Mining History in America

The United States has been shaped by mining from its earliest colonial days to the present. Federal databases document mine openings across more than three centuries, from 18th-century iron forges to 21st-century lithium operations. The timeline below organizes this history by era, with mine counts drawn from the USGS Mineral Resources Data System and MSHA records.

Mines by Era

Era	Period	Mines Opened
Colonial Era (before 1776)	Before 1776	101
Early Republic (1776–1848)	1776–1848	553
Gold Rush Era (1849–1879)	1849–1879	3,083
Industrial Age (1880–1929)	1880–1929	10,188
Depression & War (1930–1949)	1930–1949	3,606
Postwar Boom (1950–1979)	1950–1979	4,020
Modern Era (1980–present)	1980–present	622

Colonial Era (before 1776)

Mining in colonial America focused on iron, copper, and lead — essential materials for a growing settlement economy. The earliest mines in federal records predate the Revolutionary War, concentrated in the eastern states from Virginia to Connecticut.

Federal databases record 101 mines with first production or discovery dates in this period.

Mine	State	Commodity	Year
Pecos River Valley Pecos Diamonds Deposits	New Mexico	Quartz, Gemstone	0
Panther Canyon-1	Texas	Copper	0
Pardo Prospect	North Carolina	Copper, Lead, Zinc	0
Zuni Salt Lake	New Mexico	Halite	0
Roberts Prospect	Texas	Arsenic	0
Chatham Great Hill Cobalt Nickel Arsenopyrite Mine	Connecticut	Arsenic, Iron, Nickel, Cobalt	0
Gap Nickel Mine	Pennsylvania	Nickel	0
J. Mostellar Tin Mine Cut	North Carolina	Tin, Lithium	0
Margaret Mine	Virginia	Iron	0
Barnes Mine	Virginia	Copper	0
Pahaquarry Mine	New Jersey	Copper	0
Pahaquarry Mine	New Jersey	Copper	0
S.c. Taylor Mine	Virginia	Gold, Silver	0
El Yunque	Puerto Rico	Copper	0
Island Queen Mine	Puerto Rico	Iron	0

Early Republic (1776–1848)

After independence, mining expanded westward with the new nation. Lead mining boomed in Missouri and Illinois. Iron foundries grew across Pennsylvania. Gold was discovered in Georgia and the Carolinas decades before the more famous California rush.

Federal databases record 553 mines with first production or discovery dates in this period.

Mine	State	Commodity	Year
Slater Mine	Missouri	Copper	0
Desloge Mines	Missouri	Lead	0
Parole Mine	Missouri	Barium-Barite, Lead	0
Castle Rock Springs Claim	Colorado	Copper	0
Medicine Mounds-E-1	Texas	Copper	0
Olney-1	Texas	Copper	0
Whippoorwill Branch Placer Workings	Tennessee	Gold	0
Shelton Barite Mine	Tennessee	Barium-Barite	0
Smart Mine	North Carolina	Gold	0
Douglas Flat	California	Gold	0
T.t. Erwin Mine	North Carolina	REE, Gold	0
Chaboya - Hillsdale	California	Mercury	0
New Almaden - San Francisco Area	California	Mercury	0
San Antonio	California	Mercury	0
Tule Canyon Placers	Nevada	Gold	0

Gold Rush Era (1849–1879)

The California Gold Rush of 1849 transformed American mining overnight. Within a decade, silver strikes in Nevada (the Comstock Lode) and gold discoveries across the West drew hundreds of thousands of prospectors. The Transcontinental Railroad opened access to remote mineral deposits.

Federal databases record 3,083 mines with first production or discovery dates in this period.

Mine	State	Commodity	Year
Copper Queen Prospect	Alaska	Copper, Iron	0
Zaca	California	Gold	0
Superior	California	Gold	0
Helena District	Montana	Gold, Silver	0
Otto	Arkansas	Antimony, Lead	0
Valley View	Arizona	Manganese	0
Madonna Mine	Colorado	Lead, Silver, Zinc	0
Champion Mine	New Mexico	Copper	0
Green's Hill Mine	Missouri	Lead	0
Daniel Mine	Missouri	Iron	0
Quartz Creek Placer Mines	Montana	Gold	0
Jeff Davis	Montana	Gold	0
Park Mine	Montana	Silver, Copper, Zinc, Gold	0
Trapper Mine	Montana	Lead, Silver, Gold, Copper	0
Keokirk-Elm Orlu Group	Montana	Silver, Copper	0

Industrial Age (1880–1929)

Industrialization created enormous demand for coal, iron, copper, and other minerals. Large-scale corporate mining replaced individual prospectors. Coal powered the railroads and steel mills. Copper wired the nation for electricity. This era saw the most mine openings in American history.

Federal databases record 10,188 mines with first production or discovery dates in this period.

