US Bridges

Is 55 N over Joachim CR

Fair

Jefferson County, Missouri · S 19 T 41 N R 6 E · Structure no. 802

Built
1965
60 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
405 ft
3 main spans
Daily traffic
40,739
2024 count
Owner
State
State Highway Agency

About this bridge

Is 55 N over Joachim CR is a steel continuous stringer/multi-beam or girder carrying Is 55 N over Joachim CR in Jefferson County, Missouri. It was built in 1965, 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 40,739 vehicles a day, roughly 17% of them trucks, projected to reach 75,367 by 2044. The structure is 405 ft (123.4 m) long and 35 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesIs 55 N
CrossesJoachim CR
LocationS 19 T 41 N R 6 E
RouteInterstate 55
CountyJefferson County
StateMissouri
Coordinates38.26617, -90.4027
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.5 US tons
Inventory rating37.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length405 ft (123.4 m)
Longest span150 ft (45.7 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40,739 (2024)
Projected traffic75,367 by 2044
Trucks17%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Is 55 N over Joachim CR built?

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

What condition is Is 55 N over Joachim CR 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 55 N over Joachim CR carry?

About 40,739 vehicles per day (2024 count), of which roughly 17% are trucks.

How long is Is 55 N over Joachim CR?

The structure is 405 ft (123.4 m) long with a longest span of 150 ft (45.7 m) and a deck 35 ft wide.

Who owns Is 55 N over Joachim CR?

It is owned by the State Highway Agency.