1. Martin Marietta Aggregates 1636 Marietta Rd, Ely, IA 52227 Coordinate: 41.91645,-91.52317 Phone: (319) 848-4157
2. Martin Marietta Aggregates 6580 Old River Rd, Ely, IA 52227 Coordinate: 41.94233,-91.56677 Phone: (319) 848-9040