US Bridges

Is 55 S over Cst Third ST

Good

Jefferson County, Missouri · S 416 T 40 N R 6 E · Structure no. 37281

Built
2024
1 years old
Condition
Good
inspected December 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
71 ft
1 main span
Daily traffic
70,419
2024 count
Owner
State
State Highway Agency

About this bridge

Is 55 S over Cst Third ST is a prestressed concrete box beam or girders - single or spread carrying Is 55 S over Cst Third ST 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.

It carries about 70,419 vehicles a day, roughly 15% of them trucks, projected to reach 130,275 by 2044. The structure is 71 ft (21.5 m) long and 115 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesIs 55 S
CrossesCst Third ST
LocationS 416 T 40 N R 6 E
RouteInterstate 55
Coordinates38.22156, -90.40639
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.

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
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

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length71 ft (21.5 m)
Longest span67 ft (20.4 m)
Deck width115 ft (35.1 m)
Roadway width55 ft (16.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic70,419 (2024)
Projected traffic130,275 by 2044
Trucks15%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
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 Cst Third ST built?

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

What condition is Is 55 S over Cst Third ST 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 December 2024.

How much traffic does Is 55 S over Cst Third ST carry?

About 70,419 vehicles per day (2024 count), of which roughly 15% are trucks.

How long is Is 55 S over Cst Third ST?

The structure is 71 ft (21.5 m) long with a longest span of 67 ft (20.4 m) and a deck 115 ft wide.

Who owns Is 55 S over Cst Third ST?

It is owned by the State Highway Agency.