| 21232 |
Construction projects involving water resources (e.g., dredging and land drainage)--are classified in Industry 23799, Other Heavy and Civil Engineering Construction. |
| 212321 |
Mining industrial grade sand--are classified in U.S. Industry 212322, Industrial Sand Mining |
| 212321 |
Manufacturing ready-mix concrete--are classified in Industry 327320, Ready-Mix Concrete Manufacturing |
| 212321 |
Construction projects involving water resources (e.g., dredging and land drainage)--are classified in Industry 237990, Other Heavy and Civil Engineering Construction. |
| 212322 |
Mining commercial (i.e., construction) grade gravel--are classified in U.S. Industry 212321, Construction Sand and Gravel Mining |
| 212322 |
Construction projects involving water resources (e.g., dredging and land drainage)--are classified in Industry 237990, Other Heavy and Civil Engineering Construction. |
| 212323 |
Shaping, molding, glazing, and firing pottery, ceramics, and plumbing fixtures--are classified in Industry 327110, Pottery, Ceramics, and Plumbing Fixture Manufacturing |
| 212323 |
Shaping, molding, baking, burning, or hardening clay and nonclay refractories, and structural clay products--are classified in Industry 327120, Clay Building Material and Refractories Manufacturing |
| 212323 |
Calcining, dead burning, or otherwise processing (i.e., beyond basic preparation) clay or ceramic and refractory minerals--are classified in U.S. Industry 327992, Ground or Treated Mineral and Earth Manufacturing |
| 212323 |
Oil shale mining and/or beneficiating--are classified in Industry 211120, Crude Petroleum Extraction. |