County annual report · FIPS 47011
2020 Bradley County, TN Power Outage Report
In 2020, customers in Bradley County, TN went without power for an average of 7.2 hours, a total of 390K customer-hours (Tennessee average 6.5 hours). That ranks 19th worst of 84 Tennessee counties and 1068th of 3,019 nationally.
Compared with TN, the US and 2019
Coverage line is EAGLE-I's share of Tennessee customers tracked each year.
Biggest outages in Bradley County, 2020
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | April 13, 2020 01:15 | April 16, 2020 13:15 | 3d 12h | 13,967 | 156K |
| 2 | May 3, 2020 10:00 | May 3, 2020 12:30 | 2h 30m | 11,337 | 14K |
| 3 | May 3, 2020 23:45 | May 4, 2020 20:00 | 20h 15m | 9,195 | 2,332 |
| 4 | October 29, 2020 06:30 | October 29, 2020 20:45 | 14h 15m | 6,163 | 7,395 |
| 5 | July 10, 2020 02:45 | July 10, 2020 04:45 | 2h | 5,260 | 3,946 |
| 6 | June 16, 2020 12:15 | June 16, 2020 15:15 | 3h | 4,615 | 8,146 |
| 7 | August 12, 2020 10:45 | August 14, 2020 13:15 | 2d 2h | 4,326 | 10K |
| 8 | September 21, 2020 12:45 | September 21, 2020 20:15 | 7h 30m | 4,326 | 1,721 |
| 9 | October 26, 2020 17:30 | October 26, 2020 18:15 | 45m | 3,572 | 1,926 |
| 10 | January 10, 2020 14:15 | January 12, 2020 13:30 | 1d 23h | 3,158 | 13K |
Outage episodes by size in 2020: 105 reached 100+ customers, 49 reached 1,000+ customers, 2 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 Bradley County reported on EIA Form 861 for 2020, 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 |
|---|---|---|---|---|---|
| Volunteer Electric Coop | 2020 | 4.5 hrs | 2.74 | 52 min | 2.25 |
| City of Chattanooga - (TN) | 2020 | 19.9 hrs | 1.47 | 86 min | 0.71 |
| City of Cleveland - (TN) | 2020 | 2.2 hrs | 2.05 | 68 min | 0.98 |
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 2020; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 54,499 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. Bradley County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Bradley County, TN annual power outage report, 2020, 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/2020/tennessee/bradley-county