EXAMPLES OF DOCK PLANS. 



21 



J. Bassell, M.M.I.C.E., has a length of 2500 feet by a width of 

 500 feet, equal to an area of 28} acres, with an ordinary depth of 

 30 feet over the inner sill of the lock. 



FIG. 12. 



^ 



>4 L E X A N D R A ^D C K BUOYo 

 e 



rW OKfff OUTER SILLS OF LOCK 

 35 Feet at H. W. Auerage Spring 

 25 Feet at H. W. Average Neaps. 



Tyfo. Etching Co.Sc. 



FIG. 13. 



