Management
Wagita Bay Dam
Wagita Bay Dam
The Ontario Ministry of Natural Resources is the owner of the Wagita
Bay dam, which was constructed in 1943 and raised to present height in
1952. It impounds the Valerie Falls headpond and provides minimum flow to
Steep Rock Lake. The minimum flow (0.1 m3/sec) is from stoplog leakage and
remains constant year-round. The Wagita Bay Dam is primarily a block dam
that serves to separate the Seine River diversion from Steep Rock Lake.
It does not act as an effective level control for the Valerie Falls headpond
(Colin Lake-Little Falls Lake). However, it does perform important Aquatic
Ecosystem functions. These include providing minimum flow for walleye spawning
on Steep Rock Lake and water coverage of Steep Rock dredge material.| Reservoir (storage) |
n/a |
| Constructed |
1943; height raised in 1952 |
| # of sluices |
1 9-log sluice; discharge capacity is
35 m3/sec |
| Level at top of log with all logs
in |
404.25 metres |
| Level of sill with all logs out |
400.81 metres |
| Constraints |
Discharges above 4 m3/sec may cause mobilization of silt
in West Arm of Steep Rock Lake. |
Note: The Planning Team recommended that minimum flow from Wagita Bay Dam might be better regulated by a slide gate. Wagita Bay Dam is scheduled for some upgrade work some time during the period 2005–2010. During the upgrade it is anticipated that stop logs might be replaced by new logs or a slide gate and a new hoist mechanism. Prior to construction, flows should be measured with a v-notch weir to establish the appropriate gate setting for the outflows.