2,200 



2,100 



2,000 



1.900 



1.800 



,_; 1.700 



S 1,600 



Jo 1,500 



, 1,400 



■3 1.300 



o '.200 

 ^ 1.100 

 o 1.000 

 .1 900 

 S 800 



CO 



i, 700 



S 600 



" 500 



400 



300 



200 



100 







Figure 66. 



1957 1963 1965 1968 1971 1974 



Oote 

 Time history of cross-sectional area changes 

 by section location (in feet north or south 

 of weir, e.g., 150 N) Rollover Pass, 1957-74. 



£osf Boy 



Contour Infervol 2ff -2 



-\- Deposifion 

 — Erosion 



400 



(ft) 200 



Weir 



100 200 



(ft) 



Gulf of Ateiico 

 Figure 67. Depth changes, Rollover Pass, 



Texas, July 1968-winter 1971-72 

 (after Prather and Sorensen, 1972), 



75 



