County annual report · FIPS 46129
2017 Walworth County, SD Power Outage Report
In 2017, customers in Walworth County, SD went without power for an average of 3.3 hours, a total of 7,846 customer-hours (South Dakota average 0.8 hours). That ranks 2nd worst of 26 South Dakota counties and 1247th of 2,786 nationally.
Compared with SD, the US
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Walworth County, 2017
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | June 4, 2017 13:15 | June 4, 2017 15:45 | 2h 30m | 2,073 | 2,735 |
| 2 | October 18, 2017 10:15 | October 18, 2017 10:45 | 30m | 1,777 | 445 |
| 3 | November 14, 2017 11:00 | November 14, 2017 11:30 | 30m | 1,717 | 857 |
| 4 | October 26, 2017 19:45 | October 26, 2017 20:00 | 15m | 909 | 227 |
| 5 | March 5, 2017 23:30 | March 10, 2017 16:45 | 4d 17h | 699 | 751 |
| 6 | November 28, 2017 11:00 | November 28, 2017 11:15 | 15m | 649 | 162 |
| 7 | August 22, 2017 20:30 | August 22, 2017 21:45 | 1h 15m | 440 | 549 |
| 8 | November 14, 2017 13:15 | November 14, 2017 13:30 | 15m | 220 | 55 |
| 9 | June 23, 2017 13:00 | June 23, 2017 13:15 | 15m | 164 | 41 |
| 10 | August 26, 2017 19:00 | August 26, 2017 19:15 | 15m | 89 | 22 |
Outage episodes by size in 2017: 9 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 Walworth County reported on EIA Form 861 for 2017, 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 | - | - | - | - | - |
| Montana-Dakota Utilities Co | - | - | - | - | - |
| Cam Wal 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 ÷ 2,370 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. Walworth County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Walworth 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/walworth-county