The Nichols Satinet Mill Site, also known as Site No. 97-14, is an historic industrial archeological site in Newtown, Connecticut. It was listed on the National Register of Historic Places in 1996. It is also known as the Orchard Hill Mill Site and is the mill within the Orchard Hill Nature Center. The site was listed on the National Register more than a decade after local residents created the nature center. The site is owned by the town of Newtown. Listing was believed to increase the chance that it could become the focus of a dig by state archeologists. The site was owned by the Nichols family in the 1760s. The property includes two old dam and mill sites. The second-built dam on the site is a -high, -long structure made of granite blocks. The property was studied in 1983 by George W. Adams, with the assistance of Albert S. Knapp, in a study that led to creation of the nature center, consisting of about . See also National Register of Historic Places listings in Fairfield County, Connecticut References National Register of Historic Places in Fairfield County, Connecticut Archaeological sites in Fairfield County, Connecticut Newtown, Connecticut Archaeological sites on the National Register of Historic Places in Connecticut