Flint water service line manager gets contract extension, says work could be complete by early summer Updated 10:00 AM; Today 10:00 AM Crews dig up and replace lead service lines April 18 on the 2300 block of Calumet Street on FlintÕs east side. Mayor Karen Weaver said Friday that she is Òputting a pauseÓ on the use of hydro-excavation to identify lead pipes, claiming it is unreliable. (Jake May | MLive.com)Jake May Facebook Share FLINT, MI -- The company that manages Flint’s program for replacing lead and galvanized water service lines is back on the job and predicting the effort that started five years ago could be completed by early summer.