Thursday, June 16, 2011

Dates Set for Condit Dam Removal

Having cleared the regulatory hurdles and legal challenges the long anticipated removal of Condit Dam will go ahead this fall. This week the dams owner PacifiCorp announced that they had received a permit for sediment management from the US Army Corps of Engineers and the dam removal is formally scheduled for the end of October. To meet that deadline dam removal preparations will begin immediately. The dam removal will involve blasting a 12 by 18 foot tunnel through the base of the dam, draining the 92 acre Northwestern Lake in about 6 hours in a controlled high water event. Removing the dam will have an immediate impact on the river below as large amounts of stored sediment are transported downstream, however the sediment is expected to move quickly ultimately restoring spawning gravels and riverine habitats below the dam and providing access to 33 miles of anadromous habitat above the old dam.

More information in the Columbian:

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