A huge railway bridge and timber trestle was built in 1880 to bring iron ore to the steel mills of Pueblo, Colorado.

The bridge and trestle were built using Douglas Fir timbers from the coasts of California and Washington. The virgin timbers were milled from trees that were over 1000 years old.

- Some natural faces have a red coloration, which was a natural 100 year long process caused by iron dust accumulating and rusting into the surface of the wood