1 vote

Deer Creek Bridge


Photo taken by Nick Schmiedeler in February 2017


BH Photo #378903



Pony truss bridge over Deer Creek, 2.0 mi. north and 2.3 mi. west of Atchison
Atchison County, Kansas
Open to traffic
Built 1925
Pratt pony truss
Length of largest span: 49.9 ft.
Total length: 51.8 ft.
Deck width: 14.8 ft.
Approximate latitude, longitude
+39.59000, -95.17333   (decimal degrees)
39°35'24" N, 95°10'24" W   (degrees°minutes'seconds")
Approximate UTM coordinates
15/313371/4384509 (zone/easting/northing)
Quadrangle map:
Atchison West
Land survey
T. 5 S., R. 20 E., Sec. 28
Average daily traffic (as of 2007)
Inventory numbers
KS 000031049903563 (Kansas local bridge number on the National Bridge Inventory)
BH 17361 (Bridgehunter.com ID)
Inspection report (as of June 2018)
Overall condition: Fair
Superstructure condition rating: Fair (5 out of 9)
Substructure condition rating: Fair (5 out of 9)
Deck condition rating: Fair (5 out of 9)
Sufficiency rating: 43.4 (out of 100)
View more at BridgeReports.com


Atchison County, Kansas (67)
Built 1925 (1,276)
Built during 1920s (9,956)
Kansas (3,195)
One-lane traffic (7,613)
Open (39,976)
Owned by county (20,848)
Pony truss (16,241)
Pratt pony truss (3,654)
Pratt truss (9,347)
Riveted (2,183)
Span length 25-50 feet (15,708)
Total length 50-75 feet (9,318)
Truss (32,958)

Update Log 

  • February 16, 2017: New photos from Nick Schmiedeler



Deer Creek Bridge
Posted February 17, 2017, by Robert Elder (robertelder1 [at] gmail [dot] com)

That was my general thoughts as well. I have typically referred to these bridges as Pratts, mostly because I have doubted that a Warren could balance its own weight in just four panels.

Deer Creek Bridge
Posted February 16, 2017, by Nathan Holth (nathan [at] historicbridges [dot] org)

In the past, my argument was you can call it whichever you want, in terms of visual layout it meets the definition of both Pratt and Warren. However, I was thinking tonight about the engineering design. If memory serves, the defining feature of a Warren truss is that diagonals alternate in stress from tension to compression, a fact most visible in pin-connected Warrens where diagonals switched between tension eyebar and built-up compression boxes. However, I believe the end diagonals at each end would be expected to be in tension. In other words both diagonals on this small truss are in tension. There are not enough panels to develop the tension/compression pattern of diagonals. A truss having all diagonals in tension is more like the definition of a Pratt. So now having considered that I feel that a bridge of this design is probably best considered a Pratt.

Deer Creek Bridge
Posted February 16, 2017, by Robert Elder (robertelder1 [at] gmail [dot] com)

Thanks as always for tracking these bridges down.

I still don't know if the Bridgehunter community ever did arrive at a consensus of whether this type of bridge follows the Warren or Pratt configuration.

Deer Creek Bridge
Posted February 16, 2017, by Nick Schmiedeler

Several bridges packed into this area just N of Atchison