County annual report · FIPS 30021
2021 Dawson County, MT Power Outage Report
In 2021, customers in Dawson County, MT went without power for an average of 1.5 hours, a total of 11K customer-hours (Montana average 5.0 hours). That ranks 42nd worst of 51 Montana counties and 2464th of 2,974 nationally.
Compared with MT, the US and 2020
Coverage line is EAGLE-I's share of Montana customers tracked each year.
Biggest outages in Dawson County, 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 13, 2021 12:00 | October 15, 2021 13:15 | 2d 1h | 2,570 | 9,428 |
| 2 | June 11, 2021 02:45 | June 11, 2021 04:30 | 1h 45m | 321 | 536 |
| 3 | November 10, 2021 20:30 | November 10, 2021 21:30 | 1h | 139 | 111 |
| 4 | July 3, 2021 00:15 | July 3, 2021 01:30 | 1h 15m | 116 | 96 |
| 5 | May 12, 2021 06:45 | May 12, 2021 08:45 | 2h | 95 | 42 |
| 6 | April 5, 2021 04:30 | April 5, 2021 07:30 | 3h | 74 | 222 |
| 7 | April 5, 2021 18:00 | April 5, 2021 18:30 | 30m | 66 | 33 |
| 8 | April 9, 2021 01:00 | April 9, 2021 01:45 | 45m | 65 | 25 |
| 9 | January 15, 2021 17:30 | January 15, 2021 21:15 | 3h 45m | 46 | 152 |
| 10 | December 28, 2021 19:15 | December 28, 2021 19:30 | 15m | 38 | 10 |
Outage episodes by size in 2021: 4 reached 100+ customers, 1 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 Dawson County 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 |
|---|---|---|---|---|---|
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Montana-Dakota Utilities Co | - | - | - | - | - |
| McCone Electric Coop Inc | - | - | - | - | - |
| Tongue River Electric Coop Inc | - | - | - | - | - |
| Goldenwest Electric Coop, Inc | - | - | - | - | - |
| Lower Yellowstone R E A, Inc | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 76% of Montana's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 7,435 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. Dawson County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Dawson County, MT 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/). https://massoutage.com/reports/2021/montana/dawson-county