US Bridges

Mo 15 S over US 54

Fair

Audrain County, Missouri · S 14 T 50 N R 9 W · Structure no. 3847

Built
1991
34 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
312 ft
2 main spans
Daily traffic
8,255
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 15 S over US 54 is a steel continuous stringer/multi-beam or girder carrying Mo 15 S over US 54 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 8,255 vehicles a day, roughly 13% of them trucks, projected to reach 12,795 by 2044. The structure is 312 ft (95.1 m) long and 46 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesMo 15 S
CrossesUS 54
LocationS 14 T 50 N R 9 W
RouteState Highway 15
CountyAudrain County
StateMissouri
Coordinates39.11721, -91.89131
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating67.5 US tons
Inventory rating40.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length312 ft (95.1 m)
Longest span128 ft (39 m)
Deck width46 ft (13.9 m)
Roadway width43 ft (13 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,255 (2024)
Projected traffic12,795 by 2044
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Mo 15 S over US 54 built?

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

What condition is Mo 15 S over US 54 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 Mo 15 S over US 54 carry?

About 8,255 vehicles per day (2024 count), of which roughly 13% are trucks.

How long is Mo 15 S over US 54?

The structure is 312 ft (95.1 m) long with a longest span of 128 ft (39 m) and a deck 46 ft wide.

Who owns Mo 15 S over US 54?

It is owned by the State Highway Agency.