US Bridges

Bu 54 E over C & a Lake

Fair

Audrain County, Missouri · S 25 T 51 N R 9 W · Structure no. 4522

Built
1922
103 years old, rebuilt 1932
Condition
Fair
inspected October 2023
Type
Culvert
Concrete Continuous
Length
54 ft
6 main spans
Daily traffic
6,481
2024 count
Owner
State
State Highway Agency

About this bridge

Bu 54 E over C & a Lake is a concrete continuous culvert carrying Bu 54 E over C & a Lake in Audrain County, Missouri. It was built in 1922 and reconstructed in 1932, so it is 103 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 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 6,481 vehicles a day, roughly 14% of them trucks, projected to reach 10,046 by 2044. The structure is 54 ft (16.5 m) long and 49 ft wide. If it were closed, the detour would be 24.2 mi (39 km).

Location

Open in Google Maps
CarriesBu 54 E
CrossesC & a Lake
LocationS 25 T 51 N R 9 W
RouteState Highway 54
CountyAudrain County
StateMissouri
Coordinates39.16832, -91.86551
Functional classUrban Minor 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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.7 US tons
Inventory rating25.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans6
Design loadH 15
Structure length54 ft (16.5 m)
Longest span8 ft (2.3 m)
Deck width49 ft (14.9 m)
Roadway width47 ft (14.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,481 (2024)
Projected traffic10,046 by 2044
Trucks14%
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 Bu 54 E over C & a Lake built?

It was built in 1922, making it 103 years old in 2025. It was reconstructed in 1932.

What condition is Bu 54 E over C & a Lake 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 Bu 54 E over C & a Lake carry?

About 6,481 vehicles per day (2024 count), of which roughly 14% are trucks.

How long is Bu 54 E over C & a Lake?

The structure is 54 ft (16.5 m) long with a longest span of 8 ft (2.3 m) and a deck 49 ft wide.

Who owns Bu 54 E over C & a Lake?

It is owned by the State Highway Agency.