# 2.2 Sand & Gravel Plants

### Process:

1. Excavate or dredge
2. Wash material
3. Screen material
4. Separate sand vs gravel
5. Stockpile products

### Key Differences vs Quarries:

- Messier sites
- Poor pile definition
- Moisture variability
- Often near rivers
- Heavy wash plant infrastructure

### Drone Applications:

- Wet sand volume
- Multi-product tracking
- Dredge progression
- Wash plant feed tracking