22 



TYPE Concrete cylinders constructed inside of a steel coffer dam 

 shell: 



Date Number of 

 Structure Constructed Supports 



Pier 36 1909 427 



Pier 38 1909 437 



Pier 40 1909 440 



Pier 28 1912-13 451 



Pier 26 1912-13 664 



Pier 39 1913 531 



Piers 30-32 1913 1509 



Condition 1921 



All cylinders intact, minor re- 

 pairs necessary in some cases. 

 10 cylinders repaired by encas- 

 ing in a 3" shell of dense con- 

 crete. 



All cylinders intact, minor re- 

 pairs necessary in some cases. 

 47 cylinders repaired by encasing 

 in a 3" shell of dense concrete. 



*A11 cylinders intact, minor re- 

 pairs necessary in some cases. 

 51 cylinders repaired by encas- 

 ing in a 3" shell of dense con- 

 crete. 



All cylinders intact, 142 cylin- 

 ders in depressed track and out- 

 side row defective at low water 

 joint; all repaired by grouting 

 or concreting joint. 76 cylin- 

 ders repaired by encasing in a 

 3" shell of dense concrete. 



All cylinders intact, 161 cylin- 

 ders in depressed track and out- 

 side row defective at low water 

 joint; all repaired by grouting 

 or concreting joint. 27 cylinders 

 repaired by encasing in a 3" 

 shell of dense concrete. 



Condition good. No repairs to 

 date but small amount of patch- 

 ing necessary. 



Condition good. Cylinders have 

 rough surface but concrete is 

 sound and shows no disintegra- 

 tion. 



TYPE Concrete protected green piles Koetitz method: 

 Date Number of 



Structure Constructed Supports 

 Pier 17 1911 1130 



Bulkhead 

 28 to 30 



1909 



2f 



Condition 1921 



All supports in first class condi- 

 tion. 



17 piles show small rust cracks 

 above high water. Otherwise 

 piles in first class condition. 



