US Bridges

Nfa A165 over Blackburn Fork

Fair

Putnam County, Tennessee · 1MI from Jackson CO Line · Structure no. 710A1650001

Built
1987
38 years old
Condition
Fair
inspected September 2024
Type
Culvert
Concrete Continuous
Length
48 ft
3 main spans
Daily traffic
220
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A165 over Blackburn Fork is a concrete continuous culvert carrying Nfa A165 over Blackburn Fork in Putnam County, Tennessee. It was built in 1987, so it is 38 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 220 vehicles a day, roughly 2% of them trucks, projected to reach 352 by 2042. The structure is 48 ft (14.7 m) long and 41 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesNfa A165
CrossesBlackburn Fork
Location1MI from Jackson CO Line
RouteCounty Highway 165
CountyPutnam County
StateTennessee
Coordinates36.21881, -85.5765
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 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 adequacy6: Equal to 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 Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length48 ft (14.7 m)
Longest span21 ft (6.5 m)
Deck width41 ft (12.6 m)
Roadway width22 ft (6.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic220 (2020)
Projected traffic352 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 A165 over Blackburn Fork built?

It was built in 1987, making it 38 years old in 2025.

What condition is Nfa A165 over Blackburn Fork 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 September 2024.

How much traffic does Nfa A165 over Blackburn Fork carry?

About 220 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A165 over Blackburn Fork?

The structure is 48 ft (14.7 m) long with a longest span of 21 ft (6.5 m) and a deck 41 ft wide.

Who owns Nfa A165 over Blackburn Fork?

It is owned by the County Highway Agency.