Mines in San Mateo County, California

San Mateo County, California has 133 mine and mineral deposit locations documented in federal records from the USGS and MSHA. 59 of these are currently active mining operations. The most commonly recorded commodity is stone, crushed/broken, with 48 sites. The table below lists all recorded mines in the county with links to individual site details.

All Mines in San Mateo County

Mine	Commodity	Type	Status	Source
Langley Hill Quarry	Crushed, Broken Traprock	Surface	Active	MSHA
Brisbane	Stone, Crushed/Broken		Producer	MRDS
Brisbane Quarry	Stone	Surface	Producer	MRDS
Britton Ranch	Stone		Producer	MRDS
California Valley Gypsum Mine	Gypsum-Anhydrite	Surface	Producer	MRDS
Canada Road North	Stone, Crushed/Broken		Producer	MRDS
Canada Road South	Stone, Crushed/Broken		Producer	MRDS
Casey	Stone, Crushed/Broken		Producer	MRDS
Causeway	Stone, Crushed/Broken		Producer	MRDS
Daly S	Stone, Crushed/Broken		Producer	MRDS
Edgewood Quarry and Mill	Stone, Crushed/Broken	Surface	Producer	MRDS
Edgewood Road	Stone, Crushed/Broken		Producer	MRDS
El Granada	Stone		Producer	MRDS
Emerald Lake	Mercury		Producer	MRDS
Gardner	Stone, Crushed/Broken		Producer	MRDS
H. P. A.	Stone, Crushed/Broken		Producer	MRDS
Healy-Tibbitts	Stone, Crushed/Broken		Producer	MRDS
Hilltop	Calcium		Producer	MRDS
Holy Cross	Stone, Crushed/Broken		Producer	MRDS
Ideal Cement Company	Limestone, General	Processing Plant	Producer	MRDS
Kaiser Gypsum	Gypsum-Anhydrite		Producer	MRDS
Langley Hill Quarry	Stone		Producer	MRDS
Langley Hill Quarry	Stone, Crushed/Broken	Surface	Producer	MRDS
Macco-Morrison Knudston Costr. Co.	Stone, Crushed/Broken		Producer	MRDS
Marine Magnes Div.	Magnesite		Producer	MRDS
Marine Magnesium Co. Seawater Plant	Magnesite	Brine Operation	Producer	MRDS
Marks Materials	Stone, Crushed/Broken	Surface	Producer	MRDS
Marks Materials Inc.	Calcium		Producer	MRDS
Middle Road	Stone, Crushed/Broken		Producer	MRDS
Miguel	Granite		Producer	MRDS
North Road	Stone, Crushed/Broken		Producer	MRDS
Pacifica Quarry and Mill	Stone	Surface	Producer	MRDS
Pascadero Beach	Gemstone		Producer	MRDS
Pescadero Quarry	Stone, Crushed/Broken	Surface	Producer	MRDS
Pilarcitos #138	Stone		Producer	MRDS
Pilarcitos Quarry	Sand and Gravel, Construction	Surface	Producer	MRDS
Pilarcitos Quarry and Plant No. 138	Stone, Crushed/Broken	Surface	Producer	MRDS
Quarry	Stone		Producer	MRDS
Quarry	Stone		Producer	MRDS
Quarry	Stone		Producer	MRDS
Redwood City Operation	Halite		Producer	MRDS
Redwood City Plant	Salt	Brine Operation	Producer	MRDS
Redwood City Plant	Salt	Surface	Producer	MRDS
Redwood Material Co.	Manganese		Producer	MRDS
Rockaway	Calcium		Producer	MRDS
San Francisco Bay Dredge	Calcium	Surface	Producer	MRDS
San Mateo Development Co.	Stone, Crushed/Broken		Producer	MRDS
San Mateo Development Co.	Stone, Crushed/Broken		Producer	MRDS
Skyline Quarry	Calcium		Producer	MRDS
South Road	Stone, Crushed/Broken		Producer	MRDS
South S. F. Land & Improvement Co.	Stone, Crushed/Broken		Producer	MRDS
South San Fran. Land & Imp. Co.	Silver		Producer	MRDS
Southern Pacific Co.	Stone, Crushed/Broken		Producer	MRDS
Splivalo & Johnson	Stone, Crushed/Broken		Producer	MRDS
Tyson	Stone, Crushed/Broken		Producer	MRDS
Unnamed Location	Stone		Producer	MRDS
Unnamed Location	Gold		Producer	MRDS
Unnamed Location	Gypsum-Anhydrite		Producer	MRDS
Unnamed Location	Gold		Producer	MRDS
Archibald	Stone, Crushed/Broken		Past Producer	MRDS
Black Mountain	Gold	Surface	Past Producer	MRDS
Black Mtn.	Gold		Past Producer	MRDS
Brisbane Plant	Construction Sand and Gravel	Surface	Abandoned	MSHA
Britton Ranch	Stone	Surface	Past Producer	MRDS
Brumley-Donaldson Co.	Sand and Gravel, Construction		Past Producer	MRDS
Brumley-Donaldson Co.	Sand and Gravel, Construction		Past Producer	MRDS
