Berms prevent water from
leaving the roadbed
| This is a picture of a
berm. Berms form when grading or
plowing push sediments to the side of the road, building up a ridge that
prevents water from draining off the roadbed, causing erosion. As you can see here, sediments were
trapped against trees that are right on the road�s edge, most likely during
plowing, as you can see scars on the tree trunk from the plow blade. Berms can be easily cleared by moving
the sediment elsewhere. |