Shade Gap Feed and Flour Mill, also known as C.J. Hess Mill, is a historic grist mill located at Dublin Township in Huntingdon County, Pennsylvania. It was built in 1846, and is a three-story frame building, measuring , with a one-story frame office attached. It sits on a rubble stone foundation and has clapboard siding. The mill ceased operation in 1973–74, but continues as a livestock feed mill. It was listed on the National Register of Historic Places in 1990. References External links millpictures.com Grinding mills on the National Register of Historic Places in Pennsylvania Industrial buildings completed in 1846 Buildings and structures in Huntingdon County, Pennsylvania Grinding mills in Pennsylvania National Register of Historic Places in Huntingdon County, Pennsylvania 1846 establishments in Pennsylvania