County annual report · FIPS 30021
2017 Dawson County, MT Power Outage Report
In 2017, customers in Dawson County, MT went without power for an average of 0.9 hours, a total of 6,443 customer-hours (Montana average 2.7 hours). That ranks 13th worst of 19 Montana counties and 2106th of 2,786 nationally.
Compared with MT, the US
Coverage line is EAGLE-I's share of Montana customers tracked each year.
Biggest outages in Dawson County, 2017
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | May 25, 2017 01:00 | May 25, 2017 09:15 | 8h 15m | 2,586 | 1,318 |
| 2 | October 18, 2017 16:15 | October 18, 2017 17:15 | 1h | 524 | 524 |
| 3 | July 17, 2017 01:30 | July 17, 2017 04:30 | 3h | 223 | 604 |
| 4 | September 14, 2017 15:00 | September 14, 2017 15:30 | 30m | 214 | 55 |
| 5 | May 19, 2017 23:45 | May 20, 2017 01:00 | 1h 15m | 111 | 139 |
| 6 | December 28, 2017 14:15 | December 28, 2017 20:00 | 5h 45m | 79 | 422 |
| 7 | September 3, 2017 23:15 | September 4, 2017 06:30 | 7h 15m | 64 | 190 |
| 8 | October 9, 2017 22:00 | October 10, 2017 00:45 | 2h 45m | 60 | 60 |
| 9 | June 9, 2017 19:45 | June 9, 2017 21:45 | 2h | 47 | 18 |
| 10 | December 3, 2017 06:45 | December 3, 2017 08:00 | 1h 15m | 46 | 58 |
Outage episodes by size in 2017: 5 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 2017, 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 n/a of Montana's customers in 2017; 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, 2017, 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/2017/montana/dawson-county