US Bridges

KY-770 over Laurel River

Fair

Laurel County, Kentucky · .30 MI West of I75 Ntrch · Structure no. 063B00096N

Built
1976
49 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
565 ft
3 main spans
Daily traffic
9,086
2023 count
Owner
State
State Highway Agency

About this bridge

KY-770 over Laurel River is a steel continuous stringer/multi-beam or girder carrying KY-770 over Laurel River in Laurel County, Kentucky. It was built in 1976, so it is 49 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 9,086 vehicles a day, projected to reach 9,086 by 2043. The structure is 565 ft (172.3 m) long and 34 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesKY-770
CrossesLaurel River
Location.30 MI West of I75 Ntrch
RouteState Highway 770
CountyLaurel County
StateKentucky
Coordinates36.97444, -84.12139
Functional classUrban Minor Arterial

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating80.4 US tons
Inventory rating48.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length565 ft (172.3 m)
Longest span240 ft (73.2 m)
Deck width34 ft (10.3 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,086 (2023)
Projected traffic9,086 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was KY-770 over Laurel River built?

It was built in 1976, making it 49 years old in 2025.

What condition is KY-770 over Laurel River 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-770 over Laurel River carry?

About 9,086 vehicles per day (2023 count).

How long is KY-770 over Laurel River?

The structure is 565 ft (172.3 m) long with a longest span of 240 ft (73.2 m) and a deck 34 ft wide.

Who owns KY-770 over Laurel River?

It is owned by the State Highway Agency.