Perrin Dam, located in Grand River, Iowa, is a privately owned earth dam completed in 1999 by the NRCS. This dam, standing at a height of 21 feet and a length of 383 feet, serves the primary purpose of water storage with a capacity of 54 acre-feet. The dam regulates the flow of Tr- West Branch Creek, providing vital water resources for the surrounding area.

Despite its low hazard potential and moderate risk assessment, Perrin Dam is regulated, permitted, inspected, and enforced by the Iowa DNR. The dam's spillway type is uncontrolled, with a width of 1 foot, and it has a surface area of 5.6 acres and a drainage area of 0.14 square miles. The dam's normal storage capacity is 26 acre-feet, ensuring a reliable water supply for the region.

Water resource and climate enthusiasts will appreciate Perrin Dam's role in water management and conservation in Adair County, Iowa. With its strategic location and efficient design, the dam plays a crucial role in maintaining water levels and protecting against potential risks. As a significant part of the local infrastructure, Perrin Dam stands as a testament to the importance of sustainable water resource management in the face of changing climate conditions.