Lake Madigan, located in Solano County, California, is a vital water supply reservoir owned and regulated by the local government. Built in 1908, this earth dam stands at a height of 89 feet, with a storage capacity of 1175 acre-feet. The dam serves the primary purpose of water supply for the city of Greenville, drawing from the waters of Wild Horse Creek.

With a surface area of 72 acres and a drainage area of 1.5 square miles, Lake Madigan plays a crucial role in ensuring water security for the region. Despite its age, the dam has been assessed as satisfactory in condition, with a high hazard potential. Regular inspections are conducted, with the last assessment taking place in October 2020. For water resource and climate enthusiasts, Lake Madigan is a fascinating example of sustainable water management in action, highlighting the importance of proper regulation and maintenance of critical infrastructure in the face of changing environmental conditions.