US Bridges

Nfa 1734 (sa 4027) over Birds Creek

FairPosted for load

Henry County, Tennessee · 3 Mi. W. of SR54 · Structure no. 40017340001

Built
1970
55 years old
Condition
Fair
inspected September 2023
Type
Channel Beam
Concrete
Length
38 ft
2 main spans
Daily traffic
297
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 1734 (sa 4027) over Birds Creek is a concrete channel beam carrying Nfa 1734 (sa 4027) over Birds Creek in Henry County, Tennessee. It was built in 1970, so it is 55 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 297 vehicles a day, roughly 3% of them trucks, projected to reach 475 by 2042. The structure is 38 ft (11.6 m) long and 22 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesNfa 1734 (sa 4027)
CrossesBirds Creek
Location3 Mi. W. of SR54
RouteCounty Highway 1734
CountyHenry County
StateTennessee
Coordinates36.3792, -88.3695
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34 US tons
Inventory rating26.1 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans2
Design loadH 15
Structure length38 ft (11.6 m)
Longest span19 ft (5.8 m)
Deck width22 ft (6.6 m)
Roadway width21 ft (6.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic297 (2021)
Projected traffic475 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$544,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 1734 (sa 4027) over Birds Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is Nfa 1734 (sa 4027) over Birds 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 September 2023.

How much traffic does Nfa 1734 (sa 4027) over Birds Creek carry?

About 297 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 1734 (sa 4027) over Birds Creek?

The structure is 38 ft (11.6 m) long with a longest span of 19 ft (5.8 m) and a deck 22 ft wide.

Who owns Nfa 1734 (sa 4027) over Birds Creek?

It is owned by the County Highway Agency.