EAST BOOTHBAY — Construction is underway on a 32-bed dorm for students and scientists visiting the East Boothbay campus of the Bigelow Laboratory for Ocean Sciences.

A $3.1 million grant from the Harold Alfond Foundation was matched by an anonymous donor to fund construction of the 15,000-square-foot building.

Graham Shimmield, executive director, said the two-story building will help the Bigelow Lab expand educational programs for students and professionals.

Two adjacent wings will contain studio apartments with kitchen, bedroom and bath to accommodate and a two-bedroom apartment to accommodate additional guests.