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Iroquois 2100 Bridge

TR-266 Bridge

Iroquois 2100 Bridge

Primary Photographer(s): Nathan Holth

Bridge Documented: August 13, 2006

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Key Facts

Facility Carried / Feature Intersected
Iroquois 2100 Over Sugar Creek
Rural (Near Woodland): Iroquois County, Illinois: United States
Construction Date and Builder / Engineer
1911 By Builder/Contractor: Unknown

Technical Facts

Rehabilitation Date
Not Available or Not Applicable
Main Span Length
140 Feet (42.7 Meters)
Structure Length
143 Feet (43.6 Meters)
Roadway Width
15.7 Feet (4.79 Meters)
1 Main Span(s)
NBI Number

Historic Significance Rating (HSR)
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Bridge Documentation

View Archived National Bridge Inventory Report - Has Additional Details and Evaluation

Back in 2006, when HistoricBridges.org documented Iroquois County, the following statement was placed into the narrative: "Iroquois County is filled with a large number of remaining truss bridges, must most are no larger than 100 feet in length, and many are short pony trusses." As of 2013, this statement is no longer accurate. Iroquois County has demolished a large number of its truss bridges and only a small number remain. In 2006, this bridge, a pin-connected Pratt through truss with a relatively long 143 foot span. At the time, it was the longest of a number of through truss bridges in the county. Today, it appears that this is the only through truss of any size in the entire county!

The demolition of Iroquois County's bridges since the turn of the 21st Century has been so widespread and unrelenting that it is enough to reduce any bridge historian to tears. A county that had an amazingly large and complete collection of historic bridges has nearly annihilated that collection. As such, this bridge is likely at risk for demolition as well. However, HistoricBridges.org urges Iroquois County to rehabilitate this bridge instead, something that likely costs less than it would to replace the bridge. This would at least ensure that the county does not lose everything and would prevent Iroquois County from becoming a county that does not have a single through truss remaining.

 The bridge is an eight panel structure, and is does not fall into the pattern of similar design as other Iroquois County truss bridges did. The portal bracing is a large lattice design, while the sway bracing also employ an even larger and simpler lattice design. There is v-lacing on the verticals and under the top chord and end posts. The base of the deck is concrete. The abutments are also concrete.


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