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Tydd
Pumping Station
Designed by R.B. Grantham, Son and
Farran in 1936 and commissioned in 1937/39, being capable
of discharging 800 T/min. The diesel pumps were specified
to lift 200 T/min. against a head of 16.5 feet driven by four
horizontally opposed cylinder engines of 360 h.p. running
at 267 r.p.m.
The engine slab and building is carried
on 40 foot long concrete piles driven through sandy silt to
hard gravel.
In the station pumps are now numbered
from 1 to 6 commencing at the north end, originally pumps
2, 3, 4 and 5 were installed, each 48ins diameter with a total
capacity of 800T/min.
Following the catastrophic floods of
1947, when the Wash Bank north of Crowland breached, further
pumping capacity at Tydd was deemed necessary. Pump 1 was
installed in 1950 of similar specification to those installed
in 1938 i.e. 48ins diameter increasing the capacity to 1,000
T/min.
The extremely wet year of 1968, culminating
in torrential rain of 4.5 inches in 12 hours indicated the
need for further increase in capacity. This has been achieved
by electrifying pumps 4 and 5 and increasing r.p.m. also installing
a new electric pump (No.6) in the space provided in the original
station, giving a capacity today of 1,276 T/min or 20.17 cumecs.
The contract for the pumping plant was awarded to NEI-APE
Ltd. - W.H. Allen in the sum of £364,659.
The final updating of the Pumping Station
and Main Channel was completed in 1986 at a cost of £1,020,107.
The
pumping station serves an area of 15,380 hectares protecting
agricultural land, industrial units and residential properties.
The updated capacity will cater for a run-off of 1.37 cumecs/1,000
hect. with a static head of 5.75 metres.
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