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1876 - Great Extension Declared Open

The Princess Louise steamed into the new Dockyard extension works to declare it open (see 1864).

During the extension works there were as much as 9 miles of railway viaducts in use either going up or down as the excavation proceeded and the building work commenced. There were 13 steam locomotives employed and over 90 various types of steam engines. The following
table gives some ideal as to the scale of this vast construction.

Material Amount

Excavated material………………….……19,600,000 cubic yards.

Dredged material………………….……...240.000 tons.

Concrete…………………………….……..650.000 tons.

Timber………………………….…………281.000 loads.

Bricks………………………….………….155.000.000.

Portland stone………………..……........…3.984.000 cubic yards

Granite……………………………….……5.329.000 cubic yards.

Iron…………………………………….….5.000 tons.

Work force……………………………..1500-1600 men.

Convict labour……………………….…….800 men.

Yearly brick production……………..20,000,000

Cost voted by Parliament…………£2,350,000

Dredging work not completed until 1878….800.000 cubic yards.

In 1801 the Navy Board estimated that its annual consumption of timber was over 36.000 loads; by comparison the dockyard extension used 281.000 loads during its 5 years construction.