US Bridges

US-421 over Simms Branch

Fair

Leslie County, Kentucky · .50 MI SE of JCT Ky 2058 · Structure no. 066B00011N

Built
1944
81 years old
Condition
Fair
inspected December 2023
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
1,107
2022 count
Owner
State
State Highway Agency

About this bridge

US-421 over Simms Branch is a concrete culvert carrying US-421 over Simms Branch in Leslie County, Kentucky. It was built in 1944, so it is 81 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 1,107 vehicles a day, roughly 16% of them trucks, projected to reach 1,107 by 2042. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 72.1 mi (116 km).

CarriesUS-421
CrossesSimms Branch
Location.50 MI SE of JCT Ky 2058
RouteU.S. Route 421
Coordinates36.955, -83.39056
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 loadH 15
Structure length22 ft (6.7 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,107 (2022)
Projected traffic1,107 by 2042
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed72.1 mi (116 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 US-421 over Simms Branch built?

It was built in 1944, making it 81 years old in 2025.

What condition is US-421 over Simms 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 December 2023.

How much traffic does US-421 over Simms Branch carry?

About 1,107 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is US-421 over Simms Branch?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m).

Who owns US-421 over Simms Branch?

It is owned by the State Highway Agency.