The Mokelumne Hill reservoir was built by 1854 and served the town until 1973 when the waters of the Mokelumne Hill canal were replaced with pipes. in 1983, its southern and western berms were pushed out to form the outfield for Hobbs Field.

The Mokelumne Hill reservoir was built by 1854 and served the town until 1973 when the waters of the Mokelumne Hill canal were replaced with pipes. in 1983, its southern and western berms were pushed out to form the outfield for Hobbs Field.