US Bridges

Rt Nn S over Crider CR

Fair

Osage County, Missouri · S 2 T 41 N R 7 W · Structure no. 6746

Built
1956
69 years old
Condition
Fair
inspected December 2024
Type
Culvert
Concrete Continuous
Length
27 ft
2 main spans
Daily traffic
243
2024 count
Owner
State
State Highway Agency

About this bridge

Rt Nn S over Crider CR is a concrete continuous culvert carrying Rt Nn S over Crider CR in Osage County, Missouri. It was built in 1956, so it is 69 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 243 vehicles a day, roughly 29% of them trucks, projected to reach 352 by 2044. The structure is 27 ft (8.2 m) long and 28 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesRt Nn S
CrossesCrider CR
LocationS 2 T 41 N R 7 W
RouteState Highway 0NN
Coordinates38.32491, -91.67753
Functional classRural Minor Collector

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 inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating41.7 US tons
Inventory rating24.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 10
Structure length27 ft (8.2 m)
Longest span10 ft (3 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic243 (2024)
Projected traffic352 by 2044
Trucks29%
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

OwnerState Highway Agency
Maintained byState 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 Rt Nn S over Crider CR built?

It was built in 1956, making it 69 years old in 2025.

What condition is Rt Nn S over Crider 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 2024.

How much traffic does Rt Nn S over Crider CR carry?

About 243 vehicles per day (2024 count), of which roughly 29% are trucks.

How long is Rt Nn S over Crider CR?

The structure is 27 ft (8.2 m) long with a longest span of 10 ft (3 m) and a deck 28 ft wide.

Who owns Rt Nn S over Crider CR?

It is owned by the State Highway Agency.