US Bridges

Or 270 E over Is 270

Fair

St. Louis County, Missouri · S 32 T 47 N R 7 E · Structure no. 36415

Built
2020
5 years old
Condition
Fair
inspected August 2024
Type
Tee Beam
Prestressed Concrete Continuous
Length
172 ft
2 main spans
Daily traffic
3,297
2024 count
Owner
State
State Highway Agency

About this bridge

Or 270 E over Is 270 is a prestressed concrete continuous tee beam carrying Or 270 E over Is 270 in St. Louis County, Missouri. It was built in 2020, so it is 5 years old, younger 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 3,297 vehicles a day, roughly 3% of them trucks, projected to reach 4,946 by 2044. The structure is 172 ft (52.3 m) long and 53 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesOr 270 E
CrossesIs 270
LocationS 32 T 47 N R 7 E
RouteState Highway 270
CountySt. Louis County
StateMissouri
Coordinates38.77073, -90.24514
Functional classUrban Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating88.3 US tons
Inventory rating33.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length172 ft (52.3 m)
Longest span84 ft (25.6 m)
Deck width53 ft (16.1 m)
Roadway width42 ft (12.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,297 (2024)
Projected traffic4,946 by 2044
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 Or 270 E over Is 270 built?

It was built in 2020, making it 5 years old in 2025.

What condition is Or 270 E over Is 270 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 Or 270 E over Is 270 carry?

About 3,297 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is Or 270 E over Is 270?

The structure is 172 ft (52.3 m) long with a longest span of 84 ft (25.6 m) and a deck 53 ft wide.

Who owns Or 270 E over Is 270?

It is owned by the State Highway Agency.