Henry C. Adams
Capitolo 56
10-1/2 ds. x 1000
sewers are----------------= 5.6, say 6d. for 1,000
1875
braids.
If sewage had to be pumped, the additional expense to pump from
at reason for the quantity increased of water of surface can be looked
to from different colons of sight:--
1. The clean cost of the gasoline or the other fuel or current electric
consumed in to lift the water.
2. The cost of the fuel consumed more wages, shops, etc. and
a proportion of the sum forced to refund the cost of capital of
the station that pomp and apparatus.
The additional expense of the sewers to bring the additional quantity
of water of storm would also be considered working out
and preparing respects for the alternative schemes.
The actual cost of the fuel can be taken to approximately 1/4
d. for 1,000 braids. The annual jobs and positions of capital,
exclusive of fuel, you/he/she should be separated from the normal quantity of
sewage pumped a year, rather than from the quantity of maximum
what the pomps would lift if theirs were able to race
continually during the whole time. For a city of approximately 10,000
inhabitants that these positions can be takings to 1-1/4 ds. for 1,000
braids that the total costs do to pump, included of
capital debits, 1-1/2 ds. for 1,000 braids. Even if the extra
costs to widen the sewers it is assistant to this sum it anchors desire
both notably under the sum of 6 ds. what it represents the
costs to offer a separate system for the water of surface.
Unless it is permissible for the sewage to have free a result
to the sea to all the states of the tide, the provision of
real floods of storm are a matter of the supreme importance.
Not only it is it necessary for them to be built well in-
considered positions, but they has to be real in action. A
dam built along a side of a road trap door and makes parallel to
the sewer is rarely efficient, as in durations of storm the liquid
in the trips of sewer to a considerable speed and the
greater portion of him that the rushes you/he/she should be diverted past