Mcgrew Reservoir, located in Lyon County, Kansas, is a private water resource managed for recreation purposes. This Earth dam, completed in 2004, stands at a height of 24 feet and spans a length of 1050 feet, providing a storage capacity of 151.39 acre-feet. With a normal storage level of 57.29 acre-feet, the reservoir covers a surface area of 9.96 acres and drains an area of 0.53 square miles.

Despite its low hazard potential and moderate risk assessment, Mcgrew Reservoir has not undergone a formal condition assessment and is not currently regulated or inspected by state agencies. The spillway, with a width of 80 feet, is uncontrolled, and there are no outlet gates associated with the dam. While the reservoir does not have locks, it boasts a maximum discharge capacity of 1032 cubic feet per second, ensuring proper water management and flood control for the surrounding area. Overall, Mcgrew Reservoir presents an opportunity for water and climate enthusiasts to explore a well-maintained recreational resource nestled in the heart of Kansas.