US Bridges

Ky. 646 over Spencer Creek

Good

Montgomery County, Kentucky · 150 Ft S of JCT Ky 713 · Structure no. 087B00065N

Built
2005
20 years old
Condition
Good
inspected July 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
38 ft
1 main span
Daily traffic
342
2021 count
Owner
State
State Highway Agency

About this bridge

Ky. 646 over Spencer Creek is a prestressed concrete box beam or girders - single or spread carrying Ky. 646 over Spencer Creek in Montgomery County, Kentucky. It was built in 2005, so it is 20 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 342 vehicles a day, projected to reach 342 by 2041. The structure is 38 ft (11.6 m) long and 30 ft wide. If it were closed, the detour would be 4.3 mi (7 km).

Location

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CarriesKy. 646
CrossesSpencer Creek
Location150 Ft S of JCT Ky 713
RouteState Highway 646
CountyMontgomery County
StateKentucky
Coordinates38.04056, -83.89417
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
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 evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating90.7 US tons
Inventory rating54.5 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length38 ft (11.6 m)
Longest span35 ft (10.7 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic342 (2021)
Projected traffic342 by 2041
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed4.3 mi (7 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 Spencer Creek built?

It was built in 2005, making it 20 years old in 2025.

What condition is Ky. 646 over Spencer 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 July 2023.

How much traffic does Ky. 646 over Spencer Creek carry?

About 342 vehicles per day (2021 count).

How long is Ky. 646 over Spencer Creek?

The structure is 38 ft (11.6 m) long with a longest span of 35 ft (10.7 m) and a deck 30 ft wide.

Who owns Ky. 646 over Spencer Creek?

It is owned by the State Highway Agency.