US Bridges

Is 270 E over Cst Dorsett RD

Good

St. Louis County, Missouri · S 22 T 46 N R 5 E · Structure no. 32823

Built
2009
16 years old
Condition
Good
inspected August 2024
Type
Tee Beam
Prestressed Concrete Continuous
Length
156 ft
2 main spans
Daily traffic
138,108
2024 count
Owner
State
State Highway Agency

About this bridge

Is 270 E over Cst Dorsett RD is a prestressed concrete continuous tee beam carrying Is 270 E over Cst Dorsett RD in St. Louis County, Missouri. It was built in 2009, so it is 16 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 138,108 vehicles a day, roughly 12% of them trucks, projected to reach 172,635 by 2044. The structure is 156 ft (47.5 m) long and 131 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesIs 270 E
CrossesCst Dorsett RD
LocationS 22 T 46 N R 5 E
RouteInterstate 270
Coordinates38.71454, -90.44733
Functional classUrban Principal Arterial - Interstate

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 inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.5 US tons
Inventory rating39.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length156 ft (47.5 m)
Longest span76 ft (23.2 m)
Deck width131 ft (39.8 m)
Roadway width126 ft (38.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic138,108 (2024)
Projected traffic172,635 by 2044
Trucks12%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 Is 270 E over Cst Dorsett RD built?

It was built in 2009, making it 16 years old in 2025.

What condition is Is 270 E over Cst Dorsett RD 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 August 2024.

How much traffic does Is 270 E over Cst Dorsett RD carry?

About 138,108 vehicles per day (2024 count), of which roughly 12% are trucks.

How long is Is 270 E over Cst Dorsett RD?

The structure is 156 ft (47.5 m) long with a longest span of 76 ft (23.2 m) and a deck 131 ft wide.

Who owns Is 270 E over Cst Dorsett RD?

It is owned by the State Highway Agency.