2 votes

DAIR - Dawson Bridge


DAIR Big Sioux River Bridge (Hawarden)

North Approach

Photo taken by John Marvig in January 2016


BH Photo #345330

Street View 


Information comes from CMStP&P records at the South Dakota Historical Society.


Pratt through truss bridge over Big Sioux River on Dakota & Iowa Railroad
Sioux County, Iowa, and Union County, South Dakota
Open to traffic
Built 1900
- Chicago, Milwaukee, St. Paul & Pacific Railroad (MILW)
- Dakota & Iowa Railroad (DAIR; D&I)
Pratt through truss with pinned connections; trestle approaches on both ends of the main span
Length of largest span: 138.0 ft.
Total length: 585.0 ft.
Also called
MILW Bridge #T-574
Approximate latitude, longitude
+43.05035, -96.49454   (decimal degrees)
43°03'01" N, 96°29'40" W   (degrees°minutes'seconds")
Approximate UTM coordinates
14/704053/4769452 (zone/easting/northing)
Quadrangle map:
Hawarden North
Inventory number
BH 51955 (Bridgehunter.com ID)

Update Log 

  • December 16, 2021: New Street View added by Paul Plassman
  • December 15, 2021: Updated by Luke: Added name used by railroad
  • October 16, 2021: Updated by John Marvig: added information from SDSHS files
  • December 1, 2016: New photo from Dylan VanAntwerp
  • October 1, 2016: Updated by John Marvig: Added information
  • September 22, 2016: Updated by John Marvig: Added Build Date from Contractor
  • January 9, 2016: New photos from John Marvig
  • January 3, 2016: Updated by John Marvig: Added information
  • October 26, 2012: Updated by Jason Smith: Added categories "Big Sioux River", "Wooden deck"
  • July 22, 2012: Updated by Luke Harden: Added category "Burlington Northern Santa Fe Railway"
  • April 5, 2012: Updated by Luke Harden: Added category "Pin-connected"
  • April 5, 2012: Added by Jason Smith


  • Jason Smith - flensburg [dot] bridgehunter [dot] av [at] googlemail [dot] com
  • John Marvig - marvigj27 [at] gmail [dot] com
  • Dylan VanAntwerp - dylan_vanantwerp [at] live [dot] com
  • Luke
  • Paul Plassman