According to the Sleeping Bear Dunes National Lakeshore (excerpt from George Weeks’ Sleeping Bear: Yesterday & Today):
The D. H. Day farm, comprised of 400 acres, was also known as “Oswegatchi” after the New York community where his father was born and the Oswegatchi River where D. H. Day played as a boy. Day grew hay and corn to feed his 400 hogs and prize herd of 200 Holsteins. The farm is just south of Glen Haven and has a large white barn and several out-buildings that stand as a landmark of the agricultural heritage of this area. The buildings were built in the 1880s and 1890s.