US Bridges

Convention Center over Is 70

Good

St. Charles County, Missouri · S 3280 T 46 N R 5 E · Structure no. 35182

Built
2016
9 years old
Condition
Good
inspected October 2023
Type
Tee Beam
Prestressed Concrete Continuous
Length
178 ft
2 main spans
Daily traffic
7,000
2024 count
Owner
State
State Highway Agency

About this bridge

Convention Center over Is 70 is a prestressed concrete continuous tee beam carrying Convention Center over Is 70 in St. Charles County, Missouri. It was built in 2016, so it is 9 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 7,000 vehicles a day, roughly 10% of them trucks, projected to reach 13,650 by 2044. The structure is 178 ft (54.4 m) long and 74 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesConvention Center
CrossesIs 70
LocationS 3280 T 46 N R 5 E
RouteCity Street 0
CountySt. Charles County
StateMissouri
Coordinates38.77094, -90.50036
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.4 US tons
Inventory rating24.8 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length178 ft (54.4 m)
Longest span88 ft (26.7 m)
Deck width74 ft (22.5 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deck17 ft (5.1 m)

Traffic and service

Average daily traffic7,000 (2024)
Projected traffic13,650 by 2044
Trucks10%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Convention Center over Is 70 built?

It was built in 2016, making it 9 years old in 2025.

What condition is Convention Center over Is 70 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2023.

How much traffic does Convention Center over Is 70 carry?

About 7,000 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Convention Center over Is 70?

The structure is 178 ft (54.4 m) long with a longest span of 88 ft (26.7 m) and a deck 74 ft wide.

Who owns Convention Center over Is 70?

It is owned by the State Highway Agency.