1 vote

Millville Road Bridge


Overview Looking Northwest

Photo taken by J.R. Manning June 2012


BH Photo #233197


This bridge might just be, perhaps, the only surviving example of a bridge built by the Dubuque Boat & Boiler Works.


Pony truss bridge over Peck Creek on Millville Road
Clayton County, Iowa
Destroyed by flooding
Built 1916; Knocked off foundations July 2017; Replaced October-November 2017
- Dubuque Boat & Boiler Works of Dubuque, Iowa
- Iowa State Highway Commission of Ames, Iowa (Design)
Warren pony truss with all verticals
Span length: 60.0 ft.
Total length: 60.0 ft.
Deck width: 14.8 ft.
Approximate latitude, longitude
+42.69540, -91.16707   (decimal degrees)
42°41'43" N, 91°10'01" W   (degrees°minutes'seconds")
Approximate UTM coordinates
15/650137/4728618 (zone/easting/northing)
Quadrangle map:
Land survey
T. 91 N., R. 3 W., Sec. 14
Average daily traffic (as of 2013)
Inventory numbers
IA 118270 (Iowa bridge number)
BH 13195 (Bridgehunter.com ID)
Inspection report (as of December 2016)
Overall condition: Fair
Superstructure condition rating: Satisfactory (6 out of 9)
Substructure condition rating: Satisfactory (6 out of 9)
Deck condition rating: Fair (5 out of 9)
Sufficiency rating: 56.8 (out of 100)
View more at BridgeReports.com

Update Log 

  • December 5, 2017: Updated by Luke: Knocked off supports by flooding July 2017; Replaced October-November 2017
  • June 10, 2012: New photos from J.R. Manning


Millville Road Bridge/Dubuque Boat & Boiler Works
Posted December 7, 2017, by Luke

After finding out about the loss of this bridge, I sought out any info on any other bridges that may have built by this shipbuilder-turned-bridge-builder, and turned up the following:

"Decorah - The contract for constructing 10 I-beam bridges with reinforced concrete abutments was awarded to the Dubuque Boat & Boiler Works, Dubuque, at $14,269"


Sadly the NBI shows no steel stringers built in 1916, so it seems these disappeared as well.

Millville Road Bridge
Posted December 5, 2017, by Luke
Millville Road Bridge
Posted December 5, 2017, by Robert Elder (robertelder1 [at] gmail [dot] com)

This bridge is/was a very rare example of a Pratt-Warren Hybrid. There were a few of them in Kansas, but to the best of my knowledge all Kansas examples have been demolished except for this one which was saved by a landowner:


These bridges are an unusual example of innovation during the latter part of the truss era. By 1915, trusses were largely standardized, but these hybrids attest to late attempts at modification.

Millville Road Bridge
Posted December 5, 2017, by Luke