TO CORRESPONDENTS
J-—We can only at present answer your question inferentially, that there may be salt water at London bridge during high water, at spring tides at any rate. The rise of the tide in the Thames River at this bridge is about 17 feet, or at the extreme springs about 22 feet. The limit of the tide is at Teddington, about 18 or 19 miles above London Bridge, but this is by reason of the lock (the lowest), by which the navigation of the Thames in its upper part is kept up. Below London the Thames receives the waters of several rivers—the Ravensbouvne, the Lea, the Darent, and last and longest the Medway. No doubt the tide backs up much of these freshwater rivers, but there must be a large mixture of sea or salt water at London Bridge where the tide rises to twice the ordinary depth of the river. At neap tides the stream generally runs up past St. Katherine’s Docks from 25 to 40 minutes after the flood tide has made its mark. It may be interesting to mention that the highest tide ever known was on the 18th of January, 1881, when the depth of water on the outer cill of St. Katherine’s Dock was 32ft. Bin., and on the inner cill 28ft. Bin., or 4ft. 10in., above Trinity High Water Mark.
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Bibliographic details
Kumara Times, Issue 2907, 22 February 1886, Page 2
Word Count
227TO CORRESPONDENTS Kumara Times, Issue 2907, 22 February 1886, Page 2
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