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ing the whole of this supply with an area of 4,270 square yards.
The yield of this well is about 1¾ million gallons daily, with a
minimum of under 1 million gallons.
The Waddon Well was established in 1899 and comprises
two bored wells each 200-ft. deep and lined with cast-iron cylinders
to a depth of 70-ft. from the floor level, below which they are in
bare chalk.
There are no headings. The water obtained from this well is
limited by Act of Parliament to 50 million gallons in a period of
thirty days.
The Stroud Green Well was established in 1905 and comprises
a well 391-ft. deep and lined with cast-iron cylinders to a depth of
144-ft., below which it is in bare chalk. A borehole is put down
for a further distance of 146-ft., making the total depth 537-ft.
Headings are driven at 230-ft. and 365-ft. down to a total length of
1,407 yards. The yield of this well is about 650,000 gallons per
day.
The Selhurst Well was purchased from the Metropolitan
Water Board in 1922. It had not been used for a number of years,
but new pumping plant has been provided and water is now being
pumped into the town's supply. The depth of this well is 385-ft.
and it is lined with brickwork (90-ft.) and cast-iron cylinders (88-ft.)
to a depth of 178-ft., below which it is bare chalk. Headings are
driven at depths of 218-ft. and 358-ft. from the top of a total
length of 1,264 yards. The yield is about 500,000 gallons per day.
The Surrey Street Works is in the centre of the town and has
always been surrounded by houses. Pumping never ceases and a
good and pure water is obtained. The water from each pumping
station is analysed each month and always found to be of excellent
quality and has no plumbe-solvent action.
RIVERS AND STREAMS.
The River Wandle, Norbury Brook (the head of the River
Graveney, a tributary of the River Wandle), and the River
Ravensbourne all take their rise in the Borough.
The sewerage of the Borough is on the partially separate
system; consequently these streams are all utilised for surface
water drainage purposes.