County annual report · FIPS 47117
2021 Marshall County, TN Power Outage Report
In 2021, customers in Marshall County, TN went without power for an average of 1.7 hours, a total of 31K customer-hours (Tennessee average 3.7 hours). That ranks 51st worst of 84 Tennessee counties and 2358th 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 Marshall 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 | August 16, 2021 17:00 | August 16, 2021 19:00 | 2h | 1,699 | 1,279 |
| 2 | November 17, 2021 17:15 | November 17, 2021 23:15 | 6h | 1,202 | 329 |
| 3 | February 4, 2021 13:00 | February 4, 2021 13:15 | 15m | 1,183 | 296 |
| 4 | June 12, 2021 20:30 | June 13, 2021 06:00 | 9h 30m | 934 | 1,828 |
| 5 | July 28, 2021 12:15 | July 28, 2021 21:00 | 8h 45m | 861 | 639 |
| 6 | March 3, 2021 16:15 | March 3, 2021 17:00 | 45m | 844 | 607 |
| 7 | May 4, 2021 12:30 | May 4, 2021 15:30 | 3h | 822 | 646 |
| 8 | March 28, 2021 04:30 | March 28, 2021 14:30 | 10h | 723 | 1,909 |
| 9 | December 11, 2021 06:15 | December 11, 2021 16:00 | 9h 45m | 644 | 894 |
| 10 | September 16, 2021 21:00 | September 16, 2021 21:15 | 15m | 623 | 156 |
Outage episodes by size in 2021: 30 reached 100+ customers, 3 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 Marshall 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 |
| Middle Tennessee E M C | 2021 | 65 min | 1.00 | 55 min | 0.96 |
| City of Fayetteville | 2021 | 2.8 hrs | 1.88 | 2.4 hrs | 1.81 |
| City of Lewisburg - (TN) | 2021 | 47 min | 0.52 | 9 min | 0.16 |
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 ÷ 18,320 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. Marshall County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Marshall 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/marshall-county