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Thus in the Northern part of Wanstead the greater part of the
surface-water is collected by the brick conduit of 3 ft. 6 in. diameter,
which extends from the Eagle Pond overflow eastwards through the
Cowley Road and Nightingale Lane depression, across Nightingale
Farm to the river Roding. Lower down, into the same river, various
discharges of surface-water take place, as e.g., into the ditch on the
east side of Redbridge Lane, below the Rectory.
Turning now to the sewage system, the main outfallsewer
(2 ft. 4 in. by 3 ft. 6 in.) of Wanstead runs from the
northern boundary in a southerly direction through the fields
of Nightingale Farm at the rear of the houses on the east side
of Buckingham Road; it strikes Redbridge Lane at the right-angled
bend below the Rectory, traverses Wanstead Park, and terminates at
the Sewage Farm on the north side of the City of London Cemetery.
It collects on its way the whole of the sewage of Wanstead, with the
exception of the Aldersbrook and Lake House Estates; these have an
independent main sewer of 18 in. diameter following the route—Wood.
lands Avenue, Northumberland Avenue, to the Sewage Farm.
WANSTEAD SEWAGE DISPOSAL WORKS.
I am indebted to your Consulting Surveyor, Lieut.-Colonel C. H.
Bressey, F.S.I., for the following description of the new Works at the
Sewage Farm which were completed in 1915 :—
"On 24th July, 1915, took place the formal inspection of the
recently completed additions to the Sewage Disposal Works which can
now claim, thanks to the skilful design of Messrs. Willcox & Raikes,
to embody the most modern developments of sanitary science.
" The new scheme comprises the Construction of new detritustanks
(24 ft. by 18 ft.) with mechanical screens, the sub-division and
improvement of the old septic-tanks, the formation of a Dortmund
humus-tank (24 ft. by 24 ft.), the building of percolating filters (total
area 200 ft. by 180 ft.) with four electrically-driven travelling distributors,
the building of two motor-houses for same, the laying of a
21-in. outfall-pipe from filter to river, the sinking of a deep sludge-well
to receive the sludge from tanks by gravitation, the laying out of five
sludge-lagoons each 90 ft. by 40 ft., the provision of a 4-in.
"Stereophagus" pump for the lifting of sludge from well to lagoons,
the improvement of the old storm tank (470ft. by 20 ft.) so as to
increase its filtering efficiency, while facilitating the removal of sludge
by the installation of a portable "Stereophagus" pump, the erection
of a Manager's office, tool shed, store sheds, and finally the laying out
of paths and roads around the new works. The practical results of