| 925.17 Civil Engineering |
| 925.28 Drainage Engineering |
| 925.33 Engineer Services, Professional |
| 925.35 Environmental Engineering |
| 925.36 Engineering Services (Not Otherwise Classified) |
| 925.49 Highways; Streets; Airport Pay-Parking Lots - Engineering |
| 925.61 Land Development and Planning/Engineering |
| 925.83 Sanitary Engineering |
| 925.93 Traffic and Transportation Engineering |
| 925.97 Water Supply, Treatment, and Distribution/Engineering |