The closure of gold mines during World War II by the War Production Board Limitation Order No. 208 in autumn 1942 had a major impact on the plummeting of gold production until the end of the war.
During the 1980s, there was a resurgence in US gold production due to its increasing value and the use of heap leaching to recover gold from disseminated low-grade deposits in Nevada and other states.
In 2015 the United States produced 200 tonnes of gold, 6.7% of world production. Most gold produced today in the US comes from large open-pit heap leach mines in the state of Nevada.
Map of operational and closed gold mines in the US:
Source: Wikipedia