US Bridges

Nfa 1735 (sa 4004) over Obion River

Good

Henry County, Tennessee · 4 Mi. N. of SR76 · Structure no. 400A5750003

Built
1996
29 years old
Condition
Good
inspected October 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
95 ft
3 main spans
Daily traffic
486
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 1735 (sa 4004) over Obion River is a prestressed concrete box beam or girders - multiple carrying Nfa 1735 (sa 4004) over Obion River in Henry County, Tennessee. It was built in 1996, so it is 29 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 486 vehicles a day, roughly 3% of them trucks, projected to reach 778 by 2042. The structure is 95 ft (29 m) long and 32 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesNfa 1735 (sa 4004)
CrossesObion River
Location4 Mi. N. of SR76
RouteCounty Highway 1735
Coordinates36.27764, -88.3878
Functional classRural Minor Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.4 US tons
Inventory rating34.6 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length95 ft (29 m)
Longest span36 ft (11 m)
Deck width32 ft (9.7 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic486 (2021)
Projected traffic778 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 statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 1735 (sa 4004) over Obion River built?

It was built in 1996, making it 29 years old in 2025.

What condition is Nfa 1735 (sa 4004) over Obion River 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 October 2023.

How much traffic does Nfa 1735 (sa 4004) over Obion River carry?

About 486 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 1735 (sa 4004) over Obion River?

The structure is 95 ft (29 m) long with a longest span of 36 ft (11 m) and a deck 32 ft wide.

Who owns Nfa 1735 (sa 4004) over Obion River?

It is owned by the County Highway Agency.