Sea-level canal

“ All of the evidence, all of the supplementary expert testimony which may be obtained upon the merits of the two propositions, will not change the position of those who rest their conclusions upon American experience and upon the judgment of American engineers, and who favor a lock canal. While there is no doubt that such a canal can be constructed and can be made a practicable waterway, there is a very serious question whether a sea-level canal can be constructed and made a safe and practicable waterway, at least within the limits of the estimated amount of cost and within the estimated time. ”

“ Engineers of the highest standing at home and abroad have expressed themselves for or against one type or the other, but it is a question upon which no complete agreement is possible. In theory a sea-level canal has unquestionable advantages, but, practically, the elements of cost and time necessary for the construction preclude to-day, as they did in 1894, when the New Canal Company recommenced active operations, the building of a sea-level canal. ”

“ It can take care of 80,000,000 tons of shipping a year, and, by the expenditure of less than $25,000,000 additional, can increase this capacity by at least a third. It can pass at least 48 ships a day, doing all that a sea-level canal could do, and many things that a sea-level canal could not do. ”

“ It is true that no canal has been carried, like the Callao, Lima, and Oroya railroad, in Peru, to the height of nearly sixteen thousand feet above the level of the sea. [24] It has, however, on the Languedoc and other canals been found easily feasible to carry a canal to a height of 600 to 1000 ft. above the sea. Canal engineers have not, perhaps, pierced the Alps with a tunnel ten miles in length, as on the Saint-Gothard Railway; but they have carried a tide-water canal from the Mediterranean to the Red Sea, and they have essayed to perform the same feat through the Cordillera. ”

“ It is very doubtful if even Parliament, had it possessed the greatest foresight, could have forced, or have persuaded, the canal companies to construct locks of precisely the same dimensions at elevations of 400, 500 or 600 feet, where water was difficult to get or costly to pump, as on canals more or less on the sea level, and deriving an abundant water supply from mountain streams or navigable rivers. ”

“ The canal is navigated by vessels of 70 tons, and steamers of 45 tons and 25 h.p. The traffic amounts to about 4000 vessels per annum. It was completed in 1868 at a cost of 81,500l.
The Kinda Canal rises 171 feet by fifteen locks to a level of 277 feet above the sea. The length of the navigation is 491⁄2 miles, of which 223⁄4 is either artificial canal or trained river. The length of the locks is 90 feet 6 inches, breadth 18 feet 4 inches, and depth over sill 4 feet 101⁄2 inches. The traffic is from 3000 to 4000 vessels per annum. ”

“ The existing canal only accommodates small vessels, and the entire journey is by no means a rapid one, for there are more than a hundred locks to be encountered, which gradually raise the boats to a level of nearly eight hundred feet above the sea. ”

“ Any attempt at a general revival and improvement of the canal system throughout England cannot prove financially successful, as local canals, through thinly populated agricultural districts, could not compete with railways. These routes alone should be selected for enlargement of waterway which lead direct from the sea to large and increasing towns like the proposed canal from the Bristol Channel to Birmingham, or which, like the Aire and Calder Navigation and the Leeds and Liverpool Canal, are suitably set for the conveyance of coal and general bulky goods to populous districts. ”

“ Thus the works taken over by the United States in 1904 were available for any type of canal, and the decision to adopt the 85-foot-level was not taken until 1906. Even now, or in April, 1908, at the time of my visit, when so much work has been done upon the locks, many of the rank and file of the employees still cherish the hope of a tide-level canal, and there are not wanting well-informed people, both on the Isthmus and in the States, who, while accepting the high-level scheme as inevitable, regard a tide-level canal as essentially a better thing. ”

“ This enormous gain in efficiency, resulting from the avoidance of the slightest difference in level and from the reduction of force wasted in friction, suggested to people in early times the idea of establishing channels for water where none had previously existed, that is, of building canals. Locks, for controlling the flow and level of the water, were invented toward the end of the Middle Ages, and a considerable extent of canals had been constructed on the Continent before the Bridgewater canal, described above, was opened in England. ”

“ The exigiencies of their trade calling imperatively for further improvements, the engineers furnished them with the design for a new ship canal, which reduces the navigable distance to 151⁄2 miles, on a course about west from Amsterdam to the North Sea, available for larger vessels than formerly entered the port—and has provided a new harbour on the coast, with an area of 250 acres, bounded by breakwaters formed of concrete blocks set in regular courses, with 853 feet of entrance between the pier heads, and 261⁄4 feet minimum depth of water. ”

“ For the purposes of the projected Sheffield and Goole Ship Canal it is proposed to acquire several of the old navigations, including the Dearne and Dove Canal, the Stainforth and Keadby Canal, and other waterways. Other improved canals have been suggested, and Mr. Samuel Lloyd has advocated the construction of a great national canal which would connect all the principal industrial centres of the kingdom with each other and with the sea. There appears to be no insuperable difficulty in the way of realising such a project. Capital alone is wanted. ”

“ Admiral Spratt, ten years later, came to the same conclusion as Stephenson, but both were opposed by M. de Lesseps, who, in his final plan, resolved upon a dead level canal for the whole distance of 103 miles.
The plan ultimately adopted has no doubt been the most advantageous to commerce, inasmuch as it has facilitated the time and labour involved in passing vessels through the canal. It has, however, necessitated a [250] considerable annual outlay for dredging. ”

