General Order 128
Requirements for Supply Systems
Manhole, handhole and subsurface equipment enclosure, locations shall be such that the opening will provide safe access and, where practicable, shall be so located that future maintenance work will cause minimum interference with the normal flow of vehicular traffic.
In no case may the nearest edge of the opening at the surface be less than 3 feet from any rail of any railroad or streetcar track. (Also see Rule 31.5-D, Appendix B, Fig. 9, and Appendix C, Fig. 2.)
This rule does not apply where satisfactory proof is submitted to the Commission that it is impracticable or physically impossible to comply with this rule within the space or location so designated by proper authorities.