Dwyer is a private earth dam located in Jerauld, South Dakota, with a primary purpose of fire protection, stock, or small fish pond. Completed in 1966, this dam has a height of 33 feet and a length of 288 feet, providing a storage capacity of 80 acre-feet. It is situated on Tr-Firesteel Creek and falls under the jurisdiction of the USDA NRCS. The dam's hazard potential is classified as low, with a moderate risk assessment score of 3.

Despite its relatively low hazard potential, Dwyer plays a crucial role in providing essential water resources for fire protection and livestock usage in the surrounding area. The dam's location within the St. Paul District highlights its significance in managing water resources and protecting against potential risks. With a history dating back to the 1960s, Dwyer continues to serve its intended purposes efficiently, contributing to the overall water management efforts in South Dakota.

As a part of the larger ecosystem, Dwyer stands as a testament to the collaborative efforts between private owners and federal agencies like the USDA NRCS in safeguarding water resources and mitigating potential hazards. Its strategic placement on Tr-Firesteel Creek ensures a reliable supply of water for various uses, highlighting the importance of such structures in maintaining a sustainable environment. With a focus on fire protection and supporting local agriculture, Dwyer exemplifies the intersection of water resource management and climate resilience in South Dakota.