Mine	State	Commodity	Year
Kimbrough Mine	Arkansas		0
Manganese Field Mine	Arkansas		0
Hula Hula Claim	Alaska	Gold	0
Flagstaff Mining Co.	Alaska	Gold	0
Golden Fleece Mining Co.	Alaska	Gold	0
Coronation Island Mining Co.	Alaska	Lead	0
Cook Claim	Alaska	Gold	0
Poorman Prospect	Alaska	Iron	0
Dawson Mine	Alaska	Gold	0
Mount Vesta Prospect	Alaska	Gold, Silver	0
McLeod Bay Prospect	Alaska	Gold	0
Bullion	Alaska	Gold	0
Copper Bullion Prospect	Alaska	Copper	0
Shakan	Alaska	Molybdenum	0
Alaska Oracle Mining Co.	Alaska	Gold	0

Depression & War (1930–1949)

The Great Depression shuttered many mines, but strategic mineral needs during World War II revived the industry. Uranium mining began in earnest. The federal government stockpiled critical minerals and funded new exploration.

Federal databases record 3,606 mines with first production or discovery dates in this period.

Mine	State	Commodity	Year
Hy Grade Placer	Montana		0
Nunatak Prospect	Alaska	Molybdenum	0
Sandy Cove Prospect	Alaska	Gold, Silver	0
Sunrise Canyon Manganese Prospect	Alaska	Manganese	0
Mine Mtn. Copper-Zinc-Lead Occurrence	Alaska	Lead, Zinc, Copper	0
Kwiniuk River Occurrence	Alaska	REE	0
Clear Creek Occurrence	Alaska	Uranium, Niobium (Columbium)	0
Lake Elfendahl Copper-Zinc-Lead Occurrence	Alaska	Lead, Zinc, Copper	0
Copper Creek Placer	Alaska		0
North Crillon Glacier Nickel Occurrence	Alaska	Nickel, Platinum	0
Cub Mtn. Gold Occurrence	Alaska	Gold	0
Hanlon Gold Prospect	Alaska	Gold	0
3 J Copper-Molybdenum Prospect	Alaska	Molybdenum, Copper	0
Hill Chromite Prospects	Alaska	Chromium	0
Cornwallis Peninsula Barite-Witherite Prospects	Alaska	Barium-Barite	0

Postwar Boom (1950–1979)

The postwar economic boom drove demand for construction materials, energy minerals, and metals. Strip mining expanded dramatically. Environmental concerns grew, leading to the Surface Mining Control and Reclamation Act of 1977 — the first major federal regulation of mine land reclamation.

Federal databases record 4,020 mines with first production or discovery dates in this period.

Mine	State	Commodity	Year
Nenana Claims	Alaska	Copper	0
Romero	New Mexico		0
Wood Cove Occurrence	Alaska	Molybdenum	0
Mallard Bay Occurrence	Alaska	Iron	0
Forrester Point Occurence	Alaska	Molybdenum	0
Carol Ann Prospects	Alaska	Uranium	0
I and L Prospect 3	Alaska	Uranium, Thorium	0
I and L Prospects, 1 and 2	Alaska	Uranium, Thorium	0
Number One Prospect, I, L and M Prospects	Alaska	Uranium	0
Number Two Prospect, I,l, and M Prospects	Alaska	Uranium	0
Wennie Prospect, Lazo Group	Alaska	Thorium, Uranium	0
Atom Marietta Prospect	Alaska	Uranium, Thorium	0
Little Joe Prospect	Alaska	Uranium, Thorium	0
Geiger Prospect	Alaska	Uranium	0
Unnamed Near Salmon Bay	Alaska	Uranium, Thorium	0

Modern Era (1980–present)

Modern mining is characterized by fewer but larger operations, advanced technology, stricter safety and environmental regulation, and global commodity markets. MSHA was established in 1977 to enforce mine safety. Today's active mines operate under comprehensive federal oversight.

Federal databases record 622 mines with first production or discovery dates in this period.

Mine	State	Commodity	Year
Mariposa Ridge Occurrence	Alaska	Lead, Zinc, Silver	0
Tsirku River Gold Placer Occurrence	Alaska	Gold	0
Unnamed Prospect	Alaska	Copper, Lead	0
Unnamed Prospect	Alaska	Copper, Lead	0
Hurst Mountain Occurence.	Alaska	Chromium, Platinum	0
Mt. Hurst Occurrence	Alaska	Chromium	0
Mt. Hurst Occurrence	Alaska	Chromium	0
Mt. Hurst Occurrence	Alaska	Chromium	0
Mt. Hurst Occurrence	Alaska	Chromium	0
Mt. Hurst Occurrence	Alaska	Chromium	0
Kim W Mine	Utah	Lead, Silver	0
On Claims	Colorado		0
Silver Dollar Claims	Colorado		0
Lulu and Rufus Claims	Colorado		0
Bonito Property	New Mexico	Gold	0