US Bridges

KY-121 over Nanney Branch

Fair

Calloway County, Kentucky · .80 MI East of JCT Ky 783 · Structure no. 018B00036N

Built
1937
88 years old
Condition
Fair
inspected June 2023
Type
Culvert
Concrete
Length
37 ft
3 main spans
Daily traffic
6,578
2023 count
Owner
State
State Highway Agency

About this bridge

KY-121 over Nanney Branch is a concrete culvert carrying KY-121 over Nanney Branch in Calloway County, Kentucky. It was built in 1937, so it is 88 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.

It carries about 6,578 vehicles a day, roughly 7% of them trucks, projected to reach 6,578 by 2043. The structure is 37 ft (11.3 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesKY-121
CrossesNanney Branch
Location.80 MI East of JCT Ky 783
RouteState Highway 121
CountyCalloway County
StateKentucky
Coordinates36.62583, -88.34583
Functional classUrban 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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating44 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadUnknown
Structure length37 ft (11.3 m)
Longest span11 ft (3.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,578 (2023)
Projected traffic6,578 by 2043
Trucks7%
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

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was KY-121 over Nanney Branch built?

It was built in 1937, making it 88 years old in 2025.

What condition is KY-121 over Nanney Branch 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 June 2023.

How much traffic does KY-121 over Nanney Branch carry?

About 6,578 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is KY-121 over Nanney Branch?

The structure is 37 ft (11.3 m) long with a longest span of 11 ft (3.5 m).

Who owns KY-121 over Nanney Branch?

It is owned by the State Highway Agency.