US Bridges

Nfa 1351 (sa 8604) over North Indian Creek

Fair

Unicoi County, Tennessee · In Unicoi · Structure no. 86S24400007

Built
1976
49 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
113 ft
2 main spans
Daily traffic
1,607
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 1351 (sa 8604) over North Indian Creek is a prestressed concrete continuous stringer/multi-beam or girder carrying Nfa 1351 (sa 8604) over North Indian Creek in Unicoi County, Tennessee. It was built in 1976, so it is 49 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 1,607 vehicles a day, roughly 1% of them trucks, projected to reach 2,571 by 2042. The structure is 113 ft (34.4 m) long and 36 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNfa 1351 (sa 8604)
CrossesNorth Indian Creek
LocationIn Unicoi
RouteCounty Highway 1351
CountyUnicoi County
StateTennessee
Coordinates36.19412, -82.35175
Functional classUrban 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51.8 US tons
Inventory rating27.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length113 ft (34.4 m)
Longest span56 ft (17.2 m)
Deck width36 ft (11 m)
Roadway width32 ft (9.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,607 (2021)
Projected traffic2,571 by 2042
Trucks1%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 1351 (sa 8604) over North Indian Creek built?

It was built in 1976, making it 49 years old in 2025.

What condition is Nfa 1351 (sa 8604) over North Indian 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 Nfa 1351 (sa 8604) over North Indian Creek carry?

About 1,607 vehicles per day (2021 count), of which roughly 1% are trucks.

How long is Nfa 1351 (sa 8604) over North Indian Creek?

The structure is 113 ft (34.4 m) long with a longest span of 56 ft (17.2 m) and a deck 36 ft wide.

Who owns Nfa 1351 (sa 8604) over North Indian Creek?

It is owned by the County Highway Agency.