US Bridges

KY-3630 over S.Fk.Rockcastle Rvr

Fair

Laurel County, Kentucky · Near Jackson - Laurel Cl · Structure no. 063B00009N

Built
1940
85 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
189 ft
3 main spans
Daily traffic
611
2022 count
Owner
State
State Highway Agency

About this bridge

KY-3630 over S.Fk.Rockcastle Rvr is a steel continuous stringer/multi-beam or girder carrying KY-3630 over S.Fk.Rockcastle Rvr in Laurel 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 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 611 vehicles a day, roughly 7% of them trucks, projected to reach 611 by 2042. The structure is 189 ft (57.6 m) long and 28 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesKY-3630
CrossesS.Fk.Rockcastle Rvr
LocationNear Jackson - Laurel Cl
RouteState Highway 3630
CountyLaurel County
StateKentucky
Coordinates37.25694, -84.03389
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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 rating66.5 US tons
Inventory rating39.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length189 ft (57.6 m)
Longest span80 ft (24.4 m)
Deck width28 ft (8.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic611 (2022)
Projected traffic611 by 2042
Trucks7%
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-3630 over S.Fk.Rockcastle Rvr built?

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

What condition is KY-3630 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-3630 over S.Fk.Rockcastle Rvr carry?

About 611 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is KY-3630 over S.Fk.Rockcastle Rvr?

The structure is 189 ft (57.6 m) long with a longest span of 80 ft (24.4 m) and a deck 28 ft wide.

Who owns KY-3630 over S.Fk.Rockcastle Rvr?

It is owned by the State Highway Agency.