614 

 613 

 612 

 611 



602 



| I I I I I | I I I I I | I I I I I | I I I I I | I I I I I | I I I I I | 



I ' I ' ' I I I I I I I I I I I I I I I I I I I I I I I I I I I 



S 10 IS 20 25 

 MAY 



9 10 19 20 29 9 10 19 20 29 

 JUNE JULY 



9 10 19 20 29 

 AUGUST 



5 10 19 20 29 9 10 19 20 29 

 SEPTEMBER OCTOBER 



Figure 1. --Headwater elevations. Rock Island Dam, May 1 to October 27, 1962. 



| I I I I | Vv\ I I I I | I I I I I | I I I I I | I I I I I | I I I I I | 



572 



556 

 554 

 552 

 550 



I I I I 



I I I I I I 1 I I I I I 



_l I I I I I I I I I I I I I 1 1 1 1 1 1 1 1 1 1— I 1 1 1 1 1 1 1 1 1 1 



5 10 15 20 25 5 10 15 20 25 5 10 15 20 25 5 10 15 20 25 5 10 15 20 25 5 10 15 20 25 



MAY JUNE JULY AUGUST SEPTEMBER OCTOBER 



Figure 2.— Tailwater elevations, Rock Island Dam, May 1 to October 27, 1962. 



