US Bridges

Nfa 1262 (sa 4727) over Flat Creek

Fair

Knox County, Tennessee · In Mascot · Structure no. 47S25050003

Built
1927
98 years old
Condition
Fair
inspected June 2024
Type
Arch - Deck
Concrete
Length
73 ft
1 main span
Daily traffic
2,042
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 1262 (sa 4727) over Flat Creek is a concrete arch - deck carrying Nfa 1262 (sa 4727) over Flat Creek in Knox County, Tennessee. It was built in 1927, so it is 98 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 2,042 vehicles a day, roughly 1% of them trucks, projected to reach 3,136 by 2040. The structure is 73 ft (22.2 m) long and 19 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNfa 1262 (sa 4727)
CrossesFlat Creek
LocationIn Mascot
RouteCounty Highway 1262
CountyKnox County
StateTennessee
Coordinates36.06175, -83.74574
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
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating39.7 US tons
Inventory rating26.8 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length73 ft (22.2 m)
Longest span65 ft (19.7 m)
Deck width19 ft (5.9 m)
Roadway width18 ft (5.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,042 (2021)
Projected traffic3,136 by 2040
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$446,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 1262 (sa 4727) over Flat Creek built?

It was built in 1927, making it 98 years old in 2025.

What condition is Nfa 1262 (sa 4727) 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 1262 (sa 4727) over Flat Creek carry?

About 2,042 vehicles per day (2021 count), of which roughly 1% are trucks.

How long is Nfa 1262 (sa 4727) over Flat Creek?

The structure is 73 ft (22.2 m) long with a longest span of 65 ft (19.7 m) and a deck 19 ft wide.

Who owns Nfa 1262 (sa 4727) over Flat Creek?

It is owned by the County Highway Agency.