County annual report · FIPS 47057
2015 Grainger County, TN Power Outage Report
In 2015, customers in Grainger County, TN went without power for an average of 0.4 hours, a total of 5,514 customer-hours (Tennessee average 2.4 hours). That ranks 29th worst of 50 Tennessee counties and 2104th 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 Grainger 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 | September 30, 2015 21:15 | October 1, 2015 07:00 | 9h 45m | 308 | 997 |
| 2 | October 11, 2015 20:30 | October 11, 2015 21:45 | 1h 15m | 145 | 181 |
| 3 | December 25, 2015 22:45 | December 26, 2015 08:45 | 10h | 96 | 283 |
| 4 | June 23, 2015 11:30 | June 23, 2015 12:45 | 1h 15m | 86 | 44 |
| 5 | July 15, 2015 03:00 | July 15, 2015 06:45 | 3h 45m | 83 | 311 |
| 6 | July 15, 2015 08:00 | July 15, 2015 14:00 | 6h | 83 | 304 |
| 7 | July 28, 2015 02:00 | July 28, 2015 09:00 | 7h | 64 | 285 |
| 8 | December 29, 2015 00:00 | December 29, 2015 08:15 | 8h 15m | 64 | 68 |
| 9 | July 14, 2015 20:15 | July 14, 2015 22:30 | 2h 15m | 63 | 142 |
| 10 | October 3, 2015 04:15 | October 3, 2015 09:45 | 5h 30m | 63 | 347 |
Outage episodes by size in 2015: 2 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 Grainger 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 |
|---|---|---|---|---|---|
| Powell Valley Electric Coop | 2015 | 1.8 hrs | 1.52 | 1.6 hrs | 1.43 |
| Knoxville Utilities Board | 2015 | 3.5 hrs | 1.60 | 2.0 hrs | 1.44 |
| Appalachian Electric Coop | 2015 | 6.5 hrs | 3.48 | 2.0 hrs | 1.64 |
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 ÷ 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, 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/grainger-county