US Bridges

FAU 3780 730617V over Southern Railway

Fair

Knox County, Tennessee · In Knoxville · Structure no. 47M37800001

Built
1937
88 years old
Condition
Fair
inspected March 2024
Type
Tee Beam
Concrete
Length
93 ft
3 main spans
Daily traffic
13,336
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

FAU 3780 730617V over Southern Railway is a concrete tee beam carrying FAU 3780 730617V over Southern Railway in Knox County, Tennessee. It was built in 1937, so it is 88 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 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 13,336 vehicles a day, roughly 3% of them trucks, projected to reach 21,338 by 2042. The structure is 93 ft (28.4 m) long and 52 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesFAU 3780 730617V
CrossesSouthern Railway
LocationIn Knoxville
RouteCity Street 3780
CountyKnox County
StateTennessee
Coordinates35.96209, -83.93542
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.7 US tons
Inventory rating26.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length93 ft (28.4 m)
Longest span46 ft (14 m)
Deck width52 ft (16 m)
Roadway width40 ft (12.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,336 (2021)
Projected traffic21,338 by 2042
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.4 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was FAU 3780 730617V over Southern Railway built?

It was built in 1937, making it 88 years old in 2025.

What condition is FAU 3780 730617V over Southern Railway 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 2024.

How much traffic does FAU 3780 730617V over Southern Railway carry?

About 13,336 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is FAU 3780 730617V over Southern Railway?

The structure is 93 ft (28.4 m) long with a longest span of 46 ft (14 m) and a deck 52 ft wide.

Who owns FAU 3780 730617V over Southern Railway?

It is owned by the City or Municipal Highway Agency.