Expedition Island - A National Historic Landmark in the heart of Green River. One might ask, what does it mean to be recognized as a National Registered Historic Landmark? To be listed the site must possess an exceptional value in commemorating a part of history to the United States. The Island obtained this status a mere 100 years after the famed river expeditions of John Wesley Powell in 1869 and again in 1871. Powell, a U.S. Army Major in the Civil War, launched his 1869 river adventure in May; Wyoming was not declared a territory until July of that year. The second launch in 1871 was...
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