US Bridges

US 54 E over Long Br

Fair

Audrain County, Missouri · S 6 T 50 N R 8 W · Structure no. 3949

Built
1991
34 years old
Condition
Fair
inspected October 2023
Type
Tee Beam
Prestressed Concrete Continuous
Length
166 ft
5 main spans
Daily traffic
4,434
2024 count
Owner
State
State Highway Agency

About this bridge

US 54 E over Long Br is a prestressed concrete continuous tee beam carrying US 54 E over Long Br in Audrain County, Missouri. It was built in 1991, so it is 34 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 5 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 4,434 vehicles a day, roughly 27% of them trucks, projected to reach 6,873 by 2044. The structure is 166 ft (50.6 m) long and 46 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesUS 54 E
CrossesLong Br
LocationS 6 T 50 N R 8 W
RouteU.S. Route 54
CountyAudrain County
StateMissouri
Coordinates39.14356, -91.84662
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.5 US tons
Inventory rating34.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length166 ft (50.6 m)
Longest span34 ft (10.3 m)
Deck width46 ft (13.9 m)
Roadway width43 ft (13 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,434 (2024)
Projected traffic6,873 by 2044
Trucks27%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemYes

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 US 54 E over Long Br built?

It was built in 1991, making it 34 years old in 2025.

What condition is US 54 E over Long 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 October 2023.

How much traffic does US 54 E over Long Br carry?

About 4,434 vehicles per day (2024 count), of which roughly 27% are trucks.

How long is US 54 E over Long Br?

The structure is 166 ft (50.6 m) long with a longest span of 34 ft (10.3 m) and a deck 46 ft wide.

Who owns US 54 E over Long Br?

It is owned by the State Highway Agency.