US Bridges

KY-550 over Jones Fork

FairPosted for load

Knott County, Kentucky · 2.3 MI S of JCT Ky 1087 · Structure no. 060B00006N

Built
1933
92 years old
Condition
Fair
inspected June 2024
Type
Tee Beam
Concrete
Length
43 ft
1 main span
Daily traffic
961
2021 count
Owner
State
State Highway Agency

About this bridge

KY-550 over Jones Fork is a concrete tee beam carrying KY-550 over Jones Fork in Knott County, Kentucky. It was built in 1933, so it is 92 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 961 vehicles a day, roughly 8% of them trucks, projected to reach 961 by 2041. The structure is 43 ft (13.1 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesKY-550
CrossesJones Fork
Location2.3 MI S of JCT Ky 1087
RouteState Highway 550
CountyKnott County
StateKentucky
Coordinates37.38972, -82.88083
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionJune 2024
Inspection intervalevery 12 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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.7 US tons
Inventory rating24.4 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length43 ft (13.1 m)
Longest span40 ft (12.2 m)
Deck width24 ft (7.3 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic961 (2021)
Projected traffic961 by 2041
Trucks8%
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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$105,000
NavigationNo navigation control on waterway

Frequently asked questions

When was KY-550 over Jones Fork built?

It was built in 1933, making it 92 years old in 2025.

What condition is KY-550 over Jones Fork 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 2024.

How much traffic does KY-550 over Jones Fork carry?

About 961 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is KY-550 over Jones Fork?

The structure is 43 ft (13.1 m) long with a longest span of 40 ft (12.2 m) and a deck 24 ft wide.

Who owns KY-550 over Jones Fork?

It is owned by the State Highway Agency.