US Bridges

Aurora ST over Unnamed Br

Fair

Macon County, Missouri · S 20 T 59 N R 17 W · Structure no. 22327

Built
1989
36 years old, rebuilt 2003
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
37 ft
1 main span
Daily traffic
25
2024 count
Owner
County
County Highway Agency

About this bridge

Aurora ST over Unnamed Br is a steel stringer/multi-beam or girder carrying Aurora ST over Unnamed Br in Macon County, Missouri. It was built in 1989 and reconstructed in 2003, so it is 36 years old, younger 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 25 vehicles a day, roughly 10% of them trucks, projected to reach 28 by 2044. The structure is 37 ft (11.3 m) long and 16 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

Open in Google Maps
CarriesAurora ST
CrossesUnnamed Br
LocationS 20 T 59 N R 17 W
RouteCounty Highway 351
CountyMacon County
StateMissouri
Coordinates39.91636, -92.82372
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110.1 US tons
Inventory rating86.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length37 ft (11.3 m)
Longest span35 ft (10.8 m)
Deck width16 ft (4.9 m)
Roadway width15 ft (4.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2024)
Projected traffic28 by 2044
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Aurora ST over Unnamed Br built?

It was built in 1989, making it 36 years old in 2025. It was reconstructed in 2003.

What condition is Aurora ST over Unnamed 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 February 2024.

How much traffic does Aurora ST over Unnamed Br carry?

About 25 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Aurora ST over Unnamed Br?

The structure is 37 ft (11.3 m) long with a longest span of 35 ft (10.8 m) and a deck 16 ft wide.

Who owns Aurora ST over Unnamed Br?

It is owned by the County Highway Agency.