Rating:
6 votes

170th Street Bridge

Story County, Iowa

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)
- Public Works Administration
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
Average daily traffic (as of 2015)
120
Inventory numbers
IA 315280 (Iowa bridge number)
BH 14442 (Bridgehunter.com ID)
Inspection report (as of November 2016)
Overall condition: Fair
Superstructure condition rating: Fair (5 out of 9)
Substructure condition rating: Satisfactory (6 out of 9)
Deck condition rating: Fair (5 out of 9)
Sufficiency rating: 52 (out of 100)
View more at BridgeReports.com

Categories 

Built 1939 (736)
Built during 1930s (11,280)
ISHC Standard Series T (186)
Illinois Steel Co. (29)
Inland Steel Co. (16)
Iowa (6,219)
M-frame portal (81)
Open (38,277)
Owned by county (20,093)
Painted Surf Green (11)
 Painted green (151)
Parker through truss (1,244)
Parker truss (1,614)
Public Works Administration (34)
South Skunk River (50)
Span length 125-175 feet (3,993)
Story County, Iowa (155)
Through truss (14,106)
Total length 125-175 feet (5,675)
Truss (31,308)

Update Log 

  • January 28, 2019: Updated by Luke: Bridge was a Public Works Administration project
  • 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 

Comments 

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