County annual report · FIPS 02068
2021 Denali Borough, AK Power Outage Report
In 2021, customers in Denali Borough, AK went without power for an average of 23.2 hours, a total of 23K customer-hours (Alaska average 7.0 hours). That ranks 1st worst of 7 Alaska counties and 367th of 2,974 nationally.
Compared with AK, the US and 2020
Coverage line is EAGLE-I's share of Alaska customers tracked each year.
Biggest outages in Denali Borough, 2021
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | October 27, 2021 00:00 | October 27, 2021 01:30 | 1h 30m | 1,148 | 578 |
| 2 | December 26, 2021 16:30 | December 27, 2021 21:30 | 1d 5h | 1,028 | 14K |
| 3 | June 3, 2021 19:00 | June 3, 2021 20:00 | 1h | 791 | 595 |
| 4 | December 29, 2021 14:45 | December 30, 2021 08:00 | 17h 15m | 411 | 273 |
| 5 | December 10, 2021 20:30 | December 10, 2021 20:45 | 15m | 407 | 102 |
| 6 | December 11, 2021 03:00 | December 11, 2021 03:15 | 15m | 407 | 102 |
| 7 | December 28, 2021 09:45 | December 28, 2021 11:15 | 1h 30m | 407 | 611 |
| 8 | December 29, 2021 08:45 | December 29, 2021 10:30 | 1h 45m | 361 | 631 |
| 9 | December 6, 2021 02:00 | December 6, 2021 02:45 | 45m | 307 | 230 |
| 10 | December 16, 2021 11:15 | December 16, 2021 11:30 | 15m | 306 | 77 |
Outage episodes by size in 2021: 16 reached 100+ customers, 2 reached 1,000+ customers, 0 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 Denali Borough reported on EIA Form 861 for 2021, 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 |
|---|---|---|---|---|---|
| Golden Valley Elec Assn Inc | 2021 | 12.3 hrs | 2.98 | 4.5 hrs | 2.20 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 68% of Alaska's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 1,014 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. Denali Borough has data for 2016–2025.
Cite this report
MassOutage (massoutage.com), Denali Borough, AK annual power outage report, 2021, 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/2021/alaska/denali-borough