US Bridges

KY-778 over Muddy Fork Little River

FairPosted for load

Trigg County, Kentucky · 3.2 MI N.W. of JCT Ky 139 · Structure no. 111B00055N

Built
1963
62 years old
Condition
Fair
inspected December 2023
Type
Tee Beam
Concrete Continuous
Length
245 ft
3 main spans
Daily traffic
612
2023 count
Owner
State
State Highway Agency

About this bridge

KY-778 over Muddy Fork Little River is a concrete continuous tee beam carrying KY-778 over Muddy Fork Little River in Trigg County, Kentucky. It was built in 1963, so it is 62 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. Its operating status is: posted for load restriction.

It carries about 612 vehicles a day, projected to reach 612 by 2043. The structure is 245 ft (74.6 m) long and 27 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesKY-778
CrossesMuddy Fork Little River
Location3.2 MI N.W. of JCT Ky 139
RouteState Highway 778
CountyTrigg County
StateKentucky
Coordinates36.90472, -87.86417
Functional classRural Minor 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating42.5 US tons
Inventory rating25.6 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length245 ft (74.6 m)
Longest span100 ft (30.5 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic612 (2023)
Projected traffic612 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was KY-778 over Muddy Fork Little River built?

It was built in 1963, making it 62 years old in 2025.

What condition is KY-778 over Muddy Fork Little River 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 2023.

How much traffic does KY-778 over Muddy Fork Little River carry?

About 612 vehicles per day (2023 count).

How long is KY-778 over Muddy Fork Little River?

The structure is 245 ft (74.6 m) long with a longest span of 100 ft (30.5 m) and a deck 27 ft wide.

Who owns KY-778 over Muddy Fork Little River?

It is owned by the State Highway Agency.