US Bridges

County RD 321 over Barren Fk

Fair

Oregon County, Missouri · S 19 T 24 N R 5 W · Structure no. 16128

Built
1950
75 years old
Condition
Fair
inspected January 2024
Type
Slab
Concrete
Length
24 ft
2 main spans
Daily traffic
15
2024 count
Owner
County
County Highway Agency

About this bridge

County RD 321 over Barren Fk is a concrete slab carrying County RD 321 over Barren Fk in Oregon County, Missouri. It was built in 1950, so it is 75 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 15 vehicles a day, roughly 10% of them trucks, projected to reach 18 by 2044. The structure is 24 ft (7.3 m) long and 20 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesCounty RD 321
CrossesBarren Fk
LocationS 19 T 24 N R 5 W
RouteCounty Highway 111
CountyOregon County
StateMissouri
Coordinates36.7218, -91.5455
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating54.6 US tons
Inventory rating17.9 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadOther
Structure length24 ft (7.3 m)
Longest span10 ft (3 m)
Deck width20 ft (6.1 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2024)
Projected traffic18 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 321 over Barren Fk built?

It was built in 1950, making it 75 years old in 2025.

What condition is County RD 321 over Barren Fk 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 January 2024.

How much traffic does County RD 321 over Barren Fk carry?

About 15 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is County RD 321 over Barren Fk?

The structure is 24 ft (7.3 m) long with a longest span of 10 ft (3 m) and a deck 20 ft wide.

Who owns County RD 321 over Barren Fk?

It is owned by the County Highway Agency.