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MO-79 Noix Creek Bridge

MO-79 Noix Creek Bridge

Primary Photographer(s): Nathan Holth

Bridge Documented: March 20, 2016

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Key Facts

Facility Carried / Feature Intersected
MO-79 (3rd Street) Over Noix Creek
Louisiana: Pike County, Missouri: United States
Structure Type
Metal 10 Panel Rivet-Connected Polygonal Warren Pony Truss, Fixed and Approach Spans: Metal Stringer (Multi-Beam), Fixed
Construction Date and Builder / Engineer
1935 By Builder/Contractor: Otto W. Knutson of Kansas City, Missouri and Engineer/Design: Missouri State Highway Commission

Technical Facts

Rehabilitation Date
Not Available or Not Applicable
Main Span Length
101 Feet (30.8 Meters)
Structure Length
217 Feet (66.1 Meters)
Roadway Width
24 Feet (7.32 Meters)
1 Main Span(s) and 3 Approach Span(s)
NBI Number

Historic Significance Rating (HSR)
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Bridge Documentation

This bridge no longer exists!

Bridge Status: This historic bridge was demolished by MoDOT on July 2017!

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

View The Original Plans For Historic Bridge

View Missouri Historic Bridge Inventory Sheet For This Historic Bridge

This bridge was noted for its very unusual design details, which resulted from a combination of a 47 degree skew and a superelevation for a curve. A steel beam actually cantilevers out from the concrete piers to hold portions of the bridge that are beyond the pier due to the heavy skew.

When this bridge was proposed for replacement, HistoricBridges.org was a Consulting Party for the Section 106 Review. Having field visited the bridge, it was clear the deck was in horrible condition, but the truss was in surprisingly excellent condition. Since historically, bridges were designed with the intent that the deck would be replaced one or more times in the service life of the bridge, the proper course of action seemed clear: replace the desk and rehab the trusses. Located on a speed-restricted road in an small town setting, there was no need for wide shoulders of a modern bridge here. MoDOT, having a bad (non-existent actually) track record for preservation, this bridge seemed like one bridge that might finally be preserved, given its condition, and also its rare design making it more noteworthy. If MoDOT would not preserve this bridge, then pretty much every other truss bridge in Missouri would be without hope of preservation, because most other truss bridges have more problems than this bridge did. So what happened? MoDOT refused to preserve the bridge, and it was demolished and replaced. It made arguments in favor of demolition and replacement using a few sheets of paper containing statements that were almost completely unsupported by engineering evidence that would be expected in Section 106 Reviews in any other state. Requests by the Consulting Parties for engineering data defending their decision went unanswered. The concerns of the Consulting Party were ignored and/or not addressed. What more is there to say? Missouri has one of the worst preservation track records in the country and has no interest whatsoever in changing that. Soon there will not be any historic truss bridges left on MoDOT roads to preserve. Given that even this bridge would not be preserved by MoDOT, there is little reason to have much hope of other surviving bridges in Missouri.

HistoricBridges.org is providing copies of two letters written as a Section 106 Consulting Party, one written at the start of consultation, and the other sent at the end of consultation, both addressed to MoDOT: Click here to view the letters. These letters describe the conditions at the bridge as noted by HistoricBridges.org, and the lack of good consultation on the part of MoDOT. Unless there is drastic change in how historic bridges and Section 106 is handled in Missouri, all historic bridges owned by MoDOT can almost certainly be expected to be demolished and replaced.


Photo Galleries and Videos: MO-79 Noix Creek Bridge

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Maps and Links: MO-79 Noix Creek Bridge

This historic bridge has been demolished. This map is shown for reference purposes only.

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