6. By a hurricane or extreme wind force, especially when accompanied by rain and the location is that of a narrow, steep valley, blowing away or dissipating the top and the surface of an uncovered embankment.
7. By a slope becoming honey-combed by rodents, and in some few countries by an embankment in a river or the sea being bored and disturbed by crustacea.
8. Insufficient slope for permanent stability at the time of or after deposition.
9. The want of adhesion between the surface of the ground upon which an embankment is tipped and the deposited material.
10. By the accumulation at the foot of an embankment of boulders or lumps having no cohesion, and no adhesion to the surface of the ground upon which they are deposited.
11. The weight being too great upon the ground upon which an embankment rests.
12. By unequal loading.
13. An accumulation of water, caused by the unevenness of the surface of an embankment, or by the ground not being prepared so as to prevent a lodgment of water.
14. By obstructing the established discharge of land-water or by attempting to divert the natural flow of underground waters.
15. The localisation of the surface drainage.