Located about a mile south of the small town of Hoag, this truss bridge crosses the Big Blue River at a dead end on Juniper Road.
Several other truss bridges around the CB&Q system share a similar design to this structure, and were built by King Bridge Company during this time frame.
Built in 1902, this particular bridge consists of a large, 6-panel pin connected Pratt Through Truss. This truss follows a standardized CB&Q design. In addition, it is approached by both wooden trestle, as well as newer modular concrete spans on the west end. The bridge rests on concrete, stone, timber and steel substructures. It appears the concrete spans were added in late 2009.
Unlike some of the other similar trusses along the CB&Q, this truss has a unique design feature. The outermost lower connections are riveted, while the remaining connections are pinned. The members are also riveted at the joints for extra strength.
It appears that at some point, the bridge was raised, likely to alleviate flooding concerns. Evidence can be seen on the east abutment, as well as the pier. It appears the original stone work was capped with concrete on the pier, and a whole new concrete abutment was built on top of an older stone abutment.
The vertical members in the middle are laced style beams, while the endposts are solid on three sides. The outer vertical members consist of heavier laced beams. The portal and sway bracings are typical of a CB&Q bridge.
Unfortunately, many similar trusses have been lost in this area since the Burlington Northern merger. This structure represents one of only a few remaining such bridges.
Overall, the bridge appears to be in good condition. The approaches being replaced indicates BNSF intends to keep this line in service. It also appears that no major alterations have been made to the truss span.
The author has ranked this bridge as being regionally significant, due to the lack of remaining pinned trusses in the area.
The photo above is an overview.
Upstream | UP Big Blue River Bridge (DeWitt) |
Downstream | BNSF Big Blue River Bridge (Beatrice) |