U.S. Geography
Located in Nevada, what was the highest concrete dam in the world when it was built?
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Which Missouri city was the convergence of the Santa Fe and Oregon Trails?
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What has happened to the population of Oregon between 2000 and 2010 according to the census?
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What is the name of Maryland's Route 40, the first federally-funded highway in the United States?
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Located in Nevada, what was the highest concrete dam in the world when it was built?
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What does California produce 17 million gallons of each per year?
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