US Bridges

Rt Aa E over Swan Br

Fair

Washington County, Missouri · S 6 T 37 N R 2 E · Structure no. 7241

Built
1960
65 years old
Condition
Fair
inspected June 2024
Type
Culvert
Concrete Continuous
Length
41 ft
3 main spans
Daily traffic
160
2024 count
Owner
State
State Highway Agency

About this bridge

Rt Aa E over Swan Br is a concrete continuous culvert carrying Rt Aa E over Swan Br in Washington County, Missouri. It was built in 1960, so it is 65 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 160 vehicles a day, roughly 11% of them trucks, projected to reach 224 by 2044. The structure is 41 ft (12.5 m) long and 26 ft wide. If it were closed, the detour would be 24.2 mi (39 km).

Location

Open in Google Maps
CarriesRt Aa E
CrossesSwan Br
LocationS 6 T 37 N R 2 E
RouteState Highway 0AA
CountyWashington County
StateMissouri
Coordinates37.96477, -90.85739
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating67.5 US tons
Inventory rating40.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadH 15
Structure length41 ft (12.5 m)
Longest span12 ft (3.7 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic160 (2024)
Projected traffic224 by 2044
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Rt Aa E over Swan Br built?

It was built in 1960, making it 65 years old in 2025.

What condition is Rt Aa E over Swan Br 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 June 2024.

How much traffic does Rt Aa E over Swan Br carry?

About 160 vehicles per day (2024 count), of which roughly 11% are trucks.

How long is Rt Aa E over Swan Br?

The structure is 41 ft (12.5 m) long with a longest span of 12 ft (3.7 m) and a deck 26 ft wide.

Who owns Rt Aa E over Swan Br?

It is owned by the State Highway Agency.