US Bridges

FAS 61 over Flat Creek

Fair

Union County, Tennessee · 2.1 M NW of Knox CO LN · Structure no. 87SR0610005

Built
1970
55 years old
Condition
Fair
inspected July 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
98 ft
3 main spans
Daily traffic
2,849
2021 count
Owner
State
State Highway Agency

About this bridge

FAS 61 over Flat Creek is a prestressed concrete box beam or girders - multiple carrying FAS 61 over Flat Creek in Union 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.

It carries about 2,849 vehicles a day, roughly 5% of them trucks, projected to reach 4,016 by 2040. The structure is 98 ft (30 m) long and 33 ft wide. If it were closed, the detour would be 52.8 mi (85 km).

CarriesFAS 61
CrossesFlat Creek
Location2.1 M NW of Knox CO LN
RouteState Highway 61
Coordinates36.19593, -83.74577
Functional classRural Major 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
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 alignment8: Equal to present desirable criteria
Operating rating59.5 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckOther
Main spans3
Design loadUnknown
Structure length98 ft (30 m)
Longest span40 ft (12.2 m)
Deck width33 ft (10.1 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,849 (2021)
Projected traffic4,016 by 2040
Trucks5%
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

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$896,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was FAS 61 over Flat Creek built?

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

What condition is FAS 61 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 July 2024.

How much traffic does FAS 61 over Flat Creek carry?

About 2,849 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is FAS 61 over Flat Creek?

The structure is 98 ft (30 m) long with a longest span of 40 ft (12.2 m) and a deck 33 ft wide.

Who owns FAS 61 over Flat Creek?

It is owned by the State Highway Agency.