US Bridges

Nfa 1437 (sa 6604) over Branch

FairPosted for load

Obion County, Tennessee · 4 MI E of Lake Co. · Structure no. 66S80050003

Built
1960
65 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
40 ft
2 main spans
Daily traffic
366
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 1437 (sa 6604) over Branch is a steel continuous stringer/multi-beam or girder carrying Nfa 1437 (sa 6604) over Branch in Obion 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 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 366 vehicles a day, roughly 3% of them trucks, projected to reach 720 by 2041. The structure is 40 ft (12.2 m) long and 28 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesNfa 1437 (sa 6604)
CrossesBranch
Location4 MI E of Lake Co.
RouteCounty Highway 1437
CountyObion County
StateTennessee
Coordinates36.24758, -89.32922
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating77.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length40 ft (12.2 m)
Longest span24 ft (7.3 m)
Deck width28 ft (8.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic366 (2021)
Projected traffic720 by 2041
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 1437 (sa 6604) over Branch built?

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

What condition is Nfa 1437 (sa 6604) over Branch 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 March 2023.

How much traffic does Nfa 1437 (sa 6604) over Branch carry?

About 366 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 1437 (sa 6604) over Branch?

The structure is 40 ft (12.2 m) long with a longest span of 24 ft (7.3 m) and a deck 28 ft wide.

Who owns Nfa 1437 (sa 6604) over Branch?

It is owned by the County Highway Agency.