Tuesday, August 4, 2015

All gates now open

As noted last Tuesday, recent rainfall brought very high inflow conditions throughout the basin, particularly to the southern tributaries of the Rainy River, the Vermillion River, and the Seine River.
Rainy Lake also rose above its Upper Rule Curve (URC) on May 29 and now is at the all-gates-open level.

At Fort Frances/International Falls, the dam on the Rainy River has flow passing through all turbines and all sluice gates.
The last two gates were opened at noon on Friday to ensure maximum outflow from the dam.
Both Rainy Lake and Namakan Lake will continue to rise in the near term, and their ultimate peak levels will depend on the amount of rainfall received over the next few weeks.
Meanwhile, the level of Namakan Lake also is above its URC. The dams at the outlet to Namakan Lake have been fully opened since May 16.
Further upstream, particularly heavy rainfall near the Vermillion River has led to the level at Crane Lake rising by over 40 cm (16 inches) since May 30.
Inflow to the Namakan chain of lakes is roughly 20 percent higher than the outflow capacity of the dam.
Up-to-date information can be found at www.ijc.org or by calling 1-800-661-5922 ext. 3.

More stories