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A bill to introduce the land near the head-waters of yellowstone river as a public park.
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The senate debated and passed the bill.
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The bill was passed by a vote of 115 to 65.
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On March 1st, 1872, President Ulysses S. Grant signed "An act to set apart a certain Tract of Land lying near the Head-waters of the Yellowstone River as a public Park."