County annual report · FIPS 46017
2019 Buffalo County, SD Power Outage Report
In 2019, customers in Buffalo County, SD went without power for an average of 1.6 hours, a total of 931 customer-hours (South Dakota average 3.8 hours). That ranks 26th worst of 58 South Dakota counties and 2250th of 2,945 nationally.
Compared with SD, the US
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Buffalo County, 2019
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | August 2, 2019 11:30 | August 2, 2019 14:45 | 3h 15m | 165 | 334 |
| 2 | September 9, 2019 20:45 | September 9, 2019 21:45 | 1h | 34 | 26 |
| 3 | November 30, 2019 22:45 | December 1, 2019 02:00 | 3h 15m | 29 | 53 |
| 4 | August 7, 2019 01:00 | August 7, 2019 15:00 | 14h | 25 | 45 |
| 5 | July 30, 2019 17:00 | July 30, 2019 18:30 | 1h 30m | 17 | 22 |
| 6 | December 1, 2019 13:45 | December 1, 2019 17:00 | 3h 15m | 14 | 33 |
| 7 | December 27, 2019 20:00 | December 27, 2019 21:00 | 1h | 14 | 14 |
| 8 | December 26, 2019 18:30 | December 26, 2019 20:45 | 2h 15m | 12 | 23 |
| 9 | July 20, 2019 11:15 | July 20, 2019 14:30 | 3h 15m | 4 | 9 |
| 10 | August 18, 2019 00:30 | August 18, 2019 03:15 | 2h 45m | 3 | 6 |
Outage episodes by size in 2019: 1 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 Buffalo County reported on EIA Form 861 for 2019, or their most recent earlier filing. Utility-wide figures, not county-specific.
| Utility | EIA year | SAIDI | SAIFI | SAIDI excl. major events | SAIFI excl. major events |
|---|---|---|---|---|---|
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Dakota Energy Coop Inc | - | - | - | - | - |
| Central Electric Coop, Inc - (SD) | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 87% of South Dakota's customers in 2019; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 592 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. Buffalo County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Buffalo County, SD 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/south-dakota/buffalo-county