Malinta Tunnel - Construction

Construction

Its construction, without benefit of new equipment or funds apportioned by the United States Congress due to agreements reached during the Washington Naval Conference, began in 1922 and was completed in 1932.

The Army Corps of Engineers rented obsolete equipment from Baguio gold miners for a nominal fee and made do with condemned TNT from the Ordnance Department. The explosive delivered was in powder form, and had to be wrapped into makeshift cartridges using magazine pages, which were placed into holes drilled into the rock. Labor was provided by the Philippine Commonwealth in the form of 1,000 convicts from the Bilibid Prison in Manila. A company of engineers from the Philippine Scouts worked on the construction as foremen and clerks.

The cement for concrete used to line the tunnels was bought from the Japanese.

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