US Bridges

Nfa A714 over Barnard Narrows Branch

Good

Roane County, Tennessee · 3.2 M S of SR58-SR72 JCT · Structure no. 730A3520001

Built
1984
41 years old
Condition
Good
inspected April 2023
Type
Culvert
Concrete Continuous
Length
38 ft
2 main spans
Daily traffic
430
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A714 over Barnard Narrows Branch is a concrete continuous culvert carrying Nfa A714 over Barnard Narrows Branch in Roane County, Tennessee. It was built in 1984, so it is 41 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 430 vehicles a day, roughly 2% of them trucks, projected to reach 688 by 2041. The structure is 38 ft (11.6 m) long and 27 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesNfa A714
CrossesBarnard Narrows Branch
Location3.2 M S of SR58-SR72 JCT
RouteCounty Highway 714
CountyRoane County
StateTennessee
Coordinates35.75862, -84.58085
Functional classRural Local

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 inspectionApril 2023
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 alignment8: Equal to present desirable criteria
Operating rating42.5 US tons
Inventory rating24.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length38 ft (11.6 m)
Longest span18 ft (5.5 m)
Deck width27 ft (8.2 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic430 (2020)
Projected traffic688 by 2041
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A714 over Barnard Narrows Branch built?

It was built in 1984, making it 41 years old in 2025.

What condition is Nfa A714 over Barnard Narrows 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 A714 over Barnard Narrows Branch carry?

About 430 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A714 over Barnard Narrows Branch?

The structure is 38 ft (11.6 m) long with a longest span of 18 ft (5.5 m) and a deck 27 ft wide.

Who owns Nfa A714 over Barnard Narrows Branch?

It is owned by the County Highway Agency.