Rating:
6 votes

170th Street Bridge

Photos 

Photo taken by Carl Wycoff

License: Creative Commons Attribution (CC BY)

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View this photo on Flickr

BH Photo #279999

Map 

Facts 

Overview
Through truss bridge over South Skunk River on 170th Street
Location
Story County, Iowa
Status
Open to traffic
History
Built 1939
Builders
- Illinois Steel Co. of Chicago, Illinois (Iron/Steel Manufacturer)
- Inland Steel Co. of East Chicago, Indiana (Iron/Steel Manufacturer)
Design
Eight panel Parker through truss with riveted connections.
Dimensions
Length of largest span: 149.9 ft.
Total length: 151.9 ft.
Deck width: 20.0 ft.
Vertical clearance above deck: 11.8 ft.
Approximate latitude, longitude
+42.10603, -93.57061   (decimal degrees)
42°06'22" N, 93°34'14" W   (degrees°minutes'seconds")
Approximate UTM coordinates
15/452821/4661705 (zone/easting/northing)
Quadrangle map:
Ames East
Land survey
T. 84 N., R. 23 W., Sec. 7
Inventory numbers
IA 315280 (Iowa bridge number)
BH 14442 (Bridgehunter.com ID)
Inspection (as of 01/2015)
Deck condition rating: Satisfactory (6 out of 9)
Superstructure condition rating: Fair (5 out of 9)
Substructure condition rating: Satisfactory (6 out of 9)
Appraisal: Functionally obsolete
Sufficiency rating: 53.0 (out of 100)
Average daily traffic (as of 2011)
120

Update Log 

  • October 17, 2016: Updated by Dana and Kay Klein: South Skunk
  • June 2, 2015: New photos from Kevin Skow
  • February 2, 2015: New photos from Lee Smith
  • March 18, 2014: New photo from Luke Harden
  • February 22, 2014: New photo from Jack Schmidt
  • October 14, 2012: Updated by Luke Harden: Added steel fabricators to builders section
  • July 20, 2012: Updated by Luke Harden: Added category "M-frame portal"
  • September 12, 2011: New photo from Luke Harden
  • September 11, 2011: New photo from Luke Harden
  • September 4, 2011: New photo from Luke Harden
  • August 31, 2011: New photos from Jason Smith
  • July 6, 2011: New photos from Luke Harden
  • August 13, 2010: Updated by Nathan Holth: Updated bridge type.

Sources