 The Pithole Stone Arch Bridge was listed on the National Register of Historic Places in 1988.According to the United States Census Bureau, the township has a total area of 38.5 square miles (99.6 km²), of which, 37.4 square miles (96.8 km²) of it is land and 1.1 square miles (2.8 km²) of it (2.78%) is water.As of the census of 2000, there were 543 people, 241 households, and 162 families residing in the township.