US Bridges

Nfa 1668 over Graham Creek

FairPosted for load

McNairy County, Tennessee · 1 MI N of US64 · Structure no. 55016680001

Built
1950
75 years old
Condition
Fair
inspected August 2024
Type
Culvert
Concrete Continuous
Length
27 ft
2 main spans
Daily traffic
125
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 1668 over Graham Creek is a concrete continuous culvert carrying Nfa 1668 over Graham Creek in McNairy County, Tennessee. It was built in 1950, so it is 75 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 125 vehicles a day, roughly 4% of them trucks, projected to reach 200 by 2042. The structure is 27 ft (8.1 m) long and 33 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesNfa 1668
CrossesGraham Creek
Location1 MI N of US64
RouteCounty Highway 1668
CountyMcNairy County
StateTennessee
Coordinates35.20456, -88.47439
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
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 rating21.4 US tons
Inventory rating12.9 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 15
Structure length27 ft (8.1 m)
Longest span10 ft (3 m)
Deck width33 ft (10.2 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic125 (2021)
Projected traffic200 by 2042
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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$212,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 1668 over Graham Creek built?

It was built in 1950, making it 75 years old in 2025.

What condition is Nfa 1668 over Graham 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 1668 over Graham Creek carry?

About 125 vehicles per day (2021 count), of which roughly 4% are trucks.

How long is Nfa 1668 over Graham Creek?

The structure is 27 ft (8.1 m) long with a longest span of 10 ft (3 m) and a deck 33 ft wide.

Who owns Nfa 1668 over Graham Creek?

It is owned by the County Highway Agency.