Woods Hollow Subwatershed Site M-10450 is a dam located in Monona, Iowa, specifically in the city of Little Sioux. The dam, constructed in 1960 by the USDA NRCS, serves multiple purposes including fire protection, stock, small fish pond, and flood risk reduction. With a height of 25 feet and a storage capacity of 50 acre-feet, this earth dam plays a crucial role in managing water resources in the area.

The dam is regulated by the Iowa DNR and is regularly inspected to ensure its safety and effectiveness. With a low hazard potential and a moderate risk assessment rating, the Woods Hollow Subwatershed Site M-10450 is a vital infrastructure for the local community. Despite not being rated for its condition assessment, the dam continues to serve its purpose in water management and conservation efforts in the region.

Located along the TR- Little Sioux River, this dam contributes to the overall health of the watershed by providing flood risk reduction and water storage capabilities. With its strategic location and design, the Woods Hollow Subwatershed Site M-10450 is an important site for water resource and climate enthusiasts to study and appreciate in the context of sustainable water management practices.