Checked
Mines in Connecticut
Mines reported to the Mine Safety and Health Administration
- Mines listed
- 111
- Active
- 43
- Employees
- 577
- Accidents reported in 2025
- 5
Mines are listed from MSHA's mine data, excluding mines recorded as abandoned. Accident counts are reports filed with MSHA for the calendar year, including injuries and illnesses at the mine, and are counts only. Operator names are shown only when they are companies or agencies.
Largest mines by employees
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| Mine | Type | Status | Employees | Accidents 2025 |
|---|---|---|---|---|
| North Branford Quarry | Metal/nonmetal, Surface | Active | 40 | 0 |
| Canaan | Metal/nonmetal, Surface | Active | 33 | 0 |
| Galasso Materials LLC | Metal/nonmetal, Surface | Active | 29 | 0 |
| Getty Granite Salem | Metal/nonmetal, Surface | Active | 23 | 0 |
| New Britain Quarry | Metal/nonmetal, Surface | Active | 23 | 2 |
| Quarry No 2 Southbury | Metal/nonmetal, Surface | Active | 16 | 1 |
| York Hill Mine & Mill | Metal/nonmetal, Surface | Active | 15 | 1 |
| Burns Portable Plant | Metal/nonmetal, Surface | Intermittent | 13 | 0 |
| New Milford Plant | Metal/nonmetal, Surface | Active | 12 | 0 |
| Allyndale Corporation | Metal/nonmetal, Surface | Active | 11 | 0 |
| Haynes Aggregates - Seymour LLC | Metal/nonmetal, Surface | Intermittent | 11 | 0 |
| Waterbury Quarry | Metal/nonmetal, Surface | Active | 10 | 0 |
| Stony Creek | Metal/nonmetal, Surface | Active | 9 | 0 |
| Pearl Lake Road Pit & Mill | Metal/nonmetal, Surface | Intermittent | 8 | 0 |
| Route 74 Plant | Metal/nonmetal, Surface | Active | 8 | 0 |
| Rawson Plant #3 | Metal/nonmetal, Surface | Active | 8 | 0 |
| Skyline Quarry | Metal/nonmetal, Surface | Active | 8 | 0 |
| Tower Hill Granite | Metal/nonmetal, Surface | Active | 8 | 0 |
| Pit 1 | Metal/nonmetal, Surface | Active | 7 | 0 |
| Plant 2 | Metal/nonmetal, Surface | Active | 7 | 0 |
| East Canaan Pit & Mill | Metal/nonmetal, Surface | Active | 6 | 0 |
| Granby Notch Pit | Metal/nonmetal, Surface | Intermittent | 6 | 0 |
| Hain Materials Corp | Metal/nonmetal, Surface | Active | 6 | 0 |
| John J. Brennan Const. Co. Inc. | Metal/nonmetal, Surface | Active | 6 | 0 |
| Portable 300 | Metal/nonmetal, Surface | Intermittent | 6 | 0 |
| Segalla Sand & Gravel, Inc | Metal/nonmetal, Surface | Active | 6 | 0 |
| Stafford Sand and Gravel LLC | Metal/nonmetal, Surface | Intermittent | 6 | 0 |
| Bogue Mill | Metal/nonmetal, Surface | Intermittent | 5 | 0 |
| Brickyard Pit and Mill | Metal/nonmetal, Surface | Active | 5 | 1 |
| Century Aggregates Sand Road Mine | Metal/nonmetal, Surface | Active | 5 | 0 |
| Desiato Pit and Mill | Metal/nonmetal, Surface | Active | 5 | 0 |
| Danielson Pit & Mill | Metal/nonmetal, Surface | Active | 5 | 0 |
