Historic Bridges of the U.S. | Blanchette Bridge

Photos

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View from St. Charles Riverfront

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Driving across westbound

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Driving across at sunset

Photo taken by James Baughn

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Sunset behind bridge

Photo taken by James Baughn

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")
Land survey: T. 47 N., R. 5 E., Sec. 32
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: Structurally deficient
Sufficiency rating: 31.6 (out of 100)
Average daily traffic (as of 2005): 69,559