Communications and Reports in Relation to the Surveys of Boston Harbor

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Page 36 - ... injure the main channel. The ' sea-walls that have been built by the United States on these islands, have been very useful; -but the appropriations of late years have been insufficient to accomplish what is absolutely necessary. In the words of the United States Commissioners, in their second report : " The time is approaching, when those who are responsible for the" preservation of Boston Harbor, must make up their minds, either to abandon the lower harbor to its fate, or to make application...
Page 47 - Regret is sometimes expressed that so large a quantity of the tidal marshes and mudlands should have been filled during the present century. But this operation was the necessary concomitant of the growth of the city, and indeed the very mode of its prosperity and increase. The statesmen and political economists of the day would not have hesitated to sanction and encourage the schemes of aggrandizement of enterprising and sagacious projectors, even if they had foreseen that one of their results would...
Page 16 - FGS, #c.* r|"'HE existing state of any estuary, or tidal river, may be •*• considered as an adjustment, for the time, of certain conditions, changes in any of which conditions effect alterations in that state, productive of injury or benefit to the purposes for which we employ, or may be desirous of employing, such estuary, according to circumstances. The action of...
Page 22 - Wherever a dam, bridge, or weir has been built across a river, it has been observed that the alluvial deposits, whether of sand or mud, brought up by the flood, accumulate very rapidly, — particularly in the neighborhood of the obstruction; and in this way, a quick and sensible diminution of water capacity takes place.
Page 42 - ... much less as may be found most advisable, a sufficient amount of water for Charlestown or Chelsea may be diverted, and the balance of retained fresh water thrown in in aid of the increased tidal waters at such time of the ebb as experience and investigation...
Page 82 - Had the observations been continued for a longer period, or for a year, so as to bring into the account the neap tides, and the seasons when the height of the pond is such that no current can pass into it from the river, this average would doubtless be much less.
Page 61 - ... nothing may be wanting to assist him in his laborious task, we append herewith the entire Report of Mr. Mitchell, with the accompanying maps, tables, and diagrams. They will be more valuable to him, because such observations are not easily made, and when made, can seldom be so ably discussed. We have the honor to be, very respectfully, Your most obedient servants, Jos. G. TOTTEN, Bt. Brig. Gen.

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