Allen Lake, located in Stafford, Kansas, is a private water resource managed by the Kansas City District of the US Army Corps of Engineers. Built in 1950, this buttress dam stands at a height of 6 feet and has a hydraulic height of 9 feet, offering a maximum storage capacity of 64.5 acre-feet and a normal storage of 3.4 acre-feet. The reservoir covers a surface area of 6.79 acres and drains an area of 96.81 square miles, serving as a vital water source for the surrounding area.

Situated on the North Fork Ninnescah River, Allen Lake boasts a low hazard potential and has not been rated for its condition assessment. While it does not have a designated primary purpose or spillway type, the dam is crucial for flood control and water supply management in the region. Despite not being under state regulation, the lake plays a significant role in maintaining water levels and supporting local ecosystems. With its serene waters and scenic surroundings, Allen Lake is a haven for water resource and climate enthusiasts alike, offering a glimpse into the sustainable management of vital water sources in Kansas.