I was doing some Google Earth siren hunting and I made a couple of interesting discoveries.
Whelen WS-2000-20/2020 at Winner, SD:
43°22'30.02"N, 99°51'15.26"W
What looks to be an ATI or ASC E-Class on the satellite imagery at Mission, SD (there is no Street View in the area). Replaced an XT22, whatever it is:
43°18'19.32"N, 100°39'35.45"W