Mc Clain Dam, located in Guernsey, Iowa, serves multiple purposes including fire protection, stock, and small fish pond. Built in 1969 by USDA NRCS, this private dam stands at a height of 26 feet and spans 410 feet in length. With a storage capacity of 44 acre-feet and a surface area of 4.8 acres, Mc Clain Dam plays a crucial role in managing water resources in the area.

The dam is regulated by the Iowa Department of Natural Resources, ensuring that it meets safety standards and undergoes regular inspections. Despite being rated as having low hazard potential and a moderate risk level, Mc Clain Dam has not been given a condition assessment. The dam's spillway is uncontrolled, and it is designed to handle moderate discharge levels.

Water resource and climate enthusiasts will be intrigued by Mc Clain Dam's location on the TR-North Fork English River and its role in managing water resources for the surrounding area. With its diverse range of uses and history dating back to the late 1960s, this private dam is an essential piece of infrastructure for the community of Guernsey and Poweshiek County, Iowa.