Ship John Shoal Lighthouse is named after the Ship John that grounded on a shoal near the mouth of the Cohansy Creek in December 1797. As the ship gradually sank, drifting sand around the wreckage increased the shoal area.
Orginally, the builders considered a screwpile structure because of the shoaling bottom, but they eventually chose a cast iron caisson filled with concrete for the foundation. Built in Second Empire Victorian styel, the new lighthouse had a focal plane of fifty feet.
The lighthouse, is now automated.
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