US Bridges

Nfa 808 (sa 8412) over Rocky Branch

Good

Tipton County, Tennessee · 3 MI W of Covington · Structure no. 84F00030005

Built
2020
5 years old
Condition
Good
inspected March 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
75 ft
1 main span
Daily traffic
736
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 808 (sa 8412) over Rocky Branch is a prestressed concrete box beam or girders - single or spread carrying Nfa 808 (sa 8412) over Rocky Branch in Tipton County, Tennessee. It was built in 2020, so it is 5 years old, younger than the Tennessee average of 47.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 736 vehicles a day, roughly 3% of them trucks, projected to reach 728 by 2042. The structure is 75 ft (22.9 m) long and 28 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesNfa 808 (sa 8412)
CrossesRocky Branch
Location3 MI W of Covington
RouteCounty Highway 808
CountyTipton County
StateTennessee
Coordinates35.5942, -89.71236
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length75 ft (22.9 m)
Longest span75 ft (22.9 m)
Deck width28 ft (8.6 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic736 (2021)
Projected traffic728 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 808 (sa 8412) over Rocky Branch built?

It was built in 2020, making it 5 years old in 2025.

What condition is Nfa 808 (sa 8412) over Rocky Branch in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2024.

How much traffic does Nfa 808 (sa 8412) over Rocky Branch carry?

About 736 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 808 (sa 8412) over Rocky Branch?

The structure is 75 ft (22.9 m) long with a longest span of 75 ft (22.9 m) and a deck 28 ft wide.

Who owns Nfa 808 (sa 8412) over Rocky Branch?

It is owned by the County Highway Agency.