US Bridges

KY-3439 over Shy Mug Branch

Fair

Knox County, Kentucky · .1 MI W-Ky 1304 @yeager · Structure no. 061B00087N

Built
1960
65 years old
Condition
Fair
inspected October 2024
Type
Culvert
Concrete
Length
25 ft
2 main spans
Daily traffic
2,121
2022 count
Owner
State
State Highway Agency

About this bridge

KY-3439 over Shy Mug Branch is a concrete culvert carrying KY-3439 over Shy Mug Branch in Knox County, Kentucky. It was built in 1960, so it is 65 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.

It carries about 2,121 vehicles a day, projected to reach 2,121 by 2042. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesKY-3439
CrossesShy Mug Branch
Location.1 MI W-Ky 1304 @yeager
RouteState Highway 3439
CountyKnox County
StateKentucky
Coordinates36.87333, -83.83333
Functional classUrban Local

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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating60 US tons
Inventory rating44 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length25 ft (7.6 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 traffic2,121 (2022)
Projected traffic2,121 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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-3439 over Shy Mug Branch built?

It was built in 1960, making it 65 years old in 2025.

What condition is KY-3439 over Shy Mug 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 October 2024.

How much traffic does KY-3439 over Shy Mug Branch carry?

About 2,121 vehicles per day (2022 count).

How long is KY-3439 over Shy Mug Branch?

The structure is 25 ft (7.6 m) long with a longest span of 10 ft (3 m).

Who owns KY-3439 over Shy Mug Branch?

It is owned by the State Highway Agency.