US Bridges

County RD 609 over Br of Johns Creek

Fair

Audrain County, Missouri · S 24 T 51 N R 7 W · Structure no. 33571

Built
1986
39 years old
Condition
Fair
inspected May 2023
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
75
2023 count
Owner
County
County Highway Agency

About this bridge

County RD 609 over Br of Johns Creek is a concrete culvert carrying County RD 609 over Br of Johns Creek in Audrain County, Missouri. It was built in 1986, so it is 39 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 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 75 vehicles a day, roughly 10% of them trucks, projected to reach 94 by 2043. The structure is 22 ft (6.6 m) long and 49 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesCounty RD 609
CrossesBr of Johns Creek
LocationS 24 T 51 N R 7 W
RouteCounty Highway 599
CountyAudrain County
StateMissouri
Coordinates39.18261, -91.62806
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length22 ft (6.6 m)
Longest span10 ft (3 m)
Deck width49 ft (14.9 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2023)
Projected traffic94 by 2043
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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 609 over Br of Johns Creek built?

It was built in 1986, making it 39 years old in 2025.

What condition is County RD 609 over Br of Johns Creek 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 May 2023.

How much traffic does County RD 609 over Br of Johns Creek carry?

About 75 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is County RD 609 over Br of Johns Creek?

The structure is 22 ft (6.6 m) long with a longest span of 10 ft (3 m) and a deck 49 ft wide.

Who owns County RD 609 over Br of Johns Creek?

It is owned by the County Highway Agency.