12
PORTS AND HARBOURS OF THE BRITISH EMPIRE:
UNITED KINGDOM.
570
13
Question.
Belfast.
1. At bar or entrance, what Width at entrance
ie:-
(1) the minimum width ? (2) the
minimum
navigable depth. L.W.D.S.T.?
(Note. If between the en-
trance and the deep sea there are bars or shoals where a lesser depth occurs than the mini- mum indicated above, a list of such obstructions and of the depths over them (L.W.0.8.T.)
should be given.)
2. In the approach channel! from bar or entrance to berthing accommodation, what is :.
·
the minimum and
maximum width ? (2) the minimum and maximum depth. L.W.O.S.T.!
Depth, 22 It.
ins.
(L.W.O.S.T.)
The maximum width of the
Victoria Channel is 300 ft. and the depth of the dredged channel is 22 ft. 6 ing. (L.W.O.S.T.)
Bristol (Avonmouth).
Cardiff.
Dredged channel to Queen
Alexandra Dock:
Width - 400 to
Depth
-
5
1,000 ft. ft.
(L.W.O.S.T.)
Manchester.
For the width and depth at the entrance to the River Mersey, see under Liverpool
).
From the boundary of the Customs Port of Manchester (f... a line between Dungeon Point on the Lancashire shore to Ince Ferry on the Cheshire shora) to the entrance to the Manchester Ship Canal at Eastham the width of the channel is
and the depth (L.W.0.8.T.).
ft.
The bottom width at the full depth of the Manchester Ship Canal is 120 ft... except in small portions, where it decreased to 0 ft. and increases to 150 ft., 170 ft. and 180 ft. The depth (not tidal) is 28 ft.
Newport.
Swansea.
Dredged channel to new entrance lock
of Alexandra Docks:
Width, 630 to 850 ft.
Depth, 2 to 6 ft. (L.W.0.8.T.).
Dredged channel to the King's Dock :
Width 4ft.. depth 14 ft. (L.W.0.8.T).
3. What in-
1) the rise and fall of tides
(a) ordinary spring,
(b) ordinary neaps 12
(2) the rise of ordinary neaps above L.W.0.8.T.?
(1) (a) Ordinary aprings, 9 ft. | (1) (4). Ordinary springa 42 ft.
$ ins.
(b) Ordinary neaps 24 ft. (b) Ordinary neaps, 7 ft, ! (2)
& ina.
(2)
In entrance channel:
At the entrance to the Canal —
(1) (a) Ordinary springs 38 ft.
6 ins.
(1) (a) Ordinary springs.
(b) Ordinary neaps 18 ft.
6 ins.
(6) Ordinary neaps.
(2)
(2) Rise of ordinary neaps
above L.W.O.S.T. 27 ft.
On all of entrance lock to
Queen Alexandra Dock.
(1) (a) Ordinary springs 37 ft.
(b) Ordinary neaps 17 ft.
(3) Rise of ordinary neaps
above L.W.O.S.T. 27 ft.
On sill of new entrance lock above referred
to:
(1) (8) Ordinary springe, 33 ft. 9 ins.
(b) Ordinary neaps, 14 ft. 7 ins.
(2) Rise of ordinary saps abore L.W.O.S.T., 23 ft. 9 ins.
(1) (a) Ordinary springs, 28 ft.
(2)
(5) Ordinary neaps, 12 ft. 8 ins.
4. What is the maximum available depth of water- (a) at piers or wharves,
L.W.O.S.T.?
(b) in the case of enclosed docks, in the en- trance locks, if any, and at dock quays, H.W.O.N.T.?
The maximum available depth of water is 31 ft. 6 ins. (L.W.O.S.T.) at the
The
The Royal Edward Dock is the
deepest in the port. depth of water at the en- trance lock to this dock in 36 ft. (H.W.O.N.T.) over the inner sill and the maximum depth at the quays 33 ft. (not tidal).
The Queen Alexandra Dock is
the deepest in the port. The depth of water at the entrance lock to this dock is 32 ft (H.W.O.N.T.) over the inner sill and the maxi- mum depth of water in the dock itself ft.
28 ft. (not tidal) at the larger of the
Manchester Docks.
The North and South Alexandra Docks are the deepest in the port. The depth of water in the new entrance lock" to those docks is 28 ft. (H.W.O.N.T) OTT the inner sill, and the maximum depth of water in the South Dook extension is 33 ft. (not tidal).
The King's Dook is the deepest in the
port,
The depth of water at the entrance lock to this dock is 25 ft. 6 ins. (H.W.O.N.T.) over the inner silt, and in the dock itself the maximum depth in 33 ft. (not tidal).
5 What are the respective lengths of piers, wharves, or in the case of enclosed docks) dock quaye, where the maximum depth of water, referred to in Question 4, exists?
What percentage does the total of these lengthe bear to the total accommo dation at the port ?
The length of quay with 4 depth of 31 ft. 6 in. is 600 #t.
This represents per cont. of
the total quayage of the port, which amounts to 27,000 ft.
The length of quays at the Royal Edward Dock, with a depth of 33 ft., is 4,392 ft. This represents 18 per cent.
of the total accommodation at the Port of Bristol, which amounts to
The length of quays in the
Queen Alexandra having a depth of 6,700 ft.
Dock ft. is
per cent. of the total accommodation
This representa
at the Bute Docks, Cardi# which amounts to 35,080 ft.
The length of quays in the Manchester
Docks having a depth of 28 ft. is
It..
OF
per cent, of the total accommoda-
tion, which amounts to 61 miles.
.
The length of quays in the South Dock extension having a depth of 33 ft. is 7,586 ft. This length represents
per cent. of the total accommodation in the port, which amounts to ft.
The length of quays in the King's Dock having a depth of 33 ft. is 13,550 ft. This represente per cent of the total accommodation at the port, which amounts to 32,200 ft.
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