US Bridges

Imperial Terrace over Mill Creek

Fair

Jefferson County, Kentucky · 0.1 MI S of Rockford LN · Structure no. 056C00073N

Built
1955
70 years old
Condition
Fair
inspected November 2021
Type
Culvert
Concrete
Length
38 ft
3 main spans
Daily traffic
107
2006 count
Owner
County
County Highway Agency

About this bridge

Imperial Terrace over Mill Creek is a concrete culvert carrying Imperial Terrace over Mill Creek in Jefferson County, Kentucky. It was built in 1955, so it is 70 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 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 107 vehicles a day, projected to reach 198 by 2026. The structure is 38 ft (11.5 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesImperial Terrace
CrossesMill Creek
Location0.1 MI S of Rockford LN
RouteCity Street 1701
CountyJefferson County
StateKentucky
Coordinates38.17583, -85.84639
Functional classUrban 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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating44 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadUnknown
Structure length38 ft (11.5 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic107 (2006)
Projected traffic198 by 2026
Trucks0%
Lanes on structure1
Traffic directionOne-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 Imperial Terrace over Mill Creek built?

It was built in 1955, making it 70 years old in 2025.

What condition is Imperial Terrace over Mill 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 November 2021.

How much traffic does Imperial Terrace over Mill Creek carry?

About 107 vehicles per day (2006 count).

How long is Imperial Terrace over Mill Creek?

The structure is 38 ft (11.5 m) long with a longest span of 12 ft (3.7 m).

Who owns Imperial Terrace over Mill Creek?

It is owned by the County Highway Agency.