20260420Notice_of_Application_Order_No_37010.pdf

Office of the Secretary
Service Date
April 20,2026
BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION
IN THE MATTER OF IDAHO POWER ) CASE NOS. IPC-E-26-09
COMPANY AND PACIFICORP D/B/A ) PAC-E-26-06
ROCKY MOUNTAIN POWER'S )
APPLICATION FOR CERTIFICATES OF ) NOTICE OF APPLICATION
PUBLIC CONVENIENCE AND NECESSITY )
FOR SEGMENT E-8 OF THE GATEWAY ) NOTICE OF INTERVENTION
WEST 500-KV TRANSMISSION LINE ) DEADLINE
ORDER NO. 37040
On April 3, 2026, Idaho Power Company ("Idaho Power") and PacifiCorp d/b/a Rocky
Mountain Power("Rocky Mountain")(collectively the"Companies"or"each Company")applied
to the Idaho Public Utilities Commission ("Commission") requesting a Certificate of Public
Convenience and Necessity ("CPCN") for each Company permitting the commencement of
construction for Segment E-8 of the Gateway West 500-kilovolt line ("kV") ("Segment E-8"),
which will provide an additional 2,000 megawatts in transmission capacity ("Application").
Application at 2. The Companies request that this matter be processed by Modified Procedure and
that the Commission issue each Company a CPCN no later than October 31, 2026.Id.
The Commission now issues this Notice of Application and sets deadlines for interested
persons to intervene.
NOTICE OF APPLICATION
YOU ARE HEREBY NOTIFIED that the Companies represent that Segment E-8 is a 133
mile long 500-kV line that will start at the Midpoint substation, near Jerome, Idaho, and will run
to the Hemingway Substation,which is near Melba,Idaho.Id. at 4. Segment E-8 will also connect
to Idaho Power's proposed 500-kV Mayfield substation. Id. A map illustrating Segment E-8 is
included in the Direct Testimony of Jared L. Ellsworth Exhibit No. 2 that was filed with the
Application.
YOU ARE FURTHER NOTIFIED that the Companies represent that Segment E-8 will
consist of approximately 540 lattice towers. Application at 10. Further, the Companies represent
that the average distance between the towers will be between 1,200 to 1,300 feet and that the height
of the towers will be anywhere between 145 to 199 feet.Id.
NOTICE OF APPLICATION
NOTICE OF INTERVENTION DEADLINE
ORDER NO. 37010 1

YOU ARE FURTHER NOTIFIED that the Companies represent that Segment E-8 will
add transmission capacity and deliver energy to the Treasure Valley from Mountain Home and
Magic Valley, in addition to supporting transfers bilaterally between these regions. Id. at 5. The
Companies represent that Segment E-8 will bolster transmission capability and support load
growth and interconnection ability for new generation resources in the Magic Valley and Treasure
Valley regions. Id. at 12. Idaho Power will hold 99 percent ownership in Segment E-8 and
PacifiCorp will hold the remaining 1 percent.Id. at 5.
YOU ARE FURTHER NOTIFIED that the Companies represent that pre-construction
activities including a right-of-way granted by the Bureau of Land Management, various surveys,
easements acquisition, and engineering designs, as well as permitting activity,have been going on
since 2018. Id. at 8-9. The Companies represent that Segment E-8 construction will begin in
October 2027 and will be completed in three phases.Id. at 11-12.Phases one and two will connect
Hemmingway to Mayfield and Phase three will connect Mayfield to Midpoint. Id. at 12. Phase
three is expected to begin in 2030.Id.
YOU ARE FURTHER NOTIFIED that the Application and testimony are available for
public inspection during regular business hours at the Commission's office. These documents are
also available on the Commission's website at www.puc.idaho.gov. Click on the "ELECTRIC"
icon, select"Open Cases," and click on the case number as shown on the front of this document.
YOU ARE FURTHER NOTIFIED that all proceedings in this case will be held pursuant
to the Commission's jurisdiction under Title 61 of the Idaho Code, and that all proceedings in this
matter will be conducted pursuant to the Commission's Rules of Procedure, IDAPA 31.01.01.000
et seq.
NOTICE OF INTERVENTION DEADLINE
YOU ARE FURTHER NOTIFIED that persons desiring to intervene in this matter to
obtain parties' rights of participation must file a Petition to Intervene with the Commission
pursuant to this Commission's Rules of Procedure 72 and 73, IDAPA 31.01.01.072 and -.073.
Persons who wish to intervene as a party must file a Petition to Intervene no later than 21
days after the date of service of this Order. Such persons shall also provide the Commission
Secretary with their email address to facilitate further communications. After the intervention
deadline runs, the Commission Secretary shall issue a Notice of Parties that identifies the parties
NOTICE OF APPLICATION
NOTICE OF INTERVENTION DEADLINE
ORDER NO. 37010 2

and assigns exhibit numbers to each parry. Once the Notice of Parties has issued, Commission
Staff shall informally confer with the Company and any intervening parties about how to further
process this case and shall then report back to the Commission on a proposed case schedule.
YOU ARE FURTHER NOTIFIED that persons who would like to present their views
without parties' rights of participation and cross-examination do not have to intervene but may
present their views by submitting written comments to the Commission.
YOU ARE FURTHER NOTIFIED that the following people are designated as the
Companies' representatives in this matter:
For Idaho Power: For Rocky Mountain:
Lisa Lance Joe Dallas
Tim Tatum 925 NE Multnomah Street, Suite 2000
Connie Aschenbrenner Portland, OR 97232
1221 West Idaho Street(83702) joseph.dallaskpacificorp.com
P.O. Box 70
Boise, ID 83707 Jana Saba
llancegidahopower.com 1407 West North Temple, Suite 330
dockets(cr�,idahopower.com Salt Lake City, UT 84116
ttatum(a)idahopower.com jana.saba(kpacificorp.com
c aschenbrennergidahopower.com
ORDER
IT IS HEREBY ORDERED that persons desiring to intervene in this matter must file a
Petition to Intervene no later than 21 days from the service date of this Order. Once the deadline
has passed, the Commission Secretary shall prepare and issue a Notice of Parties.
IT IS FURTHER ORDERED that, after the Notice of Parties has issued,Commission Staff
shall confer with the parties regarding a procedural schedule for this matter including,if necessary,
a hearing in this matter.
IT IS FURTHER ORDERED that parties comply with Order No. 35375, issued April 21,
2022. Generally, all pleadings should be filed with the Commission electronically and will be
deemed timely filed when received by the Commission Secretary.See Rule 14.02. Service between
parties should continue to be accomplished electronically when possible. However, voluminous
discovery-related documents may be filed and served on CD-ROM or a USB flash drive.
NOTICE OF APPLICATION
NOTICE OF INTERVENTION DEADLINE
ORDER NO. 37010 3

DONE by Order of the Idaho Public Utilities Commission at Boise, Idaho this 20th day of
April 2026.
G
EDWARD LODGE, PR „ DENT
/7-L ;4�
JO R. HAMMOND JR., COMMISSIONER
DAYN HAKDIE, COMMISSIONER
ATTEST:
Monic 135111`oWanchez
Commission Secretary
I:\Legal\ELECTRIC\IPCE2609_PACE2606_CPCN\ordm\ntc_app_int_kr.docx
NOTICE OF APPLICATION
NOTICE OF INTERVENTION DEADLINE
ORDER NO. 37010 4