Upper Beaver Subwatershed Site 20-1 is a vital water resource located in Monona, Iowa, along the TR-Beaver Creek. Owned and regulated by the local government, this site serves multiple purposes including fire protection, stock, and small fish pond, as well as flood risk reduction. Built in 1967, the earth dam stands at a height of 51 feet with a length of 297 feet, providing a storage capacity of 68 acre-feet and covering a surface area of 3.1 acres.

Managed by the USDA NRCS, this site is designed to withstand low hazard potential with a moderate risk assessment rating. While the condition assessment is not rated, the dam has state jurisdiction and is subject to state permitting, inspection, and enforcement by the Iowa DNR. Despite not having an emergency action plan in place, the dam meets guidelines for risk management measures and is not under the jurisdiction of the US Army Corps of Engineers.

With its strategic location and crucial role in water resource management, Upper Beaver Subwatershed Site 20-1 stands as a key asset in safeguarding the surrounding area from potential flooding and ensuring adequate water supply for fire protection and agricultural needs. As a climate enthusiast, understanding the design, purpose, and regulatory framework of this site provides valuable insights into the sustainable management of water resources in the region.