The Roslyn Landmark Society is honored to enter into a partnership with The Robert David Lion Gardiner Foundation for a $100,000 grant for the Roslyn Grist Mill Project.  This grant will help fund the construction of a new concrete foundation with stone veneer utilizing the existing foundation stones.  Since the grant award in October 2019 the preparations for the new foundation began in November 2019 with six footings constructed for lifting the building, a ramp to bring in heavy machinery and a concrete berm to manage the tidal water from Hempstead Harbor.  The building is expected to be lifted to street level in the winter of 2020 and construction on the new foundation will begin.

The Roslyn Grist Mill is a rare surviving Dutch-framed watermill built between 1715 and 1741 purposely built for industrial use rather than farming. It operated as a working water mill for over 150 years. On April 24, 1790, the owner of the grist mill Hendrick Onderdonk was visited by President George Washington in his Roslyn residence adjoining the grist mill. Washington referred to the grist mill in his diary. From 1920 to 1974, the grist mill building served as a tea house and was a tourist attraction to the village. The building was placed on the National Historic Register of Historic Places in 1986.