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34
Fluoridation. It is unlikely that any progress will be made in
regard to introducing fluoridation of water supplies in this country until
the results of the Ministry's trials are available. The tests which are
being carried out in Watford, Anglesey and Kilmarnock end in 1961.
DRAINAGE AND SEWAGE DISPOSAL
The soil sewage from this district flows to the West Middlesex Drainage
Works at Mogden. Surface water finds its way out of the district
by the various water courses. The Annual Report for 1954 set out the
arrangements for the disposal and treatment of the sewage of the district
and the drainage.
Soil Drainage. When the proposals for the construction of a new
relief soil sewer in Pinner were considered, it was anticipated that at least
two contributory relief sewers would be needed. The continued development
of the area of Pinner Wood Park Estate and in Hatch End is causing
surcharging of the existing sewers with resultant flooding. The first of
these contributory sewers then is one from a point near the junction of
Uxbridge Road with Paines Lane, being laid under Woodhall Avenue
and Barrow Point Avenue, to discharge into the new relief sewer at the
junction of Barrow Point Lane and Avenue Road.
Flooding. There are certain parts of the district which are liable
to flooding when the rainfall has been especially heavy. In extreme cases,
because of the interference with the flow in the sewers, soiling occurs not
only with surface water but with sewage. Following the storm of the
night July 10th/11th complaints were received from the residents of
houses in the following roads that their premises were flooded:—Elliot
Drive; Station Road, Wealdstone; Sweetmans Avenue; Waverley
Road; Yeading Avenue; Greystoke Avenue; Carlyon Avenue and
Corfe Avenue. In some instances there was fouling by sewage.
Towards the end of March, complaints were coming in from the
occupants of houses in Brook Drive and Headstone Gardens about
flooding of their gardens. The trouble arose through the drains not
emptying because the sewers with which they communicated were running
full. The ultimate remedy is the construction of the new relief soil sewer
in Wealdstone, a proposal mooted for some years. As a temporary
measure to afford relief, the North Harrow sewer was connected with the
Wealdstone foul main drainage system. This measure brought relief to
the immediate and urgent problem facing the householders in that locality,
though it is a relief which might be bought at the expense of more general
flooding in times of heavy rain. At the same time, those industries whose
effluents are taken by the sewers, on being approached by the Borough
Engineer, took steps in the interest of water economy, to reduce the flow
rereaching the foul sewers. These measures were sufficiently successful
that no further flooding took place at these houses. In June, an Inspector
of the Ministry of Housing and Local Government held an enquiry into
the Council's proposal for the construction of the relief foul sewer in