Call before you dig - It's the LAW.
Remember: Call the OUNC at least two business days before you dig
COLOR CODE
 

Underground facilities shall be marked in accordance with the following designated color code:

RED
Electric power lines, cables or conduit, and lighting cables.
YELLOW
Gas, oil, steam, petroleum, or other hazardous liquid or gaseous materials.
ORANGE
Communications, cable TV, alarm or signal lines, cables or conduits.
BLUE
Water, irrigation, and slurry lines.
GREEN
Sewers, drainage facilities or other drain lines.
WHITE
Pre-marking of the outer limits of the proposed excavation or marking the centerline and width of proposed lineal installations of buried facilities.
PINK
Temporary Survey Markings.
PURPLE
Slurry and reclaimed.

Permanently Marking Underground Facilities

The following recommendations shall be followed when permanently marking underground facilities.

  1. Markers must be clearly visible.
  2. Marker material shall be durable in nature. (Treated Wood, Metallic, UV Resistant Plastics, etc.)
  3. Mark culverts if not readily visible. Mark both ends of all non-visible underground facilities.
  4. Identify type of underground facility if not recognizable from the surface.
  5. It is also recommended that the OUNC Call Center number (1-800-332-2344) appear on the marker, if the marker is of sufficient size.

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