US Bridges

Nfa 2086 (sa 8510) over Dog Branch

Good

Trousdale County, Tennessee · 2.5 MI S of Macon Co. · Structure no. 85020860007

Built
1995
30 years old
Condition
Good
inspected March 2023
Type
Culvert
Concrete Continuous
Length
44 ft
2 main spans
Daily traffic
112
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 2086 (sa 8510) over Dog Branch is a concrete continuous culvert carrying Nfa 2086 (sa 8510) over Dog Branch in Trousdale County, Tennessee. It was built in 1995, so it is 30 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 112 vehicles a day, roughly 4% of them trucks, projected to reach 144 by 2041. The structure is 44 ft (13.4 m) long and 28 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesNfa 2086 (sa 8510)
CrossesDog Branch
Location2.5 MI S of Macon Co.
RouteCounty Highway 2086
CountyTrousdale County
StateTennessee
Coordinates36.41044, -86.03584
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 protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 alignment8: Equal to present desirable criteria
Operating rating60.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length44 ft (13.4 m)
Longest span15 ft (4.6 m)
Deck width28 ft (8.4 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic112 (2021)
Projected traffic144 by 2041
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 2086 (sa 8510) over Dog Branch built?

It was built in 1995, making it 30 years old in 2025.

What condition is Nfa 2086 (sa 8510) over Dog 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 March 2023.

How much traffic does Nfa 2086 (sa 8510) over Dog Branch carry?

About 112 vehicles per day (2021 count), of which roughly 4% are trucks.

How long is Nfa 2086 (sa 8510) over Dog Branch?

The structure is 44 ft (13.4 m) long with a longest span of 15 ft (4.6 m) and a deck 28 ft wide.

Who owns Nfa 2086 (sa 8510) over Dog Branch?

It is owned by the County Highway Agency.