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Spokane River

Avista projects in downtown Spokane to enhance the Spokane River   

Tags: Avista Utilities, Hydro power, Spokane River, Washington, Electricity, Wildlife, Infrastructure upgrades

Post by Brandi Smith
Click to enlarge map
Whether you’re in downtown Spokane spending the afternoon at Riverfront Park or just happen to walk through the area on your lunch hour, you will see a number of projects taking place in and around the river between Upper Falls and Monroe Street Dams this summer and fall. The work will enhance fish, wildlife, water quality, recreation and aesthetic resources in our community and meet requirements of Avista’s Federal Energy Regulatory Commission (FERC) license to operate our dams on the Spokane River.

As flows drop to summer levels, the following projects will take place in and around the river. If you are in the area, you may see temporary work structures, cranes, trucks and contractors. All equipment will be handled and operated with an emphasis on public safety and protecting the environment. For your own safety, please stay out of the riverbed and keep clear of designated work areas.

Here’s what’s on the construction schedule:

Viewing Platform Construction – Upper Falls
Construction of a new viewing platform near Avista’s Upper Falls Dam in Riverfront Park will take place this summer and fall. Avista is building the platform to access the Upper Falls Dam for maintenance. Once the work is complete, park visitors will have a permanent spot to enjoy the views of the river. This project will also improve pedestrian access and the aesthetics at Riverfront Park.

Testing flows last year
Aesthetic Flows Project – north channel, Upper Falls
The goal of Avista’s aesthetic spills project is to spread water more evenly throughout the two channels of the Spokane River that run north and south of Canada Island and produce an aesthetically pleasing flow of water that viewers can enjoy throughout the year. To do this, we’ll modify the river’s channel in order to return it to a more natural state, the way it was before early developers in Spokane cut into the bedrock to collect water during dry times. This project Last year, Avista brought together several stakeholder groups, including the Washington Department of Ecology, The Sierra Club, and others, to take part in a pilot test for this project. Immediately before and during construction, Avista will not release flows into the channels to the north and south of Canada Island.

Monroe Street Dam rock removal
Generating clean, efficient power is a top priority at Avista. The high river flows this spring have caused large amounts of rocks, gravel and other materials to accumulate at the Monroe Street Dam. The excess debris can damage the intake structure and interfere with power production.

In September, the accumulated rocks and gravel will be removed from the forebay. Depending on the analysis of sampled material, the materials will then be placed back into the river below the dam. Usually this activity is done every two years, however, because of heavy water flows this year, Avista will be performing the work again this fall.
Fishery work
While fishery work may not be as visible as other activities, biologists will be doing work throughout the summer and fall in the Upper Falls and Nine Mile Reservoirs. The majority of the work this fall will involve a study to determine the population of fish in this area of the Spokane River.

In 2011, Avista will plant 6,000 catchable, sterile rainbow trout in Upper Falls Reservoir and 9,000 fish in Nine Mile Reservoir. This stocking program is intended to provide families in our community the opportunity to fish.

Stay tuned for more information about these exciting projects throughout the summer and fall. Avista has also posted signs near the project areas to educate those who pass by about what we’re doing.
Posted by  System Account  on  8/11/2011
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