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| Arundel Corporation The | 410-486-8727 | Greenspring Quarry | Pikesville | MD | 21208 |
| Athena-Usa | 410-922-7827 | 3802 Cassandra Rd | Randallstown | MD | 21133 |
| Jones Quarries | 410-461-7199 | Marriottsville Rd | Randallstown | MD | 21133 |
| Maryland Materials Inc | 410-287-8177 | Mechanics Vly Rd | North East | MD | 21901 |
| Piccirilli Quarries | 410-442-1400 | 795 Marriotsville Rd | Glenwood | MD | 21738 |