Mines in Middlesex County, Connecticut

Middlesex County, Connecticut has 155 mine and mineral deposit locations documented in federal records from the USGS and MSHA. 14 of these are currently active mining operations. The most commonly recorded commodity is feldspar, with 47 sites. The table below lists all recorded mines in the county with links to individual site details.

All Mines in Middlesex County

Mine	Commodity	Type	Status	Source
Arnold Pegmatite Quarry	Feldspar		Producer	MRDS
Blakeslee-Arpaia-Chapman S&g Co	Sand and Gravel, Construction	Surface	Producer	MRDS
Connecticut Valley Sand and Stone	Sand and Gravel, Construction	Surface	Producer	MRDS
Enegren (Power) Mica Mine	Mica		Producer	MRDS
Feldspar Pegmatite Quarry No. Cj-062	Feldspar		Producer	MRDS
Hale Mine	Feldspar	Surface	Producer	MRDS
Hale Pegmatite Quarry	Feldspar		Producer	MRDS
Madison Mine and Plant	Sand and Gravel, Construction	Surface	Producer	MRDS
Middletown Mine	Feldspar	Surface	Producer	MRDS
Portland Town Pit	Sand and Gravel, Construction	Surface	Producer	MRDS
Shore Line Concrete Sand Pit	Sand and Gravel, Construction	Surface	Producer	MRDS
White Rock Pegmatite Quarries	Feldspar		Producer	MRDS
Y.m.c.a. Pit	Sand and Gravel, Construction	Surface	Producer	MRDS
Yard Number 2 Pit and Plant	Clay	Surface	Producer	MRDS
Amphibolite Gneiss Rockquarry No. Cj-028	Stone		Past Producer	MRDS
Anderson Mica Mines and Swanson Lithia Mine	Mica, Lithium		Past Producer	MRDS
Anderson No. 1 Mica Mine	Mica	Surface-Underground	Past Producer	MRDS
Andrews Pegmatite Quarry	Feldspar		Past Producer	MRDS
Andrews Quarry	Feldspar	Surface	Past Producer	MRDS
Arkose Rock Quarry No. Cj-037	Stone, Dimension		Past Producer	MRDS
Arnold Quarry	Stone, Dimension	Surface	Past Producer	MRDS
Bailey Mica Prospects	Mica	Surface	Prospect	MRDS
Bainerd Quarry	Feldspar	Surface	Past Producer	MRDS
Basalt Rock Quarries No. Ck-006	Stone, Crushed/Broken		Past Producer	MRDS
Basalt Rock Quarry No. Cj-071	Stone, Crushed/Broken		Past Producer	MRDS
Basalt Rock Quarry No. Cj-071.	Stone, Dimension	Surface	Past Producer	MRDS
Basalt Rock Quarry No. Ck-006.	Stone, Dimension	Surface	Past Producer	MRDS
Benvenue Granite Gneiss Rock Quarries	Stone, Dimension		Past Producer	MRDS
Benvenue Quarries	Granite	Surface	Past Producer	MRDS
Beryl Feldspar Pegmatite Prospect No. Cj-035	Feldspar		Occurrence	MRDS
Bordonaro Beryl Prospect	Feldspar, Mica	Surface	Past Producer	MRDS
Bordonaro Beryl Prospect and Feldspar and Mica Mine	Feldspar		Past Producer	MRDS
Brownstone Quarries	Flagstone	Surface	Past Producer	MRDS
Brownstone Sandstone Quarries No. Ck-004	Stone, Dimension		Past Producer	MRDS
Carl Pointkowski Pit	Construction Sand and Gravel	Surface	Abandoned	MSHA
Case Beryl Prospects	Feldspar	Surface	Past Producer	MRDS
Case Beryl and Feldspar Prospect Quarries	Feldspar		Past Producer	MRDS
Case Prospect	Feldspar		Prospect	MRDS
Chatham Cobalt Mine	Cobalt	Surface	Past Producer	MRDS
Chatham Great Hill Cobalt Nickel Arsenopyrite Mine	Arsenic, Iron, Nickel, Cobalt		Past Producer	MRDS
Chatham Great Hill Mine	Cobalt, Nickel		Past Producer	MRDS
Consolidated Feldspar Corp Quarry	Feldspar	Surface	Past Producer	MRDS
Deep River	Crushed, Broken Stone NEC	Surface	Intermittent	MSHA
Deep River Sand and Gravel Pit	Sand and Gravel, Construction	Surface	Past Producer	MRDS
East Selden Mica, Beryl, Feldspar Quarry	Mica, Feldspar, Tantalum, Niobium (Columbium)		Past Producer	MRDS
