US Bridges

Is 270 E over Cst Rott RD

Fair

St. Louis County, Missouri · S 23 T 44 N R 5 E · Structure no. 825

Built
1967
58 years old, rebuilt 1992
Condition
Fair
inspected June 2024
Type
Slab
Concrete Continuous
Length
144 ft
3 main spans
Daily traffic
85,345
2024 count
Owner
State
State Highway Agency

About this bridge

Is 270 E over Cst Rott RD is a concrete continuous slab carrying Is 270 E over Cst Rott RD in St. Louis County, Missouri. It was built in 1967 and reconstructed in 1992, so it is 58 years old, older than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 85,345 vehicles a day, roughly 12% of them trucks, projected to reach 106,681 by 2044. The structure is 144 ft (43.9 m) long and 85 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesIs 270 E
CrossesCst Rott RD
LocationS 23 T 44 N R 5 E
RouteInterstate 270
Coordinates38.54204, -90.42026
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.5 US tons
Inventory rating37.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length144 ft (43.9 m)
Longest span55 ft (16.8 m)
Deck width85 ft (25.8 m)
Roadway width82 ft (25 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic85,345 (2024)
Projected traffic106,681 by 2044
Trucks12%
Lanes on structure6
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 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 statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Is 270 E over Cst Rott RD built?

It was built in 1967, making it 58 years old in 2025. It was reconstructed in 1992.

What condition is Is 270 E over Cst Rott RD in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2024.

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

About 85,345 vehicles per day (2024 count), of which roughly 12% are trucks.

How long is Is 270 E over Cst Rott RD?

The structure is 144 ft (43.9 m) long with a longest span of 55 ft (16.8 m) and a deck 85 ft wide.

Who owns Is 270 E over Cst Rott RD?

It is owned by the State Highway Agency.