massoutage

County annual report · FIPS 38087

2019 Slope County, ND Power Outage Report

In 2019, customers in Slope County, ND went without power for an average of 0.6 hours, a total of 285 customer-hours (North Dakota average 1.1 hours). That ranks 13th worst of 35 North Dakota counties and 2645th of 2,945 nationally.

Summary data CSVJSON
Avg hrs / customer
0.6
467 customers
Customer-hours out
285
Peak customers out
115
Outages ≥1,000 out
0
0 of 10,000+ · 2 total
Longest outage
2h 15m
began July 9, 2019
Rank in state
13th/35
2645th of 2,945 US

Compared with ND, the US

Slope County, ND average hours without power per customer compared with state and national averages, 2019Slope County 0.6 hours, North Dakota average 1.1 hours, US average 4.7 hoursSlope CountySlope County0.6hNorth Dakota averageNorth Dakota average1.1hUS averageUS average4.7h
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Average hours without power per customer in 2019.

Month by month

CSVJSON
Slope County, ND customer-hours without power by month, 2019Jan 0, Feb 0, Mar 0, Apr 0, May 0, Jun 0, Jul 256, Aug 0, Sep 29, Oct 0, Nov 0, Dec 001002003000Jan0Feb0Mar0Apr0May0Jun256Jul0Aug29Sep0Oct0Nov0Dec
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Customer-hours; July was the worst month.

Slope County year over year

CSVJSON
Slope County, ND: average hours without power per customer by year2015: no data; 2016: no data; 2017: no data; 2018: no data; 2019: 0.6h, coverage 53%; 2020: no data; 2021: 0.2h, coverage 66%; 2022: no data; 2023: 0.0h; 2024: 0.8h; 2025: 0.8h00.30.50.810%50%100%n/a2015n/a2016n/a2017n/a20180.6h2019n/a20200.2h2021n/a20220.0h20230.8h20240.8h2025
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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 North Dakota customers tracked each year.

Biggest outages in Slope County, 2019

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

CSVJSON
#Started (UTC)Ended (UTC)DurationPeak outCustomer-hours
1July 9, 2019 03:15July 9, 2019 05:302h 15m115256
2September 11, 2019 20:00September 11, 2019 20:1515m11429

Outage episodes by size in 2019: 2 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 Slope 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
Montana-Dakota Utilities Co-----
Roughrider Electric Cooperativ-----
Goldenwest Electric Coop, Inc-----
Slope 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 53% of North Dakota's customers in 2019; utilities it does not see are not counted.
  • Hours per customer = outage customer-minutes ÷ 467 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. Slope County has data for 2019, 2021, 2023–2025.

Cite this report

MassOutage (massoutage.com), Slope County, ND 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/). https://massoutage.com/reports/2019/north-dakota/slope-county

summary CSVJSONyears CSVJSONmonths CSVJSONevents CSVJSONutilities CSVJSON
Slope County by year:2025202420232021
Live outages in Slope County2019 North Dakota report2019 US report