US Bridges

Nfa 1394 (sa 4603) over Roan Creek

FairPosted for load

Johnson County, Tennessee · Dry Run Rd-S Off SR167 · Structure no. 46S24610013

Built
1954
71 years old
Condition
Fair
inspected April 2024
Type
Tee Beam
Concrete
Length
171 ft
6 main spans
Daily traffic
1,069
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 1394 (sa 4603) over Roan Creek is a concrete tee beam carrying Nfa 1394 (sa 4603) over Roan Creek in Johnson County, Tennessee. It was built in 1954, so it is 71 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. Its operating status is: posted for load restriction.

It carries about 1,069 vehicles a day, roughly 3% of them trucks, projected to reach 1,710 by 2042. The structure is 171 ft (52.1 m) long and 29 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNfa 1394 (sa 4603)
CrossesRoan Creek
LocationDry Run Rd-S Off SR167
RouteCounty Highway 1394
CountyJohnson County
StateTennessee
Coordinates36.38655, -81.86795
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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 rating54.6 US tons
Inventory rating32.7 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans6
Design loadH 15
Structure length171 ft (52.1 m)
Longest span29 ft (8.7 m)
Deck width29 ft (8.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,069 (2021)
Projected traffic1,710 by 2042
Trucks3%
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.3 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 1394 (sa 4603) over Roan Creek built?

It was built in 1954, making it 71 years old in 2025.

What condition is Nfa 1394 (sa 4603) over Roan 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 April 2024.

How much traffic does Nfa 1394 (sa 4603) over Roan Creek carry?

About 1,069 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 1394 (sa 4603) over Roan Creek?

The structure is 171 ft (52.1 m) long with a longest span of 29 ft (8.7 m) and a deck 29 ft wide.

Who owns Nfa 1394 (sa 4603) over Roan Creek?

It is owned by the County Highway Agency.