US Bridges

Is 44 E over Is 55 Cst 12th ST Is

Fair

St. Louis city, Missouri · S 27 T 45 N R 7 E · Structure no. 893

Built
1965
60 years old, rebuilt 1990
Condition
Fair
inspected December 2024
Type
Box Beam or Girders - Single or Spread
Concrete Continuous
Length
733 ft
10 main spans
Daily traffic
48,224
2024 count
Owner
State
State Highway Agency

About this bridge

Is 44 E over Is 55 Cst 12th ST Is is a concrete continuous box beam or girders - single or spread carrying Is 44 E over Is 55 Cst 12th ST Is in St. Louis city, Missouri. It was built in 1965 and reconstructed in 1990, so it is 60 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 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 48,224 vehicles a day, roughly 12% of them trucks, projected to reach 60,280 by 2044. The structure is 733 ft (223.4 m) long and 33 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesIs 44 E
CrossesIs 55 Cst 12th ST Is
LocationS 27 T 45 N R 7 E
RouteInterstate 44
CountySt. Louis city
StateMissouri
Coordinates38.61007, -90.20988
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.4 US tons
Inventory rating42.7 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans10
Design loadHS 20 + Mod
Structure length733 ft (223.4 m)
Longest span95 ft (28.9 m)
Deck width33 ft (10 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic48,224 (2024)
Projected traffic60,280 by 2044
Trucks12%
Lanes on structure2
Traffic directionOne-way traffic
CarriesThird level (interchange)
CrossesHighway
Detour if closed5 mi (8 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$4.6 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Is 44 E over Is 55 Cst 12th ST Is built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 1990.

What condition is Is 44 E over Is 55 Cst 12th ST Is 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 December 2024.

How much traffic does Is 44 E over Is 55 Cst 12th ST Is carry?

About 48,224 vehicles per day (2024 count), of which roughly 12% are trucks.

How long is Is 44 E over Is 55 Cst 12th ST Is?

The structure is 733 ft (223.4 m) long with a longest span of 95 ft (28.9 m) and a deck 33 ft wide.

Who owns Is 44 E over Is 55 Cst 12th ST Is?

It is owned by the State Highway Agency.