US Bridges

KY-70 over Unname Stream

Good

Caldwell County, Kentucky · 2.0 MI West of JCT Ky 293 · Structure no. 017B00046N

Built
1947
78 years old
Condition
Good
inspected January 2023
Type
Culvert
Concrete
Length
33 ft
3 main spans
Daily traffic
277
2023 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 1947, so it is 78 years old, older than the Kentucky average of 46.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 277 vehicles a day, projected to reach 277 by 2043. The structure is 33 ft (10.1 m) long and 27 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesKY-70
CrossesUnname Stream
Location2.0 MI West of JCT Ky 293
RouteState Highway 70
CountyCaldwell County
StateKentucky
Coordinates37.25528, -87.85528
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionJanuary 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating45 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadH 15
Structure length33 ft (10.1 m)
Longest span10 ft (3 m)
Deck width27 ft (8.3 m)
Roadway width25 ft (7.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic277 (2023)
Projected traffic277 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 1947, making it 78 years old in 2025.

What condition is KY-70 over Unname Stream in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2023.

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

About 277 vehicles per day (2023 count).

How long is KY-70 over Unname Stream?

The structure is 33 ft (10.1 m) long with a longest span of 10 ft (3 m) and a deck 27 ft wide.

Who owns KY-70 over Unname Stream?

It is owned by the State Highway Agency.