Blair Rail Bridge

Parallel to US-30 sits one of the most massive truss bridges in the States of Iowa and Nebraska: the Blair Rail Bridge.
The bridge was built in 1924, replacing an older Whipple Truss Bridge. These older spans were rebuilt and moved to Wyoming, where one of the three continues to survive near Midval, Wyoming carrying a trail across the Wind River.
That bridge was built in 1883 by George S. Morison, who was well known for building massive Whipple Truss spans over the Mississippi and Missouri Rivers. Keystone Bridge Company did the fabrication.

Historic photo of the previous bridge, courtesy of Library of Congress

The old bridge featured large spans, with a latticed portal bracing. These spans included pinned connections and were set on stone substructures.
By 1923, the old spans had outlived their usefulness and were scheduled to be replaced. These spans were replaced with a trio of massive Parker Through Trusses and Deck Girders.
The new trusses are 10 panel, riveted Parker Through Trusses with very heavy pieces.
In addition, the approaches were rebuilt at this time. The west side features 3 deck girder spans, set onto steel towers.
The east end features a single deck girder, of fishbelly design, and a newer I-Beam span.

Photo showing the reconstruction of the bridge in 1924. From Railway Age Gazette: Volume 77 Issue 21

The bridge also reused the 1883 stone piers, in addition to new concrete abutments, a steel tower and a H-Pile pier on the east end.
The bridge has a strong significance to the area. Because of the railroad originally crossing the Missouri River at this point, Blair came to be. It is the largest town in Washington County.
In addition, the bridge serves a steady base of westbound traffic across the Missouri River, bypassing Omaha. Because of the rising level of traffic coming from the west, plans to replace this bridge; or to build a second span have been circulating.
However, none of these have been confirmed or engineered yet.

The best places to view the bridge are from the Nebraska side, at a boat launch. For the more daring, walking along the shoulder of US-30 can be quite intimidating but also provides good views.
It should be noted that trespassing on this bridge is absolutely not tolerated for obvious safety reasons, and a camera system has been installed to enforce this.

The author ranks the bridge as being regionally significant, due to the bridges history and background in Blair.
The photo above is an overview, from the west bank.