US Bridges

Nfa A447 over Poplar Spring Creek

Fair

Marion County, Tennessee · Near South Pittsburg · Structure no. 580A4470001

Built
1940
85 years old
Condition
Fair
inspected October 2024
Type
Culvert
Concrete
Length
20 ft
1 main span
Daily traffic
330
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Nfa A447 over Poplar Spring Creek is a concrete culvert carrying Nfa A447 over Poplar Spring Creek in Marion County, Tennessee. It was built in 1940, so it is 85 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 330 vehicles a day, roughly 2% of them trucks, projected to reach 528 by 2040. The structure is 20 ft (6.1 m) long and 22 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesNfa A447
CrossesPoplar Spring Creek
LocationNear South Pittsburg
RouteCounty Highway 447
CountyMarion County
StateTennessee
Coordinates34.99799, -85.73784
Functional classUrban Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 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 geometry4: Meets minimum tolerable limits to be left in place as is
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
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length20 ft (6.1 m)
Longest span20 ft (6.1 m)
Deck width22 ft (6.8 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic330 (2020)
Projected traffic528 by 2040
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$91,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A447 over Poplar Spring Creek built?

It was built in 1940, making it 85 years old in 2025.

What condition is Nfa A447 over Poplar Spring 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 October 2024.

How much traffic does Nfa A447 over Poplar Spring Creek carry?

About 330 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A447 over Poplar Spring Creek?

The structure is 20 ft (6.1 m) long with a longest span of 20 ft (6.1 m) and a deck 22 ft wide.

Who owns Nfa A447 over Poplar Spring Creek?

It is owned by the City or Municipal Highway Agency.