County annual report · FIPS 47165
2015 Sumner County, TN Power Outage Report
In 2015, customers in Sumner County, TN went without power for an average of 2.6 hours, a total of 223K customer-hours (Tennessee average 2.4 hours). That ranks 12th worst of 50 Tennessee counties and 1019th of 2,484 nationally.
Compared with TN, the US
Coverage line is EAGLE-I's share of Tennessee customers tracked each year.
Biggest outages in Sumner 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 | May 27, 2015 17:45 | May 28, 2015 22:00 | 1d 4h | 7,572 | 20K |
| 2 | July 13, 2015 11:30 | July 13, 2015 12:45 | 1h 15m | 6,624 | 4,970 |
| 3 | June 18, 2015 11:00 | June 18, 2015 14:45 | 3h 45m | 6,589 | 4,956 |
| 4 | February 18, 2015 13:15 | February 20, 2015 00:30 | 1d 11h | 5,478 | 9,090 |
| 5 | February 16, 2015 11:45 | February 18, 2015 06:45 | 1d 19h | 5,202 | 39K |
| 6 | May 30, 2015 17:45 | May 31, 2015 02:00 | 8h 15m | 4,614 | 1,558 |
| 7 | November 22, 2015 20:15 | November 22, 2015 21:15 | 1h | 4,259 | 3,195 |
| 8 | July 22, 2015 04:00 | July 22, 2015 22:15 | 18h 15m | 3,013 | 6,590 |
| 9 | March 10, 2015 13:00 | March 10, 2015 20:45 | 7h 45m | 2,894 | 3,041 |
| 10 | December 14, 2015 04:15 | December 15, 2015 03:30 | 23h 15m | 2,764 | 14K |
Outage episodes by size in 2015: 87 reached 100+ customers, 34 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 Sumner 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 |
|---|---|---|---|---|---|
| Tri-County Elec Member Corp (TN) | 2015 | 4.4 hrs | 3.25 | 4.0 hrs | 2.90 |
| Nashville Electric Service | 2015 | 2.8 hrs | 1.84 | 1.9 hrs | 1.58 |
| Cumberland Elec Member Corp | - | - | - | - | - |
| City of Gallatin - (TN) | - | - | - | - | - |
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 Tennessee's customers in 2015; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 85,061 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. Sumner County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Sumner County, TN 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/tennessee/sumner-county