Middle Appleton is a privately owned hydroelectric dam located on the Fox River in Appleton, Wisconsin. Built in 1930, this gravity dam stands at a height of 11 feet and has a hydraulic height of 10.5 feet. With a storage capacity of 195 acre-feet and a surface area of 36 acres, Middle Appleton plays a crucial role in generating hydroelectric power for the region.

Managed by the Federal Energy Regulatory Commission, Middle Appleton has a controlled spillway with a width of 300 feet and 16 Tainter (radial) outlet gates. Despite its low hazard potential, the dam is considered to have a very high risk level due to various factors. While the condition assessment is not available, the dam undergoes inspections every 3 years, with the last one conducted in August 2018. Emergency action plans are in place, with the last revision made in December 2019.

Water resource and climate enthusiasts will be intrigued by Middle Appleton's role in harnessing hydropower along the Fox River. Its historical significance, engineering design, and risk management measures provide valuable insights into the intersection of water infrastructure and environmental stewardship in the region. The dam's location in Outagamie County, Wisconsin, underlines its importance in maintaining water resources while balancing energy needs and environmental protection.