Our earliest colonial era boat?

The well-preserved remains of a boat were unearthed in November 2018, during Sydney Metro’s excavation of Barangaroo Station, at the historic site of a shipyard. Preliminary timber identification analysis revealed an exclusive use of Australian timber species in the construction of the boat. The type of construction is known as clinker, where the planks are laid first, and slightly overlap each other, and the frames are added later.

The discovery is deemed one of national significance as the boat is believed to be one of the oldest colonial Australian-built craft to be fully excavated, recorded and raised.

The Barangaroo Boat, as it is now known, has the potential to reveal rare information on colonial shipbuilding techniques and the adaptive use of native Australian timber in European construction traditions. Under Sydney Metro planning approval conditions, a rescue excavation was undertaken. See the excavation, hear from the field archaeologists and understand more about the site here.


Excavating the Barangaroo Boat

Excavating the Barangaroo Boat

The boat was excavated and painstakingly recorded in-situ. Before being methodically dismantled, positional information of each timber was recorded in the overall structure of the boat. Once each timber had been removed from its resting place, it was individually recorded in more detail. Then the timbers were carefully wrapped to retain moisture, and secured to rigid boards for transportation and storage. This also prevented warping. All timbers were stored in refrigerated containers to slow and prevent biological activity.

As work progressed maritime archaeologists were able to form some preliminary theories about the vessel, drawn from each piece of timber they uncovered. It appears that the builders of the boat were accomplished woodworkers, but idiosyncratic features such as irregular fastening size and materials used, point towards less experienced shipbuilders, or perhaps those with limited sources of materials.

It is exciting to continue exploring the construction, potential use and life of the boat as well as get a rare glimpse into the early life of the colony, as we progress through the conservation phase.


Recording and conserving the boat hull timers

Recording & Conserving the Timbers

The new phase in the story of the Barangaroo Boat is conservation of all its timbers. In order to undertake this phase, Sydney Metro worked closely with the Silentworld Foundation to develop a detailed project design for the professional documentation and conservation of the boat hull structural elements. The Sydney Metro shipwreck conservation facility was set up to provide a purpose specific platform to undertake this work.

How is it done?

The team must follow a sequence of steps in order to remove the timbers from their cold storage, record them in detail, then prepare them for treatment and finally place the timbers in tanks for conservation.

  • Unwrap and clean timber
    → excavated timbers retained sediment on their surface which must be removed as it can harbour bacteria and fungus
  • Record timber to the highest level possible
    → the team used a structure light scanner to record each cleaned timber to high resolution – the resulting 3D digital models are annotated using CAD software in order to point out specific features
  • Pretreatment – removing excess iron
    → recorded timbers treated in order to remove excess iron deposited on/in the timbers by the iron nails used in its construction 
  • Treatment – impregnating the timbers with PEG wax
    → polyethylene glycol is a liquid wax – it will replace the water in the cells of waterlogged wood hence providing rigidity when the wood is dried

In this very exciting phase, the Silentworld Foundation and Sydney Metro team are working with York Archaeological Trust and Ubi3D, with collaborative support from the Australian National Maritime Museum. Work on the recording and conservation phase began in October 2019.


Updates and insights from the news and our team

😃We are thrilled to be part of @sydneyisopen!

🔎Join Renee Malliaros and Heather Berry for a behind-the-scenes, in-person, look at the #BarangarooBoat conservation project on Saturday, 5 November. 

😱Tickets are nearly booked out: 

Image: © Justin Sanson/Transport for NSW

#Heritage #SydneyIsOpen #FocusTour #BoatLovers #Conservation
Time to exterminate biological life forms! While the timbers await chemical treatment they must be kept free of microbes which can contribute to their decay. A broad spectrum biocide is added to help with this. The timbers are sanitised in this way prior to the addition of the PEG wax in which they will be preserved and we will be keeping an eye 🧐 on microbe colonies throughout the conservation process.

Image copyright: Sydney Metro

#BarangarooBoat #brooboat #timberconservation #conservatorlife #wooddecay
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On the blog

Barangaroo Boat excavation. Image: Renee Malliaros/Silentworld Foundation for Sydney Metro, 2018.

Finding the Barangaroo Boat

Nobody expected to find a boat while digging for a new train station...

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Oysters and pitch on plank. © Sydney Metro.

Cleaning the Barangaroo Boat

How do you clean a 200-year-old, heavily sedimented, archaeological boat? With dish brushes, toothbrushes, plastic scrapers, and LOTS of care.

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The personal experiences of a 3D scanning novice working on the recording of the Barangaroo Boat wreck timbers. In Sydney, Australia.

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Heather Berry (left) shows conservators a timer sample at the Barangaroo Boat Conservation Forum. Image: © Cath Snelgrove/Sydney Metro

Barangaroo Boat Conservation Forum

On Monday 15 August Sydney Metro and Silentworld Foundation welcomed archaeological conservators to their Yennora facility for Barangaroo Boat focused day. While we have been able to provide some smaller site tours and visits for interested parties, this day allowed us to share with our colleagues the exact progress and conservation plan for the Barangaroo Boat.

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0 Comments3 Minutes

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