US Bridges

Is 70 E over Cst Airflight DR

Good

St. Louis County, Missouri · S 168 T 46 N R 6 E · Structure no. 12018

Built
2000
25 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
153 ft
2 main spans
Daily traffic
141,917
2024 count
Owner
State
State Highway Agency

About this bridge

Is 70 E over Cst Airflight DR is a steel continuous stringer/multi-beam or girder carrying Is 70 E over Cst Airflight DR in St. Louis County, Missouri. It was built in 2000, so it is 25 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 141,917 vehicles a day, roughly 18% of them trucks, projected to reach 177,396 by 2044. The structure is 153 ft (46.6 m) long and 135 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesIs 70 E
CrossesCst Airflight DR
LocationS 168 T 46 N R 6 E
RouteInterstate 70
Coordinates38.73941, -90.36626
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 inspectionSeptember 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 rating97.2 US tons
Inventory rating58.5 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length153 ft (46.6 m)
Longest span96 ft (29.4 m)
Deck width135 ft (41.1 m)
Roadway width130 ft (39.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic141,917 (2024)
Projected traffic177,396 by 2044
Trucks18%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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 70 E over Cst Airflight DR built?

It was built in 2000, making it 25 years old in 2025.

What condition is Is 70 E over Cst Airflight DR 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 September 2024.

How much traffic does Is 70 E over Cst Airflight DR carry?

About 141,917 vehicles per day (2024 count), of which roughly 18% are trucks.

How long is Is 70 E over Cst Airflight DR?

The structure is 153 ft (46.6 m) long with a longest span of 96 ft (29.4 m) and a deck 135 ft wide.

Who owns Is 70 E over Cst Airflight DR?

It is owned by the State Highway Agency.