US Bridges

KY-121 over Mayfield Creek

FairPosted for load

Ballard County, Kentucky · .20 MI Nor. of Carlisle C · Structure no. 004B00028N

Built
1942
83 years old
Condition
Fair
inspected November 2023
Type
Tee Beam
Concrete
Length
693 ft
21 main spans
Daily traffic
1,508
2019 count
Owner
State
State Highway Agency

About this bridge

KY-121 over Mayfield Creek is a concrete tee beam carrying KY-121 over Mayfield Creek in Ballard County, Kentucky. It was built in 1942, so it is 83 years old, older than the Kentucky average of 46.6 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 1,508 vehicles a day, roughly 25% of them trucks, projected to reach 1,508 by 2039. The structure is 693 ft (211.2 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

No coordinates are recorded for this structure.

CarriesKY-121
CrossesMayfield Creek
Location.20 MI Nor. of Carlisle C
RouteState Highway 121
CountyBallard County
StateKentucky
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 48 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.1 US tons
Inventory rating37.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans21
Design loadH 15
Structure length693 ft (211.2 m)
Longest span30 ft (9.1 m)
Deck width28 ft (8.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,508 (2019)
Projected traffic1,508 by 2039
Trucks25%
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 statusPossibly eligible for the National Register; requires further investigation
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$2.4 million
NavigationNo navigation control on waterway

Frequently asked questions

When was KY-121 over Mayfield Creek built?

It was built in 1942, making it 83 years old in 2025.

What condition is KY-121 over Mayfield Creek 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 November 2023.

How much traffic does KY-121 over Mayfield Creek carry?

About 1,508 vehicles per day (2019 count), of which roughly 25% are trucks.

How long is KY-121 over Mayfield Creek?

The structure is 693 ft (211.2 m) long with a longest span of 30 ft (9.1 m) and a deck 28 ft wide.

Who owns KY-121 over Mayfield Creek?

It is owned by the State Highway Agency.