County annual report · FIPS 47057
2019 Grainger County, TN Power Outage Report
In 2019, customers in Grainger County, TN went without power for an average of 3.5 hours, a total of 43K customer-hours (Tennessee average 2.7 hours). That ranks 22nd worst of 86 Tennessee counties and 1485th of 2,945 nationally.
Compared with TN, the US and 2018
Coverage line is EAGLE-I's share of Tennessee customers tracked each year.
Biggest outages in Grainger County, 2019
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | June 22, 2019 00:45 | June 23, 2019 21:15 | 1d 20h | 1,257 | 11K |
| 2 | October 27, 2019 05:45 | October 28, 2019 00:45 | 19h | 765 | 2,146 |
| 3 | February 8, 2019 06:00 | February 8, 2019 15:15 | 9h 15m | 713 | 1,362 |
| 4 | May 12, 2019 04:00 | May 12, 2019 14:15 | 10h 15m | 597 | 1,448 |
| 5 | November 9, 2019 00:30 | November 9, 2019 05:45 | 5h 15m | 590 | 874 |
| 6 | May 13, 2019 00:45 | May 13, 2019 11:45 | 11h | 586 | 2,059 |
| 7 | October 26, 2019 07:00 | October 26, 2019 15:30 | 8h 30m | 513 | 1,424 |
| 8 | November 5, 2019 22:00 | November 6, 2019 00:15 | 2h 15m | 372 | 419 |
| 9 | January 1, 2019 01:00 | January 1, 2019 18:15 | 17h 15m | 330 | 1,919 |
| 10 | October 31, 2019 16:00 | October 31, 2019 21:00 | 5h | 310 | 659 |
Outage episodes by size in 2019: 24 reached 100+ customers, 1 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 2019, 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 | 2018 | 2.8 hrs | 1.77 | 88 min | 1.44 |
| Knoxville Utilities Board | 2018 | 3.5 hrs | 1.84 | 2.1 hrs | 1.49 |
| Appalachian Electric Coop | 2018 | 4.9 hrs | 3.34 | 4.9 hrs | 3.34 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 73% of Tennessee's customers in 2019; 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, 2019, 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/2019/tennessee/grainger-county