| 910.63 Public Utilities: Water, Sewer and Gas Maintenance and Repair |
| 912.23 Construction, General (Backfill Services, Digging, Ditching, Road Grading, Rock Stabilization, etc.) |
| 913.56 Construction, Utility/Underground Projects |
| 914.27 Carpentry |
| 914.30 Concrete |
| 914.50 Heating, Ventilating and Air Conditioning (HVAC) |
| 914.53 Insulation |
| 914.55 Masonry |
| 914.58 Metal Work |
| 914.61 Painting and Wallpapering |
| 914.64 Plastering |
| 914.65 Plastics |
| 914.73 Roofing and Siding |
| 914.84 Trade Services, Construction (Not Otherwise Classified) |
| 958.95 Utility Management Services |