When was the county, where Shelby Airport is located, established ?
Shelby Airport Shelby Airport (IATA: SBX, ICAO: KSBX, FAA LID: SBX) is a county owned airport two miles north of Shelby, in Toole County, Montana. The National Plan of Integrated Airport Systems for 2011–2015 called it a "general aviation" airport.
Merrimack County, New Hampshire Merrimack County is a county in the U.S. state of New Hampshire. As of the 2010 census, the population was 146,445, making it the third-most populous county in New Hampshire. Its county seat is Concord, the state capital. The county was organized in 1823 from parts of Hillsborough and Rockingham counties, and is named for the Merrimack River.