MEAN LOW WATER 



ORIGINAL DESIGN-INNER END S. JETTY 



,//3 DISTANCe TO CENTER 



BINDER POLES 



SOLID RAFT 



LOG AND BRUSH MATTRESS 

 NOT TO SCALE 



LOGS 11- TO 14" DIAM LARGE END 

 BRUSH 6" TO 8" COMPRESSED. 

 BINDERS 6" TO 8" DIAM SPIKED. 

 BRUSH BINDERS T' TO 3" DIAM TIED 

 COVERED WITH 12" TO 15" STONE 



a. Pre-1900's log and brush mattress 



b. North jetty, 1923 

 Figure 23. Early jetty cross sections, Jacksonville 



43 



