It probably was California but there were 100's of non operating windmills. At the time there was no construction going on. Just deteriorating ones and new ones.
Yeah, sure they may have replaced them by now. But it's doubtful as the article stated, it's cheaper to leave them rot and and move on than tear them down.
like I said no abandoned wind farms in california. most likely what you saw and this is my best guess, is a couple of windmills needing repair and the rest not moving for several reasons, no wind, too much wind or they were not needed. I've seen the same thing. but my wife's family lives in palm springs we go there several times a year. by the way those windmills that have served their purpose are replaced or removed. palm springs is anal in a good way about that. they didnt want them in the first place, but now people are used to them. that's according to the link you posted. any windmill that outlives its purpose is replaced or removed. there used to be 4000, then 2000, now they think they could generate twice the electricity with 700, then again that is on the link you posted. no abandoned rusted windmills existed or have existed in palm springs. I only live 50 miles from there and have gone there since the 80's. now if you had said in the 90's, I could not really vouch for that as I was in the marines in 89, then moved to north caroline after leaving the marines and moved back in 98. but 6 or 7 years ago or the last 20 years, that is a misunderstanding on your part.
from 98 to 2008 I worked regularly in palm springs, after I got another job, me and my wife would travel there just about every month. all her family except for her mom lives there. I have not seen miles of rusted wind mills in the middle of the desert as you originally stated.