ft -"A
Gebr.de Klerk
WERKENDAM
In the years 1949 to 1953
our company manufactured more
than 500,000 square
metres of mattresses
HOLLAND
l i t i T^; a.
The closing of the Braakman. The last caisson being placed in position Photo: K.L.M.
In the years 1949 and 1950 we made the mattress foundations for the
enclosing dams of the Brielse Maas and the Botlek and in 1952 those
for the closine; of the Braakman.
The manufacture of a mattress
We moreover had a consider
able share in the manufacture
of the mattress foundations
for the Zuider Zee project.
After the disaster in February
1953 our company made sim
ilar foundations for the large
tidal gaps near Kruiningen
(three), Sir Jansland (two) and fifty percent of the mattress found
ations for the gaps at Ouwerkerk.
Tidal gap at Kruiningerpolder. The
ballasting of a mattress
The last stage in the level ling operations
for the threshold of one of the tidal gaps
in Zeeland
