The Express.
London, England, 1862-10-22 00:00:00

SOUTHERN DRAINAGL

The works for the drainage of the eouthern side of the
river are briefly as follows :—The Southern High-level Sewer
comprises the construction of about 9 miles 4940 ft. of
newer, varying in size from 4ft. Gin. by aft. to 1001. Gin. by
10ft. Gin., at depths from 10ft. to 50ft from the surface of
the ground. ►t commences at High-street, Clapham, and
extends to the pumping station at Deptford-creak. The
engineer's estimate for the work was 212,4371.,
the contract price 217.000/. The value of the
work executed up to the sod of June, 1861, was
92,000/.. mid the value up to the 30th June last,
about 170,0001. In connexion with this work is the exten-
sion of the F.ffra, or Dulwich breech. This consists of
the construction of sewers, varying in sin. from
61 X barrel, to aft. by 211. egg shaped, about 3 miles
in length, sod will extend from Dulwich to Crown.
bill, and Westow.hill, Norwood. The eogineer's esti-
mate for the whole. was 20,000/., the contract was taken
at 18,0(71. The value of the work executed up to the
end of June last was about 4,0001. The works at the
Deptford Pumping Station, embrace two contract., one
for the engine and boiler houses, including furnaces,
chimney shaft, coal shed., ke., a wharf wall in trout of the
works next Deptford-creek. and • tow short lengths of
sewers, some of which serve to connect the low-level sewers
with the pump well, and to deliver the sewage, when lifted,
into the outfit!l sewer, and others to connect the high-level
sewer from Clapham and Dulwich directly with the outlet!
sewer. The engineer's estimate for them works was
116,0001., and the contract was taken at 113,1361. The

value of the work execute& during the Year uP
the 30th Julie last was about 78,(Ct The other
cootract comprises the pumping engines, which are to be of
500-horse power collectively, with the oecamary boilers,
pumps, and other machinery. The engineer's estimate for
the work was 22,0004, and the contract was taken at
22,3001. About three-fourths of this were oompleted during
the peat year, and the amities and machinery are now being
' debarred ca the ground, fur the purpose of being fixed.
The eouthers outfall sewer comprises the construction of
about seven miles 2,240 feet of sewer, 11, feet in diameter,
at depths varying from 17 to 80 feet, with • fall of
2 feet per mile, and extends from Deptford-creek,
where it is connected with the Deptford Pumping
station to Erith Marshes, and will, after receiving the con-
tents of the high-level sewer at Deptford-creek by gravita-
tion, and those of the low-level sewer through the Dept-
ford pumping engines, convey the whole of the southern
drainage through Greenwich under Woolwich, and across
the Erith Marshes to Half-way-Resch, at a point about 14
miles below London-bridge, The sewage will then be raised
by pumping engines into reservoirs, and discharged into the
river, in the same manner am that on the north side, during
the first two hours and a half of ebb tide. The engineer's
estimate for this work was 291,0001., the contract price
300,0001. The amount of work executed up to the end of
June, 1881, was 174,0001., sod the work has since
bees completed at a total cost of about 300,0001. The
works at the southern outfall, or Crossness pumping station,
embrace two contracts, one for the pumping engines, with
the necessary boilers, pumps, and machinery,consuitlng of
four double-acting condensing and rotative engines of 125-
horse power, working ri pumps each, the lift varying from
10 to 34 fret. The engineer's estimate for this work was
45,0001., and the contract has been taken at 44,9011. The
other work at the Southern Dothan consists of the erection
of an engine house, boiler house, chimney-shaft. coal-sheds,
dwelling-houses, reservoirs, river wall, and sewers, to and
from the pumps. The enineer's estimate for this part of
the work was 312,000/., and the contract has been taken for
300,0001. These works are now in progress. The work
remaining to complete the southern intercepting drainage is
the low-level sewer, to extend from High-streqg. Putney, in
an easterly direction, to the pumping station at Deptford, a
distance of about 91 miles, with a branch from the Spa-
road, Bermondsey, called the Bermondsey branch. This
latter work includes the portion of the main line below the
junction, consisting of about 2 miles 3,142 feet of sewer,
varying in size from • double line of sewer, 7 feet by 7 feet
each to a single lineof sewer 5 feet in diameter, with • fall
of about 4g feet per mile, and bas beep submitted to public
competition. In carrying out the works adverted to, large
bodies of water were met with. In one place it beams
n . to pump to the extent of 8,000 gallons per minute,
being • t double the supply of the Kent Waterworks
Company. Peat, loam, and other treacherous soils pre-
sented themselves, and other difficulties occurred, which at
times suspended the progress of the works; but these have
been successfully overcome by engineering akin, combined
with the mechanical appliances of the costractore.