The Tolerance Zone

After filing a locate request with Montana 811, make sure to wait two full business days to get your underground utilities marked before you break ground. After the standard waiting period has passed, remember to check the status of your locate ticket by going to and clicking on the white button named “Search and Status of a Montana Locate Ticket.” If all affected facility operators have responded, what’s next? You should dig using hand tools, vacuum excavation, or a non-invasive excavation method within the “tolerance zone”, the 18” area on either side of an underground utility plus the width of the utility itself.

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