[1][2][3] The Fog Point Light, on the northwestern corner of Smith Island, marked the entrance to Kedges Strait from 1827.

In 1875 a five-legged screw-pile structure was built, which survived until 1893, when ice knocked it over.

Initial plans to replace it with a new screw-pile light were changed when extra funds became available from the savings in constructing Wolf Trap Light in Virginia, so a caisson structure was erected instead in 1895, using the pneumatic process to sink it in place.

The bottom being soft, the caisson sank further than expected, and an extra course of plates had to be added to the top.

Automation came in 1950, and some years later the house was removed, leaving the brick tower standing off-center on the platform.