US Bridges

Nfa A646 over Br of N Fork Forked Deer

Good

Gibson County, Tennessee · 2.4 MI NE JCT SR76&SR186 · Structure no. 270A6460001

Built
2008
17 years old
Condition
Good
inspected July 2023
Type
Culvert
Concrete Continuous
Length
40 ft
2 main spans
Daily traffic
90
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A646 over Br of N Fork Forked Deer is a concrete continuous culvert carrying Nfa A646 over Br of N Fork Forked Deer in Gibson County, Tennessee. It was built in 2008, so it is 17 years old, younger than the Tennessee average of 47.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 90 vehicles a day, roughly 2% of them trucks, projected to reach 144 by 2042. The structure is 40 ft (12.2 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesNfa A646
CrossesBr of N Fork Forked Deer
Location2.4 MI NE JCT SR76&SR186
RouteCounty Highway 646
CountyGibson County
StateTennessee
Coordinates35.8893, -88.8087
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length40 ft (12.2 m)
Longest span33 ft (10.1 m)
Deck width32 ft (9.8 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic90 (2020)
Projected traffic144 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

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 A646 over Br of N Fork Forked Deer built?

It was built in 2008, making it 17 years old in 2025.

What condition is Nfa A646 over Br of N Fork Forked Deer in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2023.

How much traffic does Nfa A646 over Br of N Fork Forked Deer carry?

About 90 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A646 over Br of N Fork Forked Deer?

The structure is 40 ft (12.2 m) long with a longest span of 33 ft (10.1 m) and a deck 32 ft wide.

Who owns Nfa A646 over Br of N Fork Forked Deer?

It is owned by the County Highway Agency.