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htQSH J./WEKINQ- 



■ ROCK WALLS, OR DRY STONE 

 WALLS, WOOD PLANK WALLS 



In particularly difficult urban stream 

 settings with steep, vertical banks, lit- 

 tle right-of-way space to work within, 

 and high velocity flows, concrete 

 channels have traditionally been 

 recommended for stream bank stabili- 

 ty. Alternatives to this may include ga- 

 bions, or crib walls, but in some cases 

 handplaced rock walls (without mor- 

 tar), or walls constructed of more 

 aesthetically desirable wood planks 

 have been used instead. Extensive 

 hand labor and skill is required to 

 build a durable dry stone wall, but 

 work that still remains in place from 

 government conservation projects of 

 the 1930s is a testament to their effec- 

 tiveness. The rock can be interplanted 

 with native vegetation which can 

 serve not only as an aesthetic benefit 

 but as an important structural role in 

 stabilizing the slope as well. 



San Luis Obispo Creek in downtown San Luis Obispo uses a variety of aesthetically designed 

 retaining walls. 



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