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May 10

posted May 10, 2014, 5:18 AM by vfe_ai_venice.beske@wyo.gov   [ updated Aug 17, 2015, 3:39 PM by Travis Pollok ]
1869 On May 10, 1869, the tracks of the Union Pacific and Central Pacific railways were connected at Promontory Summit, Utah.

1872 On May 10, 1872, Congress passed the "General Mining Act" which promoted the development of mining resources in the United States.

1903 Winchester Post Office was established on May 10, 1903 in Big Horn County prior to the formation of Washakie County.