US Bridges

Johnsontown RD over Mill Creek

Good

Jefferson County, Kentucky · 0.25 MI W of Trade Prt DR · Structure no. 056C00080N

Built
1940
85 years old
Condition
Good
inspected November 2023
Type
Culvert
Concrete
Length
23 ft
2 main spans
Daily traffic
7,375
2023 count
Owner
County
County Highway Agency

About this bridge

Johnsontown RD over Mill Creek is a concrete culvert carrying Johnsontown RD over Mill Creek in Jefferson County, Kentucky. It was built in 1940, so it is 85 years old, older 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 7,375 vehicles a day, projected to reach 7,375 by 2043. The structure is 23 ft (6.9 m) long and 43 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesJohnsontown RD
CrossesMill Creek
Location0.25 MI W of Trade Prt DR
RouteCounty Highway 1001
CountyJefferson County
StateKentucky
Coordinates38.11861, -85.88472
Functional classUrban Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating44 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length23 ft (6.9 m)
Longest span11 ft (3.3 m)
Deck width43 ft (13.1 m)
Roadway width21 ft (6.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,375 (2023)
Projected traffic7,375 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Johnsontown RD over Mill Creek built?

It was built in 1940, making it 85 years old in 2025.

What condition is Johnsontown RD over Mill 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 November 2023.

How much traffic does Johnsontown RD over Mill Creek carry?

About 7,375 vehicles per day (2023 count).

How long is Johnsontown RD over Mill Creek?

The structure is 23 ft (6.9 m) long with a longest span of 11 ft (3.3 m) and a deck 43 ft wide.

Who owns Johnsontown RD over Mill Creek?

It is owned by the County Highway Agency.