Decoto Reservoir, located in Fremont, California, is a vital offstream water supply structure primarily owned by the local government. Completed in 1966, this Earth type dam stands at a height of 33 feet, with a hydraulic height of 30.5 feet and a length of 1360 feet. It has a storage capacity of 46 acre-feet, serving the purposes of irrigation and water supply for the region.

Despite its satisfactory condition assessment as of September 2017, Decoto Reservoir is classified as having a high hazard potential. Regular inspections are conducted, with the last one taking place in February 2021. The dam is regulated, permitted, and inspected by the California Department of Water Resources' Safety of Dams program, ensuring its compliance with state safety standards. In the event of an emergency, the reservoir's Emergency Action Plan is expected to be readily available, although details on its preparation and adherence to guidelines are currently unspecified.

For water resource and climate enthusiasts, Decoto Reservoir offers a fascinating case study in water management and infrastructure. With its location in Alameda County, the reservoir plays a crucial role in supporting local agricultural activities and providing a reliable water supply to the surrounding communities. As efforts continue to maintain its structural integrity and emergency preparedness, Decoto Reservoir stands as a testament to the ongoing importance of sustainable water resource management in the face of changing climate conditions.