Located in the heart of the Gant Creek Watershed in Sioux City, Iowa, Site D-1 is a vital water resource managed by the local government with oversight from the Iowa Department of Natural Resources. This Earth dam, constructed in 1967 by the USDA NRCS, serves a variety of purposes including fire protection, stock, and small fish pond management, as well as flood risk reduction. With a dam height of 26 feet and a storage capacity of 25 acre-feet, this site plays a crucial role in water management and conservation efforts in the region.

Despite its low hazard potential and moderate risk assessment rating, Site D-1 has not been rated for its condition assessment. However, its primary purpose and well-maintained infrastructure make it a valuable asset for the community. With a drainage area of 0.14 square miles and a storage capacity of 25 acre-feet, this site provides essential water storage and flood protection services for the surrounding area. Its strategic location along the TR-Big Sioux River further enhances its significance in regional water resource management.

As a key component of the Gant Creek Watershed, Site D-1 offers a glimpse into the intricate network of water management systems in the region. With its strategic design, purposeful construction, and ongoing regulatory oversight, this site stands as a testament to the importance of sustainable water resource management in mitigating flood risks, supporting local ecosystems, and ensuring water security for future generations.