Mines in Piscataquis County, Maine
85Total
6Active
Piscataquis County, Maine has 85 mine and mineral deposit locations documented in federal records from the USGS Mineral Resources Data System and MSHA. 6 are currently active mining operations. The most commonly recorded commodity is slate, dimension, with 46 sites.
By Status
Past Producer · 54Occurrence · 9Producer · 5Intermittent · 4Abandoned · 4Unknown · 3Prospect · 3Plant · 2Active · 1
Top Commodities
Slate, Dimension · 46Sand and Gravel, Construction · 8Construction Sand and Gravel · 8Stone, Crushed/Broken · 3Granite · 3Zinc · 2Silver · 2Molybdenum · 2
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Active Mines in Piscataquis County
| Mine | Operator | Commodity | Type | Status |
|---|---|---|---|---|
| Gerrish Pit | Earl Gerrish & Sons Inc | Construction Sand and Gravel | Surface | Active |
| Brownville Junction Pit | — | Sand and Gravel, Construction | Surface | Producer |
| Number 5 Mine | — | Slate, Dimension | Underground | Producer |
| Sangerville Pit & Mill | — | Sand and Gravel, Construction | Surface | Producer |
| Spalding Herrick Pit | — | Sand and Gravel, Construction | Surface | Producer |
| Warren Pit | — | Sand and Gravel, Construction | Surface | Producer |
All Mines in Piscataquis County
| Mine | Commodity | Type | Status | Source |
|---|---|---|---|---|
| Gerrish Pit | Construction Sand and Gravel | Surface | Active | MSHA |
| Brownville Junction Pit | Sand and Gravel, Construction | Surface | Producer | MRDS |
| Number 5 Mine | Slate, Dimension | Underground | Producer | MRDS |
| Sangerville Pit & Mill | Sand and Gravel, Construction | Surface | Producer | MRDS |
| Spalding Herrick Pit | Sand and Gravel, Construction | Surface | Producer | MRDS |
| Warren Pit | Sand and Gravel, Construction | Surface | Producer | MRDS |
| Andalusite Occurrence | Occurrence | MRDS | ||
| Bennet Mine | Zinc | Underground | Past Producer | MRDS |
| Big Kineo Quarry | Slate, Dimension | Surface | Past Producer | MRDS |
| Blanchard Quarry | Slate, Dimension | Surface | Past Producer | MRDS |
| Bonded Quarry | Slate, Dimension | Surface | Past Producer | MRDS |
| Boston & Maine Quarry | Slate, Dimension | Surface | Past Producer | MRDS |
| Boulder Train, Katahdin | Molybdenum | Occurrence | MRDS | |
| Brawn Quarry | Granite | Surface | Past Producer | MRDS |
| Brownville Junction Pit and Mill | Construction Sand and Gravel | Surface | Abandoned | MSHA |
| Brownville Quarry | Slate, Dimension | Surface | Past Producer | MRDS |
| Burma Quarry | Slate, Dimension | Surface | Past Producer | MRDS |
| Cement Pit Quarry | Slate, Dimension | Surface | Past Producer | MRDS |
| Chiastolite Prospect | Kyanite | Occurrence | MRDS | |
| Cora Quarry | Slate, Dimension | Surface | Past Producer | MRDS |
| Cove Quarry | Slate, Dimension | Surface | Past Producer | MRDS |
| Dirigo Quarry | Slate, Dimension | Unknown | MRDS | |
| Dover-Foxcroft Prospect | Manganese | Occurrence | MRDS | |
| Eastern Quarry | Slate, Dimension | Surface | Past Producer | MRDS |
| Eureka Quarry | Slate, Dimension | Surface | Past Producer | MRDS |
| Farm Quarries Nos. 3 & 4 | Slate, Dimension | Surface | Past Producer | MRDS |
| Farm Quarry No. 1 | Slate, Dimension | Surface | Past Producer | MRDS |
| Farm Quarry No. 2 | Slate, Dimension | Surface | Past Producer | MRDS |
| Forest Quarry | Slate, Dimension | Surface | Past Producer | MRDS |
| Foss Farms Prospect | Underground | Unknown | MRDS | |
| Foss Quarry | Stone, Crushed/Broken | Surface | Past Producer | MRDS |
| Foss Quarry | Stone, Crushed/Broken | Surface | Past Producer | MRDS |
| General Slate Co. Quarry | Slate, Dimension | Surface | Past Producer | MRDS |
