US Bridges

Is 70 E over Mo 141

Fair

St. Louis County, Missouri · S 4 T 46 N R 5 E · Structure no. 2732

Built
1971
54 years old, rebuilt 1987
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
175 ft
4 main spans
Daily traffic
159,362
2024 count
Owner
State
State Highway Agency

About this bridge

Is 70 E over Mo 141 is a steel stringer/multi-beam or girder carrying Is 70 E over Mo 141 in St. Louis County, Missouri. It was built in 1971 and reconstructed in 1987, so it is 54 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 5 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 159,362 vehicles a day, roughly 12% of them trucks, projected to reach 199,203 by 2044. The structure is 175 ft (53.3 m) long and 177 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesIs 70 E
CrossesMo 141
LocationS 4 T 46 N R 5 E
RouteInterstate 70
CountySt. Louis County
StateMissouri
Coordinates38.75557, -90.45863
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.7 US tons
Inventory rating25.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length175 ft (53.3 m)
Longest span55 ft (16.8 m)
Deck width177 ft (54.1 m)
Roadway width176 ft (53.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic159,362 (2024)
Projected traffic199,203 by 2044
Trucks12%
Lanes on structure12
Traffic directionTwo-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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$5.7 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Is 70 E over Mo 141 built?

It was built in 1971, making it 54 years old in 2025. It was reconstructed in 1987.

What condition is Is 70 E over Mo 141 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 September 2024.

How much traffic does Is 70 E over Mo 141 carry?

About 159,362 vehicles per day (2024 count), of which roughly 12% are trucks.

How long is Is 70 E over Mo 141?

The structure is 175 ft (53.3 m) long with a longest span of 55 ft (16.8 m) and a deck 177 ft wide.

Who owns Is 70 E over Mo 141?

It is owned by the State Highway Agency.