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provides under all conditions a free outfall to the various sectional
sewerage zones into which the local system is divided. This fact
has allowed a thorough investigation to be made of the older
sections of the system and adjustments designed that will reduce
the load in various sections to that for which they were originally
intended before the development of the Greater Harrow took
place.
The construction of a 30-inch outfall main measuring 1,250
yards from the Edgware Road to Honeypot Lane where it connects
to the County Council's trunk sewer has now been completed and
is in operation. This sewer now takes all the load of the zones
north of Whitchurch Lane and affords a positive relief to all sewers
south of that lane, which were previously severely overloaded.
During the course of the construction of this sewer it was decided
to extend its service by the provision of a deep level sewer in the
Edgware Road which, in addition to affording relief to the existing
sewer, would serve the new development of the Cannon's Park Golf
Course. This sewer is now completed and in operation. It is
15 inches in diameter and measures 1,260 yards and is laid at an
average depth of 30 feet approximately.
The electrically operated pumping station at South Vale
Avenue, Sudbury, which replaced the ejectors operated by the
Bessborough Road Air Compressor Station, is now well into its
second year of service and its operating costs are showing a very
considerable economy over the previous system. Considering the
height to which the sewage is pumped (80 feet) the estimated cost
of 23s. Od. per house per annum, which has not been exceeded, is
very low.
Work is well advanced on the preparation of a new main
sewerage scheme for the Pinner-Hatch End area. This scheme
will be on similar lines to the Moat Farm scheme except that it
will deal entirely with sewage. A preliminary estimate of the
cost of this scheme amounts to £36,000.
Main Surface Water Drainage.
The County Council are responsible for the maintenance of
main watercourses in the district and as these become culverted
the culverts vest in the Council as surface water sewers. The
Thames Conservancy Board have now assumed responsibility for
the maintenance of the River Pinn and its watershed from where
it enters the district to the Royal Commercial Travellers' Schools
at Hatch End and to its northern tributary as far as Nugent s
Park off the Uxbridge Road. Both the authorities concerned
are engaged upon improvement works which will eventually reach
this district when the lower reaches of the watercourses have been
dealt with. These works will especially affect the well-being of the
River Pinn and the Yeading Brook.