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38
For the past two years the Company have obtained a supplemental
supply of water from the Metropolitan Water Board to meet
the constantly increasing demands due to the unprecedented
growth of houses in their District: the major portion of the water
thus purchased is consumed in Ilford.
It is hoped that by the end of the present year the Stour
Works will be sufficiently advanced as to allow of a supply of water
being furnished, although the whole of the works will not be
completed till a somewhat later date.
Mr. Bryan, the Engineer to the South Essex Waterworks
Company, has kindly supplied me with the following short description
of the Scheme:—
"The Scheme is authorised under the powers contained in the South Essex
Waterworks Act, 1928.
"The source of supply is the River Stour from which water will be
abstracted at an Intake situated near Langham Mill and will flow by gravity
through a 40 in. diameter pipe to the sump of the Langham Low Lift Pumping
Station.
"The water will be pumped thence through a 40 in. diameter main, about
650 yards in length, to a Sedimentation Reservoir and will flow by gravity from
the reservoir, through a 40 in. diameter main about 400 yards in length, to the
Primary Filters, where a preliminary process of rapid filtration will ensue. A
bye-pass main will be provided around the reservoir to allow of the water being
pumped direct from the Low Lift Station to the Primary Filters if required.
"After leaving the Primary Filters the water will flow (by gravity) to six
sand filter beds of the ordinary type and after being again filtered and chlorinated
will pass into the Filtered Water Reservoir. An outlet main of 40 in. diameter
will carry the water from the latter reservoir to the suction branches of the three
sets of pumping plant situated at the Langham High Lift Pumping Station.
"The water will then be pumped through a main 32 in. diameter and
slightly over 14 miles in length into a covered reservoir placed in close proximity
to the Tiptree Pumping Station, from which it will be carried to the suction
branches of the three pumping units by a short length of main of 36 in. diameter.
"The Tiptree Pumping Plant will pump the water thus received, through a
main 32 in. diameter and 9¾ miles in length to the Danbury Reservoir, the top
water level of which will be about 358 O.D.
"From the latter reservoir the water will flow by gravity through a main of
34 in. diameter and about 13¼ miles in length to the Company's Herongate
Reservoir, from which it will be supplied to the Company's District.
"The whole of the mains will be constructed of steel, coated internally
with a bitumen lining applied eentrifugally."