massoutage

County annual report · FIPS 30011

2022 Carter County, MT Power Outage Report

In 2022, customers in Carter County, MT went without power for an average of 0.0 hours, a total of 0 customer-hours (Montana average 3.5 hours). That ranks 50th worst of 50 Montana counties and 2974th of 2,976 nationally.

Summary data CSVJSON
Avg hrs / customer
0.0
508 customers
Customer-hours out
0
Peak customers out
1
Outages ≥1,000 out
0
0 of 10,000+ · 1 total
Longest outage
15m
began June 12, 2022
Rank in state
50th/50
2974th of 2,976 US

Compared with MT, the US and 2021

Carter County, MT average hours without power per customer compared with state and national averages, 2022Carter County 0.0 hours, Montana average 3.5 hours, US average 8.3 hours, Carter County, 2021 0.0 hoursCarter CountyCarter County0.0hMontana averageMontana average3.5hUS averageUS average8.3hCarter County, 2021Carter County, 20210.0h
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Average hours without power per customer in 2022; last bar is this county in 2021.

Month by month

CSVJSON
Carter County, MT customer-hours without power by month, 2022Jan 0, Feb 0, Mar 0, Apr 0, May 0, Jun 0, Jul 0, Aug 0, Sep 0, Oct 0, Nov 0, Dec 000.30.50.810Jan0Feb0Mar0Apr0May0Jun0Jul0Aug0Sep0Oct0Nov0Dec
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Customer-hours; June was the worst month.

Carter County year over year

CSVJSON
Carter County, MT: average hours without power per customer by year2015: no data; 2016: 0.0h; 2017: 0.0h; 2018: 0.1h, coverage 16%; 2019: 0.0h, coverage 75%; 2020: no data; 2021: 0.0h, coverage 76%; 2022: 0.0h, coverage 76%; 2023: no data; 2024: 0.1h; 2025: 0.0h0000.10.10%50%100%n/a20150.0h20160.0h20170.1h20180.0h2019n/a20200.0h20210.0h2022n/a20230.1h20240.0h2025
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Average hours without power per customer. Line: EAGLE-I coverage, share of customers tracked (right axis).

Coverage line is EAGLE-I's share of Montana customers tracked each year.

Biggest outages in Carter County, 2022

The 1 outage episodes with the most customers out at once. Times are UTC.

CSVJSON
#Started (UTC)Ended (UTC)DurationPeak outCustomer-hours
1June 12, 2022 23:15June 12, 2022 23:3015m10

Outage episodes by size in 2022: 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 2022, or their most recent earlier filing. Utility-wide figures, not county-specific.

CSVJSON
UtilityEIA yearSAIDISAIFISAIDI excl. major eventsSAIFI excl. major events
Black Hills Power, Inc.20221.8 hrs0.881.6 hrs0.85
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 76% of Montana's customers in 2022; 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, 2022, 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/2022/montana/carter-county

summary CSVJSONyears CSVJSONmonths CSVJSONevents CSVJSONutilities CSVJSON
Carter County by year:2025202420212019201820172016
Live outages in Carter County2022 Montana report2022 US report