US Bridges

Nfa 1137 (sa 8915) over Rt Fork Dry Branch

Good

Warren County, Tennessee · .5 MI East of SR 56 · Structure no. 89021830005

Built
1983
42 years old
Condition
Good
inspected April 2023
Type
Culvert
Concrete Continuous
Length
40 ft
3 main spans
Daily traffic
124
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 1137 (sa 8915) over Rt Fork Dry Branch is a concrete continuous culvert carrying Nfa 1137 (sa 8915) over Rt Fork Dry Branch in Warren County, Tennessee. It was built in 1983, so it is 42 years old, younger than the Tennessee average of 47.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 124 vehicles a day, roughly 4% of them trucks, projected to reach 210 by 2042. The structure is 40 ft (12.2 m) long and 31 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesNfa 1137 (sa 8915)
CrossesRt Fork Dry Branch
Location.5 MI East of SR 56
RouteCounty Highway 1137
Coordinates35.76147, -85.76867
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 alignment8: Equal to present desirable criteria
Operating rating96.1 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length40 ft (12.2 m)
Longest span12 ft (3.7 m)
Deck width31 ft (9.3 m)
Roadway width27 ft (8.2 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

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

It was built in 1983, making it 42 years old in 2025.

What condition is Nfa 1137 (sa 8915) over Rt Fork Dry Branch in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2023.

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

The structure is 40 ft (12.2 m) long with a longest span of 12 ft (3.7 m) and a deck 31 ft wide.

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

It is owned by the County Highway Agency.