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- Remove Avalanches and rock falls filter Avalanches and rock falls
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- Remove Modalen filter Modalen
![View in over Mostraumen.](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/mo_16.jpg?itok=GnR34JLO)
Mostraumen
Until 1743 the people from Modal had to wait for a flood in MOSTRAUMEN before they could draw their boats up the river current, and then row back across Lake Movatnet. But, that year the flood opened a free passageway all the way to Mo. Hordaland had gained a new tidal waterway.
![Under the grass fields lie large quantities of sand and gravel.](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/mo_24.jpg?itok=e4ePAE19)
Nedre Helland- Sand Quarries
The three spades in the municipal coat of arms for Modalen are sand spades. Sand quarrying has brought income and employment. As much as 70,000-80,0000 tonnes of sand and gravel left the municipality each year since the turn of the millennium, to be used as cementing sand. Why is Modalen endowed with so much sand?
![Nedre Helland](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/mo_1.jpg?itok=J9xuc7pb)
Nedre Helland- skred
Many still remember when the avalanche struck Nedre Helland, on the 14th of August, 1953 14:30 o'clock. All of the buildings at one of the farms and the main house on the neighbouring farm were destroyed. The one woman who was inside a building escaped, frightened but unharmed. The same with the others who lived at Nedre Helland; everyone was a safe distance from the avalanche.
![Mo with the Otterstad farm in the background early in the 1900s.](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/1/kvh_329-1_0.jpg?itok=JUVMdLHq)
Otterstad
Tthe Otterstad farms lie in the innermost part of Mofjorden, on the northwest side of the river. The row of stave-built boatsheds that belong to the farm were probably constructed a little after the middle of the 1800s. Both here and on the Mo side, the boatsheds were important storage places at the seashore; wood and other farm products intended for the town; corn and merchandise in return.
![Steinslandsvatnet](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/nv_466.jpg?itok=Wx0aw3W7)