County annual report · FIPS 55025
2015 Dane County, WI Power Outage Report
In 2015, customers in Dane County, WI went without power for an average of 0.3 hours, a total of 101K customer-hours (Wisconsin average 1.5 hours). That ranks 67th worst of 71 Wisconsin counties and 2157th 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 Dane 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 | August 20, 2015 13:45 | August 20, 2015 19:45 | 6h | 2,874 | 3,795 |
| 2 | July 13, 2015 07:00 | July 13, 2015 23:45 | 16h 45m | 2,735 | 7,059 |
| 3 | September 24, 2015 06:15 | September 24, 2015 19:15 | 13h | 2,047 | 564 |
| 4 | September 17, 2015 22:00 | September 18, 2015 18:00 | 20h | 2,039 | 7,128 |
| 5 | July 5, 2015 21:00 | July 6, 2015 00:30 | 3h 30m | 1,856 | 4,640 |
| 6 | September 22, 2015 09:30 | September 22, 2015 11:15 | 1h 45m | 1,856 | 3,248 |
| 7 | October 29, 2015 05:00 | October 29, 2015 08:15 | 3h 15m | 1,493 | 2,985 |
| 8 | April 5, 2015 15:30 | April 6, 2015 13:15 | 21h 45m | 1,432 | 1,214 |
| 9 | April 27, 2015 11:00 | April 27, 2015 11:15 | 15m | 1,352 | 338 |
| 10 | July 18, 2015 18:45 | July 19, 2015 01:30 | 6h 45m | 1,352 | 3,081 |
Outage episodes by size in 2015: 93 reached 100+ customers, 16 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 Dane 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 |
| Adams-Columbia Electric Coop | 2015 | 2.0 hrs | 0.77 | 67 min | 0.59 |
| Madison Gas & Electric Co | 2015 | 31 min | 0.33 | 26 min | 0.31 |
| Sun Prairie Utilities | 2015 | 10 min | 0.28 | - | - |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Wisconsin Power & Light Co | - | - | - | - | - |
| Rock Energy Cooperative | - | - | - | - | - |
| City of Stoughton - (WI) | - | - | - | - | - |
| Village of Black Earth - (WI) | - | - | - | - | - |
| Village of Mazomanie - (WI) | - | - | - | - | - |
| Village of Mt. Horeb - (WI) | - | - | - | - | - |
| Village of Waunakee - (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 ÷ 295,516 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. Dane County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Dane 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/dane-county