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Environment News November 15, 2021

Spada Lake Reservoir begins spilling Nov. 15!

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Spada Lake Reservoir begins spilling Nov. 15!

More than 3.5 inches of rain in 24 hours on top of a week of significant rainfall caused the Spada Lake Reservoir to begin draining through the Culmback Dam spillway at 3 a.m. on the morning of Nov. 15. The Culmback Dam is part of the PUD’s Jackson Hydro Project in the Sultan Basin.

Spilling is natural and the dam spillway was built to perform the action to keep the reservoir at a manageable height. When the reservoir water level reaches approximately 1450 feet, the water begins draining through the morning glory spillway safely to the Sultan River below.

Going into the weekend of Nov. 13-14, the Spada Lake area had 6.5 inches of rain over the prior Thursday and Friday to raise the reservoir nearly 9.5 feet and put into position to start spilling.

(The featured photo shows a spill event from February 2020.)