County annual report · FIPS 40141
2018 Tillman County, OK Power Outage Report
In 2018, customers in Tillman County, OK went without power for an average of 13.2 hours, a total of 44K customer-hours (Oklahoma average 2.7 hours). That ranks 6th worst of 77 Oklahoma counties and 425th of 2,798 nationally.
Compared with OK, the US and 2017
Coverage line is EAGLE-I's share of Oklahoma customers tracked each year.
Biggest outages in Tillman 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 | July 30, 2018 09:30 | July 30, 2018 14:00 | 4h 30m | 1,071 | 1,704 |
| 2 | June 14, 2018 00:00 | June 14, 2018 03:00 | 3h | 988 | 2,009 |
| 3 | December 27, 2018 00:15 | December 27, 2018 08:15 | 8h | 847 | 4,432 |
| 4 | May 2, 2018 23:00 | May 5, 2018 00:15 | 2d 1h | 788 | 8,604 |
| 5 | May 27, 2018 20:30 | May 28, 2018 01:45 | 5h 15m | 709 | 3,299 |
| 6 | June 7, 2018 23:15 | June 8, 2018 15:45 | 16h 30m | 592 | 5,443 |
| 7 | November 12, 2018 08:15 | November 12, 2018 12:00 | 3h 45m | 452 | 972 |
| 8 | August 17, 2018 22:45 | August 18, 2018 11:00 | 12h 15m | 418 | 2,221 |
| 9 | July 3, 2018 03:00 | July 3, 2018 05:30 | 2h 30m | 387 | 937 |
| 10 | June 25, 2018 10:45 | June 25, 2018 20:00 | 9h 15m | 294 | 1,122 |
Outage episodes by size in 2018: 25 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 Tillman 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 |
|---|---|---|---|---|---|
| Public Service Co of Oklahoma | 2018 | 2.1 hrs | 1.34 | 1.7 hrs | 1.17 |
| Cotton Electric Coop, Inc | 2018 | 3.6 hrs | 1.91 | 3.3 hrs | 1.84 |
| Southwest Rural Elec Assn Inc | - | - | - | - | - |
| City of Frederick - (OK) | - | - | - | - | - |
| City of Manitou - (OK) | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 89% of Oklahoma's customers in 2018; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 3,295 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. Tillman County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Tillman County, OK 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/oklahoma/tillman-county