US Bridges

County RD SW 50 over Yellow CR

Fair

St. Clair County, Missouri · S 33 T 38 N R 26 W · Structure no. 20186

Built
1977
48 years old
Condition
Fair
inspected December 2023
Type
Slab
Concrete
Length
137 ft
3 main spans
Daily traffic
10
2023 count
Owner
County
County Highway Agency

About this bridge

County RD SW 50 over Yellow CR is a concrete slab carrying County RD SW 50 over Yellow CR in St. Clair County, Missouri. It was built in 1977, so it is 48 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 10 vehicles a day, roughly 10% of them trucks, projected to reach 12 by 2043. The structure is 137 ft (41.8 m) long and 27 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesCounty RD SW 50
CrossesYellow CR
LocationS 33 T 38 N R 26 W
RouteCounty Highway 250
CountySt. Clair County
StateMissouri
Coordinates38.01595, -93.79801
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 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 adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.6 US tons
Inventory rating17.9 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 10
Structure length137 ft (41.8 m)
Longest span54 ft (16.5 m)
Deck width27 ft (8.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2023)
Projected traffic12 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD SW 50 over Yellow CR built?

It was built in 1977, making it 48 years old in 2025.

What condition is County RD SW 50 over Yellow 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 December 2023.

How much traffic does County RD SW 50 over Yellow CR carry?

About 10 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is County RD SW 50 over Yellow CR?

The structure is 137 ft (41.8 m) long with a longest span of 54 ft (16.5 m) and a deck 27 ft wide.

Who owns County RD SW 50 over Yellow CR?

It is owned by the County Highway Agency.