The Pontcysyllte aqueduct "carries"
the Llangollen canal over the valley of the Dee river
(North of Wales).
* the aqueduct is 307 m long
* the construction
consists of an iron aqueduct fitted onto 19 brick arches
the canal is 36,5 m above the river
there is no railing attached at the side of the canal!
Part of what they used to call the Ellesmere canal was
one of the first big construction works of the famous
engineer Thomas Telford (counseled by the more experienced
canal engineer William Jessop).
The aqueduct was
opened 26 november 1805 (they constructed and built
it in about 10 years time).
The Dundas aqueduct
is a monumental construction, built out of several kinds
over the river Avon.
The aqueduct was designed by
John Rennie and built/finished in 1798.
* it is approx.
46 m long
the central, almost round arch bridges 19,5 m
two oval arches on the side bridge 6 m.
on the photograph to the left.