SEATTLE -- The Bonneville Power Administration on Wednesday adopted rate increases for power purchased by utilities.
The average wholesale power price will increase 9 percent and the average transmission rate will increase 11 percent. The rate increases, which were expected, take effect Oct. 1.
The power rate increase will cover higher costs to operate and maintain the federal hydroelectric system, higher costs to pay for existing long-term agreements for the fish and wildlife mitigation program, and reduced revenues from surplus power sales because of low market prices.
The transmission rate increase, the first in six years, will cover costs to repair and replace aging infrastructure and pay for security requirements.