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CN Trempealeau River Bridge #9

Parker Pony Truss Bridge over Trempealeau River
Dodge, Trempealeau County, Wisconsin
To
Near Fountain City, Buffalo County, Wisconsin

Click the Photo Above to See All Photos of This Bridge!
Name CN Trempealeau River Bridge #9
Built By Green Bay Western Railroad
Contractor Wisconsin Bridge & Iron Company of Milwaukee
Currently Owned By Canadian National Railway
Length 210 Feet Total, 105 Foot Spans
Width 1 Track
Height Above Ground 10 Feet (Estimated)
Superstructure Type Parker Pony Truss
Substructure Type Stone Masonry and Steel Caisson
Date Built 1898, Strengthened Ca. 1940
Traffic Count 1 Trains/Day (Estimated)
Current Status In Use
CN Bridge Number 203.7
Significance Regional Significance
Documentation Date August 2015
In 1871, the Green Bay & Lake Pepin Railroad began construction of a line across the State of Wisconsin from the lower West Central Portion at East Winona to the mid-northeast area at Green Bay.

This line would transverse Wisconsin as a diangonal, with the first section opening in 1871 between Green Bay and New London, in Outagamie County.

The bulk of the line opened in 1873, from New London to Marshland, at the connection with a Chicago & Northwestern Mainline.

The final piece opened in 1883 between Marshland and Winona, a short 2 mile section. This forced the railroad to end at the Chicago, Burlington and Quincy mainline.

A joint project was undertaken by the GB&LP and the CB&Q in 1891 to construct a bridge across the Mississippi River into Winona to bypass the Chicago & Northwestern Structure.

By 1896, the railroad was absorbed by a new railroad called the Green Bay & Western, who also purchased a few other smaller railroads. This line made up the bulk of the system by far.

The Green Bay Western operated this line until 1993, when it was merged into the Wisconsin Central Ltd, who began chopping up the system something awful.
The WCL was purchased by the Canadian National Railway in 2001, who operates sections of this line.

While the bridge bridge across the Mississippi River was closed in 1984, and burned in 1989, and demolished in 1990, the rest of the line was whole until the WCL takeover.

The bulk of the line from East Winona (now a BNSF Railway Junction) to Plover (where it had a connection to Stevens Point) is still intact and used regularly.

From Plover to Manawa is the Tomorrow River State Trail, with Scandinavia to Plover being abandoned 1994, and Manawa to Scandinavia being abandoned 2000.

From Manawa to New London is still active.

From New London to Seymour is the Newton Blackmour State Trail, with the remaining chunk expected to be completed in 2016 to Green Bay.
This portion was abandoned in 2001.
Today, not much remains of the northern end of the GBW, however the southern end is operated as the Canadian National Whitehall Subdivision.
06/16/22


This unique pony truss bridge crosses the Trempealeau River on a superelevated curve near Dodge.
The bridge is located just off of County Road P. It features two Riveted Pony Truss Spans, each with a heavy skew.
Built in 1898, these 10 Panel Parker Pony Truss spans sit on steel caisson piers. In addition, additional piers have been added mid span on each span to strengthen the load capacity.
The structure also features stone abutments, which appear to be original to this bridge.
One unique feature of the bridge is the superelevated curve it sits on. This means that the bridge is actually built skewed and very slightly tilted to provide the maxiumum efficiancy around the curve.
This may also be a reason the additional piers were added. Outriggers on each span also strengthen the bridge.

The author has ranked this bridge as having regional significance, because of the very unique design and set of circumstances under which this bridge was built.
The photo above is an overview.

Trempealeau River Railroad Bridges
Upstream CN Trempeleau River Bridge #8
Downstream CN Trempeleau River Bridge #10

Citations

Source Type

Source

Build Date ICC Valuation Notes at the National Archives
Railroad Line History Source ICC Valuation Information, Compiled by Richard S. Steele



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