San Francisco Mint

San Francisco Mint. A branch of the United States Mint, it was established in 1854 to serve the California Gold Rush and convert mined gold into coins. It has operated from three distinct facilities, with the second building, known as the "Granite Lady," famously surviving the 1906 San Francisco earthquake. Today, it primarily produces proof and commemorative coins for collectors, remaining a key facility within the Federal government of the United States.

History

The establishment was authorized by Congress in 1852, opening its first building at Commercial Street in 1854 under the superintendency of Mint Director Robert M. Patterson. Its creation was a direct federal response to the economic chaos of the California Gold Rush, which had flooded the West Coast with raw bullion but lacked official coinage. The first facility quickly proved inadequate, leading to the construction of a monumental new building, which opened in 1874. This second mint played a crucial role after the 1906 San Francisco earthquake, as its robust structure allowed it to safeguard the city's treasury reserves and become a temporary post office and bank. Operations moved to a third, modern facility in Heron Bay in 1937, with the historic building later housing the San Francisco Museum & Historical Society and undergoing preservation efforts led by the National Park Service.

Architecture

The iconic second building, designed by Treasury Architect Alfred B. Mullett, is a prime example of Greek Revival style, constructed with thick walls of granite from Rocklin quarries. Its fortress-like appearance, featuring a central portico with Corinthian columns, earned it the nickname "The Granite Lady" and symbolized federal permanence and security. The interior originally contained advanced coining presses, assaying laboratories, and massive vaults, with design elements intended to deter counterfeiting and theft. This structure was designated a National Historic Landmark in 1961 and is also listed on the National Register of Historic Places, recognized for its architectural significance and role in the financial history of the American West.

Operations and production

As a branch of the United States Mint, its core function has been the minting of dollar denominations, initially focusing on gold coins like the Double eagle and Half eagle from Mother Lode deposits. Following the Coinage Act of 1965, it transitioned from general circulation coinage to specializing in proof coins, commemorative coins, and American Eagle bullion coins. The modern facility utilizes advanced machining and striking techniques, producing numismatic products that are highly sought by collectors worldwide. Its output is distributed through the United States Mint's official site and is integral to programs managed by the Bureau of the Fiscal Service.

Notable coins and collections

It has produced some of the most famous and valuable United States coinage, including the rare 1870-S Seated Liberty dollar, of which only a few are known to exist. The facility struck the 1909-S Indian Head cent and later key Morgan dollar dates, which are staples of coin collecting. Its modern proof sets, such as those containing the 50 State Quarters, and special issues like the 1995-W American Silver Eagle, are central to many collections. Coins bearing its "S" mint mark are meticulously cataloged by organizations like the American Numismatic Association and are featured in major auctions by firms like Stack's Bowers Galleries.

Security and incidents

Designed as a virtual fortress, the second building's security features included barred windows, iron shutters, and a central courtyard to prevent access to the bullion vaults, which withstood the fires of the 1906 San Francisco earthquake. Despite this, it was the target of a significant heist in 1854 when an assayer embezzled over $30,000 in gold, leading to his conviction and highlighting early vulnerabilities. The facility's resilience was proven during the 1906 disaster when Superintendent Frank A. Leach and employees protected the treasury, securing the building against looting in the aftermath. These historic events have been documented by the Federal Bureau of Investigation and are part of the lore studied by the Smithsonian Institution.

Category:United States Mint Category:Buildings and structures in San Francisco Category:National Historic Landmarks in California