| Graphite Occurrence | Graphite | Occurrence | MRDS | |
| Haley Construction Inc | Sand and Gravel, Construction | Past Producer | MRDS | |
| Highland Quarry | Slate, Dimension | Surface | Past Producer | MRDS |
| Hillside Quarry | Slate, Dimension | Surface | Past Producer | MRDS |
| Imperial Quarry | Slate, Dimension | Unknown | MRDS | |
| J.l. Bishop | Sand and Gravel, Construction | Past Producer | MRDS | |
| Katahdin Iron Works | Iron, Sulfur-Pyrite | Past Producer | MRDS | |
| Katahdin Pyrrhotite Deposit | Iron, Sulfur | Surface | Past Producer | MRDS |
| Lm Pit | Construction Sand and Gravel | Surface | Intermittent | MSHA |
| Leighton Quarry | Slate, Dimension | Surface | Past Producer | MRDS |
| Lowell Quarry | Slate, Dimension | Surface | Past Producer | MRDS |
| Merrill Quarry | Slate, Dimension | Surface | Past Producer | MRDS |
| Milo Pit | Sand and Gravel, Construction | Surface | Past Producer | MRDS |
| Milo Pit | Construction Sand and Gravel | Surface | Abandoned | MSHA |
| Monson Pond Quarry | Slate, Dimension | Surface | Past Producer | MRDS |
| Monson-Hebron Quarry | Slate, Dimension | Surface | Past Producer | MRDS |
| Monson-Maine Quarry | Slate, Dimension | Surface | Past Producer | MRDS |
| Moosehead Quarry | Slate, Dimension | Surface | Past Producer | MRDS |
| Number 2 Mine | Slate, Dimension | Underground | Past Producer | MRDS |
| O'Brien & Sons | Construction Sand and Gravel | Surface | Intermittent | MSHA |
| Oakland Quarry | Slate, Dimension | Surface | Past Producer | MRDS |
| Old Granite Quarry | Granite | Surface | Past Producer | MRDS |
| Pine Tree Quarry | Slate, Dimension | Surface | Past Producer | MRDS |
| Port. Univ. Crusher Farrin Bros. | Sand and Gravel, Construction | Processing Plant | Plant | MRDS |
| Portable Plant | Construction Sand and Gravel | Surface | Intermittent | MSHA |
| Portable Screen | Construction Sand and Gravel | Surface | Intermittent | MSHA |
| Portland Monson Slate Co | Slate, Dimension | Past Producer | MRDS | |
| Portland Monson Slate Co | Slate, Dimension | Past Producer | MRDS | |
| Portland Monson Slate Co. Mill | Slate, Dimension | Processing Plant | Plant | MRDS |
| Priestly Lake | Molybdenum | Occurrence | MRDS | |
| Queen City Quarry | Granite | Surface | Past Producer | MRDS |
| Ross Cove Prospect | Zinc | Occurrence | MRDS | |
| Sangerville Pit and Mill | Construction Sand and Gravel | Surface | Abandoned | MSHA |
| Sangerville Portable | Crushed, Broken Stone NEC | Surface | Abandoned | MSHA |
| Sebec Lake Occurrence | Lead | Occurrence | MRDS | |
| Slate Quarry | Slate, Dimension | Surface | Past Producer | MRDS |
| Slate Quarry | Slate, Dimension | Surface | Past Producer | MRDS |
| Stanchfield Quarry | Slate, Dimension | Surface | Past Producer | MRDS |
| Thomas Quarry | Slate, Dimension | Surface | Past Producer | MRDS |
| Underground Quarry | Slate, Dimension | Surface-Underground | Past Producer | MRDS |
| Unnamed Mine | Silver | Prospect | MRDS | |
| Unnamed Mine | Gold | Occurrence | MRDS | |
| Unnamed Mine | Silver | Prospect | MRDS | |
| Unnamed Quarry | Slate, Dimension | Surface | Past Producer | MRDS |
| Unnamed Quarry | Slate, Dimension | Surface | Past Producer | MRDS |
| Unnamed Quarry | Slate, Dimension | Surface | Past Producer | MRDS |
| Unnamed Quarry | Slate, Dimension | Surface | Past Producer | MRDS |
| West Monson Quarry | Slate, Dimension | Surface | Past Producer | MRDS |
| Weston Farm Prospect | Copper | Prospect | MRDS | |
| Weston Quarry | Stone, Crushed/Broken | Surface | Past Producer | MRDS |
| Wilkens Quarry | Slate, Dimension | Surface | Past Producer | MRDS |
| Williams Quarry | Slate, Dimension | Surface | Past Producer | MRDS |