SIDE 



SECTION OF OLD BREAKWATER -D- 



/ SUB-STRUCTURE BUILT 1869-1893 \ 

 \SUPER-STRUCTURE BUILT 1907-1924/ 



Slope Ion 1.5 



'^mw^i'//^//Awmy^AWMW/m'Mmi>M mm^. 



Slope I on I.S 



SECTION OF SOUTH ENTRANCE 

 ARM BREAKWATER -J- 



(BUILT IN 1936) 



Deck Stone - Minimum weight 5 tons 



"a" Stone — Minimum weight 3 tons, not less thon 50% 5 tons or more. 



"d" Stone — Minimum weight 3 tons 



Toe Stone— Minimum weight 7 tons 



"b" Stone — Minimum weight lOOpounds. 



" C" Stone — Not less than 35% 75 pounds or more, not more than 

 3% less than one pound. 



Figure 267. Typical old and south entrance arm breakwater 

 cross sections, Buffalo Harbor, New York 



392 



