County annual report · FIPS 55097
2015 Portage County, WI Power Outage Report
In 2015, customers in Portage County, WI went without power for an average of 1.9 hours, a total of 53K customer-hours (Wisconsin average 1.5 hours). That ranks 27th worst of 71 Wisconsin counties and 1254th 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 Portage 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 | March 11, 2015 15:15 | March 11, 2015 16:15 | 1h | 3,376 | 3,376 |
| 2 | December 24, 2015 06:15 | December 24, 2015 22:30 | 16h 15m | 3,229 | 1,472 |
| 3 | January 21, 2015 15:00 | January 21, 2015 15:15 | 15m | 3,179 | 795 |
| 4 | March 12, 2015 18:00 | March 12, 2015 18:45 | 45m | 2,852 | 2,139 |
| 5 | March 16, 2015 15:00 | March 16, 2015 22:00 | 7h | 2,852 | 18K |
| 6 | April 8, 2015 18:30 | April 8, 2015 19:15 | 45m | 1,306 | 653 |
| 7 | July 13, 2015 07:45 | July 14, 2015 02:30 | 18h 45m | 970 | 6,574 |
| 8 | September 7, 2015 00:00 | September 7, 2015 03:45 | 3h 45m | 948 | 1,028 |
| 9 | April 10, 2015 00:45 | April 10, 2015 03:15 | 2h 30m | 743 | 520 |
| 10 | July 24, 2015 16:30 | July 24, 2015 18:45 | 2h 15m | 627 | 316 |
Outage episodes by size in 2015: 43 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 Portage 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 Public Service Corp | 2015 | 2.7 hrs | 1.09 | 2.0 hrs | 0.91 |
| Adams-Columbia Electric Coop | 2015 | 2.0 hrs | 0.77 | 67 min | 0.59 |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Wisconsin Power & Light Co | - | - | - | - | - |
| Central Wisconsin Elec Coop | - | - | - | - | - |
| Consolidated Water Power Co | - | - | - | - | - |
| Wisconsin Rapids W W & L Comm | - | - | - | - | - |
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 ÷ 27,174 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. Portage County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Portage 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/portage-county