US Bridges

Nfa 1792 (sa 6806) over Buffalo River

Fair

Perry County, Tennessee · 7 M. N. Linden. · Structure no. 68017920001

Built
1985
40 years old
Condition
Fair
inspected May 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
469 ft
3 main spans
Daily traffic
84
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 1792 (sa 6806) over Buffalo River is a prestressed concrete continuous box beam or girders - single or spread carrying Nfa 1792 (sa 6806) over Buffalo River in Perry County, Tennessee. It was built in 1985, so it is 40 years old, younger 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.

It carries about 84 vehicles a day, roughly 2% of them trucks, projected to reach 181 by 2041. The structure is 469 ft (143.1 m) long and 24 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesNfa 1792 (sa 6806)
CrossesBuffalo River
Location7 M. N. Linden.
RouteCounty Highway 1792
CountyPerry County
StateTennessee
Coordinates35.66834, -87.81435
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating71.8 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length469 ft (143.1 m)
Longest span95 ft (29 m)
Deck width24 ft (7.3 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic84 (2021)
Projected traffic181 by 2041
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$1.1 million (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 1792 (sa 6806) over Buffalo River built?

It was built in 1985, making it 40 years old in 2025.

What condition is Nfa 1792 (sa 6806) over Buffalo 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 May 2023.

How much traffic does Nfa 1792 (sa 6806) over Buffalo River carry?

About 84 vehicles per day (2021 count), of which roughly 2% are trucks.

How long is Nfa 1792 (sa 6806) over Buffalo River?

The structure is 469 ft (143.1 m) long with a longest span of 95 ft (29 m) and a deck 24 ft wide.

Who owns Nfa 1792 (sa 6806) over Buffalo River?

It is owned by the County Highway Agency.