Anyone digging must contact OKIE811 to have facility operators locate and mark their underground lines.
Use paint, flags, stakes, whiskers or a combination to identify the operator’s facility(s) at or near the excavation site.
Marks in the appropriate color are approximately 12 to 18 inches long and one inch wide, spaced approximately four to five feet apart. When marking facilities, the operator considers the location, the land’s terrain, the type of excavation being done, and the method required to adequately mark the facility for the excavator.
The following marking examples illustrate how an operator may choose to mark their subsurface installations:
Single Marking Facility
Two Phase Primary
Three Phase Primary
High-Pressure Gas Main
Gas Main with Service T
Changes in direction and lateral connections are clearly indicated at the point where the change in direction or connection occurs; an arrow typically indicates the path of the facility.
Used for any locatable facility being carried inside conduits or ducts. The marks indicating the outer extremities denote the actual located edges of the facilities represented.
When there is “No Conflict” with the excavation, operators of a single type of facility mark the area “NO” followed by the appropriate company identifier in the matching APWA color code for the facility.