County annual report · FIPS 30011
2017 Carter County, MT Power Outage Report
In 2017, customers in Carter County, MT went without power for an average of 0.0 hours, a total of 8 customer-hours (Montana average 2.7 hours). That ranks 18th worst of 19 Montana counties and 2684th of 2,786 nationally.
Compared with MT, the US and 2016
Coverage line is EAGLE-I's share of Montana customers tracked each year.
Biggest outages in Carter County, 2017
The 2 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | July 6, 2017 16:30 | July 6, 2017 20:00 | 3h 30m | 1 | 4 |
| 2 | July 13, 2017 16:15 | July 13, 2017 21:00 | 4h 45m | 1 | 5 |
Outage episodes by size in 2017: 0 reached 100+ customers, 0 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 Carter 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 |
|---|---|---|---|---|---|
| Black Hills Power, Inc. | 2017 | 6.3 hrs | 1.90 | 68 min | 0.58 |
| Tongue River Electric Coop Inc | - | - | - | - | - |
| Grand Electric Coop, Inc | - | - | - | - | - |
| Southeast Electric Coop, 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 ÷ 508 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. Carter County has data for 2016–2019, 2021–2022, 2024–2025.
Cite this report
MassOutage (massoutage.com), Carter 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/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2017/montana/carter-county