Never rely solely on utility maps
Utility maps are not updated often, and the markings may be off. The one-call center has the most current, most accurate information about buried utilities.
Contact your utility notification service
Call your one-call utility notification service before you dig, blast, bore, trench, drill, grade or excavate in any way so that underground utilities can be marked and you can work safely. The local one-call utility notification service will arrange for marking of underground power lines and other utilities so you can keep your distance. If you can white-line your proposed excavation route, locators can more easily mark the affected utilities.