Chapter 4
4.10 Marking Multiple Facilities in the Same Trench
Practice Statement:
Multiple facilities in the same trench are marked individually and with corridor markers.
Practice Description:
In general, the number of lines marked on the surface equals the number of lines buried below. In circumstances where the total number of lines buried in the same trench by a single facility owner/operator may not be readily known, a corridor marker is used. The corridor marker indicates the width of the facility. (See Appendix B, “Uniform Color Code and Marking Guidelines.”)20