US Bridges

KY-70 over Unname Stream

Fair

Caldwell County, Kentucky · .05 MI Nor. of JCT Ky 293 · Structure no. 017B00049N

Built
1948
77 years old
Condition
Fair
inspected January 2023
Type
Culvert
Concrete
Length
24 ft
2 main spans
Daily traffic
761
2022 count
Owner
State
State Highway Agency

About this bridge

KY-70 over Unname Stream is a concrete culvert carrying KY-70 over Unname Stream in Caldwell County, Kentucky. It was built in 1948, so it is 77 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 761 vehicles a day, roughly 13% of them trucks, projected to reach 761 by 2042. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 16.2 mi (26 km).

Location

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CarriesKY-70
CrossesUnname Stream
Location.05 MI Nor. of JCT Ky 293
RouteState Highway 70
CountyCaldwell County
StateKentucky
Coordinates37.26472, -87.82
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating60 US tons
Inventory rating45 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadH 20
Structure length24 ft (7.3 m)
Longest span11 ft (3.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic761 (2022)
Projected traffic761 by 2042
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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-70 over Unname Stream built?

It was built in 1948, making it 77 years old in 2025.

What condition is KY-70 over Unname Stream 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 January 2023.

How much traffic does KY-70 over Unname Stream carry?

About 761 vehicles per day (2022 count), of which roughly 13% are trucks.

How long is KY-70 over Unname Stream?

The structure is 24 ft (7.3 m) long with a longest span of 11 ft (3.4 m).

Who owns KY-70 over Unname Stream?

It is owned by the State Highway Agency.