THE METROPOLITAN MAIN DRAINAGE WORKS. 
59 
through Belgravia, joining the Victoria sewer at Pimlico ; its 
course will be then along Victoria Street, through Scotland 
Yard, to Hungerford; then along the line of the Thames 
embankment and the new street by the river bank (the powers 
for making which were obtained from Parliament last session) 
to Cannon Street, whence it proceeds by Tower Hill, Back 
Road, Commercial Road, Limehouse, Bow Common, to a 
second pumping station at Abbey Mills, where its whole 
contents will have to be lifted 15 J feet, by an engine of 600- 
horse power, into an outfall sewer, through which the sewage 
will then run by gravitation parallel with the High and Middle 
Level Outfall sewers to Barking Creek. It will be seen that 
thus the High and Middle Level sewers flow side by side from 
Old Ford, 22 feet above datum, passing across the River 
Lea and under the Great Eastern Railway and the Stratford 
Road, to the Abbey Mills, and that thence there are three 
outfall sewers for the High, Middle, and Low Level sewages 
respectively, running together eastward, and carried, partly 
on embankments of concrete and partly on a viaduct of brick 
arches, over the low-lying marshy land of the districts of Plaistow 
and Eastham, for a distance of nine miles and a half to the 
Thames at Barking Creek, where there is a reservoir of ten 
acres in extent, divided into four compartments as a provision 
for repairs, cleansing, or accident. The sewage collected in 
this reservoir will be only allowed to escape after the turn of 
high water, the outward current of the river then carrying it 
for twelve miles further down, and being, in fact, equivalent, 
as far as the metropolis is concerned, to that additional length 
of drain. 
The drainage works on the south side of London are entirely 
distinct from those of the north side. The Effra Main Drain 
commences at an elevation of 90 feet at the Crystal Palace, 
and passes through Dulwich^ East Dulwich, Peckham Rye, and 
New Cross to Deptford, a distance of four miles and a half, 
where it is pumped into the Southern Outfall sewer. The 
Southern. High Level Main Drain commences at Clapham,. at 51 
feet above Trinity datum, running through Stockwell, Brix- 
ton, Camberwell, Peckham, and parallel with the Effra from 
Hatcham, through New Cross to Deptford; its length being five 
miles and a quarter. The Southern Low Level Main Drain 
commences at Putney, with a head of only 9 feet. Thence 
it passes through Wandsworth, Battersea, by Nine Elms to 
Kennington Oval, continuing along the Camberwell New 
Road by the side of the Surrey Canal, across the Old Kent 
Road by Peckham New Town, to the Pumping Station at 
Deptford Creek ; being joined near the Deptford Railway 
Station by the Bermondsey branch, running through Bother- 
