US Bridges

Nfa A264 over Rock Creek

Fair

Unicoi County, Tennessee · E of Erwin-Off SR 395 · Structure no. 860A4390001

Built
1983
42 years old
Condition
Fair
inspected July 2024
Type
Culvert
Concrete Continuous
Length
33 ft
2 main spans
Daily traffic
160
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A264 over Rock Creek is a concrete continuous culvert carrying Nfa A264 over Rock 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 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 160 vehicles a day, roughly 6% of them trucks, projected to reach 256 by 2040. The structure is 33 ft (10.2 m) long and 26 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesNfa A264
CrossesRock Creek
LocationE of Erwin-Off SR 395
RouteCounty Highway 264
CountyUnicoi County
StateTennessee
Coordinates36.152, -82.38416
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.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating31.7 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length33 ft (10.2 m)
Longest span15 ft (4.6 m)
Deck width26 ft (7.9 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic160 (2020)
Projected traffic256 by 2040
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$83,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A264 over Rock Creek built?

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

What condition is Nfa A264 over Rock 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 A264 over Rock Creek carry?

About 160 vehicles per day (2020 count), of which roughly 6% are trucks.

How long is Nfa A264 over Rock Creek?

The structure is 33 ft (10.2 m) long with a longest span of 15 ft (4.6 m) and a deck 26 ft wide.

Who owns Nfa A264 over Rock Creek?

It is owned by the County Highway Agency.