Fort River principals to bid adieu Diane Chamberlain, departing principal at Fort River, stands in a classroom that used to be one half of a quad of classrooms last summer, as part of work done in advance of students coming back to the building last fall. —CAROL LOLLIS Published: 1/31/2021 10:38:36 AM AMHERST — Fort River School’s principal for five years, on an interim and then permanent basis, will be leaving for a position at a school in Thailand at the end of the school year. In a letter to families sent Thursday, both Principal Diane Chamberlain and Assistant Principal Renee Greenfield announced their departures effective July 1.