County annual report · FIPS 55105
2015 Rock County, WI Power Outage Report
In 2015, customers in Rock County, WI went without power for an average of 1.8 hours, a total of 100K customer-hours (Wisconsin average 1.5 hours). That ranks 30th worst of 71 Wisconsin counties and 1335th 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 Rock 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 | April 15, 2015 14:30 | April 16, 2015 00:30 | 10h | 9,902 | 15K |
| 2 | September 17, 2015 19:30 | September 18, 2015 11:15 | 15h 45m | 4,802 | 24K |
| 3 | March 3, 2015 17:45 | March 3, 2015 18:30 | 45m | 2,929 | 1,465 |
| 4 | November 21, 2015 03:00 | November 21, 2015 06:15 | 3h 15m | 2,819 | 3,563 |
| 5 | July 29, 2015 10:00 | July 29, 2015 23:45 | 13h 45m | 2,258 | 1,879 |
| 6 | June 28, 2015 23:15 | June 29, 2015 01:45 | 2h 30m | 1,493 | 692 |
| 7 | October 5, 2015 14:15 | October 5, 2015 20:00 | 5h 45m | 1,463 | 378 |
| 8 | May 20, 2015 12:45 | May 20, 2015 20:00 | 7h 15m | 1,414 | 1,449 |
| 9 | November 10, 2015 15:30 | November 10, 2015 20:45 | 5h 15m | 1,397 | 385 |
| 10 | July 13, 2015 08:00 | July 13, 2015 22:30 | 14h 30m | 1,380 | 2,348 |
Outage episodes by size in 2015: 52 reached 100+ customers, 14 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 Rock 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 |
|---|---|---|---|---|---|
| Wisconsin Electric Power Co | 2015 | 2.1 hrs | 1.63 | 1.8 hrs | 1.38 |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Wisconsin Power & Light Co | - | - | - | - | - |
| Rock Energy Cooperative | - | - | - | - | - |
| Brodhead Water & Lighting Comm | - | - | - | - | - |
| City of Evansville | - | - | - | - | - |
| City of Stoughton - (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 ÷ 56,401 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. Rock County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Rock 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/rock-county