Black Diamond beginnings: Black Diamond Post Office opens on July 22, 1885.

  • By Greg Lange
  • Posted 12/07/1998
  • Essay 458
The opening of a post office is an important marker of the beginning of a community. On July 22, 1885, Black Diamond Post Office opens. William B. Jones is appointed postmaster. Black Diamond is located in southeast King County along the Cascade Mountain range.

The town was built as a company town for the Black Diamond Coal Company.

Sources: Guy Reed Ramsey, "Postmarked Washington, 1850-1960," Microfilm (Olympia: Washington State Library, February, 1966).

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