The
Finishing Touches
Branksome Chine Beach
Since the beach replenishment project was
completed in January it has become necessary to extend the outfall pipe at
Branksome Chine.
 The flows through the outfall originate
from the Branksome Chine stream and the surrounding surface water drainage
system. Flow volume increases rapidly during heavy rainfall and the
outfall needs to be able to take the water out to sea.
The existing outfall is 50m long,
constructed from an 800mm diameter steel pipeline encased in concrete and
supported on both sides by interlocking steel sheet piles.
 It is
buried beneath the sand and whereas it previously reached
the sea it is now some 20m short and unable to function efficiently.
Where it is discharging at the beach it is creating an area of soft sand
and deep water (see above - the pole & red 'topmark' marks the end of
the existing outfall).
A
special license was granted by Defra and local contractor
Jenkins
Marine arrived on site on 19th June to extend the pipe by a further
48m. The project was completed and contractors left site on 6th July.
For
safety reasons we also 'topped' the groynes where
they were protruding above the new sand. They were cut down
to
approximately
6-9" below sand level. |
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