
When constructing the Skerryvore lighthouse, Alan Stevenson faced several challenges. The rock upon which the lighthouse was to be erected was a smooth, compact mass of dark-colored crystal[1]. This made excavation for the foundation difficult[1]. There were also caverns in the rock that limited the area for building[1].
Another challenge was the location of the rock, as it was far from available resources[1]. The nearest island, Tyree, was barren, so materials had to be transported from distant locations[1].
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