A portion of Main Street in Gainesville that had been closed for more than a month reopened Thursday, but another section of the street will likely remain closed for a few more weeks as workers continue to replace 100-year-old cast-iron water lines. Two sections of Main Street at the intersection with Jesse Jewell Parkway had been closed since the work began April 17. Gainesville Assistant City Manager Angela Sheppard said the portion of the street north of Jesse Jewell reopened Thursday.