County annual report · FIPS 48397
2015 Rockwall County, TX Power Outage Report
In 2015, customers in Rockwall County, TX went without power for an average of 1.4 hours, a total of 105K customer-hours (Texas average 1.9 hours). That ranks 176th worst of 238 Texas counties and 1557th of 2,484 nationally.
Compared with TX, the US
Coverage line is EAGLE-I's share of Texas customers tracked each year.
Biggest outages in Rockwall County, 2015
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | May 25, 2015 18:00 | May 26, 2015 09:15 | 15h 15m | 4,656 | 13K |
| 2 | February 1, 2015 01:00 | February 1, 2015 02:15 | 1h 15m | 3,699 | 3,701 |
| 3 | May 16, 2015 14:00 | May 16, 2015 16:00 | 2h | 3,651 | 1,505 |
| 4 | May 26, 2015 17:15 | May 28, 2015 12:45 | 1d 19h | 3,602 | 17K |
| 5 | January 14, 2015 18:00 | January 15, 2015 15:15 | 21h 15m | 3,485 | 1,627 |
| 6 | May 10, 2015 14:15 | May 10, 2015 23:00 | 8h 45m | 3,294 | 4,895 |
| 7 | January 30, 2015 21:15 | January 30, 2015 21:45 | 30m | 2,840 | 1,177 |
| 8 | July 4, 2015 08:15 | July 4, 2015 10:15 | 2h | 2,782 | 1,377 |
| 9 | March 16, 2015 21:45 | March 17, 2015 07:30 | 9h 45m | 2,687 | 6,318 |
| 10 | July 26, 2015 06:30 | July 26, 2015 16:00 | 9h 30m | 2,463 | 9,060 |
Outage episodes by size in 2015: 47 reached 100+ customers, 12 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 2015, 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 | 2015 | 4.5 hrs | 1.88 | 2.4 hrs | 1.36 |
| Farmers Electric Coop, Inc - (TX) | 2015 | 3.5 hrs | 1.75 | 2.0 hrs | 1.29 |
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 2015; 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, 2015, 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/2015/texas/rockwall-county