Construction crews are excavating dirt for a regional retention pond near the corner 23rd Street Southwest and South Taft Avenue, in anticipation of the new Aspen Knolls subdivision.

The Monroe County/Toledo North KOA is replacing its pond with a new water recreation area after multiple drownings.

Turtles in a popular City of Fairfax pond will be safely relocated in the next few days and weeks, ahead of a monthslong dredging and construction project at Ashby Pond.

Erin Clark/Globe Staff The main beach at Walden Pond in Concord will be closed this summer during construction of a new bathhouse at the popular swimming area, state officials said.