Vernon Spring Dam, located in Howard County, Iowa, was completed in 1857 and serves as a vital water resource structure on the Turkey River. With a height of 8 feet and a length of 150 feet, the dam has a storage capacity of 110 acre-feet and a drainage area of 73 square miles. The spillway type is controlled, and despite its low hazard potential, the dam is classified as having a very high risk due to its age and condition assessment being not rated.

Owned by the local government and regulated by the Iowa Department of Natural Resources, Vernon Spring Dam plays a crucial role in managing water flow and storage in the area. While its primary purpose is categorized as "Other," the dam serves various purposes related to water resource management. Although not currently rated for its condition, the dam is subject to regular state inspections, with enforcement and permitting also carried out by state agencies.

For water resource and climate enthusiasts, Vernon Spring Dam presents an intriguing case study in the management of aging infrastructure and the challenges of balancing water storage and flood control. With a rich history dating back to the mid-19th century, the dam stands as a testament to the importance of maintaining and upgrading critical water resource structures to adapt to changing environmental conditions and ensure long-term sustainability.