Enegren Mica Mine	Mica	Surface-Underground	Prospect	MRDS
Essex Quarry	Construction Sand and Gravel	Surface	Abandoned	MSHA
Feldspar Pegmatite Dike No. Cj-049	Feldspar		Past Producer	MRDS
Feldspar Pegmatite Dike Quarry No. Cj-047	Feldspar		Past Producer	MRDS
Feldspar Pegmatite Prospects No. Cj-054			Occurrence	MRDS
Feldspar Pegmatite Quarry No. Cj-021	Feldspar		Past Producer	MRDS
Feldspar Pegmatite Quarry No. Cj-025	Feldspar		Past Producer	MRDS
Feldspar Pegmatite Quarry No. Cj-033	Feldspar		Past Producer	MRDS
Feldspar Pegmatite Quarry No. Cj-044	Feldspar		Past Producer	MRDS
Feldspar Pegmatite Quarry No. Cj-045	Feldspar		Past Producer	MRDS
Feldspar Quarries	Feldspar	Surface	Past Producer	MRDS
Feldspar Quarry	Feldspar	Surface	Past Producer	MRDS
Garnet Mine	Garnet	Surface	Past Producer	MRDS
Gillette Gem Tourmaline, Mineral Specimens, Mica, Feldspar Mine (also	Gemstone, Mica, Feldspar		Past Producer	MRDS
Gillette Quarry		Surface-Underground	Past Producer	MRDS
Gneiss Quarries	Granite	Surface	Past Producer	MRDS
Gneiss Quarry	Granite	Surface	Past Producer	MRDS
Gneiss Quarry	Granite	Surface	Past Producer	MRDS
Gotta-Walden Feldspar Prospect Quarry	Feldspar		Past Producer	MRDS
Gotta-Walden Mica-Beryl Prospect	Beryllium	Surface	Prospect	MRDS
Governor Winthrops Mine	Gold	Surface	Past Producer	MRDS
Granite Gneiss Rock Quarries No. Cj-030	Stone		Past Producer	MRDS
Granite Gneiss Rock Quarries No. Cj-040	Stone		Past Producer	MRDS
Granite Gneiss Rock Quarry No. Cj-034	Stone		Past Producer	MRDS
Granitic Gneiss Rock Quarry No. Cj-046	Stone		Past Producer	MRDS
Granitic Gneiss Rock Quarry No. Cj-052	Stone		Past Producer	MRDS
Granitic Gneiss Rock Quarry No. Cj-055	Stone		Past Producer	MRDS
Granitic Gneiss Rock Quarry No. Cj-058	Stone		Past Producer	MRDS
Granitic Gneiss Rock Quarry No. Cj-060	Stone		Past Producer	MRDS
Granitic Gneiss Rock Quarry No. Cj-061	Stone		Past Producer	MRDS
Great Hill		Underground	Past Producer	MRDS
Great Hill State Forest No. 1 Mica Quarry	Mica		Past Producer	MRDS
Haddam Pit Hood & Smith Pit	Sand and Gravel, Construction	Surface	Past Producer	MRDS
Halberg Quarries	Mica	Surface	Past Producer	MRDS
Hale Mine	Feldspar		Past Producer	MRDS
Hale Pegmatite Quarry	Feldspar	Surface	Past Producer	MRDS
Hale-Walker Beryl Prospect and Feldspar Mine	Beryllium, Tantalum, Niobium (Columbium), Feldspar		Past Producer	MRDS
Haynes Aggregates - Deep River , Llc	Crushed, Broken Stone NEC	Surface	Intermittent	MSHA
Hood and Smith Sand & Gravel Pit	Sand and Gravel, Construction		Past Producer	MRDS
Hurd Park Quarry	Feldspar	Surface	Past Producer	MRDS
Indian River	Construction Sand and Gravel	Surface	Abandoned	MSHA
Jail Hill Feldspar Quarry	Feldspar	Surface	Past Producer	MRDS
Long Hill Gneiss Quarries	Granite	Surface	Past Producer	MRDS
Metso Lt106(sc20)s/n-77013	Construction Sand and Gravel	Surface	Abandoned	MSHA
Middletown	Construction Sand and Gravel	Surface	Intermittent	MSHA
Markham Mica Mine	Mica		Past Producer	MRDS
Markham Mica Mine	Mica	Surface	Past Producer	MRDS
Maromas Quarries	Stone, Dimension	Surface	Past Producer	MRDS
Maromus Granite Gneiss Rock Quarries	Stone, Dimension		Past Producer	MRDS
Metamorphic Rock Quarry No. Cj-039	Stone		Past Producer	MRDS
Middletown Lead-Silver Mine	Silver, Lead		Past Producer	MRDS
Middletown Lead-Silver Mine	Lead	Surface	Past Producer	MRDS
Middletown Mill	Mica	Processing Plant	Plant	MRDS
