Pfieffer Dam, located in Hawleyville, Iowa, along the TR-Nodaway River, was completed in 1961 by the USDA NRCS. This earth dam stands at a height of 30 feet and stretches 350 feet in length, with a capacity of 87 acre-feet. Its primary purpose is for fire protection and as a stock or small fish pond. The dam is state-regulated by the Iowa DNR and is inspected, permitted, and enforced by the state agencies.

With a low hazard potential and a moderate risk assessment rating, Pfieffer Dam plays a crucial role in managing water resources in Taylor County, Iowa. The dam's design by the Natural Resources Conservation Service ensures its structural integrity, while its location on the Nodaway River contributes to the local ecosystem's health. Despite not being rated for its condition, the dam continues to serve its purposes effectively, with a surface area of 4.2 acres and a drainage area of 0.49 square miles.

For water resource and climate enthusiasts, Pfieffer Dam serves as a fascinating example of sustainable water management practices in the Midwest. Its low hazard potential and moderate risk assessment highlight the importance of proper dam maintenance and regulation to ensure the safety and efficiency of water infrastructure. With its primary focus on fire protection and supporting local wildlife, Pfieffer Dam stands as a testament to the collaboration between private owners, state agencies, and federal designers in safeguarding water resources for present and future generations.