County annual report · FIPS 53053
2015 Pierce County, WA Power Outage Report
In 2015, customers in Pierce County, WA went without power for an average of 6.3 hours, a total of 1.2M customer-hours (Washington average 9.1 hours). That ranks 9th worst of 23 Washington counties and 436th of 2,484 nationally.
Compared with WA, the US
Coverage line is EAGLE-I's share of Washington customers tracked each year.
Biggest outages in Pierce 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 | October 21, 2015 23:00 | October 22, 2015 06:45 | 7h 45m | 38,954 | 88K |
| 2 | August 29, 2015 13:15 | September 3, 2015 16:45 | 5d 3h | 38,940 | 448K |
| 3 | November 17, 2015 11:30 | November 18, 2015 15:00 | 1d 3h | 27,364 | 136K |
| 4 | December 9, 2015 08:15 | December 14, 2015 11:15 | 5d 3h | 19,327 | 277K |
| 5 | October 10, 2015 08:15 | October 15, 2015 08:00 | 4d 23h | 6,624 | 22K |
| 6 | October 19, 2015 09:00 | October 19, 2015 10:30 | 1h 30m | 3,913 | 5,869 |
| 7 | December 7, 2015 01:30 | December 8, 2015 22:45 | 1d 21h | 3,649 | 36K |
| 8 | November 22, 2015 19:00 | November 23, 2015 02:45 | 7h 45m | 3,225 | 14K |
| 9 | September 17, 2015 16:45 | September 23, 2015 09:15 | 5d 16h | 3,212 | 2,123 |
| 10 | October 30, 2015 14:30 | October 30, 2015 20:30 | 6h | 3,118 | 5,247 |
Outage episodes by size in 2015: 46 reached 100+ customers, 23 reached 1,000+ customers, 4 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 Pierce 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 |
|---|---|---|---|---|---|
| Puget Sound Energy Inc | 2015 | 12.7 hrs | 2.18 | 2.7 hrs | 1.04 |
| PUD No 1 of Lewis County | 2015 | 7.6 hrs | 2.05 | 4.4 hrs | 1.30 |
| Peninsula Light Company | 2015 | 5.1 hrs | 2.88 | 58 min | 0.47 |
| Bonneville Power Administration | - | - | - | - | - |
| Puget Sound Energy Inc,pugetsoundenergy | - | - | - | - | - |
| City of Tacoma - (WA) | - | - | - | - | - |
| PUD No 3 of Mason County | - | - | - | - | - |
| Tanner Electric Coop | - | - | - | - | - |
| City of Milton - (WA) | - | - | - | - | - |
| Elmhurst Mutual Power & Light Co | - | - | - | - | - |
| Lakeview Light & Power | - | - | - | - | - |
| Ohop Mutual Light Company, Inc | - | - | - | - | - |
| Parkland Light & Water Company | - | - | - | - | - |
| Town of Eatonville - (WA) | - | - | - | - | - |
| Town of Ruston - (WA) | - | - | - | - | - |
| Town of Steilacoom | - | - | - | - | - |
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 Washington's customers in 2015; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 190,282 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. Pierce County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Pierce County, WA 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/washington/pierce-county