US Bridges

Rocky Knob Branch over Mudlick Creek

Fair

Johnson County, Kentucky · @ JCT of Ky 172 · Structure no. 058C00029N

Built
1986
39 years old
Condition
Fair
inspected December 2022
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
51 ft
1 main span
Daily traffic
257
2011 count
Owner
County
County Highway Agency

About this bridge

Rocky Knob Branch over Mudlick Creek is a prestressed concrete box beam or girders - multiple carrying Rocky Knob Branch over Mudlick Creek in Johnson County, Kentucky. It was built in 1986, so it is 39 years old, younger 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 6 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 257 vehicles a day, projected to reach 257 by 2031. The structure is 51 ft (15.5 m) long and 15 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesRocky Knob Branch
CrossesMudlick Creek
Location@ JCT of Ky 172
RouteCounty Highway 1261
CountyJohnson County
StateKentucky
Coordinates37.84694, -82.85889
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating109.9 US tons
Inventory rating66 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length51 ft (15.5 m)
Longest span48 ft (14.6 m)
Deck width15 ft (4.6 m)
Roadway width13 ft (4.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic257 (2011)
Projected traffic257 by 2031
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$93,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Rocky Knob Branch over Mudlick Creek built?

It was built in 1986, making it 39 years old in 2025.

What condition is Rocky Knob Branch over Mudlick 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 December 2022.

How much traffic does Rocky Knob Branch over Mudlick Creek carry?

About 257 vehicles per day (2011 count).

How long is Rocky Knob Branch over Mudlick Creek?

The structure is 51 ft (15.5 m) long with a longest span of 48 ft (14.6 m) and a deck 15 ft wide.

Who owns Rocky Knob Branch over Mudlick Creek?

It is owned by the County Highway Agency.