County annual report · FIPS 48111
2015 Dallam County, TX Power Outage Report
In 2015, customers in Dallam County, TX went without power for an average of 6.2 hours, a total of 8,017 customer-hours (Texas average 1.9 hours). That ranks 64th worst of 238 Texas counties and 443rd 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 Dallam 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 | December 19, 2015 20:45 | December 20, 2015 02:30 | 5h 45m | 1,617 | 2,600 |
| 2 | May 26, 2015 21:45 | May 27, 2015 00:45 | 3h | 1,157 | 1,448 |
| 3 | September 28, 2015 19:15 | September 28, 2015 22:45 | 3h 30m | 229 | 255 |
| 4 | December 23, 2015 13:45 | December 23, 2015 17:45 | 4h | 136 | 409 |
| 5 | August 2, 2015 02:45 | August 2, 2015 06:00 | 3h 15m | 91 | 206 |
| 6 | December 7, 2015 21:30 | December 7, 2015 23:30 | 2h | 70 | 132 |
| 7 | July 6, 2015 23:15 | July 6, 2015 23:45 | 30m | 64 | 32 |
| 8 | August 3, 2015 08:00 | August 4, 2015 16:45 | 1d 8h | 64 | 240 |
| 9 | December 8, 2015 04:15 | December 8, 2015 10:15 | 6h | 64 | 353 |
| 10 | October 28, 2015 04:00 | October 28, 2015 07:15 | 3h 15m | 63 | 177 |
Outage episodes by size in 2015: 4 reached 100+ customers, 2 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 Dallam 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 |
|---|---|---|---|---|---|
| Southwestern Public Service Co | 2015 | 3.4 hrs | 1.53 | 2.1 hrs | 1.25 |
| Tri-County Electric Coop, Inc (OK) | - | - | - | - | - |
| Rita Blanca Electric Coop, Inc | - | - | - | - | - |
| Southwestern Electric Coop Inc - (NM) | - | - | - | - | - |
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 ÷ 1,292 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. Dallam County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Dallam 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/dallam-county