By Brian Varela
Tyee Lake set to power borough through winter
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November 21, 2019
Graph courtesy of the Southeast Alaska Power Agency
The dark red line in the graph shows the Tyee Lake water levels for 2019. The water level in the lake is at just about normal levels for this time of the year. Last November, the lake level was at approximately 1,300 feet, about 80 feet lower than the current water level.
The water level at Tyee Lake was at 1,380.6 feet as of Monday, which will allow the hydro plant to produce power for over seven months should all inflows to the lake stop.
As part of the Southeast Alaska Power Agency, Tyee Lake dedicates its power to Petersburg and Wrangell, while Swan Lake produces power for Ketchikan. The 1,380.6 foot water level is about even with normal water levels for this time of the year, and is above the approximately 1,300 foot water level in November 2018, according to SEAPA.
The current lake level can provide enough hydropower to sustain both Petersburg and Wrangel...
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