Navarino Marsh, also known as the 80 Ac Flowage, is a state-owned water resource located in Shawano, Wisconsin. This 80-acre flowage is regulated by the Wisconsin Department of Natural Resources and boasts a controlled spillway with a width of 100 feet. With a maximum discharge capacity of 110 cubic feet per second, Navarino Marsh serves as a vital resource for managing water levels and supporting the surrounding ecosystem.

The dam at Navarino Marsh stands at a height of 7 feet and has a storage capacity of 400 acre-feet. The flowage covers an area of 175 acres and has a drainage area of 1.5 square miles. Although classified as having a low hazard potential, the risk assessment for this water resource indicates a very high risk level. Despite not having a current condition rating, Navarino Marsh plays a crucial role in water management and flood control in the region.

Located in the Detroit District, Navarino Marsh is situated in a picturesque setting in the city of Shiocton. While the last inspection of the flowage took place in July 2011, its emergency action plan status and risk management measures are not currently updated. As a significant water resource in Wisconsin, Navarino Marsh provides valuable insights and opportunities for water resource and climate enthusiasts interested in sustainable water management practices and the impact of climate change on freshwater ecosystems.