US Bridges

Nfa A309 over Dunn Creek

Good

Sevier County, Tennessee · .5 M S of SR339 · Structure no. 780A3090001

Built
1960
65 years old
Condition
Good
inspected June 2023
Type
Culvert
Steel
Length
31 ft
2 main spans
Daily traffic
190
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A309 over Dunn Creek is a steel culvert carrying Nfa A309 over Dunn Creek in Sevier County, Tennessee. It was built in 1960, so it is 65 years old, older 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 190 vehicles a day, roughly 2% of them trucks, projected to reach 304 by 2041. The structure is 31 ft (9.4 m) long. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesNfa A309
CrossesDunn Creek
Location.5 M S of SR339
RouteCounty Highway 309
CountySevier County
StateTennessee
Coordinates35.82258, -83.3184
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 inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating45.7 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadUnknown
Structure length31 ft (9.4 m)
Longest span13 ft (4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic190 (2020)
Projected traffic304 by 2041
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 A309 over Dunn Creek built?

It was built in 1960, making it 65 years old in 2025.

What condition is Nfa A309 over Dunn Creek 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 June 2023.

How much traffic does Nfa A309 over Dunn Creek carry?

About 190 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A309 over Dunn Creek?

The structure is 31 ft (9.4 m) long with a longest span of 13 ft (4 m).

Who owns Nfa A309 over Dunn Creek?

It is owned by the County Highway Agency.