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J Avenue Bridge

Boone County, Iowa
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Photos 

Oblique View

From the northeast side.

Photo taken by J.R. Manning

Map 

View Uglybridges.com report

Facts 

Overview
Pony truss bridge over UPRR on J Avenue
Location
Boone County, Iowa
Status
Open to traffic
History
Built 1900
Design
Riveted double-intersection Warren pony truss
Dimensions
Length of largest span: 69.9 ft.
Total length: 140.1 ft.
Deck width: 18.4 ft.
Also called
Hump Bridge
Approximate latitude, longitude
+42.05213, -93.98946   (decimal degrees)
42°03'08" N, 93°59'22" W   (degrees°minutes'seconds")
Approximate UTM coordinates
15/418121/4656038 (zone/easting/northing)
Land survey
T. 84 N., R. 27 W., Sec. 27
USGS topographic map
Boone West
Inventory numbers
IA 77860 (Iowa bridge number)
BH 12908 (Bridgehunter.com ID)
Inspection (as of 05/2010)
Deck condition rating: Poor (4 out of 9)
Superstructure condition rating: Serious (3 out of 9)
Substructure condition rating: Poor (4 out of 9)
Appraisal: Structurally deficient
Sufficiency rating: 14.6 (out of 100)
Average daily traffic (as of 2007)
120

Categories 

Boone County, Iowa (56)
Built 1900 (699)
Built during 1900s (4,246)
Chicago & North Western Railway (470)
Double-intersection Warren pony truss (132)
Double-intersection Warren truss (220)
Iowa (3,501)
Open (28,308)
 Owned by county (16,488)
Pony truss (13,216)
Skewed (4,080)
Span length 50-75 feet (6,995)
Structurally deficient (16,678)
Total length 125-175 feet (4,136)
Truss (23,567)
Wooden deck (5,398)

Update Log 

  • March 28, 2013: New photos from John Marvig
  • September 2, 2011: Updated by Luke Harden: Added alternate name
  • February 19, 2010: Updated by J.R. Manning: Updated Location

Sources 

  • J.R. Manning - thekitchenguy [at] sbcglobal [dot] net
  • Luke Harden - lukemh9 [at] gmail [dot] com
  • John Marvig - johnmarvig [at] chaska [dot] net
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Comments 

J Avenue Bridge
Posted May 6, 2013, by C J Johnson (108stitchesiowa [at] netzoola [dot] com)

Union Pacific trains roar many times daily under this bridge at well over 50+ mph before crossing the new concrete Kate Shelley High Bridge completed East of this bridge. I believe that this bridge is sometimes referred to as the "Humpback Bridge".

Photo taken Winter 2013.

Uploaded file: JPEG image data, JFIF standard 1.01, 1597458 bytes

UPRR Bridge
Posted July 16, 2007, by Lugnuts (thekitchenguy [at] sbcglobal [dot] net)

This bridge is located off 200th Street on L Road, a dead-end road, and provides the only access over the double-tracked Union Pacific mainline that some proptery owners have. The fence posts along the road leading away from the bridge appear to have been cut from a shoe tree.

This is a virtual twin to the pony truss bridge listed as #77840. The twin tracks shown continue west, cross the Des Moines River on the Kate Shelly Bridge (see Truss Bridge #77850 for more about the Kate Shelly Bridge) then curves to the southwest and goes under #77840.

The bridge is all wood timbered and wood decked. It has little trafic but appears to be well maintained.

Webmaster's note: The photos that were here have been incorporated into the main site.