US Bridges

Nfa 810 (sa 8421) over Branch

FairPosted for load

Tipton County, Tennessee · 1.8 MI W of Mason · Structure no. 84S80710015

Built
1954
71 years old
Condition
Fair
inspected February 2024
Type
Channel Beam
Concrete
Length
95 ft
5 main spans
Daily traffic
2,044
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 810 (sa 8421) over Branch is a concrete channel beam carrying Nfa 810 (sa 8421) over Branch in Tipton County, Tennessee. It was built in 1954, so it is 71 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 2,044 vehicles a day, roughly 3% of them trucks, projected to reach 3,270 by 2042. The structure is 95 ft (29 m) long and 25 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesNfa 810 (sa 8421)
CrossesBranch
Location1.8 MI W of Mason
RouteCounty Highway 810
CountyTipton County
StateTennessee
Coordinates35.41244, -89.57242
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32.5 US tons
Inventory rating25 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans5
Design loadHS 20
Structure length95 ft (29 m)
Longest span19 ft (5.8 m)
Deck width25 ft (7.7 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,044 (2021)
Projected traffic3,270 by 2042
Trucks3%
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 statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$538,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 810 (sa 8421) over Branch built?

It was built in 1954, making it 71 years old in 2025.

What condition is Nfa 810 (sa 8421) over Branch 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 February 2024.

How much traffic does Nfa 810 (sa 8421) over Branch carry?

About 2,044 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 810 (sa 8421) over Branch?

The structure is 95 ft (29 m) long with a longest span of 19 ft (5.8 m) and a deck 25 ft wide.

Who owns Nfa 810 (sa 8421) over Branch?

It is owned by the County Highway Agency.