US Bridges

County RD 307 over Branch

Fair

Marion County, Missouri · S 4 T 59 N R 6 W · Structure no. 14303

Built
1990
35 years old
Condition
Fair
inspected February 2023
Type
Culvert
Concrete
Length
28 ft
2 main spans
Daily traffic
40
2023 count
Owner
County
County Highway Agency

About this bridge

County RD 307 over Branch is a concrete culvert carrying County RD 307 over Branch in Marion County, Missouri. It was built in 1990, so it is 35 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 40 vehicles a day, roughly 10% of them trucks, projected to reach 50 by 2043. The structure is 28 ft (8.5 m) long and 31 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

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CarriesCounty RD 307
CrossesBranch
LocationS 4 T 59 N R 6 W
RouteCounty Highway 63
CountyMarion County
StateMissouri
Coordinates39.94308, -91.57289
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 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 geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length28 ft (8.5 m)
Longest span13 ft (4 m)
Deck width31 ft (9.5 m)
Roadway width29 ft (8.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2023)
Projected traffic50 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 307 over Branch built?

It was built in 1990, making it 35 years old in 2025.

What condition is County RD 307 over Branch 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 February 2023.

How much traffic does County RD 307 over Branch carry?

About 40 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is County RD 307 over Branch?

The structure is 28 ft (8.5 m) long with a longest span of 13 ft (4 m) and a deck 31 ft wide.

Who owns County RD 307 over Branch?

It is owned by the County Highway Agency.