The North Dakota map is my own map. I'd be happy to get more locations. Although there is an update form there, you can still give locations, and I'll add them.
Both Pine Island MN and Shelvin MN's allertors are gone. Shelvin was replaced in 2019 and Pine Island also in 2019. They were both replaced by 2001-130s. Theres also a few more old allertor locations in Bloomington MN.