What is required to identify the location of underground service laterals buried 18 inches or more below grade?

Identifying the location of underground service laterals is crucial for safety during excavation and construction activities. A warning ribbon, typically used in utility work, serves as a visual indication of buried utilities. When placed above the utility line, usually at a depth of 12 inches or more, the warning ribbon helps alert excavators to the presence of underground services.

This practice is particularly pertinent for lines buried 18 inches or more below grade, as those depths require clear marking to prevent accidental damage during digging. In areas where excavation occurs, having a warning ribbon can significantly reduce the risk of hitting a buried utility, thereby promoting safety and compliance with local codes.

While a warning sign, protective casing, and marking paint play roles in utility identification and safety, they do not specifically function as an immediate visual warning above the buried utilities that directly indicates their presence before excavation begins. A warning sign may provide general information about the area, protective casing can safeguard against external damage, and marking paint can indicate the location of utilities but may not provide a physical barrier or visual cue at the necessary depth. Hence, the use of a warning ribbon is the most effective method for identifying the location of buried service laterals.