massoutage

County annual report · FIPS 38087

2023 Slope County, ND Power Outage Report

In 2023, customers in Slope County, ND went without power for an average of 0.0 hours, a total of 4 customer-hours (North Dakota average 4.1 hours). That ranks 51st worst of 51 North Dakota counties and 2961st of 2,977 nationally.

Summary data CSVJSON
Avg hrs / customer
0.0
467 customers
Customer-hours out
4
Peak customers out
5
Outages ≥1,000 out
0
0 of 10,000+ · 2 total
Longest outage
30m
began April 6, 2023
Rank in state
51st/51
2961st of 2,977 US

Compared with ND, the US and 2021

Slope County, ND average hours without power per customer compared with state and national averages, 2023Slope County 0.0 hours, North Dakota average 4.1 hours, US average 7.1 hours, Slope County, 2021 0.2 hoursSlope CountySlope County0.0hNorth Dakota averageNorth Dakota average4.1hUS averageUS average7.1hSlope County, 2021Slope County, 20210.2h
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Average hours without power per customer in 2023; last bar is this county in 2021.

Month by month

CSVJSON
Slope County, ND customer-hours without power by month, 2023Jan 0, Feb 0, Mar 0, Apr 4, May 0, Jun 0, Jul 0, Aug 0, Sep 0, Oct 0, Nov 0, Dec 0012340Jan0Feb0Mar4Apr0May0Jun0Jul0Aug0Sep0Oct0Nov0Dec
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Customer-hours; April 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, 2023

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

CSVJSON
#Started (UTC)Ended (UTC)DurationPeak outCustomer-hours
1April 6, 2023 19:00April 6, 2023 19:3030m53
2April 6, 2023 20:30April 6, 2023 20:4515m51

Outage episodes by size in 2023: 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 Slope County reported on EIA Form 861 for 2023, 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 n/a of North Dakota's customers in 2023; 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, 2023, 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/2023/north-dakota/slope-county

summary CSVJSONyears CSVJSONmonths CSVJSONevents CSVJSONutilities CSVJSON
Slope County by year:2025202420212019
Live outages in Slope County2023 North Dakota report2023 US report