US Bridges

Is 64 W over Is 44 Cst 4th ST Cst

FairPosted for load

St. Louis city, Missouri · S 23 T 45 N R 7 E · Structure no. 1246

Built
1964
61 years old
Condition
Fair
inspected September 2024
Type
Girder and Floorbeam System
Steel Continuous
Length
7,847 ft
6 main spans
Daily traffic
32,011
2024 count
Owner
State
State Highway Agency

About this bridge

Is 64 W over Is 44 Cst 4th ST Cst is a steel continuous girder and floorbeam system carrying Is 64 W over Is 44 Cst 4th ST Cst in St. Louis city, Missouri. It was built in 1964, so it is 61 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. Its operating status is: posted for load restriction.

It carries about 32,011 vehicles a day, roughly 18% of them trucks, projected to reach 40,014 by 2044. The structure is 7,847 ft (2,391.8 m) long and 34 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesIs 64 W
CrossesIs 44 Cst 4th ST Cst
LocationS 23 T 45 N R 7 E
RouteInterstate 64
CountySt. Louis city
StateMissouri
Coordinates38.62341, -90.20133
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
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.7 US tons
Inventory rating22.8 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans6 (+77 approach)
Design loadHS 20
Structure length7,847 ft (2,391.8 m)
Longest span255 ft (77.6 m)
Deck width34 ft (10.3 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic32,011 (2024)
Projected traffic40,014 by 2044
Trucks18%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed9.9 mi (16 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$239.3 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Is 64 W over Is 44 Cst 4th ST Cst built?

It was built in 1964, making it 61 years old in 2025.

What condition is Is 64 W over Is 44 Cst 4th ST Cst 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 64 W over Is 44 Cst 4th ST Cst carry?

About 32,011 vehicles per day (2024 count), of which roughly 18% are trucks.

How long is Is 64 W over Is 44 Cst 4th ST Cst?

The structure is 7,847 ft (2,391.8 m) long with a longest span of 255 ft (77.6 m) and a deck 34 ft wide.

Who owns Is 64 W over Is 44 Cst 4th ST Cst?

It is owned by the State Highway Agency.