US Bridges

Nfa 1273 (sa 4744) over Flat Creek

Fair

Knox County, Tennessee · Mine Rd-Near Mascot · Structure no. 470D5760001

Built
1950
75 years old, rebuilt 1960
Condition
Fair
inspected June 2024
Type
Tee Beam
Concrete
Length
86 ft
2 main spans
Daily traffic
4,749
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 1273 (sa 4744) over Flat Creek is a concrete tee beam carrying Nfa 1273 (sa 4744) over Flat Creek in Knox County, Tennessee. It was built in 1950 and reconstructed in 1960, so it is 75 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 4,749 vehicles a day, roughly 1% of them trucks, projected to reach 7,536 by 2040. The structure is 86 ft (26.3 m) long and 38 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesNfa 1273 (sa 4744)
CrossesFlat Creek
LocationMine Rd-Near Mascot
RouteCounty Highway 1273
CountyKnox County
StateTennessee
Coordinates36.07763, -83.74313
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length86 ft (26.3 m)
Longest span43 ft (13.1 m)
Deck width38 ft (11.6 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,749 (2021)
Projected traffic7,536 by 2040
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 1273 (sa 4744) over Flat Creek built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1960.

What condition is Nfa 1273 (sa 4744) over Flat Creek 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 June 2024.

How much traffic does Nfa 1273 (sa 4744) over Flat Creek carry?

About 4,749 vehicles per day (2021 count), of which roughly 1% are trucks.

How long is Nfa 1273 (sa 4744) over Flat Creek?

The structure is 86 ft (26.3 m) long with a longest span of 43 ft (13.1 m) and a deck 38 ft wide.

Who owns Nfa 1273 (sa 4744) over Flat Creek?

It is owned by the County Highway Agency.