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25
The Ilford district has four levels of sewers, the first being
by gravitation, which covers an area of 6,571 acres ; (the second,
that known as the "Roding Valley," whicih takes the sewage
from the Cranbrook and Loxford Wards (area 844 acres), is raised
from the low level at the Pumping Station adjoining the Baths
(into the high level or gravitation system) by means of four centrifugal
pumps, two 5in. and two Oin., connected to motors, the
power used being electricity (with two gas engines in case of the
failure of electricity).
At the Outfall Works a further Pumping Station has been
erected, comprising two semi-loco boilers and four centrifugal
pumps, two lOin. and two Sin.
The sewage from the part of the district east of Green Lane
and south of the Great Eastern Railway is connected to the
Pumping Station by two large receiving culverts. The northern
portion of this area, 400 acres in extent, known as the mid-level,
is connected to the Sin. pumps; the southern portion, known as
the low level, having an area of 688 acres, is connected to the
lOin. pumps; and the whole of the sewage is brought together at
the entrance to the screening chamber.
For dealing with the sludge two Shones' ejectors have been
provided. The sewage of the town is dealt with on what is
known as the partial system, there being taken into the soil sewer
all the sewage and rain water from the back roofs and yards.
The surface water system conveys the roof water from the front
roofs of all property and the water from the streets and roads.
No extension has been made to the Outfall Works during the
past year.
Owing to the City of London building scheme it has been
found necessary to make an extension of the sewer through
Valentines Park to meet the additional requirements.
4. Closet Accommodation.—In addition to the water carriage
system of sewerage, there are in the rural area 83 privies
and 56 pail closets. The cleansing of cesspools, privies and pail