Across
- 5. The name for the channel on top of the bridge
- 6. The name for Roman concrete
- 7. The name of the river the bridge spans
- 8. The bridge has 11 of these in the middle tier
Down
- 1. The stone mainly used in construction
- 2. The Roman Emperor who ruled during construction
- 3. A what world heritage site
- 4. The last stone added when building an arch
- 8. a pipe or channel used for carrying water from one place to another