84
Question.
10. What
the grOBS mas revenue for the last com- pleted financial year?
11. (1) Can the depth of water (a) at the entrance and the approach in channel-
(b) in the case of en- closed ducks, at the
entrance lock, if any, of any impor- tant dock or docks- (c) at the principal
bertha-
be deepened to 40 feet at L.W.OS.T. (in the case of the berths at enclosed docks, H.W.O.N.T.), and can accommodation be pro- vided for vessels 1,000 feet in length, and of 100 feet) beam ?
If not, to what extent can deepening be effected, and for vessels of what dimensions (length, draught, and beam at that draught) can accommoda- tion be provided ?
cost-
In what period?
peroximate
PORTS AND HARBOURS OF THE BRITISH EMPIRE:
Aden.
The gross revenue for the year.
ended
1915 was Rs. 5,47,764 (£36,517 12%).
(1) (a) The particulars have not yet been ascertained. 01
No docks. (a) J
(a) for the entrance and approach channel? (b) in the case of eu
closed docks for the entrance lock, if any, of such impor-· tant dock or docks? (o) for the principal
berths ?
(2) and (3) (). See answer to
question 11 (1) (a).
(2) and (3) (b) No docks. (2) and (3) (c). See answer to
question 11 (1) (a).
Bombay.
The gross revenue for the year ended 31st March 1915 was 684,8791.
(1) (a) The depth of water at entrance and in the approach channel can be deepened to, say. 32 ft. (L.W.O.S.T.) (pre- Bent depth 24 ft. 9 in.) to accommodate vessels of any length and beam with a maxi- mura draught of 30 ft. at L.W.O.S.T. (this depth will provide 40 ft. at lowest high water).
To secure this depth it would be necessary to dredge for a distance of 7,000 lineal ft. from the existing chunnel proper.
(b) e) The depth of water can- not be deepened at the en- trance lock or at the principal berths except at an enormous cost, the bottom being rock. (2) The work of deepening the
channel approach
would occupy several years, as there is rock in a portion of the channel, which would have to be drilled and blasted.
Calcutta,
The gross revenue for the finan
cial year ended 31st March 1915 was Rs. 1,44,50,349 · (963,3561, 12.).
river channel cannot be deepened to a depth of 40 ft. There are at (L.W.O.S.T.). present two suction dredgers employed in controlling the river channels. One more is now (August 1915) under construction, and a further one will probably be pur chased in the near future. It is anticipated that with four dredgers, vessels having a draught of 30 ft. will be able to navigate the river with as little delay as vessels now drawing 25 it. It was recommended by the Port Facilities Committee in their 1914 report dated March that a very careful examina- tion should be made into the possibilities of river training. The question has not as yet been sufficiently examined to state what results may reason- ably be anticipated. Berthe. It is not possible under present conditions to dredge to greater depths at the jetties without endan gering the safety of the structures. Greater depths could, however, be obtained eithor (1) by extending the jetties further into the river. or (2) by supporting the toe of the slope of the river bank along the face of the jetties with a row of interlocking steel sheet piling, thus making deeper dredging safe. By the former method an extra depth of 1 ft. would be obtained by every 2 ft. of extension, and by the latter method it is estimated that the increase in possible depth would be from 6 to 7 ft. No greater depth than at present can be obtained in the existing docks as the walls were not constructed so as to permit of deeper dredging.
(1) Channel.-The bars in the
(3) The cost of deepening the approach channel would be probably about 20 lakhs of rupees (133,33341.) including the removal of rock.
There are now moorings in the stream having a depth of
40 ft. (L.W.0.8.T.).
The channels are in places parrow and winding and a vessel of 1,000 ft. could not be brought up the river. The maximum length under existing conditions may be taken de 600 ft., and this maximum is not likely ever to be exceeded.
(2) Two more dredgers can be obtained within two years. It is impossible to say how long training works would take to construct as the matter has not been sufficiently examined. The provision of a greater depth of water at the jetties by either of the methods mentioned above would take some years as it would be necessary to work on one berth at a time in order to avoid excessive inconvenience to the shipping.
(3) The cost of two more dredgers may be taken as 186,667.
and the cost of working them at 14,8831. per annum. The cost of extending the jetties into the river by 15 ft. is estimated at 231, 88. per lineal ft. of jetty. No estimate has been prepared for a greater extension. It is estimated that the second method above referred to would cost 91. 18. per lineal ft.
Colombo.
The channel and harbour could be deepened to 40 ft. (L.W.O.S.T.). The dredger last acquired is so designed as to be capable of dredging to 45 ft. (L.W.O.S.T.). There is at the present time mooring accommodation for two ressels of 1,000 ft, in length and of 100 ft. beam in the area of 107 acres near the Island breakwater, with an average depth of 33 ft. (L.W.O.S.T.). This is the only portion of the harbour in which vessels of this aize could be moored without interfering with the scheme that is now being carried out. Assuming the harbour to be deepened to 40 ft. (L.W.O.S.T.) over the 36 ft. area which has been sanctioned, a quantity of 1,728,000 cub, yds. would require to be dredged; this would take about four years to complete. If the smaller area of 107 acres was deepened to 40 ft., a quantity of 718,000 cub. yds, would only have to be removed. If the present dredging scheme is carried out, the additional time required would be about two years
The approximate cost of dredging in the large area would be 109,000l. assuming that the new moorings would be suffi cient for this depth, and that of the smaller area of 107 acres would be 41,500
A 13220-App 856 &c
INDIA AND THE EASTERN COLONIES.
Hong Kong.
The gross revenue of the Harbour De- partment for 1914 was $579.443 = 53,5527. derived from boat and junk licences, light dues, &o. There are no port dues.
The eastern channel has a depth of 40 ft. and over (LW.O.S.T.) to within a short distance of Holt's Wharf, which has a depth of 32 ft. (L.W.O.S.T.). By extending this wharf a further 50 ft., a minimum depth of 40 ft, might be obtained. Kowloon Wharres have a depth of from 23 ft. to 27 ft. 6 ins., one of which is to be deepened shortly minimum depth of 30 ft. (L.W.O.S.T.). No'wharf or dock could at present take a 1,000 ft. vessel of 100 ft. beam, but Holt's have one under consideration which will fulfil these requirements. No scheme has as yet been prepared for the provision of deep-water quays by Government.
to
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Singapore.
143
85
Gross revenue for the year ended 31st
December 1914, $5,529,594.
The approach channel is already 40 ft. and upwards in depth (L.W.O.S.T.) and the scheme of reconstruction of the Main Wharf, at present in course of extension, will provide a considerable amount of wharfage with 40 ft. (L.W.O.S.T.) with accommodation for vessela 1,000 ft. long and of 100 ft. beam. It is anticipated that the works now in hand will be completed by the end of 1916.
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