Twin Ponies Watershed Site 17a is a vital water resource located in Pottawattamie, Iowa, specifically in the city of Council Bluffs. Managed by the local government, this site is regulated by the Iowa Department of Natural Resources and has been designed by the USDA NRCS. Completed in 1998, the primary purpose of this Earth dam structure is for fire protection, stock, and small fish pond use, as well as flood risk reduction.

With a dam height of 54 feet and a storage capacity of 476 acre-feet, Twin Ponies Watershed Site 17a covers a surface area of 23.4 acres and serves a drainage area of 2.12 square miles. Although the hazard potential is classified as low and the condition assessment is satisfactory, the risk assessment indicates a moderate level of risk with a score of 3. Inspected every five years, this site has not required any modifications since its last assessment in 2010, maintaining its functionality and safety for the surrounding community.

The presence of Twin Ponies Watershed Site 17a contributes to water management efforts in the region, providing essential resources for fire protection, agriculture, and environmental conservation. Climate and water resource enthusiasts will appreciate the sustainable design and management practices implemented at this site, ensuring its continued effectiveness in mitigating flood risks and supporting local water needs.