US Bridges

Nfa 846 (sa 3816) over Cobb Creek

Fair

Haywood County, Tennessee · 5.0 MI NE JCT SR76&SR369 · Structure no. 38S81310005

Built
1960
65 years old
Condition
Fair
inspected August 2023
Type
Culvert
Concrete Continuous
Length
27 ft
2 main spans
Daily traffic
241
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 846 (sa 3816) over Cobb Creek is a concrete continuous culvert carrying Nfa 846 (sa 3816) over Cobb Creek in Haywood County, Tennessee. It was built in 1960, so it is 65 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 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 241 vehicles a day, roughly 3% of them trucks, projected to reach 386 by 2042. The structure is 27 ft (8.2 m) long and 37 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesNfa 846 (sa 3816)
CrossesCobb Creek
Location5.0 MI NE JCT SR76&SR369
RouteCounty Highway 846
CountyHaywood County
StateTennessee
Coordinates35.63553, -89.15064
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.6 US tons
Inventory rating31.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length27 ft (8.2 m)
Longest span12 ft (3.7 m)
Deck width37 ft (11.3 m)
Roadway width35 ft (10.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic241 (2021)
Projected traffic386 by 2042
Trucks3%
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 846 (sa 3816) over Cobb Creek built?

It was built in 1960, making it 65 years old in 2025.

What condition is Nfa 846 (sa 3816) over Cobb 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 2023.

How much traffic does Nfa 846 (sa 3816) over Cobb Creek carry?

About 241 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 846 (sa 3816) over Cobb Creek?

The structure is 27 ft (8.2 m) long with a longest span of 12 ft (3.7 m) and a deck 37 ft wide.

Who owns Nfa 846 (sa 3816) over Cobb Creek?

It is owned by the County Highway Agency.