41591 Cross Island Rd., Clayton, New York. County/parish: Jefferson.
Added to the National Register of Historic Places August 14, 2012. NRIS 12000509.
1 contributing building.
Grindstone Island Upper Schoolhouse is a historic one-room school building located on Grindstone Island, Clayton, Jefferson County, New York. It was built in 1885, and is a 1 1/2-story, three bay by one bay, frame building on a granite foundation. The building includes a vestibule and small teachers apartment. Also on the property is a contributing well pump. It operated until 1989, making it the last one-room school in operation in New York State.: 5–6
It was added to the National Register of Historic Places in 2012.
(read more...)National Park Service documentation: https://catalog.archives.gov/id/75318239