I think I've seen this windmill, or one like it, when driving on Harvard between University and Michelson. It is across the river that runs along side of Harvard there.
A retired windmill in front of the Irvine Ranch Water District Facility.
This windmill is one of 1,200 such water-pumping devices that once served the Irvine Ranch before modern water systems were avaialble. Jim, a long-time employee of Irvine Rach Water District, was responsible for dismantling and reconstructing it on numerous occasions as it was moved to various locations to preserve a piece of local history. This windmill will always serve as a fond rememberance of Jim.