US Bridges

US-31E over Slough

FairPosted for load

Nelson County, Kentucky · .20 MI N.E. of Larue Cl · Structure no. 090B00050N

Built
1940
85 years old
Condition
Fair
inspected February 2024
Type
Tee Beam
Concrete
Length
226 ft
7 main spans
Daily traffic
2,671
2023 count
Owner
State
State Highway Agency

About this bridge

US-31E over Slough is a concrete tee beam carrying US-31E over Slough in Nelson County, Kentucky. It was built in 1940, so it is 85 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 5 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 2,671 vehicles a day, roughly 12% of them trucks, projected to reach 2,671 by 2043. The structure is 226 ft (69 m) long and 31 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesUS-31E
CrossesSlough
Location.20 MI N.E. of Larue Cl
RouteU.S. Route 31
CountyNelson County
StateKentucky
Coordinates37.65278, -85.59389
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating53.9 US tons
Inventory rating32.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans7
Design loadH 15
Structure length226 ft (69 m)
Longest span33 ft (10.1 m)
Deck width31 ft (9.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,671 (2023)
Projected traffic2,671 by 2043
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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$837,000
NavigationNo navigation control on waterway

Frequently asked questions

When was US-31E over Slough built?

It was built in 1940, making it 85 years old in 2025.

What condition is US-31E over Slough 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 February 2024.

How much traffic does US-31E over Slough carry?

About 2,671 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is US-31E over Slough?

The structure is 226 ft (69 m) long with a longest span of 33 ft (10.1 m) and a deck 31 ft wide.

Who owns US-31E over Slough?

It is owned by the State Highway Agency.