From the record
“The Udell Lookout Tower is a fire lookout tower located on Forest Road 5207 in the Manistee section of the Huron-Manistee National Forests, near Wellston, Michigan. It was placed on the National Register of Historic Places in 1996.”
Wikipedia article Udell Lookout Tower, CC BY-SA 4.0.
One of 19 National Register listings published here for Manistee County · listed in 1996 · category: Structure · built in 1936.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service