massoutage

County annual report · FIPS 46063

2017 Harding County, SD Power Outage Report

In 2017, customers in Harding County, SD went without power for an average of 0.1 hours, a total of 21 customer-hours (South Dakota average 0.8 hours). That ranks 25th worst of 26 South Dakota counties and 2626th of 2,786 nationally.

Summary data CSVJSON
Avg hrs / customer
0.1
403 customers
Customer-hours out
21
Peak customers out
65
Outages ≥1,000 out
0
0 of 10,000+ · 2 total
Longest outage
2h 15m
began May 31, 2017
Rank in state
25th/26
2626th of 2,786 US

Compared with SD, the US

Harding County, SD average hours without power per customer compared with state and national averages, 2017Harding County 0.1 hours, South Dakota average 0.8 hours, US average 7.4 hoursHarding CountyHarding County0.1hSouth Dakota averageSouth Dakota average0.8hUS averageUS average7.4h
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Average hours without power per customer in 2017.

Month by month

CSVJSON
Harding County, SD customer-hours without power by month, 2017Jan 0, Feb 0, Mar 0, Apr 0, May 21, Jun 0, Jul 0, Aug 0, Sep 0, Oct 0, Nov 0, Dec 001020300Jan0Feb0Mar0Apr21May0Jun0Jul0Aug0Sep0Oct0Nov0Dec
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Customer-hours; May 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, 2017

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

CSVJSON
#Started (UTC)Ended (UTC)DurationPeak outCustomer-hours
1May 14, 2017 03:45May 14, 2017 04:0015m6516
2May 31, 2017 15:30May 31, 2017 17:452h 15m25

Outage episodes by size in 2017: 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 2017, 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 n/a of South Dakota's customers in 2017; 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, 2017, 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/2017/south-dakota/harding-county

summary CSVJSONyears CSVJSONmonths CSVJSONevents CSVJSONutilities CSVJSON
Harding County by year:20252024202320222021202020192018
Live outages in Harding County2017 South Dakota report2017 US report