Pennsylvania One Call System is an organization serving the locality of Pennsylvania, which seeks to increase the quality of the underground constructions and each of the procedures involved, starting with the respective excavations. We want to avoid that new constructions interfere in some way with previous or simultaneous ones and that this may generate an imbalance in the stability of some of them that threatens the security of those who coexist within them. For this reason we are available every day to provide the information that any member of the locality needs before carrying out these works.