County annual report · FIPS 48397
2017 Rockwall County, TX Power Outage Report
In 2017, customers in Rockwall County, TX went without power for an average of 0.1 hours, a total of 4,213 customer-hours (Texas average 1.6 hours). That ranks 227th worst of 249 Texas counties and 2622nd of 2,786 nationally.
Compared with TX, the US and 2015
Coverage line is EAGLE-I's share of Texas customers tracked each year.
Biggest outages in Rockwall County, 2017
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | December 13, 2017 22:30 | December 14, 2017 01:45 | 3h 15m | 609 | 784 |
| 2 | December 20, 2017 16:30 | December 21, 2017 08:45 | 16h 15m | 170 | 1,436 |
| 3 | December 19, 2017 10:30 | December 19, 2017 21:15 | 10h 45m | 140 | 413 |
| 4 | December 8, 2017 16:30 | December 8, 2017 17:30 | 1h | 116 | 116 |
| 5 | November 23, 2017 18:15 | November 24, 2017 01:15 | 7h | 56 | 147 |
| 6 | December 11, 2017 21:00 | December 11, 2017 21:30 | 30m | 55 | 28 |
| 7 | December 29, 2017 16:00 | December 29, 2017 19:00 | 3h | 43 | 41 |
| 8 | November 27, 2017 14:30 | November 27, 2017 20:00 | 5h 30m | 38 | 115 |
| 9 | December 7, 2017 19:45 | December 7, 2017 21:00 | 1h 15m | 35 | 13 |
| 10 | December 13, 2017 16:00 | December 13, 2017 21:15 | 5h 15m | 33 | 112 |
Outage episodes by size in 2017: 4 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 Rockwall County reported on EIA Form 861 for 2017, 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 |
|---|---|---|---|---|---|
| Oncor Electric Delivery Company LLC | 2017 | 3.4 hrs | 1.69 | 2.4 hrs | 1.49 |
| Farmers Electric Coop, Inc - (TX) | 2017 | 3.4 hrs | 1.95 | 2.2 hrs | 1.41 |
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 Texas's customers in 2017; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 77,029 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. Rockwall County has data for 2015, 2017–2025.
Cite this report
MassOutage (massoutage.com), Rockwall County, TX annual power outage report, 2017, 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/2017/texas/rockwall-county