County annual report · FIPS 47163
2018 Sullivan County, TN Power Outage Report
In 2018, customers in Sullivan County, TN went without power for an average of 9.9 hours, a total of 686K customer-hours (Tennessee average 2.1 hours). That ranks 2nd worst of 71 Tennessee counties and 557th of 2,798 nationally.
Compared with TN, the US and 2017
Coverage line is EAGLE-I's share of Tennessee customers tracked each year.
Biggest outages in Sullivan County, 2018
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 21, 2018 01:30 | July 24, 2018 19:15 | 3d 17h | 12,117 | 197K |
| 2 | December 5, 2018 09:15 | December 13, 2018 02:15 | 7d 17h | 7,445 | 267K |
| 3 | April 1, 2018 21:15 | April 1, 2018 23:15 | 2h | 3,225 | 5,062 |
| 4 | August 31, 2018 00:15 | September 1, 2018 07:00 | 1d 6h | 2,462 | 959 |
| 5 | May 30, 2018 12:00 | June 1, 2018 23:15 | 2d 11h | 2,096 | 8,461 |
| 6 | November 6, 2018 11:45 | November 6, 2018 22:15 | 10h 30m | 1,801 | 5,244 |
| 7 | June 2, 2018 00:00 | June 3, 2018 14:45 | 1d 14h | 1,635 | 7,696 |
| 8 | August 6, 2018 17:30 | August 7, 2018 02:45 | 9h 15m | 1,615 | 1,187 |
| 9 | May 5, 2018 21:30 | May 7, 2018 01:45 | 1d 4h | 1,538 | 7,103 |
| 10 | February 21, 2018 13:00 | February 22, 2018 00:15 | 11h 15m | 1,331 | 1,086 |
Outage episodes by size in 2018: 126 reached 100+ customers, 21 reached 1,000+ customers, 1 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 Sullivan County reported on EIA Form 861 for 2018, 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 |
|---|---|---|---|---|---|
| Appalachian Power Co | 2018 | 19.3 hrs | 2.76 | 9.3 hrs | 2.25 |
| Johnson City - (TN) | 2018 | 25 min | 0.26 | 24 min | 0.26 |
| Kingsport Power Co | 2018 | 14.9 hrs | 2.51 | 5.1 hrs | 1.94 |
| City of Bristol - (TN) | 2018 | 60 min | 1.43 | 52 min | 1.38 |
| City of Elizabethton - (TN) | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 55% of Tennessee's customers in 2018; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 69,352 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. Sullivan County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Sullivan County, TN annual power outage report, 2018, 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/2018/tennessee/sullivan-county