III. VALUES OF r FOR QUARRYSTONE EMBANKMENT 



Slope (cot 9) 



H/k 



V 



r 



1.5 



3 to 4 



0.60 



2.5 



3 to 4 



0.63 



3.5 



3 to 4 



0.60 



5.0 



3 



0.60 



5.0 



4 



0.68 



5.0 



5 



0.72 



Filter layer 



Armor layer; 1.5 to 3 stones thick 



Embankment 



^^^77^7Z^7Z^77^Z^ 



25 



