o 



E 



20 



25 



0.9-ft contour 



-2.0-ft contour 



RANGE 01- 



RANGE 03- 



RANGE 05- 



RANGE 07- 



RANGE 09- 



50 100 150 



Cumulative Time ( hr' 



200 



250 



Figure 33. Comparison of the -0.9-, -1.3-, and -2.0-foot contour 

 movements in experiment 70X-10. 



64 



