County annual report · FIPS 21111
2018 Jefferson County, KY Power Outage Report
In 2018, customers in Jefferson County, KY went without power for an average of 8.9 hours, a total of 3.5M customer-hours (Kentucky average 5.7 hours). That ranks 20th worst of 118 Kentucky counties and 630th of 2,798 nationally.
Compared with KY, the US and 2017
Coverage line is EAGLE-I's share of Kentucky customers tracked each year.
Biggest outages in Jefferson 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 | November 15, 2018 03:15 | November 20, 2018 04:45 | 5d 1h | 79,447 | 1.9M |
| 2 | May 31, 2018 11:15 | June 3, 2018 05:45 | 2d 18h | 27,245 | 229K |
| 3 | July 20, 2018 17:30 | July 25, 2018 01:45 | 4d 8h | 26,689 | 524K |
| 4 | June 26, 2018 11:30 | June 28, 2018 07:00 | 1d 19h | 24,759 | 159K |
| 5 | October 20, 2018 09:30 | October 23, 2018 09:45 | 3d | 12,283 | 57K |
| 6 | March 28, 2018 09:45 | March 29, 2018 07:15 | 21h 30m | 9,305 | 9,047 |
| 7 | March 29, 2018 11:00 | March 30, 2018 04:45 | 17h 45m | 9,303 | 4,567 |
| 8 | May 11, 2018 11:00 | May 12, 2018 21:15 | 1d 10h | 7,603 | 2,629 |
| 9 | February 6, 2018 13:00 | February 7, 2018 01:45 | 12h 45m | 6,841 | 7,154 |
| 10 | December 27, 2018 13:00 | December 28, 2018 22:45 | 1d 9h | 5,788 | 24K |
Outage episodes by size in 2018: 238 reached 100+ customers, 72 reached 1,000+ customers, 5 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 Jefferson 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 |
|---|---|---|---|---|---|
| Salt River Electric Coop Corp | 2018 | 5.6 hrs | 1.69 | 1.6 hrs | 0.98 |
| Shelby Energy Coop, Inc - (KY) | 2018 | 6.5 hrs | 2.38 | 2.0 hrs | 1.25 |
| Louisville Gas & Electric Co | 2018 | 8.2 hrs | 1.48 | 86 min | 0.88 |
| Kentucky (statewide) | - | - | - | - | - |
| LG&E and KU | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 78% of Kentucky's customers in 2018; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 390,033 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. Jefferson County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Jefferson County, KY 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/kentucky/jefferson-county