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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-72-0117

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

Interpretation Response Details

Response Publish Date:

Company Name:

Individual Name:

Country: UK

View the Interpretation Document

Response text:

Telegraphic message

Office of Pipeline Safety
Department of Transportation
400 Sixth Street, S.W.
Washington, D.C. 20590

Date Prepared 11/16/72

To:          IMEG of Britain Limited
              London Telex 263508
              Attention: I. Paul

Reference your telegram of November 8, 1972, requesting interpretation and comments regarding construction of parallel large diameter natural gas transmission pipelines on common right of way.  Department of Transportation safety standards do not specify minimum distance between pipeline centerlines, minimum distance for heavy construction equipment from existing operating line, or distance from operating line that rock blasting is permitted.  Distances are determined by the builder based on practical considerations of experience, safety, construction costs, maintenance ease and need for cathodic protection as appropriate.  Section 192.325(a), on underground clearance in general construction requirements, provides that each transmission line must be installed with at least 12 inches of clearance from any other underground structure, or provided with protection from damage that might result from proximity to other structure.

Joseph C. Caldwell

Director, Office of Pipeline Safety, TSA-30
Office of the Secretary
Department of Transportation

Regulation Sections

Section Subject
192.325 Underground clearance