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68
Certificates as to Water Supply.
The number of certificates issued during the year was 30, as
compared with 71 in 1909.
Drainage Work.
The by-laws of the Loudon County Council that require that
plans and written particulars of drainage construction and alteration
shall be deposited with the Sanitary Authority came into operation
in August, 1903, and from that date to the end of 1910 the Council
have approved of 401 plans for the drainage of new buildings, and
4547 plans for alterations, etc., to drains of existing premises.
During the year 1910, 927 notices of drainage reconstruction or
alteration were received, and in 838 cases the work necessitated the
deposit of plans and written particulars. In 516 of these latter cases the
work could not be delayed until the Council's approval of the plans had
been received; in each of these cases the prescribed "urgency" notice
was therefore submitted by the builders, the work put in hand forthwith
and the plans, etc., deposited at a later date.
Of the 838 notices of drainage alterations, etc., requiring the deposit
of plans, 335 related to work that involved the entire reconstruction of
the drainage system. In 503 of the 838 drainage cases the work was
carried out voluntarily, the number of instances in which voluntarily complete
reconstruction was carried out being 135. The voluntary work
was chiefly done in connection with the larger houses in Hampstead, and
in many cases the voluntary drainage reconstructions were of a very
extensive character.
Iron pipes are now chiefly used in drainage constructions and
reconstructions in Hampstead. Of the 335 reconstructions in 1910
iron pipes were used in no less thau 288 cases; in only 47 cases were
the drains reconstructed with stoneware pipes. It has been found that
iron drains are much more durable; in several cases in 1910, iron
drains that were laid upwards of 15 years ago were found perfectly
water tight on application of the water test.
Combined Drainage.
During the year several claims were made by owners of property
that certain defective combined drains were not legally "drains" for