massoutage

County annual report · FIPS 30075

2016 Powder River County, MT Power Outage Report

In 2016, customers in Powder River County, MT went without power for an average of 0.1 hours, a total of 81 customer-hours (Montana average 1.8 hours). That ranks 5th worst of 8 Montana counties and 2206th of 2,391 nationally.

Summary data CSVJSON
Avg hrs / customer
0.1
583 customers
Customer-hours out
81
Peak customers out
33
Outages ≥1,000 out
0
0 of 10,000+ · 2 total
Longest outage
1h 45m
began July 16, 2016
Rank in state
5th/8
2206th of 2,391 US

Compared with MT, the US

Powder River County, MT average hours without power per customer compared with state and national averages, 2016Powder River County 0.1 hours, Montana average 1.8 hours, US average 3.9 hoursPowder River CountyPowder River County0.1hMontana averageMontana average1.8hUS averageUS average3.9h
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Average hours without power per customer in 2016.

Month by month

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Powder River County, MT customer-hours without power by month, 2016Jan 0, Feb 0, Mar 0, Apr 0, May 0, Jun 0, Jul 58, Aug 0, Sep 23, Oct 0, Nov 0, Dec 002040600Jan0Feb0Mar0Apr0May0Jun58Jul0Aug23Sep0Oct0Nov0Dec
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Customer-hours; July was the worst month.

Powder River County year over year

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Powder River County, MT: average hours without power per customer by year2015: no data; 2016: 0.1h; 2017: 1.0h; 2018: 0.2h, coverage 16%; 2019: 0.2h, coverage 75%; 2020: 0.1h, coverage 76%; 2021: 1.0h, coverage 76%; 2022: 2.3h, coverage 76%; 2023: 0.7h; 2024: 2.1h; 2025: 1.3h01230%50%100%n/a20150.1h20161.0h20170.2h20180.2h20190.1h20201.0h20212.3h20220.7h20232.1h20241.3h2025
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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 Powder River County, 2016

The 2 outage episodes with the most customers out at once. Times are UTC.

CSVJSON
#Started (UTC)Ended (UTC)DurationPeak outCustomer-hours
1July 16, 2016 23:30July 17, 2016 01:151h 45m3358
2September 23, 2016 23:30September 24, 2016 00:301h3123

Outage episodes by size in 2016: 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 Powder River County reported on EIA Form 861 for 2016, 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.20161.8 hrs1.4236 min0.69
Powder River Energy Corp20163.2 hrs1.793.2 hrs1.79
Tongue River 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 2016; utilities it does not see are not counted.
  • Hours per customer = outage customer-minutes ÷ 583 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. Powder River County has data for 2016–2025.

Cite this report

MassOutage (massoutage.com), Powder River County, MT annual power outage report, 2016, 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/2016/montana/powder-river-county

summary CSVJSONyears CSVJSONmonths CSVJSONevents CSVJSONutilities CSVJSON
Powder River County by year:202520242023202220212020201920182017
Live outages in Powder River County2016 Montana report2016 US report