(j) The trapping capacity of the initial Installation and succeeding 

 lifts of a 1 .2-meter-high sand fence averages between 5 and 8 cubic meters 

 per linear meter (2 to 3 cubic yards per linear foot). 



(k) CERC's experience has been that an average of 6 man-hours 

 are required to erect 72 meters (235 feet) of wooden, picket-type fence or 

 56 meters (185 feet) of fabric fence when a six-man crew has materials 

 available at the site and uses a mechanical posthole digger. 



(1) Junk cars should not be used for dune building. They are more 

 expensive and less effective than fencing (Gage, 1970). Junk cars mar the 

 beauty of a beach and create a safety hazard. 



1 3 



30 



40 



50 



60 



70 



Dislonce 1'om bose line 



80 



Figure 6-28. Sand accumulation by a series of four single-fence 

 lifts, Outer Banks, North Carolina (Savage and 

 Woodhouse, 1969). 



6-41 



