DAQ-2025-001902

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Huntington Power Plant
8 miles west of Huntington, Utah on Hwy. 3l
P.O. Box 680
Huntington, Utah 84528
March7,2025
Mr. Bryce Bird, Director
Utah Department of Environmental Quality
Division of Air Quality
195 North 1950 West
P.O. Box 144820
Salt Lake City, UT 84114-4820
RE: Outage Notification, Unit 2, Huntington Power Plant (Title V Permit #1501001005)
Dear Mr. Bird:
As required by ll.B.1.f.3c of the Huntington Plant Title V operating permit, the purpose of this letter is to inform you of
a boiler unit outage at the PacifiCorp, Huntington Power Plant. Boiler Unit 2 was removed from service on
Wednesday, March 5h, al8.22 PM to replace stator filters. The maintenance was performed, and stable operation
achieved at 12:05 AM on Friday, March 7th,2025.
Please see the attached Maintenance Outage Report for details.
I am authorized to make this submission on behalf of the owners and operators of the affected source or affected
units for which the submission is made. I certify under penalty of law that I have personally examined, and am
familiar with, the statements and information submitted in this document and all its attachments. Based on my inquiry
of those individuals with primary responsibility for obtaining the information, I certify that the statements and
information are to the best of my knowledge and believe true, accurate, and complete. I am aware that there are
significant penalties for submitting false statements and information, or omitting statements and information, including
the possibility of fine or imprisonment.
For further information on this outage contact Terry Guthrie, Hunter and Huntington Plant Environmental Manager,
a|435-68743?4.
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DEPARTMEN?-6;-
ENVIRONi,ENTAL OdUrY
MAR 2 8 2025
Dllsot oF An ot,^uw
REVIEWED
Initials JBR Date 4/8/2025
Comp Status Meets
File # 10238 Blue 2
outage
Enclosure: U2 Maintenance Outage Report - PacifiCorp, Huntington Plant
Terry Guthrie - Hunter and Huntington Plant Environmential Manager
Scarlet Lewis - Environmential Services - NTO 210
Russ \Mllson - Huntington Plant Files
Outage Report, Huntington Plant Boiler Unit #2 Stator Filter
Change Date:31512025
Date Time Descriotion
3t5t2025 l0:06 AM Unit load lowered in anticipation of outage Shutdown
beginr
315/2025 8:22PM BFO Down-time
begins
3ts/2025 12:44PM Stopped producing electricity
3/6t2025 l:03 PM BFI Start-up begins-
316/2025 7:34PM Started producing electricity
3t6/2025 l0:19 PM <10% heat input from fuel oil BFO
3/612025 l0:19 PM 3 coal mills in service
31712025 l2:05 AM Stable operation (<10% heat input from oil, 3 coal mills in service, baghouse temps
>200 degrees)Start-up ends
BFO - Boiler Fire Out
BFI - Boiler Fire In
All times shown are in Mountain Standard Time.DEPARTMENT OF
E}{VIRONMENTAT OIruITY
l',lAR 2 8 202s
DMSTON OF AtR qr rrw
Boiler Operating Hours -During Trip Outage
UNIT#
Outage Start Date:
Outage End Date:
Outage Description:
Start Date
3/5/2025
3/6/2025
Start Time (BFI)
0:00
19:34
End Date
3/5/2025
3/6/2025
Boiler Opr. Hrs.
End Time (BFO) Duration (hrs) Daily Total
20:22 20.37 20.37
23:59 4.42 4.42
Total: 24.8