US Bridges

Colbern Road over Trib to Unity Lake

Good

Jackson County, Missouri · S 30 T 48 N R 31 W · Structure no. 37096

Built
2023
2 years old
Condition
Good
inspected December 2023
Type
Culvert
Concrete
Length
34 ft
3 main spans
Daily traffic
9,498
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Colbern Road over Trib to Unity Lake is a concrete culvert carrying Colbern Road over Trib to Unity Lake in Jackson County, Missouri. It was built in 2023, so it is 2 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. Its operating status is: new structure not yet open to traffic.

It carries about 9,498 vehicles a day, roughly 15% of them trucks, projected to reach 12,347 by 2044. The structure is 34 ft (10.4 m) long and 151 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesColbern Road
CrossesTrib to Unity Lake
LocationS 30 T 48 N R 31 W
RouteCity Street 0
CountyJackson County
StateMissouri
Coordinates38.94565, -94.38778
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection9 ExcellentNo problems noted.
Culvert9 ExcellentNo problems noted.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusNew structure not yet open to traffic
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating95.2 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length34 ft (10.4 m)
Longest span11 ft (3.4 m)
Deck width151 ft (45.9 m)
Roadway width135 ft (41.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,498 (2024)
Projected traffic12,347 by 2044
Trucks15%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Colbern Road over Trib to Unity Lake built?

It was built in 2023, making it 2 years old in 2025.

What condition is Colbern Road over Trib to Unity Lake in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2023.

How much traffic does Colbern Road over Trib to Unity Lake carry?

About 9,498 vehicles per day (2024 count), of which roughly 15% are trucks.

How long is Colbern Road over Trib to Unity Lake?

The structure is 34 ft (10.4 m) long with a longest span of 11 ft (3.4 m) and a deck 151 ft wide.

Who owns Colbern Road over Trib to Unity Lake?

It is owned by the City or Municipal Highway Agency.