US Bridges

Nfa A315 over Branch

Fair

Dickson County, Tennessee · Porter RD in Dickson CO · Structure no. 220A3150005

Built
1994
31 years old
Condition
Fair
inspected June 2024
Type
Culvert
Concrete
Length
23 ft
1 main span
Daily traffic
240
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A315 over Branch is a concrete culvert carrying Nfa A315 over Branch in Dickson County, Tennessee. It was built in 1994, so it is 31 years old, younger 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 240 vehicles a day, roughly 1% of them trucks, projected to reach 384 by 2038. The structure is 23 ft (7 m) long and 24 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesNfa A315
CrossesBranch
LocationPorter RD in Dickson CO
RouteCounty Highway 315
CountyDickson County
StateTennessee
Coordinates36.0106, -87.27662
Functional classRural 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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
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 rating98.2 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length23 ft (7 m)
Longest span15 ft (4.6 m)
Deck width24 ft (7.3 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic240 (2020)
Projected traffic384 by 2038
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 A315 over Branch built?

It was built in 1994, making it 31 years old in 2025.

What condition is Nfa A315 over 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 June 2024.

How much traffic does Nfa A315 over Branch carry?

About 240 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is Nfa A315 over Branch?

The structure is 23 ft (7 m) long with a longest span of 15 ft (4.6 m) and a deck 24 ft wide.

Who owns Nfa A315 over Branch?

It is owned by the County Highway Agency.