Look for these signs
Located near roads, railways and along the pipeline right-of-way Marker for Pipeline Patrol Plane Pipeline Casing Vent Painted Metal or Plastic Post
Remember:
Warning signs, pilot patrol markers, casing vents and post are used to mark a pipeline vicinity. They are within tolerance zone of the pipeline. The depth of the facility will vary, depending on many different factors such as soil erosion, grading, landscaping, etc.
Tolerance Zone:
Tolerance zone is the approximate location of underground utility facilities or CATS facilities defined as a strip of land at least 3 feet wide, but not wider than the width of the under ground facility plus 1-1/2 feet on either side of such facility based upon the markings made by the owner or operator of the facility.
Color Code: for marking under ground utility lines:
