US Bridges

US 421 over Trib to Town Branch

Good

Trimble County, Kentucky · 0.75 MI S of US 42 · Structure no. 112B00025N

Built
1984
41 years old
Condition
Good
inspected October 2021
Type
Culvert
Concrete
Length
25 ft
2 main spans
Daily traffic
2,170
2021 count
Owner
State
State Highway Agency

About this bridge

US 421 over Trib to Town Branch is a concrete culvert carrying US 421 over Trib to Town Branch in Trimble County, Kentucky. It was built in 1984, so it is 41 years old, younger than the Kentucky average of 46.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,170 vehicles a day, roughly 13% of them trucks, projected to reach 2,170 by 2041. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesUS 421
CrossesTrib to Town Branch
Location0.75 MI S of US 42
RouteU.S. Route 421
CountyTrimble County
StateKentucky
Coordinates38.585, -85.30861
Functional classRural 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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionOctober 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating60 US tons
Inventory rating44 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length25 ft (7.6 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,170 (2021)
Projected traffic2,170 by 2041
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 US 421 over Trib to Town Branch built?

It was built in 1984, making it 41 years old in 2025.

What condition is US 421 over Trib to Town Branch 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 October 2021.

How much traffic does US 421 over Trib to Town Branch carry?

About 2,170 vehicles per day (2021 count), of which roughly 13% are trucks.

How long is US 421 over Trib to Town Branch?

The structure is 25 ft (7.6 m) long with a longest span of 12 ft (3.7 m).

Who owns US 421 over Trib to Town Branch?

It is owned by the State Highway Agency.