US Bridges

US 54 E over Mams CR

Fair

Audrain County, Missouri · S 26 T 51 N R 7 W · Structure no. 4950

Built
1956
69 years old, rebuilt 1992
Condition
Fair
inspected October 2023
Type
Slab
Concrete Continuous
Length
92 ft
3 main spans
Daily traffic
4,454
2024 count
Owner
State
State Highway Agency

About this bridge

US 54 E over Mams CR is a concrete continuous slab carrying US 54 E over Mams CR in Audrain County, Missouri. It was built in 1956 and reconstructed in 1992, so it is 69 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 4,454 vehicles a day, roughly 28% of them trucks, projected to reach 8,463 by 2044. The structure is 92 ft (28 m) long and 32 ft wide. If it were closed, the detour would be 19.3 mi (31 km).

Location

Open in Google Maps
CarriesUS 54 E
CrossesMams CR
LocationS 26 T 51 N R 7 W
RouteU.S. Route 54
CountyAudrain County
StateMissouri
Coordinates39.1631, -91.66091
Functional classRural Principal Arterial - Other

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length92 ft (28 m)
Longest span31 ft (9.5 m)
Deck width32 ft (9.7 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,454 (2024)
Projected traffic8,463 by 2044
Trucks28%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.3 mi (31 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 US 54 E over Mams CR built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 1992.

What condition is US 54 E over Mams CR 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 Mams CR carry?

About 4,454 vehicles per day (2024 count), of which roughly 28% are trucks.

How long is US 54 E over Mams CR?

The structure is 92 ft (28 m) long with a longest span of 31 ft (9.5 m) and a deck 32 ft wide.

Who owns US 54 E over Mams CR?

It is owned by the State Highway Agency.