massoutage

County annual report · FIPS 30073

2019 Pondera County, MT Power Outage Report

In 2019, customers in Pondera County, MT went without power for an average of 0.1 hours, a total of 107 customer-hours (Montana average 0.6 hours). That ranks 22nd worst of 38 Montana counties and 2847th of 2,945 nationally.

Summary data CSVJSON
Avg hrs / customer
0.1
2,031 customers
Customer-hours out
107
Peak customers out
18
Outages ≥1,000 out
0
0 of 10,000+ · 1 total
Longest outage
7h 15m
began December 26, 2019
Rank in state
22nd/38
2847th of 2,945 US

Compared with MT, the US

Pondera County, MT average hours without power per customer compared with state and national averages, 2019Pondera County 0.1 hours, Montana average 0.6 hours, US average 4.7 hoursPondera CountyPondera County0.1hMontana averageMontana average0.6hUS averageUS average4.7h
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Average hours without power per customer in 2019.

Month by month

CSVJSON
Pondera County, MT customer-hours without power by month, 2019Jan 0, Feb 0, Mar 0, Apr 0, May 0, Jun 0, Jul 0, Aug 0, Sep 0, Oct 0, Nov 0, Dec 1070501001500Jan0Feb0Mar0Apr0May0Jun0Jul0Aug0Sep0Oct0Nov107Dec
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Customer-hours; December was the worst month.

Pondera County year over year

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Pondera County, MT: average hours without power per customer by year2015: no data; 2016: no data; 2017: no data; 2018: no data; 2019: 0.1h, coverage 75%; 2020: 14.3h, coverage 76%; 2021: 5.8h, coverage 76%; 2022: 4.8h, coverage 76%; 2023: 1.9h; 2024: 8.1h; 2025: 11.3h0510150%50%100%n/a2015n/a2016n/a2017n/a20180.1h201914.3h20205.8h20214.8h20221.9h20238.1h202411.3h2025
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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 Pondera County, 2019

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

CSVJSON
#Started (UTC)Ended (UTC)DurationPeak outCustomer-hours
1December 26, 2019 03:45December 26, 2019 11:007h 15m18107

Outage episodes by size in 2019: 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 Pondera County reported on EIA Form 861 for 2019, 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)20181.7 hrs1.081.7 hrs1.08
WAPA-- Western Area Power Administration-----
Sun River Electric Coop, Inc-----
Glacier Electric Coop, Inc-----
Marias River 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 75% of Montana's customers in 2019; utilities it does not see are not counted.
  • Hours per customer = outage customer-minutes ÷ 2,031 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. Pondera County has data for 2019–2025.

Cite this report

MassOutage (massoutage.com), Pondera County, MT annual power outage report, 2019, 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/2019/montana/pondera-county

summary CSVJSONyears CSVJSONmonths CSVJSONevents CSVJSONutilities CSVJSON
Pondera County by year:202520242023202220212020
Live outages in Pondera County2019 Montana report2019 US report