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Idaho Power peak demand

3,793 MW

Idaho Power's all-time summer peak demand as stated in its annual report, 2025

unchanged since 2024; +10.8% since 2020 (3,422 MW); +11.3% since 2015 (3,407 MW)

Source: IDACORP, Inc. and Idaho Power Company, Form 10-K, peak demand. Data period 2025. Published .

Idaho Power's all-time system peak demand in megawatts as stated in the annual report for the year, by season: the highest hourly load the utility had served as of that report. It rises only in a year that set a record.

Change and comparison

From 2003 (2,963 MW) to 2025 (3,793 MW), the change was +28.0%.

The largest category is Summer at 3,793 MW; next is Winter at 2,719 MW.

Historical data

Idaho Power peak demand, 2003 to 2025Idaho Power peak demand, 2003 to 2025. Summer: 2,963 in 2003, 3,793 in 2025.01,0002,0003,0004,00020102020SummerMegawattsIdaho Power peak demand, 2003 to 2025Idaho Power peak demand, 2003 to 2025. Summer: 2,963 in 2003, 3,793 in 2025.01,0002,0003,0004,00020102020SummerMegawattsIdaho Power peak demand, 2003 to 2025Idaho Power peak demand, 2003 to 2025. Summer: 2,963 in 2003, 3,793 in 2025.01,0002,0003,0004,00020052010201520202025SummerMegawatts

Source: IDACORP, Inc. and Idaho Power Company, Form 10-K, peak demand. Published .

Data table (23 rows)
PeriodSummer (megawatts)
20032,963
20042,963
20052,963
20063,084
20073,193
20083,214
20093,214
20103,214
20113,214
20123,245
20133,407
20143,407
20153,407
20163,407
20173,422
20183,422
20193,422
20203,422
20213,751
20223,751
20233,751
20243,793
20253,793

Summer and winter records

Megawatts

  1. Summer3,793
  2. Winter2,719

Source: IDACORP, Inc. and Idaho Power Company, Form 10-K, peak demand. Data period 2025. Published .

Data table (2 rows)
Summer and winter records2025 (mw)
Summer3,793
Winter2,719

Summer and winter records over time

Summer and winter records over timeSummer and winter records over time. 2 series. Summer: 2,963 in 2003, 3,793 in 2025.01,0002,0003,0004,00020102020SummerWinterMegawattsSummer and winter records over timeSummer and winter records over time. 2 series. Summer: 2,963 in 2003, 3,793 in 2025.01,0002,0003,0004,00020102020SummerWinterMegawattsSummer and winter records over timeSummer and winter records over time. 2 series. Summer: 2,963 in 2003, 3,793 in 2025.01,0002,0003,0004,00020052010201520202025SummerWinterMegawatts

Source: IDACORP, Inc. and Idaho Power Company, Form 10-K, peak demand. Published .

Every peak the reports print

Every peak demand figure an annual report prints: all-time records with the date they were set, and the year's own peak where a report gives one.

Data table (29 rows)
YearSeasonPeak (MW)DateKind
1998Summer2,747n/aannual
1999Summer2,839n/aannual
2000Summer2,919n/aannual
2001Summer2,570n/aannual
2002Summer2,963n/aannual
2002Summer2,963July 12, 2002record
2003Summer2,944n/aannual
2004Summer2,843n/aannual
2004Winter2,196January 5, 2004annual
2005Summer2,961n/aannual
2005Winter2,345December 15, 2005annual
2006Summer3,050June 27, 2006record
2006Summer3,084July 24, 2006record
2006Winter2,318December 18, 2006annual
2007Summer3,193July 13, 2007record
2008Summer3,214June 30, 2008record
2008Winter2,464January 24, 2008record
2009Winter2,527December 10, 2009record
2011Summer2,973n/aannual
2012Summer3,245July 12, 2012record
2013Summer3,407July 2, 2013record
2015Summer3,402n/aannual
2016Summer3,299n/aannual
2017Summer3,422July 7, 2017record
2021Summer3,751June 30, 2021record
2022Winter2,574December 19, 2022record
2022Winter2,604December 22, 2022record
2024Summer3,793July 22, 2024record
2024Winter2,719January 16, 2024record

Source: IDACORP, Inc. and Idaho Power Company, Form 10-K, peak demand. Published .

Source

Organization
IDACORP, Inc. and Idaho Power Company
Dataset
Form 10-K, peak demand
Geography
Idaho Power's service area: southern Idaho and part of eastern Oregon, stored under Idaho
Time coverage
2003-2025 (summer record), 2007-2025 (winter record); printed annual peaks from 1998
Update frequency
Annual; the 10-K for a year is filed in February of the next
Published
Original file
https://data.sec.gov/submissions/CIK0001057877.json
Methodology
https://www.sec.gov/Archives/edgar/data/1057877/000105787726000028/ida-20251231.htm
License
Public record. SEC filing by a registrant; the figures are the registrant's.
Our copy
Form 10-K, peak demand

Caveats

  • The series is the all-time record as each year's report states it, not the year's peak. It steps up in a year that set a record and repeats the prior figure otherwise. The observation's period is the fiscal year of the report; the date the record was set is in the table.
  • The year's own peak is printed only in some reports (none for 2009, 2010, 2014, 2018 to 2020, 2023 and 2025), so annual peaks are kept in the table as printed and not carried as a series.
  • The scope is Idaho Power's system, which serves southern Idaho and a corner of eastern Oregon; Rocky Mountain Power's eastern Idaho load and the northern cooperatives are not in it.
  • Peak demand is hourly system load as the report states it; several reports note that demand response programs reduced the figure at the hour of the peak.
  • The report calls the summer record the system peak; a 2006 report notes a record set in June and surpassed in July of the same year, and the 2022 report a winter record set on December 19 and surpassed on December 22, so both figures are in the table.
  • Figures are taken from the sentences of the report, not from a table; a report that changes its wording fails the puller rather than silently missing a year.

Cite

Cite this page as Understand Idaho, “Idaho Power peak demand”, https://understandidaho.com/energy/peak-demand/, retrieved on the date you read it, and the publisher named above for the figures themselves. The dataset behind it is described in the data catalog.

This page was last updated .