US Bridges

Nfa A488 (sa 5432) over Spring Creek

Good

McMinn County, Tennessee · 2MI West of I75 · Structure no. 540A4880001

Built
1970
55 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
60 ft
2 main spans
Daily traffic
370
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A488 (sa 5432) over Spring Creek is a steel continuous stringer/multi-beam or girder carrying Nfa A488 (sa 5432) over Spring Creek in McMinn County, Tennessee. It was built in 1970, so it is 55 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 370 vehicles a day, roughly 2% of them trucks, projected to reach 592 by 2042. The structure is 60 ft (18.3 m) long and 22 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesNfa A488 (sa 5432)
CrossesSpring Creek
Location2MI West of I75
RouteCounty Highway 488
CountyMcMinn County
StateTennessee
Coordinates35.34086, -84.77981
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
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 geometry4: Meets minimum tolerable limits to be left in place as is
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 typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckCorrugated steel
Main spans2
Design loadUnknown
Structure length60 ft (18.3 m)
Longest span30 ft (9.1 m)
Deck width22 ft (6.7 m)
Roadway width22 ft (6.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic370 (2020)
Projected traffic592 by 2042
Trucks2%
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$200,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A488 (sa 5432) over Spring Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is Nfa A488 (sa 5432) over Spring Creek 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 September 2023.

How much traffic does Nfa A488 (sa 5432) over Spring Creek carry?

About 370 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A488 (sa 5432) over Spring Creek?

The structure is 60 ft (18.3 m) long with a longest span of 30 ft (9.1 m) and a deck 22 ft wide.

Who owns Nfa A488 (sa 5432) over Spring Creek?

It is owned by the County Highway Agency.