County annual report · FIPS 47187
2016 Williamson County, TN Power Outage Report
In 2016, customers in Williamson County, TN went without power for an average of 1.0 hours, a total of 118K customer-hours (Tennessee average 2.5 hours). That ranks 20th worst of 51 Tennessee counties and 1815th of 2,391 nationally.
Compared with TN, the US and 2015
Coverage line is EAGLE-I's share of Tennessee customers tracked each year.
Biggest outages in Williamson County, 2016
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | July 19, 2016 12:45 | July 20, 2016 10:15 | 21h 30m | 8,545 | 13K |
| 2 | July 28, 2016 15:30 | July 28, 2016 16:00 | 30m | 8,529 | 4,265 |
| 3 | September 3, 2016 14:00 | September 3, 2016 16:15 | 2h 15m | 6,226 | 5,659 |
| 4 | July 8, 2016 14:15 | July 8, 2016 16:30 | 2h 15m | 6,156 | 4,618 |
| 5 | February 1, 2016 12:30 | February 1, 2016 13:00 | 30m | 5,288 | 1,322 |
| 6 | July 8, 2016 19:30 | July 11, 2016 04:30 | 2d 9h | 4,401 | 20K |
| 7 | August 3, 2016 12:15 | August 3, 2016 22:30 | 10h 15m | 3,281 | 4,196 |
| 8 | January 12, 2016 14:30 | January 12, 2016 23:00 | 8h 30m | 2,761 | 1,578 |
| 9 | July 14, 2016 14:30 | July 15, 2016 02:15 | 11h 45m | 2,730 | 1,129 |
| 10 | November 27, 2016 12:00 | November 27, 2016 13:30 | 1h 30m | 2,444 | 3,666 |
Outage episodes by size in 2016: 80 reached 100+ customers, 21 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 Williamson County reported on EIA Form 861 for 2016, 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 | 2016 | 1.7 hrs | 1.34 | 85 min | 1.25 |
| City of Dickson | 2016 | 3.3 hrs | 2.05 | 3.0 hrs | 1.99 |
| Nashville Electric Service | 2016 | 2.7 hrs | 1.73 | 2.0 hrs | 1.50 |
| Middle Tennessee E M C | - | - | - | - | - |
| Columbia Power System - (TN) | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about n/a of Tennessee's customers in 2016; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 123,583 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. Williamson County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Williamson County, TN annual power outage report, 2016, 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/2016/tennessee/williamson-county