Photos 

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East end

Photos taken April 2004 by David Backlin
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West end

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Gasconade Bridge Side View

one truss section shot from I-44 Bridge

Photo taken by Kim Harvey

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Gasconade Bridge Side View

another truss section shot from I-44 Bridge (hint: take pictures in the winter time, trees block the view)

Photo taken by Kim Harvey

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Overview from West End

Photo taken by David Backlin in April 2008

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West Approach

Photo taken by David Backlin in April 2008

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East Portal

Photo taken by David Backlin in April 2008

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Behind West Portal

Photo taken by David Backlin in April 2008

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Deck View

Photo taken by David Backlin in April 2008

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Underside of Deck

Photo taken by David Backlin in April 2008

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Cracked Support

Photo taken by David Backlin in April 2008

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View of Railing

Photo taken by David Backlin in April 2008

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Damaged Curbing

Photo taken by David Backlin in April 2008

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Map 

Vicinity Map

Vicinity map

Map links:

Facts 

Overview
Three-span through truss bridge over Gasconade River on Old US 66 near Hazelgreen
Location
Laclede County, Missouri
Status
Open to traffic
History
Built 1922
Design
From west to east:
One 8-panel Warren pony truss with alternating verticals
Two 8-panel Parker through trusses
One 6-panel Pratt through truss
Dimensions
Length of largest span: 161.7 ft.
Total length: 525.8 ft.
Deck width: 20.0 ft.
Vertical clearance above deck: 13.8 ft.
Recognition
Eligible for the National Register of Historic Places
Approximate latitude, longitude
+37.75919, -92.45150   (decimal degrees)
37°45'33" N, 92°27'05" W   (degrees°minutes'seconds")
Approximate UTM coordinates
15/548314/4179238 (zone/easting/northing)
Land survey
T. 35 N., R. 14 W., Sec. 15
USGS topographic map
Richland
Inventory numbers
MoDOT G-245 (Missouri Dept. of Transportation bridge number)
MONBI 4570 (Missouri bridge number on the National Bridge Inventory)
BH 21827 (Bridgehunter.com ID)
Inspection (as of 10/2007)
Deck condition rating: Poor (4 out of 9)
Superstructure condition rating: Fair (5 out of 9)
Substructure condition rating: Fair (5 out of 9)
Appraisal: Structurally deficient
Sufficiency rating: 40.1 (out of 100)
Average daily traffic (as of 2006)
422

Categories 

Built 1922 (337)
Built during 1920s (4,371)
Functionally obsolete (5,279)
Gasconade River (12)
Laclede County, Missouri (10)
Missouri (2,485)
NR-eligible (2,576)
Open (21,926)
Owned by state (6,683)
Parker truss (448)
Span length 125-175 feet (2,034)
Structurally deficient (11,145)
Through truss (5,436)
Total length 500-1000 feet (1,032)
Truss (16,099)
US 66 (29)

Update Log 

Sources 

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Comments 

Gasconade River Old US 66 Bridge
Posted July 28, 2008, by David Backlin (us71 [at] cox [dot] net)

I added some new photos including a couple re-shoots with a better camera.