County annual report · FIPS 46081
2020 Lawrence County, SD Power Outage Report
In 2020, customers in Lawrence County, SD went without power for an average of 4.4 hours, a total of 69K customer-hours (South Dakota average 4.6 hours). That ranks 28th worst of 62 South Dakota counties and 1512th of 3,019 nationally.
Compared with SD, the US and 2019
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Lawrence County, 2020
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | September 8, 2020 04:00 | September 9, 2020 02:45 | 22h 45m | 4,802 | 10K |
| 2 | August 27, 2020 09:45 | August 27, 2020 16:45 | 7h | 1,484 | 1,727 |
| 3 | July 10, 2020 22:00 | July 14, 2020 03:30 | 3d 5h | 1,015 | 27K |
| 4 | September 15, 2020 03:15 | September 22, 2020 19:30 | 7d 16h | 997 | 2,689 |
| 5 | September 24, 2020 12:45 | September 25, 2020 21:30 | 1d 8h | 994 | 1,162 |
| 6 | July 2, 2020 01:15 | July 9, 2020 19:15 | 7d 18h | 565 | 2,878 |
| 7 | February 13, 2020 04:30 | February 25, 2020 16:00 | 12d 11h | 551 | 838 |
| 8 | June 16, 2020 18:15 | June 16, 2020 23:00 | 4h 45m | 515 | 726 |
| 9 | November 14, 2020 02:30 | November 15, 2020 05:30 | 1d 3h | 498 | 4,593 |
| 10 | July 31, 2020 23:30 | August 3, 2020 16:00 | 2d 16h | 341 | 1,171 |
Outage episodes by size in 2020: 20 reached 100+ customers, 3 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 2020, 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. | 2020 | 63 min | 0.56 | 30 min | 0.36 |
| Black Hills Electric Coop, Inc | 2020 | 3.7 hrs | 1.16 | 3.7 hrs | 1.16 |
| 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 2020; 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, 2020, 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/2020/south-dakota/lawrence-county