US Bridges

KY-720 over Nolin River

Good

Grayson County, Kentucky · On Hardin-Grayson CO LN · Structure no. 043B00090N

Built
1988
37 years old
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
227 ft
3 main spans
Daily traffic
262
2021 count
Owner
State
State Highway Agency

About this bridge

KY-720 over Nolin River is a prestressed concrete stringer/multi-beam or girder carrying KY-720 over Nolin River in Grayson County, Kentucky. It was built in 1988, so it is 37 years old, younger 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 262 vehicles a day, projected to reach 262 by 2041. The structure is 227 ft (69.3 m) long and 25 ft wide. If it were closed, the detour would be 18 mi (29 km).

Location

Open in Google Maps
CarriesKY-720
CrossesNolin River
LocationOn Hardin-Grayson CO LN
RouteState Highway 720
CountyGrayson County
StateKentucky
Coordinates37.47444, -86.055
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating102 US tons
Inventory rating61.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length227 ft (69.3 m)
Longest span94 ft (28.7 m)
Deck width25 ft (7.7 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic262 (2021)
Projected traffic262 by 2041
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 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-720 over Nolin River built?

It was built in 1988, making it 37 years old in 2025.

What condition is KY-720 over Nolin River 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 October 2024.

How much traffic does KY-720 over Nolin River carry?

About 262 vehicles per day (2021 count).

How long is KY-720 over Nolin River?

The structure is 227 ft (69.3 m) long with a longest span of 94 ft (28.7 m) and a deck 25 ft wide.

Who owns KY-720 over Nolin River?

It is owned by the State Highway Agency.