County annual report · FIPS 02020
2018 Anchorage Municipality, AK Power Outage Report
In 2018, customers in Anchorage Municipality, AK went without power for an average of 2.7 hours, a total of 300K customer-hours (Alaska average 6.2 hours). That ranks 6th worst of 7 Alaska counties and 1604th of 2,798 nationally.
Compared with AK, the US and 2017
Coverage line is EAGLE-I's share of Alaska customers tracked each year.
Biggest outages in Anchorage Municipality, 2018
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | April 24, 2018 15:30 | April 28, 2018 12:30 | 3d 21h | 16,409 | 122K |
| 2 | September 27, 2018 16:45 | September 28, 2018 00:15 | 7h 30m | 4,710 | 2,752 |
| 3 | March 9, 2018 07:00 | March 9, 2018 10:00 | 3h | 4,452 | 2,542 |
| 4 | April 3, 2018 19:15 | April 3, 2018 22:00 | 2h 45m | 4,359 | 2,337 |
| 5 | June 14, 2018 05:30 | June 14, 2018 15:30 | 10h | 3,264 | 8,633 |
| 6 | November 26, 2018 07:15 | November 26, 2018 12:15 | 5h | 2,995 | 6,550 |
| 7 | August 23, 2018 09:45 | August 23, 2018 23:45 | 14h | 2,152 | 13K |
| 8 | May 25, 2018 16:30 | May 26, 2018 01:30 | 9h | 2,112 | 1,111 |
| 9 | March 12, 2018 20:15 | March 12, 2018 20:30 | 15m | 2,084 | 521 |
| 10 | January 22, 2018 17:45 | January 22, 2018 22:30 | 4h 45m | 1,911 | 485 |
Outage episodes by size in 2018: 101 reached 100+ customers, 26 reached 1,000+ customers, 1 reached 10,000+ customers.
Utility reliability filed with the EIA
SAIDI (average outage time per customer) and SAIFI (average interruptions per customer) that utilities serving Anchorage Municipality reported on EIA Form 861 for 2018, or their most recent earlier filing. Utility-wide figures, not county-specific.
| Utility | EIA year | SAIDI | SAIFI | SAIDI excl. major events | SAIFI excl. major events |
|---|---|---|---|---|---|
| Chugach Electric Assn Inc | 2018 | 3.8 hrs | 1.81 | - | - |
| Matanuska Electric Assn Inc | 2018 | 8.5 hrs | 3.38 | 3.7 hrs | 2.24 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 67% of Alaska's customers in 2018; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 110,430 customers (ORNL modeled county customer count), including major storm days. It is comparable across counties but is not the SAIDI a utility files.
- An outage event is a continuous stretch with customers out; counts at 100, 1,000 and 10,000+ use its peak.
- Years loaded: 2015–2025. Anchorage Municipality has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Anchorage Municipality, AK annual power outage report, 2018, data as of Oct 3, 2026 02:41 UTC, sources: DOE EAGLE-I (https://eagle-i.doe.gov/); EAGLE-I modeled customer counts (MCC) (https://figshare.com/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2018/alaska/anchorage-municipality