total width: 30 m /
total lenght 315 m (built with 14 pieces each of 22,5 m lenght)
two tunnel tubes for road traffic (seperated by
a tube which can be used as an escape route) and a tube
for high-grade public transportation from and to Leidschenveen.
The lowest part of the road: 9,5 m Normal Amsterdam
Level. The water level of the river the Vliet is 0,4
m Normal Amsterdam Level
depth of passage: 3,2 m
approx. 1400 vibrocombi piles were drilled in
an excavation site
total amount of concrete used: 40.000 m3 (of which
14.000 m3 underwater concrete).
For your information: The Fossa
Corbulonis was and is a canal between the Rhine and
mouth of the Meuse, between Leiden and Voorburg, the modern
Vliet river. The Roman general Cnaeus Domitius Corbulo
has built this canal in 47 (to prevent ships from crossing
the dangerous sea).
here for more modern aqueducts
in the Netherlands.
Romans also settled in Nijmegen and Heerlen. Heerlen was
then called Coriovallum.
here for more information about the Dutch Roman time....