County annual report · FIPS 55111
2018 Sauk County, WI Power Outage Report
In 2018, customers in Sauk County, WI went without power for an average of 1.1 hours, a total of 67K customer-hours (Wisconsin average 1.7 hours). That ranks 51st worst of 71 Wisconsin counties and 2273rd of 2,798 nationally.
Compared with WI, the US and 2017
Coverage line is EAGLE-I's share of Wisconsin customers tracked each year.
Biggest outages in Sauk County, 2018
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | May 4, 2018 08:30 | May 4, 2018 17:00 | 8h 30m | 1,350 | 3,174 |
| 2 | May 31, 2018 12:00 | May 31, 2018 20:45 | 8h 45m | 1,131 | 1,203 |
| 3 | February 15, 2018 11:30 | February 15, 2018 12:30 | 1h | 1,100 | 822 |
| 4 | August 28, 2018 18:15 | August 30, 2018 16:15 | 1d 22h | 1,084 | 4,616 |
| 5 | May 29, 2018 21:00 | May 30, 2018 00:30 | 3h 30m | 1,070 | 275 |
| 6 | July 29, 2018 12:15 | July 29, 2018 16:15 | 4h | 1,022 | 2,726 |
| 7 | October 30, 2018 05:00 | October 30, 2018 06:30 | 1h 30m | 990 | 1,273 |
| 8 | October 24, 2018 18:45 | October 25, 2018 16:45 | 22h | 900 | 15K |
| 9 | August 30, 2018 17:30 | September 4, 2018 16:15 | 4d 22h | 886 | 5,865 |
| 10 | December 28, 2018 04:30 | December 28, 2018 06:15 | 1h 45m | 876 | 1,402 |
Outage episodes by size in 2018: 40 reached 100+ customers, 6 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 Sauk County reported on EIA Form 861 for 2018, 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 |
|---|---|---|---|---|---|
| Adams-Columbia Electric Coop | 2018 | 6.5 hrs | 0.91 | 50 min | 0.46 |
| Vernon Electric Coop | 2018 | 3.8 hrs | - | 2.4 hrs | - |
| Oakdale Electric Coop | 2018 | 5.6 hrs | 1.36 | 2.2 hrs | 1.01 |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Wisconsin Power & Light Co | - | - | - | - | - |
| Richland Electric Coop | - | - | - | - | - |
| Wisconsin Dells Electric Util | - | - | - | - | - |
| Reedsburg Utility Comm | - | - | - | - | - |
| Village of Prairie Du Sac - (WI) | - | - | - | - | - |
| Village of Sauk City - (WI) | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 83% of Wisconsin's customers in 2018; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 60,955 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. Sauk County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Sauk County, WI annual power outage report, 2018, 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/2018/wisconsin/sauk-county