US Bridges

Is 270 E over Rp IS70E to IS270E

Fair

St. Louis County, Missouri · S 729 T 46 N R 5 E · Structure no. 3115

Built
1979
46 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
372 ft
5 main spans
Daily traffic
70,299
2024 count
Owner
State
State Highway Agency

About this bridge

Is 270 E over Rp IS70E to IS270E is a prestressed concrete continuous stringer/multi-beam or girder carrying Is 270 E over Rp IS70E to IS270E in St. Louis County, Missouri. It was built in 1979, so it is 46 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 70,299 vehicles a day, roughly 18% of them trucks, projected to reach 87,874 by 2044. The structure is 372 ft (113.4 m) long and 66 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesIs 270 E
CrossesRp IS70E to IS270E
LocationS 729 T 46 N R 5 E
RouteInterstate 270
CountySt. Louis County
StateMissouri
Coordinates38.75023, -90.43906
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length372 ft (113.4 m)
Longest span85 ft (26 m)
Deck width66 ft (20 m)
Roadway width63 ft (19.1 m)
Vertical clearance over deck18 ft (5.5 m)

Traffic and service

Average daily traffic70,299 (2024)
Projected traffic87,874 by 2044
Trucks18%
Lanes on structure4
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 Rp IS70E to IS270E built?

It was built in 1979, making it 46 years old in 2025.

What condition is Is 270 E over Rp IS70E to IS270E 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 August 2024.

How much traffic does Is 270 E over Rp IS70E to IS270E carry?

About 70,299 vehicles per day (2024 count), of which roughly 18% are trucks.

How long is Is 270 E over Rp IS70E to IS270E?

The structure is 372 ft (113.4 m) long with a longest span of 85 ft (26 m) and a deck 66 ft wide.

Who owns Is 270 E over Rp IS70E to IS270E?

It is owned by the State Highway Agency.