massoutage

County annual report · FIPS 06091

2017 Sierra County, CA Power Outage Report

In 2017, customers in Sierra County, CA went without power for an average of 0.0 hours, a total of 24 customer-hours (California average 2.2 hours). That ranks 23rd worst of 47 California counties and 2693rd of 2,786 nationally.

Summary data CSVJSON
Avg hrs / customer
0.0
2,072 customers
Customer-hours out
24
Peak customers out
8
Outages ≥1,000 out
0
0 of 10,000+ · 2 total
Longest outage
10h 30m
began November 26, 2017
Rank in state
23rd/47
2693rd of 2,786 US

Compared with CA, the US

Sierra County, CA average hours without power per customer compared with state and national averages, 2017Sierra County 0.0 hours, California average 2.2 hours, US average 7.4 hoursSierra CountySierra County0.0hCalifornia averageCalifornia average2.2hUS averageUS average7.4h
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Average hours without power per customer in 2017.

Month by month

CSVJSON
Sierra County, CA customer-hours without power by month, 2017Jan 0, Feb 0, Mar 0, Apr 0, May 0, Jun 0, Jul 0, Aug 0, Sep 0, Oct 0, Nov 20, Dec 4051015200Jan0Feb0Mar0Apr0May0Jun0Jul0Aug0Sep0Oct20Nov4Dec
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Customer-hours; November was the worst month.

Sierra County year over year

CSVJSON
Sierra County, CA: average hours without power per customer by year2015: no data; 2016: no data; 2017: 0.0h; 2018: 7.3h, coverage 91%; 2019: 256.5h, coverage 93%; 2020: 202.8h, coverage 94%; 2021: 121.6h, coverage 95%; 2022: 102.4h, coverage 95%; 2023: 223.2h; 2024: 97.6h; 2025: 62.0h01002003000%50%100%n/a2015n/a20160.0h20177.3h2018256.5h2019202.8h2020121.6h2021102.4h2022223.2h202397.6h202462.0h2025
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Average hours without power per customer. Line: EAGLE-I coverage, share of customers tracked (right axis).

Coverage line is EAGLE-I's share of California customers tracked each year.

Biggest outages in Sierra County, 2017

The 2 outage episodes with the most customers out at once. Times are UTC.

CSVJSON
#Started (UTC)Ended (UTC)DurationPeak outCustomer-hours
1November 26, 2017 17:45November 27, 2017 04:1510h 30m820
2December 17, 2017 17:45December 17, 2017 21:153h 30m14

Outage episodes by size in 2017: 0 reached 100+ customers, 0 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 Sierra County reported on EIA Form 861 for 2017, or their most recent earlier filing. Utility-wide figures, not county-specific.

CSVJSON
UtilityEIA yearSAIDISAIFISAIDI excl. major eventsSAIFI excl. major events
Pacific Gas & Electric Co.20176.2 hrs1.551.9 hrs0.96
Liberty Utilities201726.6 hrs3.9712.9 hrs2.86
Plumas-Sierra Rural Elec Coop-----

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 California's customers in 2017; utilities it does not see are not counted.
  • Hours per customer = outage customer-minutes ÷ 2,072 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. Sierra County has data for 2017–2025.

Cite this report

MassOutage (massoutage.com), Sierra County, CA annual power outage report, 2017, 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/2017/california/sierra-county

summary CSVJSONyears CSVJSONmonths CSVJSONevents CSVJSONutilities CSVJSON
Sierra County by year:20252024202320222021202020192018
Live outages in Sierra County2017 California report2017 US report