US Bridges

KY-646 over N.Fk.Lulbegrub Creek

Fair

Montgomery County, Kentucky · 2.3 MI W of Ky 11 · Structure no. 087B00043N

Built
1975
50 years old
Condition
Fair
inspected July 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
68 ft
1 main span
Daily traffic
504
2022 count
Owner
State
State Highway Agency

About this bridge

KY-646 over N.Fk.Lulbegrub Creek is a prestressed concrete box beam or girders - multiple carrying KY-646 over N.Fk.Lulbegrub Creek in Montgomery County, Kentucky. It was built in 1975, so it is 50 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 5 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 504 vehicles a day, projected to reach 504 by 2042. The structure is 68 ft (20.6 m) long and 25 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesKY-646
CrossesN.Fk.Lulbegrub Creek
Location2.3 MI W of Ky 11
RouteState Highway 646
CountyMontgomery County
StateKentucky
Coordinates37.98889, -83.97667
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating77.3 US tons
Inventory rating46.4 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length68 ft (20.6 m)
Longest span65 ft (19.8 m)
Deck width25 ft (7.5 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic504 (2022)
Projected traffic504 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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-646 over N.Fk.Lulbegrub Creek built?

It was built in 1975, making it 50 years old in 2025.

What condition is KY-646 over N.Fk.Lulbegrub Creek 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 July 2023.

How much traffic does KY-646 over N.Fk.Lulbegrub Creek carry?

About 504 vehicles per day (2022 count).

How long is KY-646 over N.Fk.Lulbegrub Creek?

The structure is 68 ft (20.6 m) long with a longest span of 65 ft (19.8 m) and a deck 25 ft wide.

Who owns KY-646 over N.Fk.Lulbegrub Creek?

It is owned by the State Highway Agency.