400 N Beacon St
Watertown, MA 02472
Office For Sale · Office Property For Sale · 21,106 SF

Building 97 was constructed in 1920 to house and repair the Arsenal’s fleet of locomotives, switch cars and cranes, which moved freight and equipment around the grounds over seven-and-a-half miles of railroad tracks. In 1959, Building 97 was transformed into a materials testing laboratory and equipment facility supporting the Horace Hardy Lester Nuclear Reactor.

Building 97 was connected to the reactor through a corridor and had labs, decontamination showers, and equipment supporting ongoing experiments involving the reactor. In 1970, the reactor was shut down, but Building 97 continued to function as an active laboratory, utilizing a portable neutron radiography machine located inside the reactor containment building.