US Bridges

Nfa A303 over Branch

Fair

Anderson County, Tennessee · S of US25W-2 M W of Knox · Structure no. 010A3030001

Built
1984
41 years old
Condition
Fair
inspected July 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
42 ft
1 main span
Daily traffic
560
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A303 over Branch is a prestressed concrete box beam or girders - multiple carrying Nfa A303 over Branch in Anderson County, Tennessee. It was built in 1984, so it is 41 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 6 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 560 vehicles a day, roughly 2% of them trucks, projected to reach 896 by 2041. The structure is 42 ft (12.9 m) long and 24 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesNfa A303
CrossesBranch
LocationS of US25W-2 M W of Knox
RouteCounty Highway 303
CountyAnderson County
StateTennessee
Coordinates36.03472, -84.104
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating92.2 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length42 ft (12.9 m)
Longest span39 ft (12 m)
Deck width24 ft (7.4 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic560 (2020)
Projected traffic896 by 2041
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A303 over Branch built?

It was built in 1984, making it 41 years old in 2025.

What condition is Nfa A303 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 July 2023.

How much traffic does Nfa A303 over Branch carry?

About 560 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A303 over Branch?

The structure is 42 ft (12.9 m) long with a longest span of 39 ft (12 m) and a deck 24 ft wide.

Who owns Nfa A303 over Branch?

It is owned by the County Highway Agency.