US Bridges

US-45 over Unknown Stream

Fair

Graves County, Kentucky · .5 MI South Ky 1763 · Structure no. 042B00299N

Built
2019
6 years old
Condition
Fair
inspected November 2024
Type
Culvert
Aluminum, Wrought Iron, or Cast Iron
Length
24 ft
1 main span
Daily traffic
1,380
2023 count
Owner
State
State Highway Agency

About this bridge

US-45 over Unknown Stream is a aluminum, wrought iron, or cast iron culvert carrying US-45 over Unknown Stream in Graves County, Kentucky. It was built in 2019, so it is 6 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 1,380 vehicles a day, roughly 9% of them trucks, projected to reach 1,380 by 2043. The structure is 24 ft (7.4 m) long and 36 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesUS-45
CrossesUnknown Stream
Location.5 MI South Ky 1763
RouteU.S. Route 45
CountyGraves County
StateKentucky
Coordinates36.59944, -88.78722
Functional classRural Major Collector

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 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.7 US tons
Inventory rating58.5 US tons

Structure

Structure typeCulvert
MaterialAluminum, Wrought Iron, or Cast Iron
DeckNot applicable
Main spans1
Design loadGreater than HL 93
Structure length24 ft (7.4 m)
Longest span24 ft (7.4 m)
Deck width36 ft (11 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,380 (2023)
Projected traffic1,380 by 2043
Trucks9%
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

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 US-45 over Unknown Stream built?

It was built in 2019, making it 6 years old in 2025.

What condition is US-45 over Unknown Stream 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 2024.

How much traffic does US-45 over Unknown Stream carry?

About 1,380 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is US-45 over Unknown Stream?

The structure is 24 ft (7.4 m) long with a longest span of 24 ft (7.4 m) and a deck 36 ft wide.

Who owns US-45 over Unknown Stream?

It is owned by the State Highway Agency.