US Bridges

Rt U S over Is 70

Fair

St. Louis County, Missouri · S 24 T 46 N R 6 E · Structure no. 12026

Built
2001
24 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
191 ft
2 main spans
Daily traffic
18,645
2024 count
Owner
State
State Highway Agency

About this bridge

Rt U S over Is 70 is a steel continuous stringer/multi-beam or girder carrying Rt U S over Is 70 in St. Louis County, Missouri. It was built in 2001, so it is 24 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 18,645 vehicles a day, roughly 6% of them trucks, projected to reach 26,103 by 2044. The structure is 191 ft (58.2 m) long and 99 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesRt U S
CrossesIs 70
LocationS 24 T 46 N R 6 E
RouteState Highway 0U
Coordinates38.71098, -90.28575
Functional classUrban Other Principal Arterial

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.
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 rating79.4 US tons
Inventory rating47.6 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length191 ft (58.2 m)
Longest span95 ft (29.1 m)
Deck width99 ft (30.1 m)
Roadway width96 ft (29.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,645 (2024)
Projected traffic26,103 by 2044
Trucks6%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes

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 Rt U S over Is 70 built?

It was built in 2001, making it 24 years old in 2025.

What condition is Rt U S over Is 70 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 Rt U S over Is 70 carry?

About 18,645 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is Rt U S over Is 70?

The structure is 191 ft (58.2 m) long with a longest span of 95 ft (29.1 m) and a deck 99 ft wide.

Who owns Rt U S over Is 70?

It is owned by the State Highway Agency.