massoutage

County annual report · FIPS 30061

2017 Mineral County, MT Power Outage Report

In 2017, customers in Mineral County, MT went without power for an average of 0.0 hours, a total of 22 customer-hours (Montana average 2.7 hours). That ranks 19th worst of 19 Montana counties and 2698th of 2,786 nationally.

Summary data CSVJSON
Avg hrs / customer
0.0
2,455 customers
Customer-hours out
22
Peak customers out
8
Outages ≥1,000 out
0
0 of 10,000+ · 1 total
Longest outage
2h 45m
began December 29, 2017
Rank in state
19th/19
2698th of 2,786 US

Compared with MT, the US

Mineral County, MT average hours without power per customer compared with state and national averages, 2017Mineral County 0.0 hours, Montana average 2.7 hours, US average 7.4 hoursMineral CountyMineral County0.0hMontana averageMontana average2.7hUS averageUS average7.4h
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Average hours without power per customer in 2017.

Month by month

CSVJSON
Mineral County, MT customer-hours without power by month, 2017Jan 0, Feb 0, Mar 0, Apr 0, May 0, Jun 0, Jul 0, Aug 0, Sep 0, Oct 0, Nov 0, Dec 2201020300Jan0Feb0Mar0Apr0May0Jun0Jul0Aug0Sep0Oct0Nov22Dec
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Customer-hours; December was the worst month.

Mineral County year over year

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Mineral County, MT: average hours without power per customer by year2015: no data; 2016: no data; 2017: 0.0h; 2018: 0.0h, coverage 16%; 2019: 1.0h, coverage 75%; 2020: 2.9h, coverage 76%; 2021: 47.2h, coverage 76%; 2022: 12.0h, coverage 76%; 2023: 3.8h; 2024: 18.8h; 2025: 82.3h02550751000%50%100%n/a2015n/a20160.0h20170.0h20181.0h20192.9h202047.2h202112.0h20223.8h202318.8h202482.3h2025
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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 Mineral County, 2017

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

CSVJSON
#Started (UTC)Ended (UTC)DurationPeak outCustomer-hours
1December 29, 2017 17:00December 29, 2017 19:452h 45m822

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 Mineral County reported on EIA Form 861 for 2017, or their most recent earlier filing. Utility-wide figures, not county-specific.

CSVJSON
UtilityEIA yearSAIDISAIFISAIDI excl. major eventsSAIFI excl. major events
NorthWestern Energy LLC - (MT)20172.6 hrs1.382.4 hrs1.30
Missoula Electric Coop, Inc201711.8 hrs2.544.3 hrs1.88
Bonneville Power Administration-----

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 ÷ 2,455 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. Mineral County has data for 2017–2025.

Cite this report

MassOutage (massoutage.com), Mineral 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/mineral-county

summary CSVJSONyears CSVJSONmonths CSVJSONevents CSVJSONutilities CSVJSON
Mineral County by year:20252024202320222021202020192018
Live outages in Mineral County2017 Montana report2017 US report