massoutage

County annual report · FIPS 46063

2018 Harding County, SD Power Outage Report

In 2018, customers in Harding County, SD went without power for an average of 0.0 hours, a total of 7 customer-hours (South Dakota average 1.1 hours). That ranks 29th worst of 30 South Dakota counties and 2727th of 2,798 nationally.

Summary data CSVJSON
Avg hrs / customer
0.0
403 customers
Customer-hours out
7
Peak customers out
9
Outages ≥1,000 out
0
0 of 10,000+ · 1 total
Longest outage
45m
began July 31, 2018
Rank in state
29th/30
2727th of 2,798 US

Compared with SD, the US and 2017

Harding County, SD average hours without power per customer compared with state and national averages, 2018Harding County 0.0 hours, South Dakota average 1.1 hours, US average 5.6 hours, Harding County, 2017 0.1 hoursHarding CountyHarding County0.0hSouth Dakota averageSouth Dakota average1.1hUS averageUS average5.6hHarding County, 2017Harding County, 20170.1h
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Average hours without power per customer in 2018; last bar is this county in 2017.

Month by month

CSVJSON
Harding County, SD customer-hours without power by month, 2018Jan 0, Feb 0, Mar 0, Apr 0, May 0, Jun 0, Jul 7, Aug 0, Sep 0, Oct 0, Nov 0, Dec 0024680Jan0Feb0Mar0Apr0May0Jun7Jul0Aug0Sep0Oct0Nov0Dec
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Customer-hours; July was the worst month.

Harding County year over year

CSVJSON
Harding County, SD: average hours without power per customer by year2015: no data; 2016: no data; 2017: 0.1h; 2018: 0.0h, coverage 46%; 2019: 16.2h, coverage 87%; 2020: 90.2h, coverage 79%; 2021: 107.7h, coverage 79%; 2022: 88.9h, coverage 89%; 2023: 31.1h; 2024: 47.6h; 2025: 48.8h0501001500%50%100%n/a2015n/a20160.1h20170.0h201816.2h201990.2h2020107.7h202188.9h202231.1h202347.6h202448.8h2025
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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 South Dakota customers tracked each year.

Biggest outages in Harding County, 2018

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

CSVJSON
#Started (UTC)Ended (UTC)DurationPeak outCustomer-hours
1July 31, 2018 17:15July 31, 2018 18:0045m97

Outage episodes by size in 2018: 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 Harding County reported on EIA Form 861 for 2018, 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-----
Grand 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 46% of South Dakota's customers in 2018; utilities it does not see are not counted.
  • Hours per customer = outage customer-minutes ÷ 403 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. Harding County has data for 2017–2025.

Cite this report

MassOutage (massoutage.com), Harding County, SD annual power outage report, 2018, 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/2018/south-dakota/harding-county

summary CSVJSONyears CSVJSONmonths CSVJSONevents CSVJSONutilities CSVJSON
Harding County by year:20252024202320222021202020192017
Live outages in Harding County2018 South Dakota report2018 US report