US Bridges

KY-578 over S.Fk.Rockcastle Rvr

FairPosted for load

Laurel County, Kentucky · .10 MI E of E-Jct Ky 638 · Structure no. 063B00020N

Built
1952
73 years old
Condition
Fair
inspected July 2024
Type
Tee Beam
Concrete
Length
132 ft
4 main spans
Daily traffic
152
2023 count
Owner
State
State Highway Agency

About this bridge

KY-578 over S.Fk.Rockcastle Rvr is a concrete tee beam carrying KY-578 over S.Fk.Rockcastle Rvr in Laurel County, Kentucky. It was built in 1952, so it is 73 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 152 vehicles a day, projected to reach 152 by 2043. The structure is 132 ft (40.2 m) long and 22 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesKY-578
CrossesS.Fk.Rockcastle Rvr
Location.10 MI E of E-Jct Ky 638
RouteState Highway 578
CountyLaurel County
StateKentucky
Coordinates37.23472, -83.99861
Functional classRural Minor 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.8 US tons
Inventory rating29.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length132 ft (40.2 m)
Longest span30 ft (9.1 m)
Deck width22 ft (6.8 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic152 (2023)
Projected traffic152 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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-578 over S.Fk.Rockcastle Rvr built?

It was built in 1952, making it 73 years old in 2025.

What condition is KY-578 over S.Fk.Rockcastle Rvr 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 July 2024.

How much traffic does KY-578 over S.Fk.Rockcastle Rvr carry?

About 152 vehicles per day (2023 count).

How long is KY-578 over S.Fk.Rockcastle Rvr?

The structure is 132 ft (40.2 m) long with a longest span of 30 ft (9.1 m) and a deck 22 ft wide.

Who owns KY-578 over S.Fk.Rockcastle Rvr?

It is owned by the State Highway Agency.