Power Out Map
– 0% of Chugach out 0 customers out in Alaska

Power outage history

Chugach Census Area Alaska

The outage record here is too thin for a reliable yearly average. Raw events are listed below.

Worst outage on record Jun 16, 2025 14% of customers out · 90% back in 2.2 hours
Hours without power, average customer per year –h / yr State average 7.4 h · national median 6.6 h
Major outages a year – Peaks over 10% of customers or 50,000 customers
Typical time to restore 90% 2hours Median across major outages, from the peak
Longest single outage 10hours Apr 5, 2017, over 1% of customers out
Outage hours on storm days – Share falling on days with a NOAA storm report here
Worst year –
Electricity customers 3,996 ORNL customer model · 0 well-covered years

Every day since 2015

Eleven years, one night at a time

Each cell is a day. The brighter it is, the larger the share of Chugach's customers who were without power at that day's worst moment.

20152016201720182019202020212022202320242025
0%100% of customers out

Year by year

Hours in the dark, per customer

Chugach, hours without power per customer

ChugachUS median countyAlaska average
0 2 4 6 8 10 ’17 ’18 ’19 ’20 ’21 ’22 ’23 ’24 ’25 AK 7.4 US 6.6

The record

The biggest outages since 2015

Ranked by customer-hours lost: customers out multiplied by how long they stayed out. Times are local.

Began Storm Peak out Share Lasted 90% restored Customer-hours
Jun 16, 2025 No storm report 567 14% 2.2 h 2.2 h 1.3k
Apr 5, 2017 No storm report 63 2% 10 h – 630
Sep 18, 2019 No storm report 152 4% 4.0 h – 453
Jul 21, 2020 No storm report 81 2% 6.0 h – 365
Jul 21, 2017 No storm report 69 2% 4.2 h – 293
Jan 14, 2025 No storm report 56 1% 4.0 h – 224
Oct 21, 2021 No storm report 78 2% 2.2 h – 134
Dec 15, 2021 No storm report 75 2% 1.0 h – 75
Mar 28, 2025 No storm report 76 2% 48 min – 57
Aug 7, 2018 No storm report 79 2% 30 min – 40
Jun 10, 2019 No storm report 78 2% 30 min – 39

When it happens

The outage clock

Customer-hours out by month (rings, January innermost) and local hour, 2018–2025.

00061218 Jan inside

What was happening

Weather behind the outages

Each outage is matched to NOAA storm reports for Chugach from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.

  • No storm on record 100%

Who keeps the lights on

Utilities serving Chugach

As each utility reports to the Energy Information Administration for its whole Alaska territory, not this county alone. Outage minutes include major storm days.

Utility Type Outage min / yr Excl. major storms Outages / yr Residential ¢/kWh Customers
Copper Valley Elec Assn, Inc AK – – – 26.3 16k
Cordova Electric Coop, Inc AK – – – 37.7 4.7k
Tatitlek Electric Utility AK – – – – 125
Chitina Electric Inc AK – – – – 100

EIA Form 861, latest year each utility reported. Outage minutes are SAIDI, the yearly minutes the average customer goes without power; outages a year are SAIFI.

Next door

Neighbouring counties

Across Alaska

Where it is darkest

Hours / yr64+

All Alaska counties →

About these numbers

Notes

Outages come from the EAGLE-I record of utility outage maps collected every 15 minutes by Oak Ridge National Laboratory. Hours without power are customer-hours divided by the county's 3,996 electricity customers. Averages use well-covered years from 2018. Outages shorter than 15 minutes, and utilities that publish no outage map, are not in the record, so these figures understate the total. How every number is made →