US Bridges

Nfa A580 over Dillard Creek

Fair

Obion County, Tennessee · 3.9 MI NE JCT SR105&SR211 · Structure no. 660A5800001

Built
1970
55 years old, rebuilt 2006
Condition
Fair
inspected March 2023
Type
Channel Beam
Concrete
Length
47 ft
2 main spans
Daily traffic
60
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A580 over Dillard Creek is a concrete channel beam carrying Nfa A580 over Dillard Creek in Obion County, Tennessee. It was built in 1970 and reconstructed in 2006, so it is 55 years old, older 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 5 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 60 vehicles a day, roughly 4% of them trucks, projected to reach 96 by 2041. The structure is 47 ft (14.3 m) long and 22 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesNfa A580
CrossesDillard Creek
Location3.9 MI NE JCT SR105&SR211
RouteCounty Highway 580
CountyObion County
StateTennessee
Coordinates36.21648, -89.12651
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34.6 US tons
Inventory rating20.7 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans2
Design loadH 15
Structure length47 ft (14.3 m)
Longest span29 ft (8.8 m)
Deck width22 ft (6.6 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic60 (2020)
Projected traffic96 by 2041
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 A580 over Dillard Creek built?

It was built in 1970, making it 55 years old in 2025. It was reconstructed in 2006.

What condition is Nfa A580 over Dillard Creek 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 A580 over Dillard Creek carry?

About 60 vehicles per day (2020 count), of which roughly 4% are trucks.

How long is Nfa A580 over Dillard Creek?

The structure is 47 ft (14.3 m) long with a longest span of 29 ft (8.8 m) and a deck 22 ft wide.

Who owns Nfa A580 over Dillard Creek?

It is owned by the County Highway Agency.