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Twin Culverts

Pike County, Illinois
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Photos 

North portal of the south culvert

Photo taken by Fmiser in June 2012

License: Creative Commons Attribution-Share-Alike (CC BY-SA)

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Map 

Description 

The railroad built two embankments through this valley that has a small, intermittent stream that joins Hill Creek. The earlier northern one was abandond when the southern one was built. The stream and Old Pearl Road, or Township Road 461, share the stone arch culverts, or tunnels. At the culverts the two embankments are approximately 230 ft (70 m) apart. In between the embankments is a cave that is part of the Twin Culverts Cave Nature Preserve.

View Uglybridges.com report

Facts 

Overview
Pair of arch bridges, or tunnels under ICRR.
Location
Pike County, Illinois
Status
Open to traffic
Design
A pair of stone archs that allow the creek and the road to pass through the railroad embankment. Each one is about 10ft by 10ft by 50ft.
Dimensions
Length of largest span: 30.8 ft.
Total length: 32.1 ft.
Also called
TR 461 Bridge
Approximate latitude, longitude
+39.44617, -90.66362   (decimal degrees)
39°26'46" N, 90°39'49" W   (degrees°minutes'seconds")
Approximate UTM coordinates
15/701045/4368895 (zone/easting/northing)
USGS topographic map
Pearl West
Inventory numbers
IL 075-9909 (Illinois bridge number)
BH 15608 (Bridgehunter.com ID)
Average daily traffic (as of 2006)
25

Categories 

Arch (9,419)
Canadian National Railway (169)
Deck arch (8,700)
Gulf, Mobile & Ohio Railway (12)
Illinois (2,499)
Illinois Central Railroad (211)
 Open (28,310)
Pike County, Illinois (39)
Railroad (4,070)
Span length 25-50 feet (10,053)
Stone arch (1,927)
Total length 25-50 feet (7,628)

Update Log 

  • July 16, 2012: Updated by Daniel Hopkins: Added category "Railroad"
  • July 13, 2012: Updated by Fmiser: Captioned photos
  • July 10, 2012: New photos from Fmiser
  • July 8, 2012: Updated by Fmiser: Updated design and description

Sources 

  • Fmiser - fmiser [at] gmail [dot] com
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Comments 

Twin Culverts
Posted July 8, 2012, by Fmiser (fmiser [at] gmail [dot] com)

I'm not sure what to do with the dimensions for this one.

These are effectively tunnels, making the "bridge" actually for the railroad. So the span would be 10 ft. But from the perspective of the road, they are 50 ft long.

So what values should I put in the "deck width" and "span" fields?

Also, there are two structures on two different railroad embankments about 230ft apart. Should they be listed separately? Should the location be an average between the two?