Which mechanical failure affected John Smeaton's Eddystone Lighthouse (1759) during its operational lifespan?

💡 Explanation

When winter storms struck, undermining the base, progressive scour erosion occurred because the soft rock foundation was vulnerable to wave action, leading to tilting and eventual dismantling. Therefore, foundation collapse resulted, rather than corrosion, timber rot or lens cracking, which are related to material defects or different environmental factors.

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