County annual report · FIPS 55121
2015 Trempealeau County, WI Power Outage Report
In 2015, customers in Trempealeau County, WI went without power for an average of 0.7 hours, a total of 9,815 customer-hours (Wisconsin average 1.5 hours). That ranks 57th worst of 71 Wisconsin counties and 1978th 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 Trempealeau 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 | July 18, 2015 07:45 | July 18, 2015 19:30 | 11h 45m | 796 | 4,842 |
| 2 | July 18, 2015 22:15 | July 19, 2015 01:45 | 3h 30m | 639 | 2,070 |
| 3 | September 6, 2015 23:00 | September 7, 2015 08:00 | 9h | 529 | 1,516 |
| 4 | July 19, 2015 03:00 | July 19, 2015 03:15 | 15m | 143 | 36 |
| 5 | June 9, 2015 21:45 | June 10, 2015 05:30 | 7h 45m | 73 | 203 |
| 6 | September 6, 2015 01:45 | September 6, 2015 05:00 | 3h 15m | 66 | 166 |
| 7 | November 26, 2015 17:15 | November 26, 2015 18:45 | 1h 30m | 45 | 46 |
| 8 | September 25, 2015 14:30 | September 25, 2015 18:00 | 3h 30m | 37 | 121 |
| 9 | June 14, 2015 09:45 | June 14, 2015 13:15 | 3h 30m | 28 | 84 |
| 10 | June 20, 2015 18:45 | June 20, 2015 20:45 | 2h | 25 | 44 |
Outage episodes by size in 2015: 4 reached 100+ customers, 0 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 Trempealeau 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 |
|---|---|---|---|---|---|
| Northern States Power Co | 2015 | 2.4 hrs | 0.90 | 2.0 hrs | 0.82 |
| Riverland Energy Cooperative | 2015 | 1.9 hrs | 0.92 | 1.7 hrs | 0.84 |
| Eau Claire Electric Coop | - | - | - | - | - |
| Jackson Electric Coop, Inc - (WI) | - | - | - | - | - |
| City of Arcadia - (WI) | - | - | - | - | - |
| Village of Trempealeau - (WI) | - | - | - | - | - |
| Whitehall Electric Utility | - | - | - | - | - |
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 ÷ 14,810 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. Trempealeau County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Trempealeau 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/trempealeau-county