1.0- ft Contour 



40 - 



45 - 



50 







-2.1-ft Contour 



^^^---^ 



-«^ 



— <;>^. 



Ronge 



1 





Ronge 



3 





Range 



1 



5 



1 



1 1 



50 100 150 



Cumulative Time (hr) 



200 



Figure 17. Comparison of the -1.0- , -1.4-, and -2.1-£oot contour movements. 



37 



