US Bridges

Mo 89 S over Swan CR

Fair

Osage County, Missouri · S 16 T 42 N R 8 W · Structure no. 1171

Built
1964
61 years old, rebuilt 2023
Condition
Fair
inspected February 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
208 ft
3 main spans
Daily traffic
2,259
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 89 S over Swan CR is a steel continuous stringer/multi-beam or girder carrying Mo 89 S over Swan CR in Osage County, Missouri. It was built in 1964 and reconstructed in 2023, so it is 61 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 2,259 vehicles a day, roughly 10% of them trucks, projected to reach 3,276 by 2044. The structure is 208 ft (63.4 m) long and 31 ft wide. If it were closed, the detour would be 19.3 mi (31 km).

CarriesMo 89 S
CrossesSwan CR
LocationS 16 T 42 N R 8 W
RouteState Highway 89
Coordinates38.39284, -91.82416
Functional classRural Major 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
Deck9 ExcellentNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30.8 US tons
Inventory rating18.8 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length208 ft (63.4 m)
Longest span80 ft (24.4 m)
Deck width31 ft (9.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,259 (2024)
Projected traffic3,276 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.3 mi (31 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Mo 89 S over Swan CR built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 2023.

What condition is Mo 89 S over Swan 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 February 2025.

How much traffic does Mo 89 S over Swan CR carry?

About 2,259 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Mo 89 S over Swan CR?

The structure is 208 ft (63.4 m) long with a longest span of 80 ft (24.4 m) and a deck 31 ft wide.

Who owns Mo 89 S over Swan CR?

It is owned by the State Highway Agency.