It's prob water and very, very likely only paid to restore the trench (no milling will be done in this case). Gas is usually a thinner trench (more shallow depth requirements) and sewer usually requires full width restoration. They will do cut backs and hope for temps above 50 to wrap it up before asphalt plants close for the season.

Anyone see any markings on the barrels as to who did the work? PCI? Nello? Meco? CCI?