Always take job site photos of locate markings before excavating and after a near hit or hit. Keep good records of incident for defending your position before the Damage Prevention Committee (DPC).
Call 911 first, then 811, and then the facility owner. The excavator (contractor) must make these calls regardless if a facility owner tells you they will call or they did call 911. 911 and 811 create a record of your calls for defense purposes.