US Bridges

Is 44 W over Union Pacific RR

FairPosted for load

St. Louis city, Missouri · S 20 T 45 N R 6 E · Structure no. 1845

Built
1970
55 years old, rebuilt 2018
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
231 ft
3 main spans
Daily traffic
43,840
2024 count
Owner
State
State Highway Agency

About this bridge

Is 44 W over Union Pacific RR is a steel continuous stringer/multi-beam or girder carrying Is 44 W over Union Pacific RR in St. Louis city, Missouri. It was built in 1970 and reconstructed in 2018, so it is 55 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. Its operating status is: posted for load restriction.

It carries about 43,840 vehicles a day, roughly 12% of them trucks, projected to reach 54,800 by 2044. The structure is 231 ft (70.4 m) long and 69 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesIs 44 W
CrossesUnion Pacific RR
LocationS 20 T 45 N R 6 E
RouteInterstate 44
CountySt. Louis city
StateMissouri
Coordinates38.61871, -90.26193
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.6 US tons
Inventory rating31.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length231 ft (70.4 m)
Longest span95 ft (29 m)
Deck width69 ft (21.1 m)
Roadway width67 ft (20.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic43,840 (2024)
Projected traffic54,800 by 2044
Trucks12%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed0.6 mi (1 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Is 44 W over Union Pacific RR built?

It was built in 1970, making it 55 years old in 2025. It was reconstructed in 2018.

What condition is Is 44 W over Union Pacific RR 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 Is 44 W over Union Pacific RR carry?

About 43,840 vehicles per day (2024 count), of which roughly 12% are trucks.

How long is Is 44 W over Union Pacific RR?

The structure is 231 ft (70.4 m) long with a longest span of 95 ft (29 m) and a deck 69 ft wide.

Who owns Is 44 W over Union Pacific RR?

It is owned by the State Highway Agency.