County annual report · FIPS 47065
2018 Hamilton County, TN Power Outage Report
In 2018, customers in Hamilton County, TN went without power for an average of 0.0 hours, a total of 1 customer-hours (Tennessee average 2.1 hours). That ranks 71st worst of 71 Tennessee counties and 2798th 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 Hamilton County, 2018
The 2 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | January 29, 2018 18:45 | January 29, 2018 19:00 | 15m | 1 | 0 |
| 2 | August 17, 2018 19:30 | August 17, 2018 20:00 | 30m | 1 | 1 |
Outage episodes by size in 2018: 0 reached 100+ customers, 0 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 Hamilton 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 |
|---|---|---|---|---|---|
| City of Chattanooga - (TN) | 2018 | 2.4 hrs | 1.00 | 77 min | 0.66 |
| Sequachee Valley Electric Coop | 2018 | 7.0 hrs | 3.05 | 3.0 hrs | 2.51 |
| Volunteer Electric Coop | - | - | - | - | - |
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 ÷ 187,870 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. Hamilton County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Hamilton 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/hamilton-county