US Bridges

KY-9 over Flagg Spring Creek

Good

Campbell County, Kentucky · @ JCT Ky 735 · Structure no. 019B00066N

Built
1990
35 years old
Condition
Good
inspected August 2021
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
93 ft
1 main span
Daily traffic
9,077
2022 count
Owner
State
State Highway Agency

About this bridge

KY-9 over Flagg Spring Creek is a prestressed concrete stringer/multi-beam or girder carrying KY-9 over Flagg Spring Creek in Campbell County, Kentucky. It was built in 1990, so it is 35 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 9,077 vehicles a day, roughly 15% of them trucks, projected to reach 9,077 by 2042. The structure is 93 ft (28.3 m) long and 85 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesKY-9
CrossesFlagg Spring Creek
Location@ JCT Ky 735
RouteState Highway 9
CountyCampbell County
StateKentucky
Coordinates38.88639, -84.26444
Functional classRural Principal Arterial - Other

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.3 US tons
Inventory rating43.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length93 ft (28.3 m)
Longest span89 ft (27.2 m)
Deck width85 ft (26 m)
Roadway width82 ft (25 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,077 (2022)
Projected traffic9,077 by 2042
Trucks15%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

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-9 over Flagg Spring Creek built?

It was built in 1990, making it 35 years old in 2025.

What condition is KY-9 over Flagg Spring Creek 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 August 2021.

How much traffic does KY-9 over Flagg Spring Creek carry?

About 9,077 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is KY-9 over Flagg Spring Creek?

The structure is 93 ft (28.3 m) long with a longest span of 89 ft (27.2 m) and a deck 85 ft wide.

Who owns KY-9 over Flagg Spring Creek?

It is owned by the State Highway Agency.