Bridge to Bay Alliance (Baulderstone Hornibrook).
Project: Seabed cable identification and mapping of pier footprint for new bridge.
Duties:
- Survey footprint for proposed bridge piers.
- Install double sediment control boom to contain any materials that are disturbed during excavation at the site.
- Assist with water monitoring upstream and down stream of the excavation site.
- Excavate using water jet and induction dredge a trench 3m wide and 1.5m deep to expose communication cables in the vicinity of the bridge footprints.
- Remove major debris that may effect pipe driving in the footprint area.
- Survey position of cables and debris.
- All diving carried out in contaminated protection suits and sealed mask to prevent exposure to contaminated seabed materials that may be present.
- Job completed on time and to the satisfaction of the Bridge to Bay Alliance (Baulderstone Hornibrook)
Diver dressed in contaminated diving protection suit and dive mask.
Silt containment boom installed from surface to seabed around 17m length excavation trench