Regulations of Connecticut State Agencies
A gas pipe line shall not be laid under a railroad or highway or other facilities traversed by motor vehicles except as provided as follows:
(1) At railroad crossings, the pipe shall be enclosed in a casing which meets the minimum requirements and specifications of the latest edition of the American Petroleum Institute Code pertaining to "Pipe Line Crossings Under Railroad Tracks." Such crossngs shall be made as nearly as practicable at an angle of 90° to the center line of the railroad.
(2) At highway crossings, the pipe shall be enclosed in a casing constructed in the same manner as required in subdivision (1) above, except that the minimum distance from the top of the casing to the traveled surface of the road shall be not less than three feet six inches and the casing shall extend to a point not less than fifteen feet byond the edge of the pavement or the traveled surface or to the line of the right-of-way, whichever is the lesser. Such crossings shall be made as nearly as practicable at an angle of 90° to the center line of the highway.
(3) In the case of facilities for motor vehicles, including parking and truck servicing areas, the top of the pipe shall be not less than three feet from the traveled surface and the ditch underneath, around and over the pipe shall be backfilled with well compacted material free from rocks or boulders.
(4) In the case of private driveways used only for residential purposes, the top of the pipe shall be not less than two feet six inches from the traveled surface and the trench shall be filled as set forth in subdivision (3) of this regulation.
(5) When a new road is constructed over a pipe line that is intended to be accepted by a town as a public highway, such pipe line shall meet the requirements of subdivision (2) above.
(6) When an existing public highway is widened, the casing shall be extended so that it meets the requirements of subdivision (2) above.
(7) A pipe line shall not be laid under the traveled paved portion of a public highway, except where it crosses, unless special permission of the commission is first obtained.