US Bridges

US-421 over Cowbell Creek

Good

Madison County, Kentucky · 50 Ft N of JCT Ky 21 · Structure no. 076B00121N

Built
2019
6 years old
Condition
Good
inspected April 2024
Type
Culvert
Concrete
Length
24 ft
1 main span
Daily traffic
3,347
2022 count
Owner
State
State Highway Agency

About this bridge

US-421 over Cowbell Creek is a concrete culvert carrying US-421 over Cowbell Creek in Madison County, Kentucky. It was built in 2019, so it is 6 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,347 vehicles a day, roughly 8% of them trucks, projected to reach 3,347 by 2042. The structure is 24 ft (7.3 m) long and 40 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesUS-421
CrossesCowbell Creek
Location50 Ft N of JCT Ky 21
RouteU.S. Route 421
CountyMadison County
StateKentucky
Coordinates37.555, -84.20861
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 protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable 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 rating102.8 US tons
Inventory rating79.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadGreater than HL 93
Structure length24 ft (7.3 m)
Longest span24 ft (7.3 m)
Deck width40 ft (12.2 m)
Roadway width38 ft (11.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,347 (2022)
Projected traffic3,347 by 2042
Trucks8%
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 Cowbell Creek built?

It was built in 2019, making it 6 years old in 2025.

What condition is US-421 over Cowbell Creek 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 April 2024.

How much traffic does US-421 over Cowbell Creek carry?

About 3,347 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is US-421 over Cowbell Creek?

The structure is 24 ft (7.3 m) long with a longest span of 24 ft (7.3 m) and a deck 40 ft wide.

Who owns US-421 over Cowbell Creek?

It is owned by the State Highway Agency.