US Bridges

Rt K S over Is 55

Fair

Perry County, Missouri · S 36 T 35 N R 10 E · Structure no. 2158

Built
1970
55 years old, rebuilt 1984
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
270 ft
4 main spans
Daily traffic
995
2024 count
Owner
State
State Highway Agency

About this bridge

Rt K S over Is 55 is a steel continuous stringer/multi-beam or girder carrying Rt K S over Is 55 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 5 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 995 vehicles a day, roughly 7% of them trucks, projected to reach 1,393 by 2044. The structure is 270 ft (82.3 m) long and 37 ft wide. If it were closed, the detour would be 24.2 mi (39 km).

CarriesRt K S
CrossesIs 55
LocationS 36 T 35 N R 10 E
RouteState Highway 0K
Coordinates37.68855, -89.87471
Functional classUrban Collector

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating31.7 US tons
Inventory rating17.9 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length270 ft (82.3 m)
Longest span92 ft (28 m)
Deck width37 ft (11.2 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic995 (2024)
Projected traffic1,393 by 2044
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed24.2 mi (39 km)
TollOn a free road
National Highway SystemNo

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 Rt K S over Is 55 built?

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

What condition is Rt K S over Is 55 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 September 2023.

How much traffic does Rt K S over Is 55 carry?

About 995 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is Rt K S over Is 55?

The structure is 270 ft (82.3 m) long with a longest span of 92 ft (28 m) and a deck 37 ft wide.

Who owns Rt K S over Is 55?

It is owned by the State Highway Agency.