US Bridges

Nfa A303 over Dry Creek

Fair

Unicoi County, Tennessee · N of Erwin E of SR 36 · Structure no. 860A3030001

Built
1983
42 years old
Condition
Fair
inspected July 2024
Type
Culvert
Concrete
Length
24 ft
1 main span
Daily traffic
310
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A303 over Dry Creek is a concrete culvert carrying Nfa A303 over Dry Creek in Unicoi County, Tennessee. It was built in 1983, so it is 42 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 310 vehicles a day, roughly 2% of them trucks, projected to reach 496 by 2040. The structure is 24 ft (7.3 m) long and 40 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesNfa A303
CrossesDry Creek
LocationN of Erwin E of SR 36
RouteCounty Highway 303
CountyUnicoi County
StateTennessee
Coordinates36.18125, -82.36512
Functional classUrban 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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span22 ft (6.7 m)
Deck width40 ft (12.1 m)
Roadway width26 ft (7.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic310 (2020)
Projected traffic496 by 2040
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 A303 over Dry Creek built?

It was built in 1983, making it 42 years old in 2025.

What condition is Nfa A303 over Dry 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 July 2024.

How much traffic does Nfa A303 over Dry Creek carry?

About 310 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A303 over Dry Creek?

The structure is 24 ft (7.3 m) long with a longest span of 22 ft (6.7 m) and a deck 40 ft wide.

Who owns Nfa A303 over Dry Creek?

It is owned by the County Highway Agency.