Avista Corp, WA
Avista Corp's outage record
Avista Corp customers in Washington had 1 interruptions last year, 3.3 hours without power in total - above the typical US utility's outage time by about 1.2×. That is 48% less outage time than the Washington state average of 6.4 hours a year.
How long a single Avista Corp outage runs
Outages here average 3.4 hours before power returns. At that length, continuous fuel supply matters more than stored capacity, which favors a standby generator over anything battery-based. Why outage length, not count, picks the backup: how often vs how long.
The generator question for Avista Corp
Serving 277,040 customers here, Avista Corp customers lose more power than most of the country sees, so a generator is worth getting rather than an overreaction.
How Avista Corp's record was measured
Avista Corp filed these numbers itself, as an investor-owned utility, under EIA Form 861 - a federal reliability report covering its entire Washington territory, serving 277,040 customers here, not a single street or outage. Every other utility in Washington is covered too: see Washington's full record. How the verdict bands are set is in the methodology.