US Bridges

Rt Nn S over Kile CR

Fair

Boone County, Missouri · S 28 T 51 N R 13 W · Structure no. 8051

Built
1962
63 years old
Condition
Fair
inspected September 2023
Type
Culvert
Concrete Continuous
Length
28 ft
2 main spans
Daily traffic
247
2024 count
Owner
State
State Highway Agency

About this bridge

Rt Nn S over Kile CR is a concrete continuous culvert carrying Rt Nn S over Kile CR in Boone County, Missouri. It was built in 1962, so it is 63 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 247 vehicles a day, roughly 2% of them trucks, projected to reach 432 by 2044. The structure is 28 ft (8.5 m) long. If it were closed, the detour would be 18 mi (29 km).

Location

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CarriesRt Nn S
CrossesKile CR
LocationS 28 T 51 N R 13 W
RouteState Highway 0NN
CountyBoone County
StateMissouri
Coordinates39.18422, -92.37835
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 inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to 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 Continuous
DeckNot applicable
Main spans2
Design loadH 15
Structure length28 ft (8.5 m)
Longest span13 ft (4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic247 (2024)
Projected traffic432 by 2044
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 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 Kile CR built?

It was built in 1962, making it 63 years old in 2025.

What condition is Rt Nn S over Kile 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 September 2023.

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

About 247 vehicles per day (2024 count), of which roughly 2% are trucks.

How long is Rt Nn S over Kile CR?

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

Who owns Rt Nn S over Kile CR?

It is owned by the State Highway Agency.