I believe this is a Flint and Walling Windmill (maybe a Model 37?) - I'm not an expert on Windmills but took note since I mainly see Aeromotor Windmills. As usual the Windmill still stands but the work is done by a solar powered pump.
Tags: arizona,ironwood forest national monument,pima county,solar panels,solar pump,tank,tucson field office,water,windmill