Located in Monona, Iowa, the West Beaver Subwatershed Sta 33+30 is a local government-owned earth dam completed in 1961 by the USDA NRCS. This dam serves multiple purposes including fire protection, stock, small fish pond, and flood risk reduction for the Little Sioux River. With a height of 44 feet and a storage capacity of 80 acre-feet, this dam covers a drainage area of 0.28 square miles and spans 266 feet in length. Despite its low hazard potential, the dam's risk assessment is classified as moderate (3), indicating a need for ongoing monitoring and maintenance.

The West Beaver Subwatershed Sta 33+30 is regulated by the Iowa DNR and falls under the jurisdiction of the state, with permitting, inspection, and enforcement carried out by the relevant state agencies. The dam's primary purpose is to provide essential water resources for the surrounding area, while also contributing to flood risk reduction efforts. As part of the Rock Island District, this dam plays a crucial role in managing water flow along the TR-Beaver Creek, ensuring the safety and resilience of the local community in the face of changing climate patterns and extreme weather events.

Despite its relatively small surface area of 5.4 acres, the West Beaver Subwatershed Sta 33+30 serves as a vital infrastructure for water management in Monona, Iowa. With a focus on fire protection, livestock, and fish pond maintenance, this dam contributes to the sustainability and resilience of the local ecosystem. As water resource and climate enthusiasts, understanding the significance of structures like the West Beaver Subwatershed Sta 33+30 is key to promoting effective water management practices and mitigating the impacts of climate change on our environment.