UPDATE: Grinding on Somerset Avenue in Pittsfield has been postponed until tomorrow (Tuesday). We’re told the grinder is broken. Starting at 6AM Tuesday, parts of Somerset Avenue from Main Street to Hartland Avenue will be down to one lane. Drivers are being advised to expect delays and if possible, make alternate travel plans.In Waterville, the water district has ordered that Oak Street between Main and Taiconic Street be closed to traffic. They’re doing maintenance work on some valves in preparation for upcoming road re-construction in the area. Parts of that street could be closed for most of the day.