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Carroll County Road 323 Bridge

Photos 

Overview

Photo taken by James Baughn in September 2009

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BH Photo #147187

Map 

Street View 

Description 

Likely a former railroad span

Facts 

Overview
Pony truss bridge over the BNSF Railway on CR 323
Location
Carroll County, Missouri
Status
Open to traffic
History
Built 1911
Design
Pin-connected, 5-panel Pratt pony truss
Dimensions
Length of largest span: 80.0 ft.
Total length: 208.9 ft.
Deck width: 14.8 ft.
Approximate latitude, longitude
+39.45856, -93.34697   (decimal degrees)
39°27'31" N, 93°20'49" W   (degrees°minutes'seconds")
Approximate UTM coordinates
15/470150/4367722 (zone/easting/northing)
Quadrangle map:
Bosworth
Land survey
T. 54 N., R. 22 W., Sec. 27
Inventory numbers
MO 017-274000.1 (Missouri off-system bridge number)
MONBI 20766 (Missouri bridge number on the National Bridge Inventory)
BH 21134 (Bridgehunter.com ID)
Inspection (as of 01/2016)
Deck condition rating: Satisfactory (6 out of 9)
Superstructure condition rating: Fair (5 out of 9)
Substructure condition rating: Poor (4 out of 9)
Appraisal: Structurally deficient
Sufficiency rating: 24.4 (out of 100)
Average daily traffic (as of 2016)
35

Update Log 

  • October 16, 2016: New photos from John Marvig
  • October 5, 2009: New photos from James Baughn

Sources 

Comments 

Carroll County Road 323 Bridge
Posted October 17, 2016, by Nathan Holth (webmaster [at] historicbridges [dot] org)

Substructure does not appear original and construction date is suspect for alteration/relocation. That said, the riveted angles you note appear to be beam stiffeners, not hangers. Unless I missed something in your photo. My feelings is this is a railroad-designed highway over railroad bridge that may have been relocated/improved in 1911. But that's just based off cursory review of your photos as shown here.

Carroll County Road 323 Bridge
Posted October 16, 2016, by John Marvig (marvigj27 [at] gmail [dot] com)

Bridge looks to be a relocated lightweight railroad pony truss span, reused for road use. The evidence is in picture #24, where there are unused pieces of angle iron, which may have connected the former railroad stringers. The Santa Fe archives reports that this bridge received a completely new deck in 1929, so it is possible that the other railroad related components would have been removed then as well?