US Bridges

FAP 73 over Flagg Branch

Good

Blount County, Tennessee · 3.5 M N of SR35 · Structure no. 05SR0730013

Built
1939
86 years old
Condition
Good
inspected October 2023
Type
Culvert
Concrete Continuous
Length
38 ft
3 main spans
Daily traffic
20,238
2021 count
Owner
State
State Highway Agency

About this bridge

FAP 73 over Flagg Branch is a concrete continuous culvert carrying FAP 73 over Flagg Branch in Blount County, Tennessee. It was built in 1939, so it is 86 years old, older than the Tennessee average of 47.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 20,238 vehicles a day, roughly 9% of them trucks, projected to reach 31,094 by 2042. The structure is 38 ft (11.6 m) long. If it were closed, the detour would be 49.7 mi (80 km).

CarriesFAP 73
CrossesFlagg Branch
Location3.5 M N of SR35
RouteU.S. Route 321
Coordinates35.75745, -83.89684
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.7 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadH 15
Structure length38 ft (11.6 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 traffic20,238 (2021)
Projected traffic31,094 by 2042
Trucks9%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed49.7 mi (80 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$584,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was FAP 73 over Flagg Branch built?

It was built in 1939, making it 86 years old in 2025.

What condition is FAP 73 over Flagg Branch in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2023.

How much traffic does FAP 73 over Flagg Branch carry?

About 20,238 vehicles per day (2021 count), of which roughly 9% are trucks.

How long is FAP 73 over Flagg Branch?

The structure is 38 ft (11.6 m) long with a longest span of 10 ft (3 m).

Who owns FAP 73 over Flagg Branch?

It is owned by the State Highway Agency.