Okay, I See the Marks, Now What?
Once all of the marks are completed, you can start your digging. In Montana the tolerance distance is 18 inches on both sides of the mark. If you are unable to avoid the markings or need to be real close, remember that you can only dig within 18 inches of the mark by mechanical means. If you have to get closer than that you have to use a hand shovel or a vacuum excavator, and carefully locate the facility and ensure that you do not damage the utility. If you damage or even just nick or mar the facility, please notify the utility company so they may make any repairs that may be needed.