US Bridges

184th Trl over Flat CR

FairPosted for load

Saline County, Missouri · S 5 T 49 N R 19 W · Structure no. 22124

Built
1910
115 years old, rebuilt 1999
Condition
Fair
inspected March 2024
Type
Girder and Floorbeam System
Steel
Length
37 ft
1 main span
Daily traffic
35
2024 count
Owner
County
County Highway Agency

About this bridge

184th Trl over Flat CR is a steel girder and floorbeam system carrying 184th Trl over Flat CR in Saline County, Missouri. It was built in 1910 and reconstructed in 1999, so it is 115 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. Its operating status is: posted for load restriction.

It carries about 35 vehicles a day, roughly 10% of them trucks, projected to reach 39 by 2044. The structure is 37 ft (11.3 m) long and 16 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
Carries184th Trl
CrossesFlat CR
LocationS 5 T 49 N R 19 W
RouteCounty Highway 341
CountySaline County
StateMissouri
Coordinates39.04907, -93.02834
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
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating14.9 US tons
Inventory rating8.9 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length37 ft (11.3 m)
Longest span32 ft (9.8 m)
Deck width16 ft (4.9 m)
Roadway width16 ft (4.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35 (2024)
Projected traffic39 by 2044
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$327,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 184th Trl over Flat CR built?

It was built in 1910, making it 115 years old in 2025. It was reconstructed in 1999.

What condition is 184th Trl over Flat 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 March 2024.

How much traffic does 184th Trl over Flat CR carry?

About 35 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is 184th Trl over Flat CR?

The structure is 37 ft (11.3 m) long with a longest span of 32 ft (9.8 m) and a deck 16 ft wide.

Who owns 184th Trl over Flat CR?

It is owned by the County Highway Agency.