# Minnesota Highway Department — Pipeline Safety Interpretation

- **operation:** document
- **citation:** PI-74-0113
- **title:** Minnesota Highway Department — Pipeline Safety Interpretation
- **source type:** guidance
- **agency:** Pipeline and Hazardous Materials Safety Administration
- **status:** guidance
- **official:** true
- **published on:** 1974-05-03
- **effective on:** Not available
- **summary:** PI-74-0113 response to Minnesota Highway Department concerning 192.105.
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- **app url:** https://regulus.evalyn.ai/document/phmsa-interpretation-pi-74-0113
- **source url:** https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/Pipeline/1974/g74-05-03_osendorf_192.105-nlmx.pdf
**body:**

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PI-74-0113
May 3, 1974
Mr. J. G. Osendorf, Utilities Engineer
Minnesota Highway Department
St. Paul, MN 55155
Dear Mr. Osendorf:
This is with regard to the telephone conversation between Mr. Van Alstine of your office and Mr.
Cesar DeLeon of the Office of Pipeline Safety concerning §192.111, 49 CFR.
Mr. Van Alstine's interpretation of §192.111(b) is correct, that a steel pipe in a Class 1 location
that crosses a public road without a casing must use a design factor of 0.60 or less in the design
formula in §192.105. He is also correct in interpreting that a steel pipe in a Class 1 location that
crosses a public road with a casing design in accordance with §192.105.
I trust that this has answered Mr. Van Alstine's particular question. If we can be of further
assistance, please let us know.
Sincerely,
Joseph C. Caldwell
Director
Office of Pipeline Safety
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