Held Watershed Site D-1, located in Plymouth County, Iowa, is a critical water management structure designed by the USDA NRCS to serve various purposes including fire protection, stock, small fish pond, and flood risk reduction. Completed in 1979, this earth dam stands at 40 feet high with a length of 420 feet, providing a storage capacity of 101 acre-feet and covering a surface area of 4.8 acres. The dam is regulated by the Iowa DNR and is regularly inspected to ensure its operational integrity.

Situated along the TR-Floyd River, Held Watershed Site D-1 plays a crucial role in managing water resources in the region, with a low hazard potential and a moderate risk assessment. While the dam does not have a controlled spillway, it is equipped to handle emergency situations and is maintained to meet regulatory guidelines. The structure serves as a key component in mitigating potential flooding events and safeguarding the surrounding community, highlighting the importance of sustainable water management practices in the face of climate change challenges.

With its strategic location and purposeful design, Held Watershed Site D-1 stands as a testament to effective collaboration between local government agencies and the USDA NRCS in ensuring the long-term resilience of water resources in Iowa. As climate enthusiasts and water resource advocates continue to monitor and support such initiatives, this watershed site serves as a model for sustainable infrastructure development and proactive risk management in the face of evolving environmental conditions.