US Bridges

Nfa A601 over Sweetwater Creek

FairPosted for load

Loudon County, Tennessee · In Philadelphia · Structure no. 530A6010001

Built
1970
55 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
75 ft
1 main span
Daily traffic
670
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Nfa A601 over Sweetwater Creek is a steel stringer/multi-beam or girder carrying Nfa A601 over Sweetwater Creek in Loudon 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 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. Its operating status is: posted for load restriction.

It carries about 670 vehicles a day, roughly 2% of them trucks, projected to reach 1,072 by 2042. The structure is 75 ft (23 m) long and 26 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesNfa A601
CrossesSweetwater Creek
LocationIn Philadelphia
RouteCity Street 601
CountyLoudon County
StateTennessee
Coordinates35.68, -84.40502
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating5.4 US tons
Inventory rating4.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadUnknown
Structure length75 ft (23 m)
Longest span59 ft (18 m)
Deck width26 ft (7.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic670 (2020)
Projected traffic1,072 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A601 over Sweetwater Creek built?

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

What condition is Nfa A601 over Sweetwater 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 August 2024.

How much traffic does Nfa A601 over Sweetwater Creek carry?

About 670 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A601 over Sweetwater Creek?

The structure is 75 ft (23 m) long with a longest span of 59 ft (18 m) and a deck 26 ft wide.

Who owns Nfa A601 over Sweetwater Creek?

It is owned by the City or Municipal Highway Agency.