US Bridges

Nfa 2479 (sa 2908) over Williams Creek

Fair

Grainger County, Tennessee · North of SR131 · Structure no. 29024790005

Built
1990
35 years old
Condition
Fair
inspected April 2023
Type
Culvert
Concrete Continuous
Length
35 ft
2 main spans
Daily traffic
989
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 2479 (sa 2908) over Williams Creek is a concrete continuous culvert carrying Nfa 2479 (sa 2908) over Williams Creek in Grainger County, Tennessee. It was built in 1990, so it is 35 years old, younger 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 5 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 989 vehicles a day, roughly 3% of them trucks, projected to reach 1,752 by 2041. The structure is 35 ft (10.7 m) long and 48 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesNfa 2479 (sa 2908)
CrossesWilliams Creek
LocationNorth of SR131
RouteCounty Highway 2479
CountyGrainger County
StateTennessee
Coordinates36.30368, -83.59713
Functional classRural Minor 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
Channel and channel protection7 GoodSome minor problems.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length35 ft (10.7 m)
Longest span24 ft (7.2 m)
Deck width48 ft (14.7 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic989 (2021)
Projected traffic1,752 by 2041
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 2479 (sa 2908) over Williams Creek built?

It was built in 1990, making it 35 years old in 2025.

What condition is Nfa 2479 (sa 2908) over Williams 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 April 2023.

How much traffic does Nfa 2479 (sa 2908) over Williams Creek carry?

About 989 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 2479 (sa 2908) over Williams Creek?

The structure is 35 ft (10.7 m) long with a longest span of 24 ft (7.2 m) and a deck 48 ft wide.

Who owns Nfa 2479 (sa 2908) over Williams Creek?

It is owned by the County Highway Agency.