Re: Test
Well there's water but the precipitation stops from late spring to early autumn. You couldn't grow crops unless they were irrigated. Contrast this to the eastern US where it pretty much rains every month even through the summer.
Southern Idaho doesn't risk being a desert: it IS a desert.
But even deserts can have major rivers running through them. Think of Egypt and the Nile.
The NY Canal had several financial crisis during construction. To secure adequate funding, local real estate promotors sold a bunch of shares to NY bankers on Wall Street. These shares were sold in a burst of brown-nose advertising as shares in a "New York Canal District".

Does this remind you of any financial situation at present?
The NY Canal is an inspiring piece of engineering, snaking across two counties purely by gravity. Must have had some great surveyors on the project - no GPS back in 1900.