County annual report · FIPS 40141
2015 Tillman County, OK Power Outage Report
In 2015, customers in Tillman County, OK went without power for an average of 49.8 hours, a total of 164K customer-hours (Oklahoma average 5.1 hours). That ranks 5th worst of 74 Oklahoma counties and 46th of 2,484 nationally.
Compared with OK, the US
Coverage line is EAGLE-I's share of Oklahoma customers tracked each year.
Biggest outages in Tillman 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 27, 2015 15:00 | December 31, 2015 00:15 | 3d 9h | 3,246 | 134K |
| 2 | May 25, 2015 08:45 | May 26, 2015 08:45 | 1d | 640 | 15K |
| 3 | May 7, 2015 01:00 | May 7, 2015 03:00 | 2h | 634 | 1,268 |
| 4 | July 5, 2015 00:15 | July 5, 2015 07:30 | 7h 15m | 633 | 4,433 |
| 5 | February 25, 2015 22:30 | February 25, 2015 22:45 | 15m | 631 | 158 |
| 6 | November 29, 2015 02:30 | November 29, 2015 06:15 | 3h 45m | 623 | 2,188 |
| 7 | December 27, 2015 08:00 | December 27, 2015 14:00 | 6h | 620 | 3,560 |
| 8 | May 23, 2015 15:45 | May 23, 2015 16:45 | 1h | 574 | 505 |
| 9 | May 17, 2015 00:15 | May 17, 2015 02:00 | 1h 45m | 573 | 865 |
| 10 | May 7, 2015 21:45 | May 7, 2015 22:00 | 15m | 417 | 104 |
Outage episodes by size in 2015: 14 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 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 |
|---|---|---|---|---|---|
| Public Service Co of Oklahoma | 2015 | 6.7 hrs | 1.58 | 1.9 hrs | 1.17 |
| Cotton Electric Coop, Inc | 2015 | 18.2 hrs | 3.18 | 3.3 hrs | 1.92 |
| 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 n/a of Oklahoma's customers in 2015; 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, 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/oklahoma/tillman-county