Originally Posted by joed
Sounds like you are having some excavation done and a locate was done. Those flags are the location of a buried cable that needs to NOT be dug up during the excavation.
OR your neighbors are having some work done. If all the marking is in your yard and you're NOT having any work done... you need to talk to your neighbors. Someone is having some work done and their yard is not marked!
(which would stink if some sub-contractor shows up and starts digging toward your house to install a new sewer line that you don't need! )