US Bridges

Nfa 1533 (sa 6618) over Napier Branch

Fair

Obion County, Tennessee · In Union City · Structure no. 66015330001

Built
1992
33 years old
Condition
Fair
inspected March 2023
Type
Culvert
Concrete Continuous
Length
34 ft
2 main spans
Daily traffic
878
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

Nfa 1533 (sa 6618) over Napier Branch is a concrete continuous culvert carrying Nfa 1533 (sa 6618) over Napier Branch in Obion County, Tennessee. It was built in 1992, so it is 33 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 878 vehicles a day, roughly 11% of them trucks, projected to reach 1,328 by 2041. The structure is 34 ft (10.4 m) long and 39 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

Open in Google Maps
CarriesNfa 1533 (sa 6618)
CrossesNapier Branch
LocationIn Union City
RouteCity Street 1533
CountyObion County
StateTennessee
Coordinates36.4277, -89.01544
Functional classUrban Collector

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 inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length34 ft (10.4 m)
Longest span15 ft (4.6 m)
Deck width39 ft (11.9 m)
Roadway width33 ft (10.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic878 (2021)
Projected traffic1,328 by 2041
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 1533 (sa 6618) over Napier Branch built?

It was built in 1992, making it 33 years old in 2025.

What condition is Nfa 1533 (sa 6618) over Napier 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 March 2023.

How much traffic does Nfa 1533 (sa 6618) over Napier Branch carry?

About 878 vehicles per day (2021 count), of which roughly 11% are trucks.

How long is Nfa 1533 (sa 6618) over Napier Branch?

The structure is 34 ft (10.4 m) long with a longest span of 15 ft (4.6 m) and a deck 39 ft wide.

Who owns Nfa 1533 (sa 6618) over Napier Branch?

It is owned by the City or Municipal Highway Agency.