| Plant 1 | Metal/nonmetal, Surface | Active | 5 | 0 |
| Rawson Materials - Plant 5 | Metal/nonmetal, Surface | Active | 5 | 0 |
| Split Rock | Metal/nonmetal, Surface | Active | 5 | 0 |
| Sansoucy Quarries Inc. | Metal/nonmetal, Surface | Intermittent | 5 | 0 |
| Adelman Sand & Gravel Inc | Metal/nonmetal, Surface | Intermittent | 4 | 0 |
| Barnes Concrete Co Inc | Metal/nonmetal, Surface | Active | 4 | 0 |
| Chapman Crushing Service Inc | Metal/nonmetal, Surface | Intermittent | 4 | 0 |
| Chicken Hill | Metal/nonmetal, Surface | Intermittent | 4 | 0 |
| Defeo Portable Plant | Metal/nonmetal, Surface | Active | 4 | 0 |
| GF Plant | Metal/nonmetal, Surface | Intermittent | 4 | 0 |
| Geer Sand & Gravel | Metal/nonmetal, Surface | Intermittent | 4 | 0 |
| Middletown | Metal/nonmetal, Surface | Intermittent | 4 | 0 |
| McClure Sand & Gravel | Metal/nonmetal, Surface | Active | 4 | 0 |
| Nus | Metal/nonmetal, Surface | Intermittent | 4 | 0 |
| Plant 4 - Plainfield | Metal/nonmetal, Surface | Active | 4 | 0 |
| Portable Jaw | Metal/nonmetal, Surface | Active | 4 | 0 |
| Ramp Road Plant | Metal/nonmetal, Surface | Intermittent | 4 | 0 |
| SAMMY P Inc | Metal/nonmetal, Surface | Intermittent | 4 | 0 |
| William Coon & Son, Inc | Metal/nonmetal, Surface | Intermittent | 4 | 0 |
| Willow Spring Farm | Metal/nonmetal, Surface | Active | 4 | 0 |
| AJ Resources | Metal/nonmetal, Surface | Intermittent | 3 | 0 |
| Beacon Falls Quarry | Metal/nonmetal, Surface | Active | 3 | 0 |
| Caroline Rd Pit | Metal/nonmetal, Surface | Intermittent | 3 | 0 |
| Century Acquisitions | Metal/nonmetal, Surface | Active | 3 | 0 |
| Desjardins Sand & Gravel | Metal/nonmetal, Surface | Active | 3 | 0 |
| Ellington Pit | Metal/nonmetal, Surface | Intermittent | 3 | 0 |
| French River Materials | Metal/nonmetal, Surface | Active | 3 | 0 |
| Glastonbury | Metal/nonmetal, Surface | Intermittent | 3 | 0 |
| Goliath-7 | Metal/nonmetal, Surface | Intermittent | 3 | 0 |
| Griswold Sand & Gravel | Metal/nonmetal, Surface | Intermittent | 3 | 0 |
| Haynes Quarry | Metal/nonmetal, Surface | Intermittent | 3 | 0 |
| Jewett City | Metal/nonmetal, Surface | Intermittent | 3 | 0 |
| Lisbon Pit & Plant | Metal/nonmetal, Surface | Temporarily Idled | 3 | 0 |
| Lisbon Sand & Gravel LLC | Metal/nonmetal, Surface | Intermittent | 3 | 0 |
| O & G Prospect Quarry #3 | Metal/nonmetal, Surface | Intermittent | 3 | 0 |
| Portable Crusher #1 | Metal/nonmetal, Surface | Intermittent | 3 | 0 |
| Portable Crusher #2 | Metal/nonmetal, Surface | Intermittent | 3 | 0 |
| Portable Crusher #3 | Metal/nonmetal, Surface | Intermittent | 3 | 0 |
| Portable Crusher #4 | Metal/nonmetal, Surface | Intermittent | 3 | 0 |
| Powerscreen Warrior 43.566616 | Metal/nonmetal, Surface | Intermittent | 3 | 0 |
| Pegson Metro-Traxx 2436 | Metal/nonmetal, Surface | Intermittent | 3 | 0 |
