Henderson is a crucial dam located in Ione, California, along the Jackass Creek. Built in 1923, this earth dam stands at a height of 56 feet and serves primarily as a water supply system, with a storage capacity of 500 acre-feet. The dam also plays a role in flood risk reduction and irrigation for the surrounding area.

Managed by the California Department of Water Resources (DWR), Safety of Dams division, Henderson is subject to state regulation, permitting, inspection, and enforcement to ensure its safe operation. Despite being classified as having a high hazard potential, the dam's condition was assessed as fair in 2012. Regular inspections are conducted, with the last one taking place in October 2020.

With its historical significance and essential role in water management, Henderson dam continues to be a vital infrastructure for the community and the environment. As climate change impacts water resources, the maintenance and monitoring of dams like Henderson are crucial to ensure the safety and sustainability of water supply systems in California's ever-changing landscape.