County annual report · FIPS 47031
2021 Coffee County, TN Power Outage Report
In 2021, customers in Coffee County, TN went without power for an average of 6.0 hours, a total of 197K customer-hours (Tennessee average 3.7 hours). That ranks 20th worst of 84 Tennessee counties and 1155th of 2,974 nationally.
Compared with TN, the US and 2020
Coverage line is EAGLE-I's share of Tennessee customers tracked each year.
Biggest outages in Coffee County, 2021
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | February 15, 2021 14:00 | February 21, 2021 02:45 | 5d 12h | 4,982 | 157K |
| 2 | August 1, 2021 05:00 | August 1, 2021 10:30 | 5h 30m | 1,904 | 3,064 |
| 3 | May 29, 2021 01:45 | May 29, 2021 02:30 | 45m | 1,654 | 1,241 |
| 4 | May 4, 2021 13:00 | May 4, 2021 22:00 | 9h | 1,587 | 1,981 |
| 5 | November 8, 2021 23:45 | November 9, 2021 03:00 | 3h 15m | 1,539 | 3,794 |
| 6 | July 2, 2021 16:00 | July 2, 2021 17:15 | 1h 15m | 1,532 | 487 |
| 7 | June 8, 2021 04:15 | June 8, 2021 14:15 | 10h | 1,514 | 775 |
| 8 | July 2, 2021 09:45 | July 2, 2021 15:00 | 5h 15m | 1,510 | 2,140 |
| 9 | May 3, 2021 16:00 | May 3, 2021 20:00 | 4h | 1,414 | 2,769 |
| 10 | March 1, 2021 04:30 | March 1, 2021 16:00 | 11h 30m | 778 | 1,214 |
Outage episodes by size in 2021: 37 reached 100+ customers, 9 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 Coffee County reported on EIA Form 861 for 2021, 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 |
|---|---|---|---|---|---|
| Duck River Elec Member Corp | 2021 | 7.7 hrs | 2.06 | 2.2 hrs | 1.59 |
| Sequachee Valley Electric Coop | 2021 | 5.8 hrs | 3.71 | 4.5 hrs | 3.34 |
| Tullahoma Board-Public Utils | 2021 | 6.0 hrs | 3.56 | 27 min | 2.19 |
| Caney Fork Electric Coop, Inc | - | - | - | - | - |
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 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 33,033 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. Coffee County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Coffee County, TN annual power outage report, 2021, 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/2021/tennessee/coffee-county