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Avista continues projects at Upper Falls and Monroe Street Dams in downtown Spokane
This week’s activities include rock removal, aesthetic spill pilot test

August 10, 2010
: Locals and visitors to downtown Spokane will continue to see activity on the Spokane River for the next several weeks, as Avista performs work on several projects designed to protect and enhance fish, wildlife, water quality, recreation, cultural and aesthetic resources related to its Spokane River hydroelectric project.


This week, the removal of accumulated rock, gravel and sediment at Monroe Street Dam will continue, with the materials to be relocated over the dam and back into the river. Analytical results of materials sampled in July indicated that sediments were within Washington’s acceptable levels 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.


Next week a second crane will be placed along the north shore of the river near the Howard Street Bridge, for a pilot study to determine whether channel modifications can be made to enhance aesthetic flows in the north and middle channels during periods of low river flow. Aesthetic flows at Upper Falls Dam will be temporarily interrupted throughout the month, starting on August 15. This project is required as part of Avista’s 50-year Federal Energy Regulatory Commission license to operate its five hydroelectric dams on the Spokane River (Post Falls, Upper Falls, Monroe Street, Nine Mile Falls and Long Lake), which was issued last year.


Visitors to the stretch of river between Upper Falls and Monroe Street Dams will continue to see equipment and temporary work structures in and around the river channels in August and September.


Avista Corp. is an energy company involved in the production, transmission and distribution of energy as well as other energy-related businesses. Avista Utilities is our operating division that provides electric service to 355,000 customers and natural gas to 315,000 customers. Our service territory covers 30,000 square miles in eastern Washington, northern Idaho and parts of southern and eastern Oregon, with a population of 1.5 million. Avista's primary, non-regulated subsidiary is Advantage IQ. Our stock is traded under the ticker symbol "AVA." For more information about Avista, please visit www.avistacorp.com.

Avista Corp. and the Avista Corp. logo are trademarks of Avista Corporation.

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