US Bridges

FAP 397 over Branch

Fair

Williamson County, Tennessee · 1.3 MI NE JCT SR6&SR96 · Structure no. 94SR3970009

Built
1988
37 years old
Condition
Fair
inspected March 2023
Type
Culvert
Concrete Continuous
Length
27 ft
2 main spans
Daily traffic
14,693
2021 count
Owner
State
State Highway Agency

About this bridge

FAP 397 over Branch is a concrete continuous culvert carrying FAP 397 over Branch in Williamson County, Tennessee. It was built in 1988, so it is 37 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 14,693 vehicles a day, roughly 9% of them trucks, projected to reach 19,080 by 2041. The structure is 27 ft (8.2 m) long and 54 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesFAP 397
CrossesBranch
Location1.3 MI NE JCT SR6&SR96
RouteState Highway 397
CountyWilliamson County
StateTennessee
Coordinates35.92197, -86.84368
Functional classUrban Other Principal Arterial

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length27 ft (8.2 m)
Longest span12 ft (3.7 m)
Deck width54 ft (16.5 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,693 (2021)
Projected traffic19,080 by 2041
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 FAP 397 over Branch built?

It was built in 1988, making it 37 years old in 2025.

What condition is FAP 397 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 March 2023.

How much traffic does FAP 397 over Branch carry?

About 14,693 vehicles per day (2021 count), of which roughly 9% are trucks.

How long is FAP 397 over Branch?

The structure is 27 ft (8.2 m) long with a longest span of 12 ft (3.7 m) and a deck 54 ft wide.

Who owns FAP 397 over Branch?

It is owned by the State Highway Agency.