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Flatrock River Bridge

Decatur County, Indiana
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Photos 

Photo taken by Anthony Dillon

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Map 

View Uglybridges.com report

Facts 

Overview
Lost through truss bridge over Flatrock River on US 421 on 575N-600W
Location
Decatur County, Indiana
Status
Replaced by new bridge
History
Built ca. 1930; replaced 1999
Design
Parker through truss
Dimensions
Length of largest span: 198.2 ft.
Total length: 295.0 ft.
Deck width: 20.3 ft.
Vertical clearance above deck: 14.8 ft.
Approximate latitude, longitude
+39.42371, -85.59225   (decimal degrees)
39°25'25" N, 85°35'32" W   (degrees°minutes'seconds")
Approximate UTM coordinates
16/621171/4364743 (zone/easting/northing)
USGS topographic map
Adams
Inventory numbers
INNBI 1600003 (Indiana bridge number on the National Bridge Inventory)
BH 38937 (Bridgehunter.com ID)
Inspection (as of 01/1991)
Deck condition rating: Serious (3 out of 9)
Superstructure condition rating: Serious (3 out of 9)
Substructure condition rating: Serious (3 out of 9)
Appraisal: Structurally deficient
Sufficiency rating: 2.0 (out of 100)
Average daily traffic (as of 1990)
1,100

Categories 

Built during 1930s (8,551)
Decatur County, Indiana (69)
Indiana (3,348)
Lost (10,368)
Lost 1999 (375)
Lost during 1990s (3,217)
Parker through truss (947)
 Parker truss (1,267)
Replaced by new bridge (7,138)
Span length 175-250 feet (1,484)
Structurally deficient (16,680)
Through truss (9,210)
Total length 250-500 feet (3,371)
Truss (23,574)

Update Log 

  • March 7, 2011: Updated by Jim Grey: Corrected GPS coordinates
  • April 1, 2009: New photo from Anthony Dillon
  • January 31, 2009: Added by James Baughn

Sources 

  • Tony Dillon - spansaver [at] hotmail [dot] com
  • Jim Grey - mobilene [at] gmail [dot] com
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Comments 

Flatrock River Bridge
Posted April 4, 2009, by Tom Hoffman (tehoffm [at] hotmail [dot] com)

The comment above or below was me!

Flatrock River Bridge
Posted April 4, 2009, by Anonymous

This was a neat example of an early state highway Parker truss on a decomissioned state highway. US 421 was shifted over to I-74 upon completion in the 60s, and the county took over the road and bridge and I'd say not maintaining well. The weight limit went down to two tons all of a sudden and the bridge was shut down after numerous semis were spotted crossing. Afterwards the county just threw it away! By the way thanks for adding the photo Tony!