I202105 LOC

Idaho Public Utilities Commission Brad Little,Govemor
PO Box 83720,Boise,ID 83720-0074 Paul Kjellander,Commissioner
Kristine Raper,Commissioner
Eric Anderson,Commissioner
Letter of Concern
May 6, 2021 Report# 1202105
Pat Darras
Intermountain Gas Company
400 N 411 St.
Bismarck, ND 58501
Dear Mr. Darras:
On May 3-5, 2021 representatives of the Idaho Public Utilities Commission, Pipeline Safety,
pursuant to Chapter 601 of Title 49, United States Code, conducted a Boise Field Audit.
As a result of the inspection, it appears there are area(s) of concern that do not fully meet the
intent of the pipeline safety regulations Title 49, Code of Federal Regulations, Part 192 for
calendar year 2021.
The item(s) listed below are of concern:
1. § 192.199 Requirements for design of pressure relief and limiting devices.
(e) Have discharge stacks, vents, or outlet ports designed to prevent accumulation of
water, ice, or snow, located where gas can be discharged into the atmosphere without
undue hazard;
During the inspection it was noted that Regulator station #40090 relief stack is directly below
overheard power lines which could result in an undue hazard if it were to vent during an
overpressure event. Please see attached photos of this concern.
The above mentioned items were brought to the attention of your representatives during the
written exit interview. We would request that you review these matters and respond in writing
within 30 days regarding the above issue including any planned corrective actions.
If you have any questions concerning this notice, please contact me at [phone]. All
written responses should be addressed to me at: 11311 W Chinden Blvd, Ste 201-A, Boise,
Idaho 83714 or you can fax your response to [phone].
11331 W.Chinden Blvd.,Building 8,Suite 201-A,Boise ID 83714
Telephone:[phone] Facsimile:[phone]

Because of the good faith that you have exhibited up to this time, we expect that you will take
action to bring your program into compliance with pipeline safety regulations.
We appreciate your attention to this matter and your effort to promote pipeline safety.
5ar
a ely
rin M. Ulmer
Pipeline Safety, Program Manager
Idaho Public Utility Commission
11331 W.Chinden Blvd.,Building 8,Suite 201-A,Boise ID 83714
Telephone:[phone] Facsimile:[phone]