First railroad bridge was built at this location in 1855 by the
Illinois Central Railroad. It was considered to be a major
engineering achievement at the time. The bridge spanned over
one half mile of wetlands, the Illinois River, and the I&M
Canal. In 1893, the bridge structure was rebuilt using deck
truss spans sitting on the 1853 piers. When the 9-foot navigation
channel was approved, it was found that the low hanging steel on
the deck truss spans was too low for tow boats. As a result, the
main channel span was replaced by a steel through truss span sitting
on a set of new piers. The rail level of the new span was higher
than the rest of the bridge, so the rest of the bridge piers were
raised. Once the track was again level, small bridge sections were
inserted to connect the older deck truss spans to the new through
truss span.
The rail line through La Salle was abandoned in the mid-1970 during
a period when railroads were having financial problems. The bridge
and rail line going south was purchased by the Buzzi Unicem company,
which owns the concrete factory on the north side of the river. Buzzi
Unicem uses the bridge and rail spur to haul in raw materials and
haul out finished product.
There are good views of this bridge from both the IL-351 Shippingsport
Bridge and the I-39 Abraham Lincoln Memorial Bridge. It is worth
seeking out this bridge since it is one of the oldest operating
rail bridges in the midwest.