US Bridges

Is 270 E over Crd Marshall RD

FairPosted for load

St. Louis County, Missouri · S 10 T 44 N R 5 E · Structure no. 715

Built
1962
63 years old, rebuilt 1985
Condition
Fair
inspected June 2024
Type
Slab
Concrete Continuous
Length
174 ft
3 main spans
Daily traffic
79,646
2024 count
Owner
State
State Highway Agency

About this bridge

Is 270 E over Crd Marshall RD is a concrete continuous slab carrying Is 270 E over Crd Marshall RD in St. Louis County, Missouri. It was built in 1962 and reconstructed in 1985, so it is 63 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. Its operating status is: posted for load restriction.

It carries about 79,646 vehicles a day, roughly 18% of them trucks, projected to reach 99,558 by 2044. The structure is 174 ft (53 m) long and 64 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesIs 270 E
CrossesCrd Marshall RD
LocationS 10 T 44 N R 5 E
RouteInterstate 270
CountySt. Louis County
StateMissouri
Coordinates38.56267, -90.43928
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.5 US tons
Inventory rating34.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length174 ft (53 m)
Longest span75 ft (22.9 m)
Deck width64 ft (19.6 m)
Roadway width62 ft (18.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic79,646 (2024)
Projected traffic99,558 by 2044
Trucks18%
Lanes on structure5
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 Crd Marshall RD built?

It was built in 1962, making it 63 years old in 2025. It was reconstructed in 1985.

What condition is Is 270 E over Crd Marshall 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 Crd Marshall RD carry?

About 79,646 vehicles per day (2024 count), of which roughly 18% are trucks.

How long is Is 270 E over Crd Marshall RD?

The structure is 174 ft (53 m) long with a longest span of 75 ft (22.9 m) and a deck 64 ft wide.

Who owns Is 270 E over Crd Marshall RD?

It is owned by the State Highway Agency.