US Bridges

Loughborough Ave W over Is 55 Is 55

Fair

St. Louis city, Missouri · S 17 T 44 N R 7 E · Structure no. 869

Built
1963
62 years old, rebuilt 1986
Condition
Fair
inspected August 2023
Type
Slab
Concrete Continuous
Length
209 ft
4 main spans
Daily traffic
2,689
2024 count
Owner
State
State Highway Agency

About this bridge

Loughborough Ave W over Is 55 Is 55 is a concrete continuous slab carrying Loughborough Ave W over Is 55 Is 55 in St. Louis city, Missouri. It was built in 1963 and reconstructed in 1986, so it is 62 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 2,689 vehicles a day, roughly 5% of them trucks, projected to reach 3,765 by 2044. The structure is 209 ft (63.7 m) long and 42 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesLoughborough Ave W
CrossesIs 55 Is 55
LocationS 17 T 44 N R 7 E
RouteCity Street 0
CountySt. Louis city
StateMissouri
Coordinates38.55679, -90.25923
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2023
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83.3 US tons
Inventory rating50.6 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length209 ft (63.7 m)
Longest span68 ft (20.7 m)
Deck width42 ft (12.7 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,689 (2024)
Projected traffic3,765 by 2044
Trucks5%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

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 Loughborough Ave W over Is 55 Is 55 built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 1986.

What condition is Loughborough Ave W over Is 55 Is 55 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 2023.

How much traffic does Loughborough Ave W over Is 55 Is 55 carry?

About 2,689 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Loughborough Ave W over Is 55 Is 55?

The structure is 209 ft (63.7 m) long with a longest span of 68 ft (20.7 m) and a deck 42 ft wide.

Who owns Loughborough Ave W over Is 55 Is 55?

It is owned by the State Highway Agency.