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Interpretation Response #PI-81-0114


Below is the interpretation response detail and a list of regulations sections applicable to this response.

Interpretation Response Details

Response Publish Date: 09-04-1981

Location state: ID    Country: US

View the Interpretation Document

Request text:

Intermountain Gas Company
555 South Cole Road
P.O. Box 7608
Boise, Idaho 83707

August 20, 1981

Department of Transportation
400 7th Street, S.W.
Washington, D.C. 20590

RE: Desired Interpretation

Dear Sir:

We have presently a buried 4” steel coated and wrapped natural gas main that is cased in 6” steel and has a MAOP of 60psig (not a transmission pipeline).

Can a building be constructed over this cased main?

Our finding from CFR 192.361 and 192.323 is that it would be permitted with proper venting and maintenance procedures.

Your opinion on this matter would be appreciated.

Best Regards
Mike Anderson
Mechanical Engineer.


Response text:

September 4, 1981

Mr. Mike Anderson Mechanical Engineer Intermountain Gas Company
555 South Cole Road
P.O. Box 7698
Boise, Idaho 83767

Dear Mr. Anderson:
Thank you for your letter of August 20, 1981 asking whether a building may be constructed over a
cased natural gas main.

The Federal safety standards for natural gas pipelines in 49 CFR Part 192 do not prohibit the
operation of a cased main or other gas pipeline underneath a building.  Therefore, as long as there
is no State of local restriction, an operator of a gas pipeline may construct a building over it,
and since Part 192 does not apply to persons other than operators, such persons may construct a
building over a gas pipeline absent any State or local restriction.

The regulations you refer to would not apply to the situation of a building being constructed over
a cased main.  Section
192.323, “Casing,” is a construction requirement that applies when a transmission line or main is
being installed with a casing under an existing railroad or highway. Also, section 192.361 applies
to service lines, not mains, and like section
192.323, it applies at the time the pipeline is under construction.

Of course, an operator who has a pipeline over which a building is being constructed must, as
required by section
192.613, take appropriate action in response to any changes in class location, corrosion control
measures, or other unusual operating or maintenance conditions that the building would create.
Sincerely, Original Sign By Melvin A. Judah
Acting Associate Director for
Pipeline Safety Regulation
Materials Transportation Bureau
Intermountain Gas Company
555 South Cole Road
P.O. Box 7608
Boise, Idaho 83707

August 20, 1981

Department of Transportation
400 7th Street, S.W.
Washington, D.C. 20590

RE:        Desired Interpretation

Dear Sir:
We have presently a buried 4” steel coated and wrapped natural gas main that is cased in 6” steel
and has a
MAOP of 60psig (not a transmission pipeline).

Can a building be constructed over this cased main?

Our finding from CFR 192.361 and 192.323 is that it would be permitted with proper venting and
maintenance procedures.

Your opinion on this matter would be appreciated.
Best Regards
Mike Anderson
Mechanical Engineer.


Regulation Sections

Section Subject
§ 192.323 Casing