Middletown Mine		Underground	Past Producer	MRDS
Mt. Tom Beryl Prospect	Beryllium		Occurrence	MRDS
Mt. Tom Beryl Prospect	Beryllium		Prospect	MRDS
Nus	Construction Sand and Gravel	Surface	Intermittent	MSHA
No Name Given	Nickel		Past Producer	MRDS
Pegmatite Quarries	Feldspar	Surface	Past Producer	MRDS
Pegmatite Quarries	Feldspar	Surface	Past Producer	MRDS
Pegmatite Quarries	Feldspar	Surface	Past Producer	MRDS
Pegmatite Quarry	Feldspar	Surface	Past Producer	MRDS
Pegmatite Quarry	Feldspar	Surface	Past Producer	MRDS
Pegmatite Quarry	Feldspar	Surface	Past Producer	MRDS
Pegmatite Quarry	Feldspar	Surface	Past Producer	MRDS
Pegmatite Quarry	Feldspar	Surface	Past Producer	MRDS
Portland Brownstone Quarries	Flagstone	Surface	Past Producer	MRDS
Quarries	Stone, Dimension	Surface	Past Producer	MRDS
Quarries	Stone, Dimension	Surface	Past Producer	MRDS
Quarry	Stone, Dimension	Surface	Past Producer	MRDS
Quarry	Stone, Dimension	Surface	Past Producer	MRDS
Quarry	Stone, Dimension	Surface	Past Producer	MRDS
Quarry	Stone, Dimension	Surface	Past Producer	MRDS
Quarry	Stone, Dimension	Surface	Past Producer	MRDS
Quarry	Stone, Dimension	Surface	Past Producer	MRDS
Quarry	Stone, Dimension	Surface	Past Producer	MRDS
Reeb Mica Mine	Mica		Past Producer	MRDS
Reeb Mica Mine	Feldspar, Mica	Surface	Prospect	MRDS
Reed Gap Traprock Quarries	Stone, Dimension	Surface	Past Producer	MRDS
Riverside Quarry	Feldspar	Surface	Prospect	MRDS
Roadmetal Quarry	Stone, Crushed/Broken	Surface	Past Producer	MRDS
Roberts Mica Prospect	Feldspar, Mica		Past Producer	MRDS
Roberts Mica Prospect	Feldspar		Prospect	MRDS
Rock Landing Feldspar Quarries	Feldspar		Past Producer	MRDS
Rock Landing Quarry	Feldspar	Surface	Past Producer	MRDS
Sandstone Quarry	Flagstone	Surface	Past Producer	MRDS
Sandstone Quarry	Flagstone	Surface	Past Producer	MRDS
Sawmill Beryl Quarry	Beryllium	Surface	Past Producer	MRDS
Selden Property	Feldspar	Surface	Past Producer	MRDS
Shadow Lane Pit	Sand and Gravel, Construction	Surface	Past Producer	MRDS
Shore Line Concrete Sand Pit	Sand and Gravel, Construction		Past Producer	MRDS
Shoreline Washed Sandstone	Sand and Gravel, Construction	Surface	Past Producer	MRDS
Slater's Feldspar Pegmatite Quarries	Feldspar		Past Producer	MRDS
Slocum Beryl Feldspar Mine	Feldspar		Past Producer	MRDS
Slocum Beryl Prospect	Feldspar	Surface	Past Producer	MRDS
State Forest No. 1 Quarry	Mica	Surface	Prospect	MRDS
State Forest No. 2 Mica Mine	Mica		Past Producer	MRDS
State Forest No. 2 Mica Mine	Mica	Surface	Prospect	MRDS
Stove Street Pit	Sand and Gravel, Construction	Surface	Past Producer	MRDS
Strickland-Cramer Feldspar-Mica Quarries	Tantalum, Niobium (Columbium), Beryllium, Mica, REE, Feldspar		Past Producer	MRDS
Strickland-Cramer Quarry	Mica, Feldspar	Surface-Underground	Past Producer	MRDS
Tollgate Mica-Feldspar Mine	Niobium (Columbium), Feldspar, Mica, Tantalum		Past Producer	MRDS
Tollgate Mica-Feldspar Mine	Feldspar, Mica	Surface-Underground	Prospect	MRDS
Traprock Quarries	Stone, Dimension	Surface	Past Producer	MRDS
Upper Triassic Copper Prospects No. Cj-053	Copper		Occurrence	MRDS
Walden Gem Mine	Gemstone	Surface	Past Producer	MRDS
Western Quarry	Feldspar	Surface	Past Producer	MRDS
Westfield Traprock Quarry	Stone, Dimension	Surface	Past Producer	MRDS
White Rock Pegmatite Quarry	Feldspar	Surface	Past Producer	MRDS
Yard Number 2 Pit	Clay		Past Producer	MRDS