"Our entire country has been surveyed based upon a 5280 foot mile."
Are you sure none of it was surveyed in Statute miles (whatever they are?) Or Nautical miles? At least there's only one variety of metre, and one kind of hectare.
There's only two kinds of miles today. The regular one and the nautical one. The regular one is aka "statute mile" because:
In 1592, Parliament settled the question in England by defining the statute mile to be 8 furlongs, 80 chains, 320 rods, 1760 yards or 5280 feet. The statute mile is exactly 1609.344 meters.
SD