North Jetty Fog Horn

This is the north jetty's fog horn and entrance light. The jetties are approximately 6,000 feet (1,800 m) long and 2,200 feet (670 m) apart. Storm damage led to rebuilding of the jetties in 1911, 1927, 1932, 1939, 1950, 1957, 1963, 1971, 1988 and 1995. Entrance currents are strong ranging from 2.0 knots average maximum ebb and 1.6 knots average maximum flood; although peak rates can be nearly twice as high. In 1971 and 1984, 42 short tons (38 t) dolosse were added in two layers to secure the jetties which are maintained by the U.S. Army Corps of Engineers. In 1972, a local contractor manufactured 4,796 dolosse locally, 4,795 of them are on the jetties, the other one is outside the Eureka Chamber of Commerce.