US Bridges

Nfa 1137 (sa 8915) over Lt Fork Dry Branch

Fair

Warren County, Tennessee · 1 MI East of SR 56 · Structure no. 89021830007

Built
1940
85 years old, rebuilt 1960
Condition
Fair
inspected April 2023
Type
Culvert
Concrete Continuous
Length
23 ft
2 main spans
Daily traffic
124
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 1137 (sa 8915) over Lt Fork Dry Branch is a concrete continuous culvert carrying Nfa 1137 (sa 8915) over Lt Fork Dry Branch in Warren County, Tennessee. It was built in 1940 and reconstructed in 1960, 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 124 vehicles a day, roughly 4% of them trucks, projected to reach 210 by 2042. The structure is 23 ft (7 m) long and 24 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesNfa 1137 (sa 8915)
CrossesLt Fork Dry Branch
Location1 MI East of SR 56
RouteCounty Highway 1137
CountyWarren County
StateTennessee
Coordinates35.74887, -85.77161
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
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 inspectionApril 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.7 US tons
Inventory rating21.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length23 ft (7 m)
Longest span10 ft (3 m)
Deck width24 ft (7.4 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic124 (2021)
Projected traffic210 by 2042
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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$77,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 1137 (sa 8915) over Lt Fork Dry Branch built?

It was built in 1940, making it 85 years old in 2025. It was reconstructed in 1960.

What condition is Nfa 1137 (sa 8915) over Lt Fork Dry 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 April 2023.

How much traffic does Nfa 1137 (sa 8915) over Lt Fork Dry Branch carry?

About 124 vehicles per day (2021 count), of which roughly 4% are trucks.

How long is Nfa 1137 (sa 8915) over Lt Fork Dry Branch?

The structure is 23 ft (7 m) long with a longest span of 10 ft (3 m) and a deck 24 ft wide.

Who owns Nfa 1137 (sa 8915) over Lt Fork Dry Branch?

It is owned by the County Highway Agency.