Rating:
3 votes

DM&E - Dogwood Avenue Overpass

Photos 

Photo taken by Steven Willard.

View this photo on Flickr

BH Photo #267030

Map 

Facts 

Overview
Concrete stringer bridge over Dagwood Avenue on Dakota, Minnesota & Eastern Railroad
Location
Washington County, Iowa
Status
Open to traffic
History
Built 1909
Railroads
- Canadian Pacific Railway (CP)
- Chicago, Milwaukee, St. Paul & Pacific Railroad (MILW; CMStP&P; CMStP)
- Dakota, Minnesota, & Eastern Railroad (DME)
- I&M Rail Link (IMRL)
- Iowa, Chicago & Eastern Railroad (ICE)
- Soo Line Railroad (SOO)
Design
Concrete deck girder
Dimensions
Length of largest span: 24.9 ft.
Total length: 112.0 ft.
Approximate latitude, longitude
+41.23658, -91.88917   (decimal degrees)
41°14'12" N, 91°53'21" W   (degrees°minutes'seconds")
Approximate UTM coordinates
15/593088/4565615 (zone/easting/northing)
Quadrangle map:
Richland
Land survey
T. 74 N., R. 9 W., Sec. 4
Inventory numbers
IA 336030 (Iowa bridge number)
BH 58103 (Bridgehunter.com ID)

Update Log 

  • April 20, 2018: New photos from John Marvig
  • September 26, 2013: Photo imported by Luke Harden
  • September 23, 2013: Updated by Dylan VanAntwerp: Added category "Soo Line Railroad"
  • September 22, 2013: Added by Luke Harden

Sources 

Comments 

DM&E - Dogwood Avenue Overpass
Posted May 4, 2018, by Clark Vance (cvance [at] dogmail [dot] com)

The round rebar makes me think it's after 1915. I don't really know how early round rebar came into use.

DM&E - Dogwood Avenue Overpass
Posted May 4, 2018, by John Marvig (marvigj27 [at] gmail [dot] com)

I put in a request for the bridge. The only thing confirmed was the concrete design, while the 1909 date was not confirmed. In my opinion, the age of the bridge seems to match up. Thoughts?

DM&E - Dogwood Avenue Overpass
Posted April 25, 2018, by John Marvig (marvigj27 [at] gmail [dot] com)

Clark,

I believe this date came from the NBI. I also know there are other bridges along this line built at this time. I can put in an adchices request though, and perhaps I could find some blueprints.

DM&E - Dogwood Avenue Overpass
Posted April 25, 2018, by Clark Vance (cvance [at] dogmail [dot] com)

Looking at the rebar in picture 11 it looks more modern than the 1909 date. I would expect a twisted square section. How solid is the date on this one?

Definitely an unusual structure if it's anywhere close to a century old.

DM&E - Dogwood Avenue Overpass
Posted April 24, 2018, by John Marvig (marvigj27 [at] gmail [dot] com)

Thanks for the input. I imagine this was probably an expirmental design, as I haven’t seen anything like it anywhere else along the Milwaukee Road system. I wonder why a design like this would’ve been chosen for this location over a standard bridge..

DM&E - Dogwood Avenue Overpass
Posted April 23, 2018, by Nathan Holth (webmaster [at] historicbridges [dot] org)

That being the case (exposed rebar) and the visible floorbeams this would be an early/rare example of a reinforced concrete deck girder.

DM&E - Dogwood Avenue Overpass
Posted April 23, 2018, by Matt Lohry

It looks like there actually is some exposed rebar at the very top of Photo #11, indicating a concrete bridge.

DM&E - Dogwood Avenue Overpass
Posted April 23, 2018, by Clark Vance (cvance [at] dogmail [dot] com)

Just speculation, I think steel plate girder spans would be longer. These short spans might be some early reinforced concrete girders. I'd want to look for exposed rebar as a clue to what the concrete covers.

DM&E - Dogwood Avenue Overpass
Posted April 20, 2018, by John Marvig (marvigj27 [at] gmail [dot] com)

Curious bridge here. Looking at picture 11, it appears that the bridge may be a steel deck girder, later encased in concrete. Thoughts?