Originally Posted by
Waterways
They were used for unusual cargo for security reasons - nuclear amongst them. Extensively used for secure items to and from USA in WW2.
They were originally designed for the storage of petroleum.
Cut/blasted into the solid sandstone of a little cliff.
I can't find a date in my notes (1880s springs to mind?) but I do have this:
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“Large quantities of Oil are stored in tanks on the Parkhill estate to the southward of the Herculaneum Dock, and 60 casemates, bored in the solid rock of the vicinity, are provided for the storage of oil in barrels, etc. Jetties have been constructed in the River Mersey for the discharge or load of the largest vessels or the smallest barges with oil cargo or fuel oil. The oil is stored in large tanks connected by pipes to the jetties; the southernmost of which has been so constructed as to enable the largest oil tanker afloat to berth and discharge her cargo by pipe lines direct into storage tanks. The second jetty is used for barge traffic. The total storage accommodation of the tank is 140,000 tons.” (Source: Ward Lock Guide. 1930s).
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