Calif. Aggregates	Calcium		Past Producer	MRDS
Canada	Stone		Past Producer	MRDS
Canada	Stone	Surface	Past Producer	MRDS
Canada Road North	Stone, Crushed/Broken	Surface	Past Producer	MRDS
Canada Road South	Stone, Crushed/Broken	Surface	Past Producer	MRDS
Casey	Stone, Crushed/Broken	Surface	Past Producer	MRDS
Causeway	Stone, Crushed/Broken	Surface	Past Producer	MRDS
Challenge	Mercury		Past Producer	MRDS
Daly S	Stone, Crushed/Broken	Surface	Past Producer	MRDS
Deniston Peak	Gold		Past Producer	MRDS
Dennison Peak	Gold		Prospect	MRDS
Duncan	Sand and Gravel, Construction		Past Producer	MRDS
Duncan	Sand and Gravel, Construction	Surface	Past Producer	MRDS
Durham Ranch	Gold		Past Producer	MRDS
Durham Ranch	Gold		Unknown	MRDS
El Granada	Stone	Surface	Past Producer	MRDS
Farm Hill Cinnabar Property	Mercury	Surface	Unknown	MRDS
Farm Hill No 2	Mercury	Surface	Past Producer	MRDS
Gardner	Stone, Crushed/Broken	Surface	Past Producer	MRDS
Granite Rock	Sand and Gravel, Construction		Past Producer	MRDS
Granite Rock	Sand and Gravel, Construction	Surface	Past Producer	MRDS
Guadalupe	Crushed, Broken Sandstone	Surface	Intermittent	MSHA
H. P. A.	Stone, Crushed/Broken	Surface	Past Producer	MRDS
Harbor Plant	Construction Sand and Gravel	Surface	Abandoned	MSHA
Healy-Tibbitts	Stone, Crushed/Broken	Surface	Past Producer	MRDS
Hilltop	Calcium	Surface	Past Producer	MRDS
Holy Cross	Stone, Crushed/Broken	Surface	Past Producer	MRDS
Ideal Cement Co.	Limestone, Dimension	Surface	Past Producer	MRDS
J. M. Macdonough	Gold		Unknown	MRDS
J.m. Macdonough Ranch	Gold		Past Producer	MRDS
Kaiser Gypsum	Gypsum-Anhydrite	Surface	Past Producer	MRDS
Macco-Morrison Knudston Costr. Co.	Stone, Crushed/Broken	Surface	Past Producer	MRDS
Marine Magnes Div.	Magnesite	Surface	Past Producer	MRDS
Middle Road	Stone, Crushed/Broken	Surface	Past Producer	MRDS
Miguel	Stone, Crushed/Broken	Surface	Past Producer	MRDS
North Road	Stone, Crushed/Broken	Surface	Past Producer	MRDS
Pilarcitos Quarry	Crushed, Broken Stone NEC	Surface	Abandoned	MSHA
Pacific Coast Aggregates, Inc.	Sand and Gravel, Construction		Past Producer	MRDS
Pascadero Beach	Gemstone	Surface	Past Producer	MRDS
Pilarcitos	Sand and Gravel, Construction		Past Producer	MRDS
Powerscreen Plant	Construction Sand and Gravel	Surface	Abandoned	MSHA
Quarry	Stone	Surface	Past Producer	MRDS
Quarry	Stone	Surface	Unknown	MRDS
Quarry	Stone	Surface	Past Producer	MRDS
Quarry	Stone	Surface	Past Producer	MRDS
Quarry	Stone		Unknown	MRDS
Redwood City Operation	Salt	Surface	Past Producer	MRDS
Redwood Material Co.	Manganese	Surface	Past Producer	MRDS
Redwood Quicksilver Prospect	Mercury	Surface	Unknown	MRDS
Rockaway	Sand and Gravel, Construction		Past Producer	MRDS
Rockaway	Calcium	Surface	Past Producer	MRDS
San Mateo Development Co.	Stone, Crushed/Broken	Surface	Past Producer	MRDS
San Mateo Development Co.	Stone, Crushed/Broken	Surface	Past Producer	MRDS
Sand Pit	Sand and Gravel, Construction	Surface	Unknown	MRDS
Skyline Quarry	Calcium	Surface	Past Producer	MRDS
South Road	Stone, Crushed/Broken	Surface	Past Producer	MRDS
South S. F. Land & Improvement Co.	Stone, Crushed/Broken	Surface	Past Producer	MRDS
South San Fran. Land & Imp. Co.	Silver	Surface	Past Producer	MRDS
South San Francisco Land & Improvement Company	Silver		Past Producer	MRDS
Southern Pacific Co.	Stone, Crushed/Broken	Surface	Past Producer	MRDS
Splivalo & Johnson	Stone, Crushed/Broken	Surface	Past Producer	MRDS
Tyson	Stone, Crushed/Broken	Surface	Past Producer	MRDS
Unnamed Location	Gold	Surface	Past Producer	MRDS
Unnamed Location	Gypsum-Anhydrite	Surface	Past Producer	MRDS
Unnamed Location	Stone	Surface	Past Producer	MRDS
Unnamed Location	Gold	Surface	Past Producer	MRDS
Vasquez	Stone, Crushed/Broken		Past Producer	MRDS