County annual report · FIPS 46081
2021 Lawrence County, SD Power Outage Report
In 2021, customers in Lawrence County, SD went without power for an average of 3.7 hours, a total of 58K customer-hours (South Dakota average 3.4 hours). That ranks 21st worst of 61 South Dakota counties and 1620th of 2,974 nationally.
Compared with SD, the US and 2020
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Lawrence County, 2021
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | October 12, 2021 19:15 | October 14, 2021 17:00 | 1d 21h | 5,448 | 6,773 |
| 2 | July 3, 2021 08:00 | July 3, 2021 12:00 | 4h | 1,804 | 7,214 |
| 3 | April 7, 2021 02:15 | April 7, 2021 19:15 | 17h | 1,797 | 1,045 |
| 4 | June 13, 2021 07:00 | June 13, 2021 10:30 | 3h 30m | 1,231 | 3,120 |
| 5 | July 6, 2021 00:45 | July 6, 2021 21:00 | 20h 15m | 996 | 19K |
| 6 | May 18, 2021 15:45 | May 18, 2021 20:45 | 5h | 487 | 2,254 |
| 7 | February 12, 2021 18:30 | February 12, 2021 20:45 | 2h 15m | 472 | 522 |
| 8 | November 8, 2021 17:45 | November 8, 2021 18:15 | 30m | 330 | 165 |
| 9 | January 14, 2021 13:00 | January 14, 2021 23:00 | 10h | 272 | 1,374 |
| 10 | January 14, 2021 07:30 | January 14, 2021 09:15 | 1h 45m | 234 | 211 |
Outage episodes by size in 2021: 24 reached 100+ customers, 4 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 Lawrence County reported on EIA Form 861 for 2021, 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 |
|---|---|---|---|---|---|
| Black Hills Power, Inc. | 2021 | 2.6 hrs | 1.17 | 41 min | 0.32 |
| Black Hills Electric Coop, Inc | 2021 | 6.6 hrs | 1.67 | 2.2 hrs | 1.02 |
| Black Hills Energy | - | - | - | - | - |
| Butte 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 79% of South Dakota's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 15,540 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. Lawrence County has data for 2016–2025.
Cite this report
MassOutage (massoutage.com), Lawrence County, SD annual power outage report, 2021, 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/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2021/south-dakota/lawrence-county