Projected 

 Superstructure 



Figure 31. Delaware Breakwater substructure. Drawing was prepared for specifications 

 dated 18 October 1894, showing proposed top structure for the "Gap" 

 (U.S. Army Engineer District, Philadelphia— in press, 1974). 



Figure 32. View northward along top of "Gap" construction with ice breaker in background 

 (photo taken in 1890's). Note relatively calm water on harbor side 

 (U.S. Army Engineer District, Philadelphia-in press, 1974). 



59 



