Line markers must include which information to be useful?

• A. The Operator's Name
• B. The Telephone Number
• C. The Operator's Name and the Telephone Number
• D. The Facility Address

Answer: (C)

Line markers are meant to quickly connect a buried facility with the party responsible for it, so readers can reach the right person and get information or updates as needed. The best information to include is both the operator’s name and a telephone number, because that combination lets someone identify who owns the line and contact that specific party directly for verification, questions, or issues. A name alone can leave uncertainty about who to call, and a phone number alone may not clearly indicate which operator is involved. The facility address is not as helpful for immediate contact and isn’t as critical for directing the reader to the right person.