US Bridges

Is 55 N over Saline CR

Fair

Perry County, Missouri · S 3015 T 36 N R 9 E · Structure no. 2120

Built
1970
55 years old, rebuilt 1984
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
324 ft
5 main spans
Daily traffic
9,485
2024 count
Owner
State
State Highway Agency

About this bridge

Is 55 N over Saline CR is a steel continuous stringer/multi-beam or girder carrying Is 55 N over Saline CR in Perry County, Missouri. It was built in 1970 and reconstructed in 1984, 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.

It carries about 9,485 vehicles a day, roughly 22% of them trucks, projected to reach 18,022 by 2044. The structure is 324 ft (98.8 m) long and 41 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesIs 55 N
CrossesSaline CR
LocationS 3015 T 36 N R 9 E
RouteInterstate 55
Coordinates37.83205, -89.98321
Functional classRural 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.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.6 US tons
Inventory rating29.8 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length324 ft (98.8 m)
Longest span72 ft (21.9 m)
Deck width41 ft (12.4 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,485 (2024)
Projected traffic18,022 by 2044
Trucks22%
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 Saline CR built?

It was built in 1970, making it 55 years old in 2025. It was reconstructed in 1984.

What condition is Is 55 N over Saline 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 November 2024.

How much traffic does Is 55 N over Saline CR carry?

About 9,485 vehicles per day (2024 count), of which roughly 22% are trucks.

How long is Is 55 N over Saline CR?

The structure is 324 ft (98.8 m) long with a longest span of 72 ft (21.9 m) and a deck 41 ft wide.

Who owns Is 55 N over Saline CR?

It is owned by the State Highway Agency.