US Bridges

Nfa A285 over Sink Creek

Fair

DeKalb County, Tennessee · 1MI. West of SR56 · Structure no. 210A2250001

Built
1987
38 years old
Condition
Fair
inspected November 2023
Type
Culvert
Concrete Continuous
Length
49 ft
3 main spans
Daily traffic
60
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A285 over Sink Creek is a concrete continuous culvert carrying Nfa A285 over Sink Creek in DeKalb 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 60 vehicles a day, roughly 2% of them trucks, projected to reach 96 by 2042. The structure is 49 ft (14.9 m) long and 26 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNfa A285
CrossesSink Creek
Location1MI. West of SR56
RouteCounty Highway 285
CountyDeKalb County
StateTennessee
Coordinates35.8637, -85.82175
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 inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating98.2 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length49 ft (14.9 m)
Longest span15 ft (4.6 m)
Deck width26 ft (7.9 m)
Roadway width22 ft (6.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic60 (2020)
Projected traffic96 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 A285 over Sink Creek built?

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

What condition is Nfa A285 over Sink 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 November 2023.

How much traffic does Nfa A285 over Sink Creek carry?

About 60 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A285 over Sink Creek?

The structure is 49 ft (14.9 m) long with a longest span of 15 ft (4.6 m) and a deck 26 ft wide.

Who owns Nfa A285 over Sink Creek?

It is owned by the County Highway Agency.