Bui. 393, U. S. Dept. of Agriculture. 



Plate IV. 



OPRRE 6795 



FiQ. 1.— Wooden Bridge Failure on Chancellorsville Road, March, 1910, 

 Spotsylvania County, Va. 



OPRRE 6796 



Fig. 2.— Safe and Lasting ^Concrete Bridge on Gravel Road, Spotsylvania 



County, Va. 



Same location as above, April, 1913. 



