Grandad, what do the colored flags and spray paint on lawns and streets mean?
Well, I knew yellow was for gas and after that I wasn’t sure. They all mean something is buried there and don’t dig in that spot unless you know what you’re doing.
Here’s a key to the flags’ colors:
RED – Electric Power Lines, Cables, Conduit and Lighting Cables
YELLOW – Gas, Oil, Steam Petroleum or Gaseous Materials
ORANGE – Communication, Cable TV, Alarm or Signal Lines, Cables or Conduit
BLUE – Water, Irrigation and Slurry Lines
GREEN – Sewers and Drain Lines
PINK – Temporary Survey Markings
WHITE – Proposed Excavation
https://www.cedarburglightandwater.org/what-do-colored-flags-ground-mean#