42 TON DOLOSSE 

 (2 LAYERS) , 



SLOPES VARIES 



54--90' AT JETTY 

 HEAD ONLY 



SLOPE VARIES 

 MLLW 



42 TON DOLOSSE 

 '(2 LAYERS) 



ROCK ON SOUTH JETTY ONLY 

 (BOTH SIDES) 



STA 84 + 00 TO END OF SOUTH JETTY HEAD 

 CROSS SECTION 



SLOPES VARIES. 



NOTE: 



CONC CAP IS 12' + WIDE 



SOUTH JETTY FROM 38 + 00 TO 48 + 00 



SLOPE VARIES 



WOOD MATS 



WOOD pSTA 41 r60 



MATS 4 STA 43 + 24 (SOUTH JETTY NO BEDDING) 

 AT L STA 6 4-72 



STA + 00 TO STA 84 + 00 

 CROSS SECTION 



Figure 4. Typical cross section of south jetty 



Additional history on the Humboldt Bay jetties may be obtained from Bottin (1988). 

 The current lengths of the north and south jetties are 2,225 and 2,741 m (7,400 and 

 8,993 ft), respectively. Figure 7 shows an aerial view of the jetties in September 

 1996. 



10 



Chapter 1 Introduction 



