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Iola Trail Bridge

Double Barreled Pratt Through Truss Bridge over Elm Creek
Iola, Allen County, Kansas

Click the Photo Above to See All Photos of This Bridge!
Name Iola Trail Bridge
Built By Atchison, Topeka & Santa Fe Railway
Contractor Unknown
Currently Owned By Allen County
Length 224 Feet Total, 164 Foot Main Span
Width 1 Track
Height Above Ground 10 Feet (Estimated)
Superstructure Type Pratt Through Truss and Deck Girder
Substructure Type Concrete and Stone Masonry
Date Built 1890, Approach Added 1900
Date Strengthened 1919 Using Pieces Built 1898
Salvaged Pieces Original Location Bridge #533A: Purgatoire River near Las Animas, Colorado
Traffic Count 0 Trains/Day (Bridge is a Trail)
Current Status Rails to Trails
ATSF Bridge Number 110.6
Significance High Significance
Documentation Date March 2017


Of the many unique bridges in Kansas, this is one of the most notable.
The bridge is an extremely unique design. The main truss is an 8-panel pin connected Pratt Through Truss.
This span was built in 1890, and is identical to a bridge in nearby Melvern.
It is believed that this is likely a standard span design for the time period.
The approach spans were built in 1900, and added to the north end of the truss. The truss was double-trussed in 1919. This process added an additional line of trusses to the structure. This additional line appears to be identical to the inside trusses.
These trusses were salvaged from Bridge #533A over the Purgatoire River near Las Animas, Colorado when that structure was replaced with a through girder.
The bridge also is set onto stone substructures. The south abutment has since been encased in concrete. This was likely done at one of two times. If the span was relocated to the current location in Ca. 1909, it could have been encased then.
An alternative and more likely theory states that the abutment was encased during the 1919 strengthening.

Because of the extremely unique history and the double trussed design of the bridge, the author has ranked this bridge as being highly significant. The bridge remains in good condition, serving the Southwind Rail Trail.
The photo above is looking north across the bridge. The bridge is easily accessible from State Street.

Citations

Source Type

Source

Build Date (Main Span) Atchison, Topeka & Santa Fe Railway 1984 Bridge Book; courtesy of the Temple, TX Railroad Museum
Build Date (Approach Span) Atchison, Topeka & Santa Fe Railway 1984 Bridge Book; courtesy of the Temple, TX Railroad Museum
Relocated Pieces Information Atchison, Topeka & Santa Fe Railway 1916 Bridge Ratings; courtesy of the Temple, TX Railroad Museum
Railroad Line History Source ICC Valuation Information, Compiled by Richard S. Steele