Mines in Montgomery County, Maryland
56Total
12Active
Montgomery County, Maryland has 56 mine and mineral deposit locations documented in federal records from the USGS Mineral Resources Data System and MSHA. 12 are currently active mining operations. The most commonly recorded commodity is gold, with 26 sites.
By Status
Past Producer · 42Producer · 10Active · 2Occurrence · 1Abandoned · 1
Top Commodities
Gold · 26Stone, Dimension · 9Stone, Crushed/Broken · 4Stone · 2Sand and Gravel, Construction · 2Mica · 2Manganese · 2Feldspar · 2
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Active Mines in Montgomery County
| Mine | Operator | Commodity | Type | Status |
|---|---|---|---|---|
| Amrize Rockville Quarry | Amrize Mid-Atlantic Inc. | Crushed, Broken Granite | Surface | Active |
| Carderock Quarries | Tri-State Stone & Building Supply Inc. | Crushed, Broken Stone NEC | Surface | Active |
| B Giancola Quarry | — | Mica | Surface | Producer |
| B. Giancola Quarry | — | Stone, Crushed/Broken | — | Producer |
| Rockville Crushed Stone | — | Stone, Crushed/Broken | Surface | Producer |
| Rockville Crushed Stone Co. Quarry | — | Stone, Crushed/Broken | — | Producer |
| Stoneyhurst Quarry Number 1 | — | Stone, Dimension | — | Producer |
| Stoneyhurst Quarry Number 3 | — | Stone, Dimension | — | Producer |
| Stonyhurst Quarries | — | Stone | Surface | Producer |
| Toms Run Quarry | — | Silica | — | Producer |
| Tri-State Stone Co. Quarry | — | Stone, Dimension | Surface | Producer |
| Tri-State Stone Company Quarry | — | Stone, Dimension | — | Producer |
All Mines in Montgomery County
| Mine | Commodity | Type | Status | Source |
|---|---|---|---|---|
| Amrize Rockville Quarry | Crushed, Broken Granite | Surface | Active | MSHA |
| Carderock Quarries | Crushed, Broken Stone NEC | Surface | Active | MSHA |
| B Giancola Quarry | Mica | Surface | Producer | MRDS |
| B. Giancola Quarry | Stone, Crushed/Broken | Producer | MRDS | |
| Rockville Crushed Stone | Stone, Crushed/Broken | Surface | Producer | MRDS |
| Rockville Crushed Stone Co. Quarry | Stone, Crushed/Broken | Producer | MRDS | |
| Stoneyhurst Quarry Number 1 | Stone, Dimension | Producer | MRDS | |
| Stoneyhurst Quarry Number 3 | Stone, Dimension | Producer | MRDS | |
| Stonyhurst Quarries | Stone | Surface | Producer | MRDS |
| Toms Run Quarry | Silica | Producer | MRDS | |
| Tri-State Stone Co. Quarry | Stone, Dimension | Surface | Producer | MRDS |
| Tri-State Stone Company Quarry | Stone, Dimension | Producer | MRDS | |
| Bethesda Mine | Gold | Past Producer | MRDS | |
| Bethesda Mine | Gold | Past Producer | MRDS | |
| Bethesda Mine | Gold | Past Producer | MRDS | |
| Bogley Mine | Gold | Past Producer | MRDS | |
| Bogley Mine | Gold | Underground | Past Producer | MRDS |
| Brookville Mine | Manganese | Surface | Past Producer | MRDS |
| Eagle Mine | Gold | Underground | Past Producer | MRDS |
| Earth Products Company Mines | Feldspar | Surface | Past Producer | MRDS |
| Earth Products Company Quarries | Feldspar | Surface | Past Producer | MRDS |
| Ellicott Mine | Gold | Past Producer | MRDS | |
| Etchison Mine | Underground | Past Producer | MRDS | |
| Etchison Mine & Lyde Griffith Property | Chromium | Past Producer | MRDS | |
| Ford Mine | Gold | Underground | Past Producer | MRDS |
| Gilmore Mine | Mica | Surface-Underground | Past Producer | MRDS |
| Griffith Mine | Underground | Past Producer | MRDS | |
| Harrison Mine | Gold | Past Producer | MRDS | |
| Harrison Mine | Gold | Past Producer | MRDS | |
| Huddleston Mine | Gold | Past Producer | MRDS | |
| Huddleston Mine | Gold | Underground | Past Producer | MRDS |
| Irma Mine | Gold | Past Producer | MRDS | |
| Lynch Mine | Gold | Past Producer | MRDS | |
| Lynch Mine | Gold | Past Producer | MRDS | |
| Maryland Mine | Gold | Past Producer | MRDS | |
| Maryland Mine | Gold | Past Producer | MRDS | |
| McCeney Pit | Sand and Gravel, Construction | Surface | Past Producer | MRDS |
| McCeney Pit and Plant | Sand and Gravel, Construction | Past Producer | MRDS | |
| Miller Mine | Gold | Underground | Past Producer | MRDS |
| Montgomery Mine | Gold | Past Producer | MRDS | |
| Montgomery Mine | Gold | Underground | Past Producer | MRDS |
| Rock Run Gold Placers | Gold | Occurrence | MRDS | |
| Rock Run Gold Placers | Gold | Placer | Past Producer | MRDS |
| Rockville Plant | Stone, Crushed/Broken | Processing Plant | Past Producer | MRDS |
| Sawyer Mine | Gold | Past Producer | MRDS | |
| Sawyer Mine | Gold | Past Producer | MRDS | |
| Sawyer Mine & 5 Additional Mines | Gold | Past Producer | MRDS | |
| Stoneyhurst Quarries, Inc. | Dimension Stone NEC | Surface | Abandoned | MSHA |
| Stoneyhurst Quarry Number 1 | Stone, Dimension | Surface | Past Producer | MRDS |
| Stoneyhurst Quarry Number 3 | Stone, Dimension | Surface | Past Producer | MRDS |
| Stonyhurst Quarries | Stone | Past Producer | MRDS | |
| Toms Run Quarry | Stone, Dimension | Surface | Past Producer | MRDS |
| Unnamed Schist Quarry | Stone, Dimension | Surface | Past Producer | MRDS |
| Unnamed Schist Quarry Near Cabin John Park | Stone, Dimension | Past Producer | MRDS | |
| Unnamed, Near Brookville | Manganese | Past Producer | MRDS | |
| Watson Mine | Gold | Underground | Past Producer | MRDS |