Published April 08. 2021 7:32PM | Updated April 08. 2021 10:06PM Norwich — Norwich Public Utilities will begin a monthlong project Monday to replace several hundred feet of cast iron piping and four service lines on Main Street through Franklin Square to Bath Street. The construction will take place between 7 a.m. and 4 p.m. Monday through Friday and likely will cause traffic disruptions. NPU has scheduled the work to take place ahead of the plan by the Norwich Public Works Department to redesign the Franklin Square intersection by installing a roundabout. That work is expected to begin in May and continue or much of the summer.