US Bridges

Rt Aa S over Swan CR

PoorPosted for load

Taney County, Missouri · S 1 T 24 N R 20 W · Structure no. 8487

Built
1966
59 years old
Condition
Poor
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
312 ft
4 main spans
Daily traffic
334
2024 count
Owner
State
State Highway Agency

About this bridge

Rt Aa S over Swan CR is a steel continuous stringer/multi-beam or girder carrying Rt Aa S over Swan CR in Taney County, Missouri. It was built in 1966, so it is 59 years old, older than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 334 vehicles a day, roughly 12% of them trucks, projected to reach 701 by 2044. The structure is 312 ft (95.1 m) long and 29 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesRt Aa S
CrossesSwan CR
LocationS 1 T 24 N R 20 W
RouteState Highway 0AA
Coordinates36.78711, -93.0596
Functional classRural Minor Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating21.8 US tons
Inventory rating8.9 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length312 ft (95.1 m)
Longest span90 ft (27.4 m)
Deck width29 ft (8.7 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic334 (2024)
Projected traffic701 by 2044
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.7 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Rt Aa S over Swan CR built?

It was built in 1966, making it 59 years old in 2025.

What condition is Rt Aa S over Swan CR in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2024.

How much traffic does Rt Aa S over Swan CR carry?

About 334 vehicles per day (2024 count), of which roughly 12% are trucks.

How long is Rt Aa S over Swan CR?

The structure is 312 ft (95.1 m) long with a longest span of 90 ft (27.4 m) and a deck 29 ft wide.

Who owns Rt Aa S over Swan CR?

It is owned by the State Highway Agency.