2 votes

IAIS - Rock Creek Bridge


Looking NorthEast

Photo taken by Daniel Barnes in September 2017


BH Photo #401751


The east (1890) and west (1888) spans were built at other locations and moved here in 1912.


Bridge over Rock Creek on Iowa Interstate Railroad
Jasper County, Iowa
Open to traffic
Built 1888 and 1890, assembled here and center span built 1912
- Lassig Bridge & Iron Works of Chicago, Illinois
- Chicago, Rock Island & Pacific Railroad (CRIP (1866-1920); RI (1920-1975) ROCK (1975-1980))
- Iowa Interstate Railroad (IAIS)
- Iowa Railroad (IRRC)
Steel stringer
Length of largest span: 60.0 ft.
Total length: 148.0 ft.
Approximate latitude, longitude
+41.70163, -92.83789   (decimal degrees)
41°42'06" N, 92°50'16" W   (degrees°minutes'seconds")
Approximate UTM coordinates
15/513488/4616662 (zone/easting/northing)
Quadrangle map:
Oakland Acres
Land survey
T. 80 N., R. 17 W., Sec. 33
Inventory number
BH 75539 (Bridgehunter.com ID)

Update Log 

  • July 9, 2018: New photos from John Marvig
  • September 4, 2017: New photos from Daniel Barnes
  • February 9, 2017: Added by Daniel Barnes


  • Daniel Barnes
  • John Marvig - marvigj27 [at] gmail [dot] com


IAIS - Rock Creek Bridge
Posted July 28, 2018, by Daniel Barnes

I'm Glad you visited this bridge John. I hadn't gotten the chance to do more closeup shots of the other plaques last September. I was attacked by hornets just North of the bridge when taking the South-facing shots through the trees!

IAIS - Rock Creek Bridge
Posted May 2, 2018, by John Marvig (marvigj27 [at] gmail [dot] com)

I think part of it too was the breakup of the Rock island Technical Society. I suspect somewhere the documents were donated. I know another railroad that Iíve done research with has literally hundreds of banker boxes of bridge documents. Iím hoping I can find them somewhere, as itís always really cool to know the exact history of these structures. So if anyone reading this has any Rock Island Railroad bridge documents, please send them this way!

IAIS - Rock Creek Bridge
Posted May 2, 2018, by Clark Vance (cvance [at] dogmail [dot] com)

It's frustrating that something seemingly simple and relatively recent may be totally lost history. It's nice that people here and elsewhere are working to collect and save what's left to be found.

IAIS - Rock Creek Bridge
Posted May 2, 2018, by John Marvig (marvigj27 [at] gmail [dot] com)


I Believe the line dates to the early or mid 1860s. This is the same route that crosses the Mississippi River on the famed bridge at Rock Island.

I found an article in a Railroad Gazette or similar publication that stated that that at one point, the Rock Island was reusing nearly 4/5 of spans it replaced on main lines. This railroad company is exceptionally difficult to find information on as well, as it seems a lot of records were destroyed, while a lot of bridges were moved around, even into the 40s.

IAIS - Rock Creek Bridge
Posted May 2, 2018, by Clark Vance (cvance [at] dogmail [dot] com)

Does the date match with when the line was built? It could be original stone piers were replaced later.

IAIS - Rock Creek Bridge
Posted May 1, 2018, by John Marvig (marvigj27 [at] gmail [dot] com)

Judging by the concrete substructures, I would be shocked if this bridge was assembled at this location in 1888. Instead, I'm thinking that it was likely moved from another location or locations.