Yes. You should call no matter how deep you are digging, since many cables and pipes lie at extremely shallow depths. Utah law defines “excavation” as “an operation in which earth, rock, or other material on or below the ground is moved or displaced by tools, equipment, explosives, or demolition.” The law specifies the requirement to provide notice for marking before excavating.
Blue Stakes of Utah 811 Notification Center operating hours are now 8 A.M. to 4 P.M., Monday through Friday, except for Holiday closures. Submitting an online locate request is available 24/7.