EXAMPLES OF DOCK PLANS. 



velocities thus obtained be considered too great without unduly 

 increasing the width of the entrance, the alternative will be 

 to provide an additional entrance. When the docks are worked 

 entirely by locks, and with an outer basin small in comparison 

 with the width of entrance necessary to admit the largest class 

 of ships expected to frequent the dock, the above considerations 

 will have less weight. At the port of Havre, the gates are 

 kept open until a fall of eight inches in the tide has taken place, 

 but beyond this the currents in the locks and entrances are 

 found to be dangerous to navigation. 



TYPICAL EXAMPLES OF DOCK PLANS. The Avonmouth Dock 1 

 (Fig. 7), constructed from the designs of Mr. J. Brunlees, 

 M.I.C.E., is situated on the Gloucestershire side of the Avon, 



vay Co. Property 



FIG. 7. 



and is so near its mouth that from the anchorage of King's 

 Road in the Bristol Channel to the entrance lock the distance 

 is only about 1000 yards. The dock is oblong in shape, 1400 

 feet long by 500 feet wide, equal to an area of about 16 

 acres. The available wharfage, after allowing 100 feet across 

 the entrance and for ships' berthage alongside of 50 feet, is 

 3500 feet. The lock is ct the west end of the dock, and has a 

 direct lead to the King's Road anchorage, through an entrance 

 channel of about 350 yards in length by an average width of 

 70 yards, with a depth of 44 feet at high water of equinoctial 

 spring tides, and 40 feet at ordinary spring tides. The high 

 tides in the Severn and Avon confer special advantages as 

 > M.P.LC.E., vol. 1?. p. 3. 



