[maxerickson]

800 of 4900 turbines are shutting down.

https://en.wikipedia.org/wiki/Altamont_Pass_Wind_Farm

It's not clear from that what the other operators are doing, but there seems to be some work put into replacing smaller turbines with larger ones that are less disruptive to birds.

[jerven]

These are old, small turbines going offline. They will be replace by a 100 new ones that are going to produce a lot more power.

Funnily enough, these old wind turbines are worth good money in pure raw materials. Expect near 100% recycling for them.