Croy Subwatershed Site 23700, located in Monona, Iowa, is a vital water resource managed by the local government and regulated by the Iowa Department of Natural Resources. The site, designed by USDA NRCS, serves multiple purposes such as fire protection, livestock watering, and small fish pond creation, as well as aiding in flood risk reduction. Completed in 1951, this earth dam stands at a height of 37 feet and has a storage capacity of 22 acre-feet.

With a low hazard potential and a moderate risk assessment rating, Croy Subwatershed Site 23700 plays a crucial role in managing water resources in the area. Despite not having a current condition assessment, the site's structural integrity is maintained by regular state inspections and enforcement. The dam's uncontrolled spillway and soil foundation contribute to its reliability in safeguarding against flooding and ensuring water availability for various purposes in the region.

Croy Subwatershed Site 23700, situated along the TR-Maple River, is a key component of the local water infrastructure, providing essential services while also supporting environmental sustainability. As a focal point for water management and conservation efforts, the site exemplifies the importance of proactive measures in preserving water resources and adapting to the challenges posed by climate change.