EXAMPLES OF DOCK PLANS. 27 



as the citadel canal, from which it communicates through the 

 citadel lock with the old port. 



The Royal Albert Dock l (Fig. 17), on the Thames, constructed 

 from the designs of Mr. Rendel, M.I.C.E., is in fact a prolongation 

 eastward of the Royal Victoria Dock, with which it is connected 

 by a short passage 80 feet wide. 



The entrance to the lock at Gallions Reach is as nearly as 

 possible at right angles to the river, and is formed by curved 

 jetties projecting into the stream, and enclosing a deep trumpet- 

 mouthed embayment. 



The lock is 800 feet long over all, and 80 feet wide. It is 

 divided into two chambers of unequal lengths by an interme- 

 diate pair of gates. The distance between the extreme gates is 

 550 feet, with a depth of 30 feet over the sills at Trinity high 

 water. 



The lock opens into an entrance basin irregular in shape, and 

 of about 9 acres area, with a depth of water from 30 feet to 35 

 feet 6 inches. 



The connection with the main dock is by a passage 300 feet 

 long by 80 feet wide, in which there is placed a pair of gates 

 similar to those in the lock, so that the basin can be utilized as 

 a 9-acre lock. The depth of water over the sill of these gates 

 is 27 feet. 



The main dock is about a mile and a quarter long by a 

 uniform width of 490 feet between the copings, and has an 

 area of about 75 acres. 



On the south side of the main dock, near the western end, 

 there are two dry docks. The smaller of these is 420 feet long 

 by 68 feet wide between the copings, and the larger 510 feet 

 long by 85 feet wide between the copings. The sills of both 

 docks are 22 feet below Trinity high water. 

 1 The Engineer, vol. 1. pp. 6-10. 



