US Bridges

Nfa A174 over Bybee Branch

Fair

Warren County, Tennessee · 2MI North of SR1BYPASS · Structure no. 890A1740001

Built
1935
90 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
24 ft
1 main span
Daily traffic
370
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Nfa A174 over Bybee Branch is a steel stringer/multi-beam or girder carrying Nfa A174 over Bybee Branch in Warren County, Tennessee. It was built in 1935, so it is 90 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.

It carries about 370 vehicles a day, roughly 2% of them trucks, projected to reach 592 by 2042. The structure is 24 ft (7.3 m) long and 21 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesNfa A174
CrossesBybee Branch
Location2MI North of SR1BYPASS
RouteCounty Highway 174
CountyWarren County
StateTennessee
Coordinates35.70885, -85.76695
Functional classUrban Local

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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating42.5 US tons
Inventory rating25.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length24 ft (7.3 m)
Longest span21 ft (6.4 m)
Deck width21 ft (6.5 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic370 (2020)
Projected traffic592 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$103,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A174 over Bybee Branch built?

It was built in 1935, making it 90 years old in 2025.

What condition is Nfa A174 over Bybee 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 A174 over Bybee Branch carry?

About 370 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A174 over Bybee Branch?

The structure is 24 ft (7.3 m) long with a longest span of 21 ft (6.4 m) and a deck 21 ft wide.

Who owns Nfa A174 over Bybee Branch?

It is owned by the City or Municipal Highway Agency.