County annual report · FIPS 47057
2023 Grainger County, TN Power Outage Report
In 2023, customers in Grainger County, TN went without power for an average of 7.1 hours, a total of 89K customer-hours (Tennessee average 11.1 hours). That ranks 30th worst of 83 Tennessee counties and 1134th of 2,977 nationally.
Compared with TN, the US and 2022
Coverage line is EAGLE-I's share of Tennessee customers tracked each year.
Biggest outages in Grainger County, 2023
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | April 1, 2023 09:30 | April 3, 2023 17:45 | 2d 8h | 2,514 | 20K |
| 2 | May 16, 2023 22:15 | May 17, 2023 10:15 | 12h | 2,414 | 3,821 |
| 3 | May 19, 2023 08:15 | May 19, 2023 09:00 | 45m | 1,441 | 819 |
| 4 | January 4, 2023 18:45 | January 4, 2023 22:30 | 3h 45m | 1,375 | 438 |
| 5 | March 3, 2023 20:30 | March 5, 2023 17:45 | 1d 21h | 1,369 | 3,981 |
| 6 | May 22, 2023 23:45 | May 23, 2023 01:15 | 1h 30m | 1,348 | 1,685 |
| 7 | April 5, 2023 04:15 | April 5, 2023 07:15 | 3h | 1,338 | 2,224 |
| 8 | May 16, 2023 20:15 | May 16, 2023 21:15 | 1h | 1,225 | 919 |
| 9 | August 7, 2023 15:45 | August 11, 2023 00:30 | 3d 8h | 1,191 | 5,003 |
| 10 | January 12, 2023 08:30 | January 12, 2023 09:45 | 1h 15m | 1,177 | 890 |
Outage episodes by size in 2023: 58 reached 100+ customers, 11 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 Grainger County reported on EIA Form 861 for 2023, 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 |
|---|---|---|---|---|---|
| Powell Valley Electric Coop | 2023 | 4.3 hrs | 4.66 | 3.5 hrs | 4.60 |
| Knoxville Utilities Board | 2023 | 6.0 hrs | 2.42 | 2.1 hrs | 1.50 |
| Appalachian Electric Coop | 2023 | 10.4 hrs | 3.67 | 3.2 hrs | 2.86 |
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 2023; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 12,567 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. Grainger County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Grainger County, TN annual power outage report, 2023, 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/2023/tennessee/grainger-county