US Bridges

Nfa 1137 (sa 8916) over Bybee Branch

Fair

Warren County, Tennessee · 2 MI from SR1 · Structure no. 89S43990001

Built
1940
85 years old
Condition
Fair
inspected March 2023
Type
Culvert
Concrete Continuous
Length
28 ft
2 main spans
Daily traffic
2,300
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa 1137 (sa 8916) over Bybee Branch is a concrete continuous culvert carrying Nfa 1137 (sa 8916) over Bybee Branch in Warren County, Tennessee. It was built in 1940, so it is 85 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 5 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 2,300 vehicles a day, roughly 4% of them trucks, projected to reach 3,680 by 2042. The structure is 28 ft (8.5 m) long and 26 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNfa 1137 (sa 8916)
CrossesBybee Branch
Location2 MI from SR1
RouteCounty Highway 915
CountyWarren County
StateTennessee
Coordinates35.71187, -85.76112
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 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 evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating53.6 US tons
Inventory rating31.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length28 ft (8.5 m)
Longest span11 ft (3.4 m)
Deck width26 ft (8 m)
Roadway width25 ft (7.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,300 (2020)
Projected traffic3,680 by 2042
Trucks4%
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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$170,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 1137 (sa 8916) over Bybee Branch built?

It was built in 1940, making it 85 years old in 2025.

What condition is Nfa 1137 (sa 8916) 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 1137 (sa 8916) over Bybee Branch carry?

About 2,300 vehicles per day (2020 count), of which roughly 4% are trucks.

How long is Nfa 1137 (sa 8916) over Bybee Branch?

The structure is 28 ft (8.5 m) long with a longest span of 11 ft (3.4 m) and a deck 26 ft wide.

Who owns Nfa 1137 (sa 8916) over Bybee Branch?

It is owned by the County Highway Agency.