Table 3. Summary of Construction Data 



Date 



Work Done 



Contractor 



Cost to Date 



Tonnage to Date 



Old Breakwater and the Ice Breaker 



1828 



Construction started 



Not known 











1829 





Halsey Rogers Company, N.Y. 











1830 



242,770 tons deposited 



Canvass White & Co., N.Y. 











1831 





Leiper & Crosby, Pa. 











1832 





15 separate small contractors 











1833 



154,459 tons deposited 

 in best progress to date 



Leiper, Hill & Jacques, Pa. 







518,733 



1834 



122,995 tons deposited 



Leiper & Co., J.F. HiU, Pa. 







640,520 



1839 



Last load of original 

 construction period, 

 53 tons deposited, 

 6 Sept. 1939 



Leiper & Co., Pa. 



$1,880,000 



835,000 



1851-1869 



Completion to design 

 height but excluding 

 Gap 





2,123,000 





Gap Closure 



1882-1898 





529,900 





Breakwater and Ice Piers 



1896-1901 





2,090,800 





Total C 



9st Complete Structures 





$4,743,700 





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



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