450 



350 



250 



^ 150 



o 50 h 



c 

 o 



en 



S -50 



-150 

 -250 - 



-350 



J I 



1962 1963 1964 1965 1966 1967 I96B 1969 1970 1971 1972 



Profile Line 1 1 



450 r 



350 



250 



z: 150 



a> 



o 50 



c 

 o 



«n 



"5 -50 



- 150 



-250 



-350 



X Extrapolated Datum 



■ ■ I I 



1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 



Profile Line 12 



131 



