US Bridges

FAP 99 over Flat Branch

Fair

Lewis County, Tennessee · 10.01 Mi. E of Hohenwald · Structure no. 51SR0990015

Built
1954
71 years old
Condition
Fair
inspected May 2023
Type
Culvert
Concrete Continuous
Length
33 ft
2 main spans
Daily traffic
3,522
2021 count
Owner
State
State Highway Agency

About this bridge

FAP 99 over Flat Branch is a concrete continuous culvert carrying FAP 99 over Flat Branch in Lewis 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 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 3,522 vehicles a day, roughly 10% of them trucks, projected to reach 5,584 by 2041. The structure is 33 ft (10.1 m) long. If it were closed, the detour would be 70.8 mi (114 km).

Location

Open in Google Maps
CarriesFAP 99
CrossesFlat Branch
Location10.01 Mi. E of Hohenwald
RouteState Highway 99
CountyLewis County
StateTennessee
Coordinates35.56417, -87.37344
Functional classRural Principal Arterial - Other

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 protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length33 ft (10.1 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,522 (2021)
Projected traffic5,584 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed70.8 mi (114 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$317,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was FAP 99 over Flat Branch built?

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

What condition is FAP 99 over Flat 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 May 2023.

How much traffic does FAP 99 over Flat Branch carry?

About 3,522 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is FAP 99 over Flat Branch?

The structure is 33 ft (10.1 m) long with a longest span of 10 ft (3 m).

Who owns FAP 99 over Flat Branch?

It is owned by the State Highway Agency.