Vesper, located in Wood County, Wisconsin, is a privately owned dam on Hemlock Creek, with a primary purpose of recreation. Built in 1944, this concrete gravity dam stands at a height of 13 feet and has a maximum storage capacity of 75 acre-feet. With a surface area of 11 acres and a drainage area of 41.2 square miles, Vesper serves as a significant water resource in the region.

Despite being last inspected in 2009, Vesper is classified as having a significant hazard potential and a moderate risk level. The dam's spillway, with a width of 150 feet, is uncontrolled, and its maximum discharge capacity is reported to be 2070 cubic feet per second. Although the condition of Vesper is currently not rated, it is subject to state regulation, inspection, and enforcement, ensuring its continued safety and compliance with standards.

For water resource and climate enthusiasts, Vesper presents an intriguing case study of a historic dam that continues to provide recreational opportunities while facing potential risks and regulatory oversight. Its location on Hemlock Creek, in the Detroit District, adds to its significance as a water management structure in the region. As efforts to assess and manage the risks associated with dams like Vesper continue, understanding and monitoring its condition and performance are essential for ensuring the safety and sustainability of this important water resource.