Past failed county secession proposals in your state

[Pink Jazz]

In my largest suburb thread, I briefly mentioned about the East Valley of the Phoenix metro area seceding from Maricopa County and forming their own county. This has been proposed a few times by former state Senator Russell Pearce. The base proposals included the cities and towns of Mesa (which would have been the county seat), Chandler, Gilbert, and Queen Creek. Some expanded proposals also included the City of Tempe, and I think one even included Scottsdale.

I'd assume Tempe would not want to join since they would be the only liberal city in an otherwise conservative dominated county, putting them at a disadvantage. Also, I don't think East Valley residents would support the idea either because they wouldn't want to lose Sherriff Joe Arpaio.

Two of the proposed names for the county included either Red Mountain County or Rio Salado County.

So, I would like to know, does anyone have any examples of some past failed county secession proposals in your state?