Eastern Idaho Cooperative Agencies Wireless Interoperable Network (EICAWIN)
From The RadioReference Wiki
This Project 25 TRS is now online, and currently operational for Emergency Services serving five Eastern Idaho counties(Bonneville, Jefferson, Madison, Fremont, and Clark). Although this is a standalone system it allows for full interoperability with the state ICAWIN P25 TRS. It also allows for interoperability with previously existing Fire and EMS VHF radio systems in these counties.
The following is a description of the radio system as provided by the system supplier. Included is an Idaho county map showing the counties participating in this system. http://forums.radioreference.com/attachments/idaho-radio-discussion-forum/20746d1235358519-state-idaho-700-mhz-iimars-idahofactsheet.pdf