County annual report · FIPS 47173
2017 Union County, TN Power Outage Report
In 2017, customers in Union County, TN went without power for an average of 8.5 hours, a total of 81K customer-hours (Tennessee average 5.6 hours). That ranks 7th worst of 68 Tennessee counties and 631st of 2,786 nationally.
Compared with TN, the US and 2016
Coverage line is EAGLE-I's share of Tennessee customers tracked each year.
Biggest outages in Union County, 2017
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | July 26, 2017 01:45 | July 26, 2017 05:30 | 3h 45m | 2,618 | 1,487 |
| 2 | May 28, 2017 03:00 | May 30, 2017 17:45 | 2d 14h | 2,349 | 33K |
| 3 | January 26, 2017 09:45 | January 26, 2017 15:15 | 5h 30m | 2,218 | 7,408 |
| 4 | May 5, 2017 05:30 | May 5, 2017 09:45 | 4h 15m | 1,047 | 3,979 |
| 5 | April 22, 2017 02:45 | April 22, 2017 07:15 | 4h 30m | 933 | 974 |
| 6 | April 21, 2017 17:30 | April 21, 2017 21:30 | 4h | 908 | 516 |
| 7 | June 15, 2017 20:15 | June 16, 2017 03:45 | 7h 30m | 873 | 2,278 |
| 8 | June 5, 2017 19:15 | June 6, 2017 19:45 | 1d | 731 | 1,199 |
| 9 | June 14, 2017 01:30 | June 14, 2017 11:45 | 10h 15m | 707 | 1,330 |
| 10 | June 19, 2017 11:30 | June 19, 2017 14:45 | 3h 15m | 707 | 1,368 |
Outage episodes by size in 2017: 30 reached 100+ customers, 4 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 Union County reported on EIA Form 861 for 2017, 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 | 2017 | 2.2 hrs | 2.36 | 1.7 hrs | 2.23 |
| Knoxville Utilities Board | 2017 | 4.1 hrs | 1.60 | 2.6 hrs | 1.44 |
| City of Clinton - (TN) | 2017 | 2.5 hrs | 1.38 | 1.9 hrs | 1.27 |
| City of LaFollette | 2017 | 4.9 hrs | 4.16 | 3.8 hrs | 3.72 |
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 2017; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 9,474 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. Union County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Union County, TN annual power outage report, 2017, 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/2017/tennessee/union-county