US Bridges

KY-2921 over Twelvemile Creek

FairPosted for load

Campbell County, Kentucky · 100 SE of JCT Ky 1566 · Structure no. 019B00062N

Built
1970
55 years old
Condition
Fair
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
109 ft
2 main spans
Daily traffic
225
2021 count
Owner
State
State Highway Agency

About this bridge

KY-2921 over Twelvemile Creek is a prestressed concrete box beam or girders - multiple carrying KY-2921 over Twelvemile Creek in Campbell County, Kentucky. It was built in 1970, so it is 55 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. Its operating status is: posted for load restriction.

It carries about 225 vehicles a day, projected to reach 225 by 2041. The structure is 109 ft (33.2 m) long and 18 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesKY-2921
CrossesTwelvemile Creek
Location100 SE of JCT Ky 1566
RouteState Highway 2921
CountyCampbell County
StateKentucky
Coordinates38.96056, -84.32389
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating37.1 US tons
Inventory rating22.3 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length109 ft (33.2 m)
Longest span53 ft (16.2 m)
Deck width18 ft (5.6 m)
Roadway width16 ft (5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic225 (2021)
Projected traffic225 by 2041
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$249,000
NavigationNo navigation control on waterway

Frequently asked questions

When was KY-2921 over Twelvemile Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is KY-2921 over Twelvemile 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 August 2023.

How much traffic does KY-2921 over Twelvemile Creek carry?

About 225 vehicles per day (2021 count).

How long is KY-2921 over Twelvemile Creek?

The structure is 109 ft (33.2 m) long with a longest span of 53 ft (16.2 m) and a deck 18 ft wide.

Who owns KY-2921 over Twelvemile Creek?

It is owned by the State Highway Agency.