Accumulated rock, gravel and sediment moves along Spokane River   

Tags: Avista Utilities, Electricity, Environment, Spokane River, Video, Wildlife

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Post by Dan Kolbet

Hey, everyone. I wanted to share a quick clip of the video I took on the Spokane River last week.

This video shows the removal and relocation of accumulated rock, gravel and sediment at Monroe Street Dam. The crane grabs the materials and places them over the dam and back into the river. This material is the stuff that naturally flows downriver, but collects behind the dam.

My co-worker Communications Manager Anna Scarlett told me that analytical results of materials sampled back in July indicated that sediments were within Washington’s acceptable standards for contaminants. Relocation of the materials over the spillway back into the river is required by federal and state permits to operate the project, and redistributing the materials back into the river will allow them to continue to serve as a potential gravel source for spawning habitat in the Spokane River system.

More work on the river will continue in the next few weeks as we study whether channel modifications can be made to enhance aesthetic flows in the north and middle channels during periods of low river flow.
 
Posted by  System Account  on  8/17/2010
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