US Bridges

FAU 3546 over Tn River & A231 & A267

Fair

Hamilton County, Tennessee · 0VER Tn Rv in Chattanooga · Structure no. 33035460001

Built
1984
41 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
2,618 ft
5 main spans
Daily traffic
15,172
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

FAU 3546 over Tn River & A231 & A267 is a steel continuous stringer/multi-beam or girder carrying FAU 3546 over Tn River & A231 & A267 in Hamilton 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 5 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 15,172 vehicles a day, roughly 4% of them trucks, projected to reach 24,275 by 2042. The structure is 2,618 ft (797.9 m) long and 93 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesFAU 3546
CrossesTn River & A231 & A267
Location0VER Tn Rv in Chattanooga
RouteCity Street 3546
Coordinates35.05397, -85.30355
Functional classUrban Minor 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.5 US tons
Inventory rating28.9 US tons

Structure

MaterialSteel Continuous
DeckConcrete, precast panels
Main spans5 (+8 approach)
Design loadHS 20
Structure length2,618 ft (797.9 m)
Longest span420 ft (128 m)
Deck width93 ft (28.3 m)
Roadway width91 ft (27.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,172 (2021)
Projected traffic24,275 by 2042
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway and waterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$109.3 million (2022 estimate)
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was FAU 3546 over Tn River & A231 & A267 built?

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

What condition is FAU 3546 over Tn River & A231 & A267 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 2023.

How much traffic does FAU 3546 over Tn River & A231 & A267 carry?

About 15,172 vehicles per day (2021 count), of which roughly 4% are trucks.

How long is FAU 3546 over Tn River & A231 & A267?

The structure is 2,618 ft (797.9 m) long with a longest span of 420 ft (128 m) and a deck 93 ft wide.

Who owns FAU 3546 over Tn River & A231 & A267?

It is owned by the City or Municipal Highway Agency.