County annual report · FIPS 47061
2025 Grundy County, TN Power Outage Report
In 2025, customers in Grundy County, TN went without power for an average of 49.3 hours, a total of 353K customer-hours (Tennessee average 4.3 hours). That ranks 1st worst of 81 Tennessee counties and 86th of 3,000 nationally.
Compared with TN, the US and 2024
Coverage line is EAGLE-I's share of Tennessee customers tracked each year.
Biggest outages in Grundy County, 2025
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | November 5, 2025 17:30 | November 13, 2025 15:45 | 7d 22h | 3,989 | 173K |
| 2 | April 28, 2025 13:15 | April 28, 2025 20:30 | 7h 15m | 3,703 | 8,137 |
| 3 | April 4, 2025 13:15 | April 9, 2025 12:15 | 4d 23h | 3,641 | 31K |
| 4 | June 7, 2025 20:30 | June 8, 2025 21:45 | 1d 1h | 3,624 | 22K |
| 5 | November 29, 2025 15:30 | November 30, 2025 01:45 | 10h 15m | 2,949 | 910 |
| 6 | June 17, 2025 11:00 | August 12, 2025 05:15 | 55d 18h | 2,880 | 16K |
| 7 | August 20, 2025 18:00 | August 21, 2025 06:45 | 12h 45m | 2,333 | 25K |
| 8 | December 10, 2025 08:30 | December 10, 2025 11:00 | 2h 30m | 1,736 | 1,738 |
| 9 | May 17, 2025 14:00 | May 18, 2025 00:00 | 10h | 1,725 | 4,678 |
| 10 | December 18, 2025 11:00 | December 21, 2025 17:45 | 3d 6h | 1,609 | 14K |
Outage episodes by size in 2025: 31 reached 100+ customers, 15 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 Grundy County reported on EIA Form 861 for 2025, 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 |
|---|---|---|---|---|---|
| Duck River Elec Member Corp | 2024 | 4.6 hrs | 2.46 | 2.7 hrs | 2.08 |
| Sequachee Valley Electric Coop | 2024 | 5.0 hrs | 3.09 | 4.2 hrs | 2.69 |
| Caney Fork Electric Coop, Inc | - | - | - | - | - |
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 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 7,160 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. Grundy County has data for 2015, 2018–2025.
Cite this report
MassOutage (massoutage.com), Grundy County, TN annual power outage report, 2025, 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/2025/tennessee/grundy-county