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 roadÕs 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. |