John Smeaton He pioneered the use of 'hydraulic lime' (a form of mortar that will set under water) and developed a technique involving dovetailed blocks of granite in the building of the lighthouse. His lighthouse remained in use until 1877 when the rock underlying the structure's foundations had begun to erode; it was dismantled and partially rebuilt at Plymouth Hoe where it is known as Smeaton's Tower. Deciding that he wanted to focus on the lucrative field of civil engineering, he commenced an extensive series of commissions, including: Smeaton is considered to be the first expert witness to appear in an English
Rivingen Lighthouse flash of light every 5 seconds. The light is white, red, or green depending on the direction. The lights can be seen for up to . The original 1886 tower has been inactive since 1925. The white, square tower was about tall with a sharply pyramidal dark maroon, metallic roof and a spire. The tower is attached to the front of a one and a half story keeper's house. The old tower and house are now a privately owned summer residence which is only accessible by boat. Rivingen Lighthouse Rivingen Lighthouse () is a coastal lighthouse in the municipality of