Your smooth drive down Michigan Street in Sturgeon Bay may be interrupted again now that the city suffered a water main break.  City Engineer Chad Shefchik announced Thursday that all traffic on the eastbound lane of Michigan Street between 10th Avenue and 12th Avenue is closed until further notice.  The water main break caused significant damage to the southern portion of Michigan Street that was completed last month.  Sturgeon Bay Utilities' annual lead detection survey was completed on the east of the City as the Michigan Street project was wrapping up and did not detect any concerns.  A contractor has been scheduled by Sturgeon Bay Utilities to begin repairs Friday morning.