Los Osos, CA Mines

Mine	Owner	Land Status	Work Type	Minerals
Arrisa Mine				Gypsum-Anhydrite
Ferrell Deposit		Unknown		Diatomite
Gravel Pit		Unknown		Sand and Gravel
Gravel Pit		Unknown		Sand and Gravel
Gravel Pit		Unknown		Sand and Gravel
Gravel Pit		Unknown		Sand and Gravel
Gravel Pit		Unknown		Sand and Gravel
Gravel Pit		Unknown		Sand and Gravel
Gravel Pit		Unknown		Sand and Gravel
Gravel Pit		Private		Sand and Gravel
Gravel Pit		Unknown		Sand and Gravel
Gravel Pit		State Park		Sand and Gravel
Gravel Pits		Unknown		Sand and Gravel
Incello Company		Unknown		Diatomite
Jobe Ranch Deposit		Unknown		Chromium
Jobe Ranch Mine				Manganese
Johe Ranch Deposit	Louise E. Serrano	Private		Manganese Silica
Lanscioni Prospect				Manganese
Lanscioni Prospect	Mrs. Luisa Lancioni			Manganese
Los Osos				Cobalt Copper Gold Nickel Silver
Los Osos Mine			Underground	Copper Gold Sand and Gravel
Los Osos Mine		Private		Copper Gold Silver
McKinney Iron Mines		Unknown		Iron
Mountain View Deposit	Mrs Grace Thornberg	Private		Chromium
Mountain View Deposit		Unknown		Chromium
Red Rock Pit	J. H. Beecham			Stone, Crushed
San Luis Range Diatomite		Private		Diatomite
Sand Pit		Unknown		Sand and Gravel
Sand Pit		Unknown		Sand and Gravel
Serrano Prospect				Manganese
Serrano Prospect	Carlos Serrano			Manganese
Silver Swan			Underground	Copper
Unknown	George M. Johe	Private		Chromium
Welch Mine				Manganese
Welch Mine				Manganese
Welch Mine	Mr. Welch	Private		Manganese
Welch Ranch Deposit		Unknown		Chromium
Welch Ranch Occurrence	Joseph C. Welch	Private		Chromium