Little Yellow 12 is a gravity dam located on the East Branch Little Yellow River in Necedah, Wisconsin. Built in 1935 for irrigation purposes, the dam stands at 8 feet tall and has a storage capacity of 140 acre-feet. The dam also serves for recreation and water supply, with a normal storage of 100 acre-feet and a maximum discharge of 497 cubic feet per second.

Despite its low hazard potential, Little Yellow 12 is considered to have a very high risk due to its age and condition assessment being not rated. The dam has not been inspected in recent years, with the last inspection date unknown. While the emergency action plan status and risk management measures are unclear, the dam's location in a high-risk area underscores the importance of regular monitoring and maintenance to ensure public safety and water resource sustainability in the region.