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peterson. PROBLEM OF GULLYING 



[Ch. 23 



Fig. 6(a). One type of erosion structure, 

 utilized in C.C.C. program. Net wire 

 spreader has caught silt but has failed 

 to induce vegetative recovery. Freeman 

 Flat area near Safford, Arizona. Struc- 

 ture built about 1938. Photo taken 

 October 1948. 



Fig. 6(b). Partially breached rock 

 spreader built by C.C.C. about 1938. 

 San Simon Valley near Rodeo, New 

 Mexico. Photo shows slight increase 

 in vegetation on alluvial fill behind 

 spreader. Photo taken October 1948. 



Fig. 6(c). Spillway and drop structure 

 leading from spreader dike constructed 

 by C.C.C. Steamboat demonstration 

 area, Navajo Indian Reservation near 

 Ganado, Arizona. Structures have pre- 

 vented deepening of the channel but 

 will soon fail unless repaired. 



