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 Photo taken by James Baughn

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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 

Street View 

Facts 

Overview

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

Status

Open to traffic

Future prospects

Westbound bridge scheduled for complete rehabilitation in 2011. When this occurs, all westbound traffic will be shifted to the eastbound bridge (three lanes each direction).

History

Westbound bridge built 1958; eastbound bridge built 1978

Design

Cantilevered Warren 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

+38.76412, -90.48242   (decimal degrees)
38°45'51" N, 90°28'57" W   (degrees°minutes'seconds")

Approximate UTM coordinates

15/718739/4293610 (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 09/2008)

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: 38.9 (out of 100)

Average daily traffic (as of 2008)

69,819

Categories 

Update Log 

• July 31, 2010: Updated by Mark Dellbringge: Updated future prospects
• 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
• Mark Dellbringge

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