Sewers and Drains for Populous Districts: With Rules and Formulae for Determination of Their Dimensions Under All Circumstances

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New York, 1880 - 228 Seiten
 

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Seite 171 - London; the substitution of a constant, instead of an intermittent flow in the sewers ; the abolition of stagnant and tide-locked sewers, with their consequent accumulations of deposit ; and the provision of deep and improved outfalls for the extension of...
Seite 207 - ... all loss or damage arising out of the nature of the work aforesaid, or from the action of the elements, or from any unforeseen obstructions or difficulties which may be encountered...
Seite 219 - Any unfaithful or imperfect work that may be discovered before the final acceptance of the work shall be corrected immediately on the requirement of the Engineer, notwithstanding that it may have been overlooked by the proper Inspector and estimated.
Seite 171 - According to the system which it was sought to improve, the London Main Sewers fell into the valley of the Thames, and most of them, passing under the low grounds on the margin of the river before they reached it, discharged their contents into that river at or about the level, and at the time of low water only. As the tide rose it closed the outlets, and ponded back the sewage flowing from the high grounds ; this accumulated in the low-lying portions of the sewers, where it remained stagnant in...
Seite 178 - The result of these observations distinctly establishes the fact, that the quantity of rain which flowed off by the sewers was, in all cases, much less than the quantity which fell on the ground ; and although the variations of atmospheric phenomena are far too great to allow any philosophical proportions to be established between the rainfall and the sewer flow, yet we feel warranted in concluding, as a rule of averages, that...
Seite 216 - If any person employed by the contractor on the work shall appear to the Engineer to be incompetent, or to act in a disorderly or improper manner, he shall be discharged immediately on the requisition of the Engineer, and such person shall not again be employed on the work.
Seite 185 - Tho sewer is provided with storm overflows into the river. The Low Level Sewer, besides intercepting the sewage from the low-level area of 11 square miles, serves also as an outlet for a district of 14} square miles, the western suburb of London, which is so low that its sewage has to be lifted at Chelsea a height of 17.

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