Photos 

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Side view

These photos from the Historic American Engineering Record show the bridge in 1986 during construction of its replacement [HAER photos taken Oct. 1986 by James Dale Roach]
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Oblique view

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View from above

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Deck view

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Wooden approach

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Replacement bridge

This panoramic photo from Brandon Kempf shows the new bridge

Map 

Vicinity Map

Vicinity map

Map links:

Facts 

Overview
Lost through truss bridge over Gasconade River on Holtsman Road beyond the end of Route Y
Location
Pulaski County, Missouri
Status
Replaced by modern bridge
History
Built 1911 by the Canton Bridge Co.; replaced ca. 1987
Builder
- Canton Bridge Co. of Canton, Ohio
Design
Pin-connected, 12-panel Pennsylvania through truss
Dimensions
Length of largest span: 216.0 ft.
Total length: 296.0 ft.
Deck width: 13.8 ft.
Vertical clearance above deck: 12.9 ft.
Approximate latitude, longitude
+37.90885, -92.13215   (decimal degrees)
37°54'32" N, 92°07'56" W   (degrees°minutes'seconds")
USGS topographic map
Hancock
Inventory number
BH 22372 (Bridgehunter.com ID)

Categories 

12-panel truss (12)
Built 1911 (292)
Built during 1910s (3,574)
Canton Bridge Co. (43)
Gasconade River (12)
HAER documented (310)
Lost (609)
Missouri (2,371)
Pennsylvania truss (104)
Pin-connected (443)
Pulaski County, Missouri (8)
Replaced by new bridge (493)
Span length 175-250 feet (1,006)
Through truss (5,279)
Total length 250-500 feet (2,107)
Truss (15,835)

Update Log 

Sources 

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Comments 

Riddle Bridge
Posted March 16, 2008, by Thomas Long (thom50wl [at] sbcglobal [dot] net)

My grandparents farmed the Holtsman farm on either side of the bridge for many years. When driving a herd of cattle across the bridge, it would sway from side to side. For years it had only the horizontal planks for decking and when following another vehicle, one would see the heavy planks bouncing up and down. It was deemed so usafe, that children (my brother and I being two of them) on the west side of the river were bussed back to St. Robert, then east to highway 28, and back north to Dixon. Willie Alexander attempted to haul a load of cattle across it one time, resulting in the collapse of the western approach. I think it was at that time that the county decided to install parallel drive planks across the horizontal planks. For me, that old, rattley,rusted iron bridge will always be The Riddle Bridge.

Riddle Bridge
Posted June 14, 2006, by Ronny Riddle (rrdsprado [at] aol [dot] com)

The Riddle Bridge was named for the Riddle family of TN and MO who lived on a farm near the site. The Riddle Family Cemetery is located nearby. Thank you for making these pictures available.