underground district heating pipeline system reparation and reconstruction on the street in the city old ones replacement with new

barrier building bury business canal city completion construction deep development dirt dirty distribution district ditch drainage energy engineering equipment excavating excavation excellence extracting fence field gas ground heating hole home hot industrial industry infrastructure installation insulated laying line long metal new old orange parallel pipe pipeline pipes piping power reconstruction repair reparation replace road round safety sand season sewer site soil steel street supply system tool town trench tube underground urban water work