Blanchette Bridge

Photos 

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Side view from downstream Photo taken by James Baughn in March 2009 View high-res version

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Silhouette at sunset Photo taken by James Baughn in March 2009 View high-res version

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Between spans Photo taken by James Baughn in March 2009 View high-res version

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View from St. Charles Riverfront

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Sunset behind bridge Photo taken by James Baughn View high-res version

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Driving across at sunset Photo taken by James Baughn View high-res version

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Driving across westbound

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Approaching eastbound Photo taken by James Baughn in March 2009 View high-res version

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West portal Photo taken by James Baughn in March 2009 View high-res version

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Driving across eastbound Photo taken by James Baughn in August 2008 View high-res version

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East approach Photo taken by James Baughn in November 2008 View high-res version

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Portal joints Photo taken by James Baughn in November 2008 View high-res version

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Underneath Photo taken by James Baughn in March 2009 View high-res version

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Concrete pier Photo taken by James Baughn in November 2008 View high-res version

Map 

Vicinity map Map links: Google Maps Yahoo! Maps TopoZone Terraserver USA

Facts 

Overview

Pair of cantilevered through truss bridges over the Missouri River on I-70 at St. Charles

Status

Open to traffic

History

Westbound bridge built 1958; eastbound bridge built 1978

Design

Cantilevered through truss

Dimensions

Length of largest span: 480.0 ft.
Total length: 4,083.2 ft.
Deck width: 67.9 ft.
Vertical clearance above deck: 19.8 ft.

Approximate latitude, longitude

+38.76606, -90.48555   (decimal degrees)
38°45'58" N, 90°29'08" W   (degrees°minutes'seconds")

Approximate UTM coordinates

15/718461/4293818 (zone/easting/northing)

Land survey

T. 47 N., R. 5 E., Sec. 32

USGS topographic map

Saint Charles

Inventory numbers

MoDOT L-05616 (Missouri Dept. of Transportation bridge number)
MONBI 6672 (Missouri bridge number on the National Bridge Inventory)
BH 22568 (Bridgehunter.com ID)

Inspection (as of 09/2006)

Deck condition rating: Fair (5 out of 9)
Superstructure condition rating: Fair (5 out of 9)
Substructure condition rating: Satisfactory (6 out of 9)
Appraisal: Functionally obsolete
Sufficiency rating: 41.4 (out of 100)

Average daily traffic (as of 2006)

69,559

Categories 

Update Log 

• March 10, 2009: New photos from James Baughn
• June 4, 2008: New photos from James Baughn
• January 23, 2006: Posted new photos

Sources 

• James Baughn - webmaster [at] bridgehunter [dot] com
• Wikipedia

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