Bear Creek Watershed Site 21, located in Quandahl, Iowa, is a vital flood risk reduction structure designed by USDA NRCS and completed in 2011. This Earth-type dam stands at a height of 37 feet and spans 275 feet, providing storage capacity of 86 acre-feet to mitigate flooding along the Tributary to North Bear Creek. With a low hazard potential and not yet rated condition assessment, this site serves as a crucial asset in the state's water resource management efforts.

Operated by the local government with oversight from the Iowa DNR, Bear Creek Watershed Site 21 plays a significant role in protecting the surrounding Winneshiek County area. With a drainage area of 0.61 square miles and a normal storage capacity of 27 acre-feet, this structure contributes to the overall resilience of the region against potential water-related hazards. Despite its importance, the dam has not been subject to recent inspections or assessments, highlighting the need for continued monitoring and maintenance to ensure its effectiveness in flood control.

As part of a broader network of flood risk reduction infrastructure in the St. Paul District, Bear Creek Watershed Site 21 stands as a testament to collaborative efforts between federal, state, and local agencies. With its strategic location and design, this site exemplifies the intersection of engineering innovation and environmental stewardship, making it a beacon for water resource and climate enthusiasts alike.