Is 55 S over UP RR Desoto Sub

Good

Jefferson County, Missouri · S 420 T 41 N R 6 E · Structure no. 37279

Built: 2024; 1 years old
Condition: Good; inspected June 2023
Type: Tee Beam; Prestressed Concrete
Length: 118 ft; 1 main span
Daily traffic: 80,923; 2024 count
Owner: State; State Highway Agency

About this bridge

Is 55 S over UP RR Desoto Sub is a prestressed concrete tee beam carrying Is 55 S over UP RR Desoto Sub in Jefferson County, Missouri. It was built in 2024, so it is 1 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. Its operating status is: new structure not yet open to traffic.

It carries about 80,923 vehicles a day, roughly 15% of them trucks, projected to reach 149,708 by 2044. The structure is 118 ft (36 m) long and 137 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesIs 55 S

CrossesUP RR Desoto Sub

LocationS 420 T 41 N R 6 E

RouteInterstate 55

CountyJefferson County

StateMissouri

Coordinates38.28346, -90.4034

Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

Component	Rating	Meaning
Deck	9 Excellent	No problems noted.
Superstructure	9 Excellent	No problems noted.
Substructure	9 Excellent	No problems noted.

Last inspectionJune 2023

Inspection intervalevery 24 months

Operating statusNew structure not yet open to traffic

ScourBridge not over waterway

Structural evaluation9: Superior to present desirable criteria

Deck geometry2: Basically intolerable, requiring high priority of replacement

Approach roadway alignment8: Equal to present desirable criteria

Operating rating74.4 US tons

Inventory rating44.6 US tons

Structure

Structure typeTee Beam

MaterialPrestressed Concrete

DeckConcrete, cast-in-place

Main spans1

Design loadHL 93

Structure length118 ft (36 m)

Longest span115 ft (35.1 m)

Deck width137 ft (41.7 m)

Roadway width66 ft (20.1 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic80,923 (2024)

Projected traffic149,708 by 2044

Trucks15%

Lanes on structure8

Traffic directionTwo-way traffic

CarriesHighway

CrossesRailroad

Detour if closed1.2 mi (2 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 statusHistorical significance not determinable at this time

Work proposedNone recorded

Estimated improvement cost—

NavigationNot applicable (no waterway)

Frequently asked questions

When was Is 55 S over UP RR Desoto Sub built?

It was built in 2024, making it 1 years old in 2025.

What condition is Is 55 S over UP RR Desoto Sub in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2023.

How much traffic does Is 55 S over UP RR Desoto Sub carry?

About 80,923 vehicles per day (2024 count), of which roughly 15% are trucks.

How long is Is 55 S over UP RR Desoto Sub?

The structure is 118 ft (36 m) long with a longest span of 115 ft (35.1 m) and a deck 137 ft wide.

Who owns Is 55 S over UP RR Desoto Sub?

It is owned by the State Highway Agency.