‘REPORT ON THE ADMINISTRATION OF THE BOMBAY PRESIDENCY, FOR THE YEAR 1919-20’ [‎265r] (77/192)

1919-1920.] MUNICIPAL AD MINIS TEAT 10 N. 53 Chapter III.
PROTECTION.
9 . A comprehensive scheme for the drainage and sewerage of the made- Drainage,
quately drained districts of the City, to improve the present system and to pro
vide adequately for future extensions was prepared. This scheme involves the
transference of the main outfall to the locality in the north-east of the Island
suggested by the Bombay Development Commission in their first report. It
does not contemplate the abandonment of the Love Grove Pumping Station
and outfall works, though it renders it unnecessary to extend the new outfall
under construction more than a very short distance seawards. The outfall is
proposed to be retained as an emergency outfall for use only in the monsoon
when the amount of sewage rises to four times the normal flow. The beam
engines in the new Pumping Station at Love Grove worked fairly satisfactorily
during the year. The most difficult and dangerous section of the new outfall
at Love Grove was satisfactorily completed. The main rock barrier has been
cut through and the twin barrel sewer now discharges into deep water at a dis
tance of 2,018 feet from the engine house. The position reached was consi
dered a suitable one at which to stop operations pending the discussion of the
proposed improvement, extension and modification of the sewage system of the
City and the probable transference of the main outfall to and beyond the north
east of the Island. During the working season the state of the sea was most
unfavourable for carrying on the work. Labour was scarce during the year
which hampered the work to a certain extent. The Boad Branch was supplied
with 3,587 tons of metal and rubble by the outfall quarries. The machinery
at the Air Compressor Stations at Love Grove and Colaba and the ejectors
connected with these stations worked fairly satisfactorily during the year. At
the Colaba Station the Steam Plant was used for some time and consumed
about 100 tons of coal. The storm water sluices at Love Grove, Worli and
Dharavi were repaired. Of 14 of the larger works of providing storm water
drains undertaken during the year, 11 were wholly and 3 partially completed
at a total approximate cost of Bs. 2,50,652 and Bs. 32,793, respectively. Of
4 pipe sewer works undertaken, 3 were completed at a total cost of about
Rs. 10,038 and one is being carried out departmentally. Minor new works and
works of repairs, alterations, etc., were carried out at a cost of about Bs. 1,28,875.
The work of constructing the ovoid sewer from Matunga Station to the north of
Radar Station was nearing completion, the total expenditure incurred up to the
year being Bs. 2,40,405. The work of extending northwards the ovoid sewer
from Matunga to Dharavi was carried out to the extent of Bs. 1,10,730. The
open drain from Kalachowki Boad to Arthur Boad was covered at a cost of
Rs. 20,884. About 32 out of 120 miles of pipe sewers, 12 out of 13 miles of
ovoid main sewers and 34 out of 154 miles of storm water drains were cleaned,
the quantity of silt removed being 1,866,159 and 8,846 tons, respectively. One
thousand nine hundred and twenty-five tons of silt were removed from catch-
pits on main and pipe sewers. Three hundred and thirty-two sullage connec
tions and 123 storm water connections were made during the year.
10. The rainfall at the Tansa and Tulsi Lakes was above the average Water-supply,
of the last five years by 5 per cent, and 24 per cent., respectively. The rainfall
at the Vehar Lake was 9 percent, below the average of the last five years.
Only the Tansa Lake overflowed. Vehar Lake was never more than half-full,
and the demand for water was considerably in excess of the supply available.
A serious burst occurred in the Tansa aqueduct. Prompt measures were taken
to repair it and to restore the supply. Arrangements were made for the acqui
sition of the whole of the catchment area in private occupation for the protection
of the gathering grounds of the Tansa lake. The preliminary survey in con
nection with the extension of the Tansa supply was completed and the work
of excavating the foundations for a dam across the Horse Shoe Valley at Ghat-
hoper to form a storage reservoir was in progress. The construction of mecha
nical filters at Tulsi and the works, viz., raising the dam, the installation of
^Ping and filtering plant and the laying of distribution mains for utilizing
hie Powai lake for the supply of water to Salsette, were in progress throughout
e fair season, but they were considerably hampered owing to labour trouble,
concrete roof over Beservoir No. 2 at Malabar Hill was completed and the
W 0 e area converted into a public garden.
1L There were 6,899 gas lamps and 1,195 kerosine oil lamps at the end Public lighting
ot lhe year, being, respectively, 217 and 21 more than in the previous year.
H 923-*-14;
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