A rendering depicts the nearly 185,000-square-foot facility planned for a hillside in Greenwich Township, just across the Musconetcong River from Bloomsbury. D4 PropertiesWith only 800 residents, Bloomsbury is one of New Jersey’s tiniest and quietest towns. Tucked in the valleys of northwestern Hunterdon County, just south of Phillipsburg, the rural borough spans just under a square mile and traces its roots to colonial times.