“ But upon the proposal as just stated there are two important remarks to be made—the first, that the suggested expenditure of 12,000l. per mile would only give us canals adapted for the navigation of large barges or vessels of not more than 150 to 200 tons, whereas what is chiefly required is internal water communication that would enable an ordinary merchant steamer to sail right up to Birmingham, Leeds, Bradford, and other large towns; the second, that no such maritime ship canal has hitherto been constructed for less than 120,000l. per mile, including all contingencies. ”

“ Here the Bay of Quinte approaches the lake so close, that a canal of four or five miles only is requisite, through a natural level, in order to have a safe and sheltered voyage from Kingston without going at all into the real and dangerous lake, which is every where beset with "ducks and drakes," as its rocky and treacherous islets are called.
This canal, which may be constructed easily for about five and twenty thousand pounds, must soon be made, and the bar of Presqu'ile Harbour deepened, so as to ensure a shelter for vessels in the furious gales of October and November. ”

“ For reasons which will be indicated later on, it is impossible to improve the Black Country canals on any large scale; but, in addition to what I have already related, the London and North-Western Railway Company are constantly spending money on small improvements, such as dredging, widening waterway under-bridges, taking off corners, and putting in side walls in place of slopes, so as to give more space for the boats. In the latter respect many miles have been so treated, to the distinct betterment of the canal. ”

“ Our concern is with a matter of fact, and not with a theory. No ship-owner on the Great Lakes considers it a serious hindrance to navigation for vessels to pass through the lock of the "Soo" Canal; no shipper running 1,000-ton barges through the future Erie Canal will have the least apprehension of danger or destruction; no captain navigating a vessel or boat through the proposed deep waterway from the ocean to the Lakes will hesitate to pass through locks with a proposed lift of over forty feet. ”

“ Longer canals have been made both in Europe and in the United States, but no canal hitherto completed has been built of the same large dimensions, nor has any other canal cost so considerable a sum of money. It is not too much to say that no other waterway has been more important to commerce, nor has any other been attended with the same momentous and permanent political consequences. It is satisfactory to be able to add that few waterways of modern times have been so successful from a financial point of view. ”

“ The minimum width at bottom is 120 ft., allowing large vessels to pass each other at any point on the canal; this width is considerably increased at the locks and other parts. The slopes are generally about 11⁄2 to 1, but are flatter through some portions; in rock-cutting the sides are nearly vertical. From Eastham to Runcorn the canal is alternately inland and on the foreshore of the estuary, on which embankments were constructed to act as dams and keep out the tide during the excavation of the canal, and afterwards to maintain the water-level at low water in the estuary ”

“ Then again, the speed on British canals can seldom be carried above 21⁄2 miles per hour, not to speak of the delay in getting through the locks, of which there are ninety-three between Leeds and Liverpool.
It would be the idlest of idle dreams to expect that the canal system of this or any other country, as originally constructed, can be resuscitated, or even temporarily galvanised into activity, in competition with railways. Canals as they were built a century ago have no longer any function to fulfil that is worthy of serious consideration. ”

“ Lloyd thinks that the heavy cost involved in constructing canals of sufficient size to pass craft suitable for coasting and short continental voyages would be fatal to cheap conveyance.
The largest locks hitherto constructed are those on the St. Mary’s Falls Canal, in the United States, and the Welland Canal in Canada. On the former canal the lock opened in 1851 is 515 feet in length and 80 feet wide. The great tidal lock at Eastham, on the Manchester Ship Canal, will be 600 feet long and 80 feet wide. ”

“ With regard to the construction of canals, that must be regulated by the quantity of trade to be passed, and the charges that it will bear; but, within certain limits, the larger the canal the better. In the case of ship canals for seaborne vessels, it is advisable to construct them wherever they can be made at a reasonable cost, and there is traffic enough to pay a fair interest upon the capital. ”

“ The canal is about fifty miles in length from deep water in the Caribbean Sea to deep water in the 92 Pacific Ocean. It ranges in width from 300 to 1,000 feet with an average bottom width of almost 700 feet. The Gatun dam along its crest is 8,000 feet long.
The construction of the canal is considered one of the greatest feats of engineering of all time and was accomplished at a tremendous cost. The land was secured by treaty from Colombia at great expense and resulted in considerable trouble between the United States and the South American republic. ”

“ Some of it has been utilized in reclaiming land; much has been carried out to sea and heaped into a break-water three miles long, which runs out from the Panama or southern end of the Canal, and will check a coast-ways current that might, if uncontrolled, silt up the approach. The Canal is a triumph, not of man's hands, but of machinery. ”

“ Deep-water quay walls of considerable length have been built; warehouses for general merchandise, with an excellent system of hydraulic cranes, have been provided; a large grain depôt, fully equipped with grain elevators and other appliances, has been constructed at a cost of £80,000 to facilitate, more especially, the considerable grain transport by canal that is done between the River Mersey and the Chester district; and at the present time the dock area is being enlarged, chiefly for the purpose of accommodating deeper barges, drawing about 7 feet of water. ”

“ How great the traffic already is and with what strides it grows is well known. Its capacity can at any time be doubled by lighting it with electricity, but at present vessels are compelled by rule to lie still after sunset. All is dead through the night. In a few years this will be changed; and indeed the canal must be widened ere long and made a double track throughout to accommodate the continual stream of ships plying between the East and the West. ”

“ With abundant water power at the several locks and the dam, there is no reason why the whole canal should not be sufficiently illuminated by electric lights; and with beacons and range lights in the river and lake, vessels can travel at all times with perfect safety. The estimated cost of the canal is 64 millions of dollars, or 13,000,000l. ”