Hit your electrical supply store and buy marking flags in the appropriate colors, if they don’t put them in themselves. Water and gas (blue/yellow) probably come from the road and electric and communications (red/orange) in the back. This time of year the spray paint could be gone a week later when you mow the 1st time. Especially if you fertilized already.they require the utilities to be marked so I want to get that done now so I don't need utilities marked yet again!
With the shuffling of resources due to current events they will probably take more than one mowing to come back and start working.