US Bridges

County RD AA-20 over Swan CR

Good

Taney County, Missouri · S 10 T 24 N R 19 W · Structure no. 32147

Built
1997
28 years old
Condition
Good
inspected February 2025
Type
Slab
Concrete
Length
57 ft
3 main spans
Daily traffic
20
2023 count
Owner
County
County Highway Agency

About this bridge

County RD AA-20 over Swan CR is a concrete slab carrying County RD AA-20 over Swan CR in Taney County, Missouri. It was built in 1997, so it is 28 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 20 vehicles a day, roughly 10% of them trucks, projected to reach 40 by 2043. The structure is 57 ft (17.4 m) long and 22 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesCounty RD AA-20
CrossesSwan CR
LocationS 10 T 24 N R 19 W
RouteCounty Highway 57
CountyTaney County
StateMissouri
Coordinates36.78053, -93.03187
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
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 evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating29.8 US tons
Inventory rating17.9 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length57 ft (17.4 m)
Longest span17 ft (5.3 m)
Deck width22 ft (6.6 m)
Roadway width22 ft (6.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2023)
Projected traffic40 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD AA-20 over Swan CR built?

It was built in 1997, making it 28 years old in 2025.

What condition is County RD AA-20 over Swan CR in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2025.

How much traffic does County RD AA-20 over Swan CR carry?

About 20 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is County RD AA-20 over Swan CR?

The structure is 57 ft (17.4 m) long with a longest span of 17 ft (5.3 m) and a deck 22 ft wide.

Who owns County RD AA-20 over Swan CR?

It is owned by the County Highway Agency.