Example of a row of 50 foot (18 meter) high cedar trees planted in a row. 
Mature cedar tree roots are exposed on the bank side as water washes away the earth.
Closer view of the cedar hedge originally planted for a screen to traffic noise as they go down the hill and hard turn to the left at the bottom.
Cedar tree roots are good at slowing down the process of erosion by holding back loose earth and rocks.
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