US Bridges

Colburn RD over Small CR

FairPosted for load

Jackson County, Missouri · S 28 T 48 N R 30 W · Structure no. 20294

Built
1987
38 years old
Condition
Fair
inspected February 2023
Type
Tee Beam
Prestressed Concrete
Length
91 ft
2 main spans
Daily traffic
3,590
2024 count
Owner
County
County Highway Agency

About this bridge

Colburn RD over Small CR is a prestressed concrete tee beam carrying Colburn RD over Small CR in Jackson County, Missouri. It was built in 1987, so it is 38 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. Its operating status is: posted for load restriction.

It carries about 3,590 vehicles a day, roughly 20% of them trucks, projected to reach 4,667 by 2044. The structure is 91 ft (27.7 m) long and 40 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesColburn RD
CrossesSmall CR
LocationS 28 T 48 N R 30 W
RouteCounty Highway 254
CountyJackson County
StateMissouri
Coordinates38.94271, -94.23332
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusPosted for load 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadOther
Structure length91 ft (27.7 m)
Longest span44 ft (13.4 m)
Deck width40 ft (12.2 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,590 (2024)
Projected traffic4,667 by 2044
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Colburn RD over Small CR built?

It was built in 1987, making it 38 years old in 2025.

What condition is Colburn RD over Small 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 February 2023.

How much traffic does Colburn RD over Small CR carry?

About 3,590 vehicles per day (2024 count), of which roughly 20% are trucks.

How long is Colburn RD over Small CR?

The structure is 91 ft (27.7 m) long with a longest span of 44 ft (13.4 m) and a deck 40 ft wide.

Who owns Colburn RD over Small CR?

It is owned by the County Highway Agency.