US Bridges

KY-490 over CSX RR & Roundstone CR

Fair

Rockcastle County, Kentucky · 100 East of US 25 · Structure no. 102B00052N

Built
1983
42 years old
Condition
Fair
inspected September 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
437 ft
5 main spans
Daily traffic
257
2023 count
Owner
State
State Highway Agency

About this bridge

KY-490 over CSX RR & Roundstone CR is a prestressed concrete stringer/multi-beam or girder carrying KY-490 over CSX RR & Roundstone CR in Rockcastle County, Kentucky. It was built in 1983, so it is 42 years old, younger 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 257 vehicles a day, projected to reach 257 by 2043. The structure is 437 ft (133.2 m) long and 42 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesKY-490
CrossesCSX RR & Roundstone CR
Location100 East of US 25
RouteState Highway 490
CountyRockcastle County
StateKentucky
Coordinates37.29889, -84.21389
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating68.8 US tons
Inventory rating39.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length437 ft (133.2 m)
Longest span106 ft (32.3 m)
Deck width42 ft (12.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic257 (2023)
Projected traffic257 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad and waterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$2.3 million
NavigationNo navigation control on waterway

Frequently asked questions

When was KY-490 over CSX RR & Roundstone CR built?

It was built in 1983, making it 42 years old in 2025.

What condition is KY-490 over CSX RR & Roundstone CR 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 September 2022.

How much traffic does KY-490 over CSX RR & Roundstone CR carry?

About 257 vehicles per day (2023 count).

How long is KY-490 over CSX RR & Roundstone CR?

The structure is 437 ft (133.2 m) long with a longest span of 106 ft (32.3 m) and a deck 42 ft wide.

Who owns KY-490 over CSX RR & Roundstone CR?

It is owned by the State Highway Agency.