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Low runoff cuts hydroelectric power revenue forecasts

The Bonneville Power Administration has reduced its expectations for hydroelectric power revenue this year by more than $200 million because of new forecasts for a continued depressed runoff in the Columbia Basin.

Based on the forecasts, Bonneville Power now estimates it will finish the fiscal year with a loss of $6 million in modified net revenues instead of the $231.9 million in positive revenues projected at the start of the fiscal year in October, the Portland-based entity said in a release. Bonneville markets power from dams in the Federal Columbia River Power System, and water serves as the fuel that turns hydroelectric turbines. Its customers include utilities that serve Idaho.

The Bonneville Power Administration (BPA) compiled the new estimates as part of its Quarterly Business Review. However, runoff projections have further declined since the estimates were developed.

“This is a very serious decline that impacts our power supply and therefore our finances,” BPA Administrator Steve Wright said. “We’re hopeful that the outlook will improve, but we cannot count on it. The reality is that water is the fuel that provides much of the Northwest’s electricity.”

The reduced estimates result from a persistent El Niño weather pattern that has brought unusually dry conditions to the Northwest, BPA said. The February forecast from the National Weather Service’s Northwest River Forecast Center called for 79.2 million acre-feet of runoff from January through July as traditionally measured at The Dalles, Ore. That represents 74 percent of the 30-year average of 107.3 MAF and would be the lowest runoff since 2001, BPA said.

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