Here is a look back at the timing of key events in the history of the Edgemont uranium mining industry:
1951: Uranium deposits are discovered in a canyon wall near Edgemont.
1952: The U.S. Atomic Energy Commission opens an ore sampling and buying station in Edgemont, one of many Western sites where the federal government buys uranium to fuel its growing stockpile of nuclear weapons.
1953: The Chicago North Shore and Milwaukee Railroad reorganizes and emerges as a subsidiary of a new holding company, Susquehanna Corporation, which will soon come to dominate Edgemont’s uranium industry.
1955: Mines Development Inc., a subsidiary of Susquehanna Corp., builds a uranium mill in Edgemont.
1960: Edgemont’s population hits 1,772, a 53 percent increase from 1950.