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U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

Interpretation Response #PI-72-0101 ([Iowa State Highway Commission] [Mr. William P. Davis])

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

Interpretation Response Details

Response Publish Date:

Company Name: Iowa State Highway Commission

Individual Name: Mr. William P. Davis

Location State: IA Country: US

View the Interpretation Document

Response text:


January 31, 1972

Mr. William P. Davis
Utilities Supervisor
Iowa State Highway Commission
Ames, Iowa 50010

Dear Mr. Davis:

This is in reply to your letter of November 30, 1971, regarding 49 CFR Section 192.111 (c). Your specific question was:

"In the even an existing steel pipe did not meet the minimum design specifications, would you interpret this provision to require encasement of the carrier pipe throughout the entire width of the highway right of way, without exception, or an encasement within the right of way through the traveled portion of the highway as specified as a minimum within State policy and regulations."

Section 192.111 is discussed in the preamble which should answer your particular question. This preamble states that the purpose of the section was to insure that heavier wall pipe is installed across the entire right of way when a pipeline crosses a public road or street. This does not preclude using both encasement and heavier wall pipe in meeting the requirements of this section.

We trust that this answers your question. Should you have any further questions, please contact us.

Original signed by:
Joseph C. Caldwell
Acting Director
Office of Pipeline Safety

Regulation Sections

Section Subject
192.111 Design factor (F) for steel pipe