US Bridges

Natural Bridge RD over US 67 Rp US67S to Natur

Fair

St. Louis County, Missouri · S 12 T 46 N R 5 E · Structure no. 31419

Built
2006
19 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
535 ft
4 main spans
Daily traffic
6,069
2024 count
Owner
State
State Highway Agency

About this bridge

Natural Bridge RD over US 67 Rp US67S to Natur is a steel continuous stringer/multi-beam or girder carrying Natural Bridge RD over US 67 Rp US67S to Natur in St. Louis County, Missouri. It was built in 2006, so it is 19 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 6,069 vehicles a day, roughly 4% of them trucks, projected to reach 8,497 by 2044. The structure is 535 ft (163.1 m) long and 83 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesNatural Bridge RD
CrossesUS 67 Rp US67S to Natur
LocationS 12 T 46 N R 5 E
RouteCity Street 0
CountySt. Louis County
StateMissouri
Coordinates38.74979, -90.39451
Functional classUrban Minor 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 inspectionAugust 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 rating110.1 US tons
Inventory rating74.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length535 ft (163.1 m)
Longest span167 ft (50.9 m)
Deck width83 ft (25.2 m)
Roadway width80 ft (24.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,069 (2024)
Projected traffic8,497 by 2044
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 Natural Bridge RD over US 67 Rp US67S to Natur built?

It was built in 2006, making it 19 years old in 2025.

What condition is Natural Bridge RD over US 67 Rp US67S to Natur 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 Natural Bridge RD over US 67 Rp US67S to Natur carry?

About 6,069 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is Natural Bridge RD over US 67 Rp US67S to Natur?

The structure is 535 ft (163.1 m) long with a longest span of 167 ft (50.9 m) and a deck 83 ft wide.

Who owns Natural Bridge RD over US 67 Rp US67S to Natur?

It is owned by the State Highway Agency.