Browse mineral resources

Katahdin Iron Works

Past Producer • Iron, Sulfur-Pyrite

Andalusite Occurrence

Occurrence •

Portland Monson Slate Co

Past Producer • Slate, Dimension

Haley Construction Inc

Past Producer • Sand and Gravel, Construction

Portland Monson Slate Co

Past Producer • Slate, Dimension

J.L. Bishop

Past Producer • Sand and Gravel, Construction

Boulder Train, Katahdin

Occurrence • Molybdenum

Warren Pit

Producer • Sand and Gravel, Construction

Boston & Maine Quarry

Past Producer • Slate, Dimension

Unnamed Mine

Prospect • Silver

Port. Univ. Crusher Farrin Bros.

Plant • Sand and Gravel, Construction

Unnamed Quarry

Past Producer • Slate, Dimension

Sebec Lake Occurrence

Occurrence • Lead

Burma Quarry

Past Producer • Slate, Dimension

Monson Pond Quarry

Past Producer • Slate, Dimension

Sangerville Pit & Mill

Producer • Sand and Gravel, Construction

Number 5 Mine

Producer • Slate, Dimension

Thomas Quarry

Past Producer • Slate, Dimension

Foss Quarry

Past Producer • Stone, Crushed/Broken

Highland Quarry

Past Producer • Slate, Dimension

Farm Quarry No. 1

Past Producer • Slate, Dimension

Williams Quarry

Past Producer • Slate, Dimension

Unnamed Mine

Occurrence • Gold

Dirigo Quarry

Unknown • Slate, Dimension

Dover-Foxcroft Prospect

Occurrence • Manganese

Underground Quarry

Past Producer • Slate, Dimension

Pine Tree Quarry

Past Producer • Slate, Dimension

Slate Quarry

Past Producer • Slate, Dimension

Lowell Quarry

Past Producer • Slate, Dimension

Monson-Hebron Quarry

Past Producer • Slate, Dimension

Chiastolite Prospect

Occurrence • Kyanite

Cora Quarry

Past Producer • Slate, Dimension

Slate Quarry

Past Producer • Slate, Dimension

Leighton Quarry

Past Producer • Slate, Dimension

Cove Quarry

Past Producer • Slate, Dimension

Unnamed Quarry

Past Producer • Slate, Dimension

Milo Pit

Past Producer • Sand and Gravel, Construction

Unnamed Quarry

Past Producer • Slate, Dimension

Big Kineo Quarry

Past Producer • Slate, Dimension

Farm Quarry No. 2

Past Producer • Slate, Dimension

Brownville Junction Pit

Producer • Sand and Gravel, Construction

West Monson Quarry

Past Producer • Slate, Dimension

Portland Monson Slate Co. Mill

Plant • Slate, Dimension

Blanchard Quarry

Past Producer • Slate, Dimension

Bonded Quarry

Past Producer • Slate, Dimension

Hillside Quarry

Past Producer • Slate, Dimension

Unnamed Quarry

Past Producer • Slate, Dimension

Oakland Quarry

Past Producer • Slate, Dimension

Eastern Quarry

Past Producer • Slate, Dimension

Merrill Quarry

Past Producer • Slate, Dimension

Monson-Maine Quarry

Past Producer • Slate, Dimension

Stanchfield Quarry

Past Producer • Slate, Dimension

Graphite Occurrence

Occurrence • Graphite

Farm Quarries Nos. 3 & 4

Past Producer • Slate, Dimension

Forest Quarry

Past Producer • Slate, Dimension

Cement Pit Quarry

Past Producer • Slate, Dimension

Weston Farm Prospect

Prospect • Copper

Foss Quarry

Past Producer • Stone, Crushed/Broken

Imperial Quarry

Unknown • Slate, Dimension

Katahdin Pyrrhotite Deposit

Past Producer • Sulfur

Eureka Quarry

Past Producer • Slate, Dimension

Queen City Quarry

Past Producer • Granite

Wilkens Quarry

Past Producer • Slate, Dimension

Old Granite Quarry

Past Producer • Granite

Foss Farms Prospect

Unknown •

Weston Quarry

Past Producer • Stone, Crushed/Broken

Number 2 Mine

Past Producer • Slate, Dimension

Brownville Quarry

Past Producer • Slate, Dimension

General Slate Co. Quarry

Past Producer • Slate, Dimension

Spalding Herrick Pit

Producer • Sand and Gravel, Construction

Bennet Mine

Past Producer • Zinc

Unnamed Mine

Prospect • Silver

Moosehead Quarry

Past Producer • Slate, Dimension

Brawn Quarry

Past Producer • Granite

Priestly Lake

Occurrence • Molybdenum

Ross Cove Prospect

Occurrence • Zinc