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| | Lighthouse Design and Equipment |
 | | The preferred foundation for masonry lighthouses was bedrock but a method using wooden piles driven into the substrate and topped with timbers and/or rubble-stone had to be used in regions, such as the coastal plain, where bedrock was lacking. |
 | | Masonry walls of lighthouses are typically several feet thick at the base and decrease in thickness upward, with heights ranging from 30 feet at Piney Point Lighthouse (1836), Maryland, to the tallest lighthouse in the United States, the Cape Hatteras Lighthouse (1870), North Carolina, at 197 feet. |
 | | lighthouse type used a large cast-iron cylinder, which was sunk on the bottom and filled with rock and concrete to form a foundation. |
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