US Bridges

Nfa B475 over Spring Creek

Fair

McMinn County, Tennessee · 1.3 Miles West of Athens · Structure no. 54SR0300007

Built
1934
91 years old
Condition
Fair
inspected September 2023
Type
Culvert
Concrete Continuous
Length
35 ft
3 main spans
Daily traffic
380
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa B475 over Spring Creek is a concrete continuous culvert carrying Nfa B475 over Spring Creek in McMinn County, Tennessee. It was built in 1934, so it is 91 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 6 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 380 vehicles a day, roughly 6% of them trucks, projected to reach 608 by 2042. The structure is 35 ft (10.7 m) long and 28 ft wide. If it were closed, the detour would be 52.8 mi (85 km).

Location

Open in Google Maps
CarriesNfa B475
CrossesSpring Creek
Location1.3 Miles West of Athens
RouteCounty Highway 475
CountyMcMinn County
StateTennessee
Coordinates35.47241, -84.67543
Functional classRural 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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 rating46.7 US tons
Inventory rating28.9 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadH 15
Structure length35 ft (10.7 m)
Longest span10 ft (3 m)
Deck width28 ft (8.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic380 (2020)
Projected traffic608 by 2042
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed52.8 mi (85 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$64,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa B475 over Spring Creek built?

It was built in 1934, making it 91 years old in 2025.

What condition is Nfa B475 over 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 September 2023.

How much traffic does Nfa B475 over Spring Creek carry?

About 380 vehicles per day (2020 count), of which roughly 6% are trucks.

How long is Nfa B475 over Spring Creek?

The structure is 35 ft (10.7 m) long with a longest span of 10 ft (3 m) and a deck 28 ft wide.

Who owns Nfa B475 over Spring Creek?

It is owned by the County Highway Agency.