US Bridges

Mo 21 S over N Fk Lit Black CR

Fair

Carter County, Missouri · S 27 T 26 N R 2 E · Structure no. 5435

Built
1931
94 years old
Condition
Fair
inspected December 2023
Type
Culvert
Concrete Continuous
Length
30 ft
2 main spans
Daily traffic
1,222
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 21 S over N Fk Lit Black CR is a concrete continuous culvert carrying Mo 21 S over N Fk Lit Black CR in Carter County, Missouri. It was built in 1931, so it is 94 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 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 1,222 vehicles a day, roughly 24% of them trucks, projected to reach 1,833 by 2044. The structure is 30 ft (9 m) long and 31 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesMo 21 S
CrossesN Fk Lit Black CR
LocationS 27 T 26 N R 2 E
RouteState Highway 21
CountyCarter County
StateMissouri
Coordinates36.8758, -90.83451
Functional classRural Minor Arterial

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.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating78.4 US tons
Inventory rating46.6 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 15
Structure length30 ft (9 m)
Longest span10 ft (3 m)
Deck width31 ft (9.3 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,222 (2024)
Projected traffic1,833 by 2044
Trucks24%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 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 Mo 21 S over N Fk Lit Black CR built?

It was built in 1931, making it 94 years old in 2025.

What condition is Mo 21 S over N Fk Lit Black 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 2023.

How much traffic does Mo 21 S over N Fk Lit Black CR carry?

About 1,222 vehicles per day (2024 count), of which roughly 24% are trucks.

How long is Mo 21 S over N Fk Lit Black CR?

The structure is 30 ft (9 m) long with a longest span of 10 ft (3 m) and a deck 31 ft wide.

Who owns Mo 21 S over N Fk Lit Black CR?

It is owned by the State Highway Agency.