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South River CR 402 Bridge



Photo taken by James Baughn

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BH Photo #106139


Pony truss bridge over South River on CR 402, east of Palmyra
Marion County, Missouri
Open to one-lane traffic
Built ca. 1930, replacing an earlier bridge
Riveted, 5-panel Pratt pony truss
Length of largest span: 80.0 ft.
Total length: 81.0 ft.
Deck width: 15.7 ft.
Approximate latitude, longitude
+39.79292, -91.48721   (decimal degrees)
39°47'35" N, 91°29'14" W   (degrees°minutes'seconds")
Approximate UTM coordinates
15/629523/4405867 (zone/easting/northing)
Quadrangle map:
Quincy SW
Land survey
T. 58 N., R. 5 W., Sec. 29
Average daily traffic (as of 2017)
Inventory numbers
MO 064-187001.5 (Missouri off-system bridge number)
MONBI 18495 (Missouri bridge number on the National Bridge Inventory)
BH 22014 (Bridgehunter.com ID)
Inspection report (as of February 2017)
Overall condition: Poor
Superstructure condition rating: Poor (4 out of 9)
Substructure condition rating: Fair (5 out of 9)
Deck condition rating: Fair (5 out of 9)
Sufficiency rating: 23.1 (out of 100)
View more at BridgeReports.com


5-panel truss (603)
Built during 1930s (12,245)
Functionally obsolete (5,762)
Marion County, Missouri (64)
Missouri (6,570)
One-lane traffic (7,992)
Open (41,199)
Owned by county (21,710)
Pony truss (17,221)
Pratt pony truss (4,019)
Pratt truss (10,533)
Riveted (2,644)
Span length 75-100 feet (6,731)
Total length 75-100 feet (6,934)
Truss (36,693)

Update Log 

  • April 3, 2006: Posted new photos


Bridge near Hannibal, MO
Posted October 2, 2012, by Barb Valley (barb [at] mahvelousmailboxes [dot] com)

About 5 years ago I was leaving Hannibal, MO on my way North back to Wisconsin. I do not remember what road I was on- I just remember turning onto a rather large bridge, going up, over a large river (I assume the Mississippi) and suddenly I was on the most terrifying, dilapidated busy bridge. I remember seeing old wood handrails, 1 narrow lane each way, no shoulder- nothing to save you should you not be paying attention. Well- I am going to be in Missouri again, and would love to check out that bridge. Does anyone know what one I could be talking about? What road is it on? Any help is appreciated. Thanks in advance. Barb