County annual report · FIPS 55111
2015 Sauk County, WI Power Outage Report
In 2015, customers in Sauk County, WI went without power for an average of 0.7 hours, a total of 40K customer-hours (Wisconsin average 1.5 hours). That ranks 58th worst of 71 Wisconsin counties and 1983rd of 2,484 nationally.
Compared with WI, the US
Coverage line is EAGLE-I's share of Wisconsin customers tracked each year.
Biggest outages in Sauk County, 2015
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 29, 2015 23:45 | June 30, 2015 03:45 | 4h | 1,316 | 1,763 |
| 2 | December 16, 2015 14:45 | December 16, 2015 20:15 | 5h 30m | 1,053 | 976 |
| 3 | September 21, 2015 13:00 | September 21, 2015 17:15 | 4h 15m | 1,050 | 692 |
| 4 | December 21, 2015 10:45 | December 21, 2015 13:00 | 2h 15m | 997 | 1,766 |
| 5 | November 12, 2015 14:00 | November 12, 2015 15:15 | 1h 15m | 818 | 446 |
| 6 | March 10, 2015 14:15 | March 10, 2015 21:00 | 6h 45m | 807 | 4,530 |
| 7 | June 26, 2015 02:15 | June 26, 2015 06:30 | 4h 15m | 628 | 1,549 |
| 8 | July 13, 2015 07:45 | July 14, 2015 22:00 | 1d 14h | 610 | 5,542 |
| 9 | December 28, 2015 22:45 | December 29, 2015 04:30 | 5h 45m | 549 | 1,755 |
| 10 | June 11, 2015 21:15 | June 12, 2015 01:15 | 4h | 504 | 440 |
Outage episodes by size in 2015: 34 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 Sauk County reported on EIA Form 861 for 2015, 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 | 2015 | 2.0 hrs | 0.77 | 67 min | 0.59 |
| Oakdale Electric Coop | 2015 | 3.4 hrs | 1.60 | 2.6 hrs | 1.49 |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Wisconsin Power & Light Co | - | - | - | - | - |
| Vernon Electric Coop | - | - | - | - | - |
| 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 n/a of Wisconsin's customers in 2015; 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, 2015, 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/2015/wisconsin/sauk-county