Lerfall ved Kleivbogen, Botne.

Abstract

About 10.30 in the morning of the 12th January, 1937 a landslip took place at Kleivbogen, near the town Holmestrand. A highway slid into the fjord, and a breakage of the Larvik railway near the road was impending. Two men were working between the road and the beach when they observed \"a sliding of the fjord bottom\". They ran for their lives across the hit area, the ground cracking and sliding under their feet. The catastrophe was not yet finished. Slips continued during the day, and the risk for a sliding of the railway line seemed to increase. Trains were stopped at a secure distance from the threatened part of the railway, and passangers had to walk from one train to another. The next day, however, the erosion of the waves had reached rock in the wall of the slide. The rockground prevented further slide. A survey of depths and variety of the ground at the bottom of the fjord was made, disclosing a change between firm and weak layers. On top of the firm bottom layer 2-6 m of clay was deposited beneath 2-6 m of water. Afterwards the road was rebuilt along the old trace on stone foundation over the slide depression.