PLATE 4. 



SECTION OF TIMBER DAM FOR RIVERS 

 OF SMALL FLOODS. 



PASS TRESTLE OP THE KLECAN NEEDLE DAM ON THB 



RIVER MOLDAU, BOHEMIA, 1899. 

 (Trestles are spaced ij meters apart.) 



12" flushboard 



-?- 



Bukine 



JA 



SECTION OF TIMBER DAM AS USED ON THE Fox RIVER, 



WISCONSIN, 1898. 

 (Ordinary flood range, about 3 feet.) 



