Preston 7 UID’s

Contract Works:

- Shaft 5, Caisson wrap shaft (7.5m ø – 25m deep).

- Shaft 6, Caisson wrap shaft (10.5m ø – 25m deep).

- Debris Chamber, Caisson wrap shaft (5.5m ø – 10m deep).

- Shaft 1 Portal eyes.

- Tunneling labour supply.

- Shaft C4 – C8 (3.05m ø – 1.0km).

- Shaft S1 – S4 (3.05m ø – 2.2km).