| Polinsky Farm LLC | Metal/nonmetal, Surface | Intermittent | 3 | 0 |
| Portable Crusher #8 | Metal/nonmetal, Surface | Intermittent | 3 | 0 |
| Portable Division | Metal/nonmetal, Surface | Intermittent | 3 | 0 |
| Quarry No 1-Woodbury | Metal/nonmetal, Surface | Active | 3 | 0 |
| Richard P Baldi Jr | Metal/nonmetal, Surface | Intermittent | 3 | 0 |
| Union Pit #2 | Metal/nonmetal, Surface | Intermittent | 3 | 0 |
| Windham Materials LLC | Metal/nonmetal, Surface | Active | 3 | 0 |
| Andrew Ansaldi Company | Metal/nonmetal, Surface | Intermittent | 2 | 0 |
| Beacon Falls Wash Plant #2 | Metal/nonmetal, Surface | Intermittent | 2 | 0 |
| John J Brennan Const Co #267 Portable Metso Crushe | Metal/nonmetal, Surface | Intermittent | 2 | 0 |
| K & H Construction Mine | Metal/nonmetal, Surface | Intermittent | 2 | 0 |
| Liberty Hill Quarry | Metal/nonmetal, Surface | Intermittent | 2 | 0 |
| Miller Brothers | Metal/nonmetal, Surface | Intermittent | 2 | 0 |
| Oneco Gravel LLC | Metal/nonmetal, Surface | Intermittent | 2 | 0 |
| Osga Pit | Metal/nonmetal, Surface | Intermittent | 2 | 0 |
| Pine Valley Materials, LLC | Metal/nonmetal, Surface | Intermittent | 2 | 0 |
| Portable Crusher | Metal/nonmetal, Surface | Intermittent | 2 | 0 |
| Portable Crusher #6 | Metal/nonmetal, Surface | Intermittent | 2 | 0 |
| Portable Crusher #7 | Metal/nonmetal, Surface | Intermittent | 2 | 0 |
| Portable Pegson Crusher | Metal/nonmetal, Surface | Intermittent | 2 | 0 |
| Powerscreen Chiefton 1700x | Metal/nonmetal, Surface | Intermittent | 2 | 0 |
| Wallingford Quarry | Metal/nonmetal, Surface | Active | 2 | 0 |
| 81 IPR | Metal/nonmetal, Surface | Active | 1 | 0 |
| Arnio Mine | Metal/nonmetal, Surface | Intermittent | 1 | 0 |
| Burrville Quarry | Metal/nonmetal, Surface | Intermittent | 1 | 0 |
| Holden Brothers LLC | Metal/nonmetal, Surface | Intermittent | 1 | 0 |
| Haynes Aggregates - Deep River , LLC | Metal/nonmetal, Surface | Intermittent | 1 | 0 |
| Mine 1 | Metal/nonmetal, Surface | Intermittent | 1 | 0 |
| N.H.D. Pit | Metal/nonmetal, Surface | Intermittent | 1 | 0 |
| Powerscreen Chieftain 88.574023 | Metal/nonmetal, Surface | Intermittent | 1 | 0 |
| Route 32 Plant | Metal/nonmetal, Surface | Active | 1 | 0 |
| Tall Pines Pit #1 | Metal/nonmetal, Surface | Intermittent | 1 | 0 |
| Tilcon Newington Quarry | Metal/nonmetal, Surface | Intermittent | 1 | 0 |
| Winsted Quarry | Metal/nonmetal, Surface | Intermittent | 1 | 0 |
| Waskiewicz Pit & Plant | Metal/nonmetal, Surface | Intermittent | 1 | 0 |
Other mines
No employees reported
- Metso LT106 Jaw · Temporarily Idled
- Renz Quarry Products · Temporarily Idled
- Waterville Materials · Temporarily Idled
Source: Mine Safety and Health Administration, Open Government Data
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