Mines and quarries in New Haven County, CT
15 mines not abandoned in New Haven County, CT, in the MSHA file of October 2, 2026.
| Mine | Mine ID | Industry group | Status since |
|---|---|---|---|
| BEACON FALLS QUARRY WSS HOLDINGS LLC | 0600850 | Stone | Jul 10, 2026 |
| Beacon Falls Wash Plant #2 O & G Industries Inc | 0600367 | Sand and gravel | Sep 21, 2026 |
| DEFEO PORTABLE PLANT Defeo Materials LLC | 0600848 | Stone | Jun 9, 2026 |
| GOLIATH-7 Guerrera Construction Company Inc | 0600676 | Stone | Jun 23, 2025 |
| HAYNES AGGREGATES - SEYMOUR LLC Haynes Materials Company | 0600763 | Stone | Mar 25, 2024 |
| North Branford Quarry Tilcon Connecticut Inc | 0600012 | Stone | Mar 11, 1994 |
| O & G PROSPECT QUARRY #3 O & G INDUSTRIES INC | 0600259 | Stone | Jun 5, 2025 |
| PEARL LAKE ROAD PIT & MILL Tony Calabro Sons Inc | 0600200 | Stone | Jul 23, 2026 |
| Quarry No 2 Southbury O & G Industries Inc | 0600295 | Stone | Mar 16, 1994 |
| SPLIT ROCK F&F MATERIALS, LLC | 0600853 | Stone | Jul 10, 2026 |
| STONY CREEK STONY CREEK QUARRY CORPORATION | 0600005 | Stone | Jan 29, 2010 |
| Wallingford Quarry Tilcon Connecticut Inc | 0600013 | Stone | Mar 2, 1994 |
| WATERBURY QUARRY WSS HOLDINGS LLC | 0600761 | Stone | Jul 10, 2026 |
| WATERVILLE MATERIALS LEVEL DEVELOPMENT CORPORATION | 0600791 | Stone | Jul 16, 2025 |
| YORK HILL MINE & MILL THE YORK HILL TRAP ROCK QUARRY COMPANY, INC. | 0600026 | Stone | Oct 5, 1994 |
Alphabetical order — this site ranks no one. Mines that are not abandoned in the MSHA file of October 2, 2026. Sole proprietors are found by mine ID only. How to read this.