I202615 NOPV

Idaho Public Utilities Commission Brad Little,Governor
P.O.Box 83720,Boise, ID 83720.0074 Edward Lodge,President
John R.Hammond,Jr.,Commissioner
Dayn Hardie,Commissioner
August 13, 2026 Report# I202615
Pat Darras—Vice President of Engineering& Operations Services
Intermountain Gas Company
400 N 41h St.
Bismarck, ND 58501
Dear Mr. Pat Darras,
On August 101h and 11 th, 2026 the Idaho Public Utilities Commission ("Commission"), Pipeline
Safety Division ("Staff'), conducted a field audit of the Idaho Falls, Idaho District of
Intermountain Gas Company("IGC") pursuant to Chapter 601 of Title 49, United States Code.
Staff observed that some of the Idaho natural gas system(s) owned and operated by IGC
("Company")was out of compliance on item(s). This results in probable violations of the pipeline
safety regulations Title 49, Code of Federal Regulations, Part 192. The probable violations are as
follows:
PROBABLE VIOLATIONS)
1. 49 CFR 4192.605 Procedural manual for operations, maintenance, and emergencies.
General. Each operator shall prepare and follow for each pipeline, a manual of written
procedures for conducting operations and maintenance activities and for emergency
response. For transmission lines, the manual must also include procedures for handling
abnormal operations. This manual must be reviewed and updated by the operator at
intervals not exceeding 15 months, but at least once each calendar year. This manual must
be prepared before operations of a pipeline system commence. Appropriate parts of the
manual must be kept at locations where operations and maintenance activities are
conducted.
OPS 500 Regulator Inspection and Maintenance
4. REGULATOR INSPECTION AND MAINTENANCE
4.1 Regulators shall be set to lockup at the designated lockup pressure, with some
allowance for lockup fluctuation,but the regulator shall lockup at a pressure equal
to or less than the MAOP.
2. 49 CFR & 192.703 General
(a) No person may operate a segment of pipeline, unless it is maintained in accordance
with this subpart.
IGC IDAHO FALLS FIELD AUDIT PROBABLE VIOLATIONS LETTER— Page 1 of 3

3. 49 CFR 4192.739 Pressure limiting and regulating stations: Inspection and testing.
(a) Each pressure limiting station, relief device (except rupture discs), and pressure
regulating station and its equipment must be subjected at intervals not exceeding 15
months, but at least once each calendar year, to inspections and tests to determine that it
is—
(1) In good mechanical condition;
(2)Adequate from the standpoint of capacity and reliability of operation for the service
in which it is employed;
(3) Except as provided in paragraph (b) of this section, set to control or relieve at the
correct pressure consistent with the pressure limits of§ 192.201(a); and
(4) Properly installed and protected from dirt, liquids, or other conditions that might
prevent proper operation.
Finding(s):
Regulator station 48741-RS-60824 primary regulator failed due to metal shavings in the
diaphragm. The regulator locked up as normal after being disassembled and cleaned.
IGC IDAHO FALLS FIELD AUDIT PROBABLE VIOLATIONS LETTER— Page 2 of 3

REQUESTED ACTIONS
A reply to this correspondence is required no later than 45 days from the date of this letter. Please
submit a written reply providing a statement of all relevant facts including a complete description
of the corrective action(s) taken with respect to the above referenced probable violations, and all
actions to be taken to prevent future failures in these areas of concern. This written reply must be
signed by a Company official with authority to bind the Company.
Please send all documents to our office at 11331 W. Chinden Blvd, Boise, Idaho 83714-1021. Be
advised that all material you submit in response to this enforcement action may be a public record
and subject to disclosure under Idaho's Public Records Law. See Idaho Code §§74-101 et seq.
If you wish to dispute any of the above referenced potential violations,you have the right to appear
before the Pipeline Safety Division in an informal conference before September 27, 2026, at the
above address. You have the right to present relevant documents and evidence to the Pipeline
Safety Division at that conference. The Pipeline Safety Division will make available to you any
evidence which indicates that you may have violated the law, and you will have the opportunity to
rebut this evidence. See Commission Orders 35095 and 35334, which can be found at
https://puc.idaho.gov/. If you intend to request an informal conference,please contact the Pipeline
Safety Division no later than September 12, 2026.
If you wish to dispute any of the allegations in this Notice,but do not want an informal conference,
you may send the Pipeline Safety Division a written reply to this Notice. This written reply must
be filed with the Commission on or before September 27,2026,and must be signed by a Company
official with authority to bind the Company. The reply must include a complete statement of all
relevant facts, and all documentation, evidence, and argument the Company submits to refute any
of the above referenced probable violations.
These violations may be subject to any Commission enforcement action as allowed under Idaho
law including, but not limited to, potential civil penalties in accordance with 49 CFR 190.223(a).
If you have any questions concerning this Notice,please contact me at(208) 334-0333. All written
responses should be addressed to me at the above address, or you may fax your response to (208)
334-3762.
We appreciate your attention to this matter and your effort to promote pipeline safety.
Sincerely,
i -
Jeff Brooks
Pipeline Safety, Program Manager
Idaho Public Utilities Commission
11331 W.Chinden Blvd.Ste 201-A Boise ID 83714
Telephone:[phone] Facsimile:[phone]
IGC IDAHO FALLS FIELD AUDIT PROBABLE VIOLATIONS LETTER— Page 3 of 3