US Bridges

County RD 308 over Long Br

Fair

Andrew County, Missouri · S 32 T 59 N R 34 W · Structure no. 21482

Built
1920
105 years old, rebuilt 1987
Condition
Fair
inspected December 2023
Type
Culvert
Concrete
Length
26 ft
2 main spans
Daily traffic
15
2024 count
Owner
County
County Highway Agency

About this bridge

County RD 308 over Long Br is a concrete culvert carrying County RD 308 over Long Br in Andrew County, Missouri. It was built in 1920 and reconstructed in 1987, so it is 105 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 15 vehicles a day, roughly 10% of them trucks, projected to reach 17 by 2044. The structure is 26 ft (7.9 m) long. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesCounty RD 308
CrossesLong Br
LocationS 32 T 59 N R 34 W
RouteCounty Highway 308
CountyAndrew County
StateMissouri
Coordinates39.8862, -94.73901
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.
Culvert6 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
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.6 US tons
Inventory rating17.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadH 15
Structure length26 ft (7.9 m)
Longest span9 ft (2.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2024)
Projected traffic17 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 308 over Long Br built?

It was built in 1920, making it 105 years old in 2025. It was reconstructed in 1987.

What condition is County RD 308 over Long Br 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 308 over Long Br carry?

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

How long is County RD 308 over Long Br?

The structure is 26 ft (7.9 m) long with a longest span of 9 ft (2.7 m).

Who owns County RD 308 over Long Br?

It is owned by the County Highway Agency.