County annual report · FIPS 48111
2018 Dallam County, TX Power Outage Report
In 2018, customers in Dallam County, TX went without power for an average of 5.3 hours, a total of 6,911 customer-hours (Texas average 2.4 hours). That ranks 97th worst of 253 Texas counties and 993rd of 2,798 nationally.
Compared with TX, the US and 2017
Coverage line is EAGLE-I's share of Texas customers tracked each year.
Biggest outages in Dallam 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 | December 27, 2018 07:45 | December 28, 2018 04:45 | 21h | 1,713 | 3,010 |
| 2 | December 3, 2018 04:45 | December 3, 2018 07:30 | 2h 45m | 219 | 590 |
| 3 | August 23, 2018 21:45 | August 24, 2018 01:15 | 3h 30m | 218 | 727 |
| 4 | March 5, 2018 06:00 | March 5, 2018 07:15 | 1h 15m | 108 | 120 |
| 5 | April 13, 2018 21:00 | April 13, 2018 23:15 | 2h 15m | 84 | 188 |
| 6 | March 18, 2018 23:15 | March 19, 2018 09:00 | 9h 45m | 76 | 563 |
| 7 | June 8, 2018 10:45 | June 8, 2018 19:30 | 8h 45m | 56 | 245 |
| 8 | March 15, 2018 23:00 | March 16, 2018 02:45 | 3h 45m | 52 | 195 |
| 9 | March 23, 2018 21:45 | March 24, 2018 01:15 | 3h 30m | 47 | 142 |
| 10 | August 23, 2018 20:00 | August 23, 2018 20:15 | 15m | 47 | 12 |
Outage episodes by size in 2018: 4 reached 100+ customers, 1 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 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 |
|---|---|---|---|---|---|
| Southwestern Public Service Co | 2018 | 2.0 hrs | 1.08 | 1.9 hrs | 1.06 |
| 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 90% of Texas's customers in 2018; 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, 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/texas/dallam-county