US Bridges

Nfa A256 over Muddy Creek

FairPosted for load

McNairy County, Tennessee · 2 MI N of SR57 · Structure no. 550A2560001

Built
1975
50 years old
Condition
Fair
inspected August 2024
Type
Channel Beam
Concrete
Length
48 ft
2 main spans
Daily traffic
70
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A256 over Muddy Creek is a concrete channel beam carrying Nfa A256 over Muddy Creek in McNairy County, Tennessee. It was built in 1975, so it is 50 years old, older than the Tennessee average of 47.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 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 70 vehicles a day, roughly 2% of them trucks, projected to reach 112 by 2042. The structure is 48 ft (14.6 m) long and 26 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNfa A256
CrossesMuddy Creek
Location2 MI N of SR57
RouteCounty Highway 256
CountyMcNairy County
StateTennessee
Coordinates35.09006, -88.50742
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30.8 US tons
Inventory rating15 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans2
Design loadH 15
Structure length48 ft (14.6 m)
Longest span29 ft (8.7 m)
Deck width26 ft (7.8 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic70 (2020)
Projected traffic112 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$305,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A256 over Muddy Creek built?

It was built in 1975, making it 50 years old in 2025.

What condition is Nfa A256 over Muddy 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 August 2024.

How much traffic does Nfa A256 over Muddy Creek carry?

About 70 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A256 over Muddy Creek?

The structure is 48 ft (14.6 m) long with a longest span of 29 ft (8.7 m) and a deck 26 ft wide.

Who owns Nfa A256 over Muddy Creek?

It is owned by the County Highway Agency.