What does a blue mark out line mean?

What does a blue mark out line mean?

• A. Electric
• B. Water
• C. Gas/Steam
• D. Proposed Excavation

Answer: (B)

Blue marks are part of the universal color code for underground utilities. Each color flags a different type of buried line, so workers know what’s below without guessing. Blue specifically indicates water lines, including potable water mains or service lines. So seeing a blue mark-out line means there’s a water pipe in that area and digging should be planned with that in mind to avoid damaging the line. Other colors correspond to other utilities (electric is red, gas/steam is yellow, etc.), which helps prevent accidental strikes during digging or excavation. If there’s any doubt, verify with the local utility and follow the required notice procedures before proceeding.

Blue marks are part of the universal color code for underground utilities. Each color flags a different type of buried line, so workers know what’s below without guessing. Blue specifically indicates water lines, including potable water mains or service lines. So seeing a blue mark-out line means there’s a water pipe in that area and digging should be planned with that in mind to avoid damaging the line. Other colors correspond to other utilities (electric is red, gas/steam is yellow, etc.), which helps prevent accidental strikes during digging or excavation. If there’s any doubt, verify with the local utility and follow the required notice procedures before proceeding.