US Bridges

Nfa C561 over Horse Creek

Fair

Sullivan County, Tennessee · W Off SR93 1.2 M S of 347 · Structure no. 820C5610001

Built
1975
50 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
60 ft
2 main spans
Daily traffic
970
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa C561 over Horse Creek is a steel stringer/multi-beam or girder carrying Nfa C561 over Horse Creek in Sullivan County, Tennessee. It was built in 1975, so it is 50 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.

It carries about 970 vehicles a day, roughly 2% of them trucks, projected to reach 1,552 by 2042. The structure is 60 ft (18.3 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 C561
CrossesHorse Creek
LocationW Off SR93 1.2 M S of 347
RouteCounty Highway 561
CountySullivan County
StateTennessee
Coordinates36.459, -82.608
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length60 ft (18.3 m)
Longest span27 ft (8.3 m)
Deck width26 ft (7.8 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic970 (2020)
Projected traffic1,552 by 2042
Trucks2%
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 statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$170,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa C561 over Horse Creek built?

It was built in 1975, making it 50 years old in 2025.

What condition is Nfa C561 over Horse 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 March 2024.

How much traffic does Nfa C561 over Horse Creek carry?

About 970 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa C561 over Horse Creek?

The structure is 60 ft (18.3 m) long with a longest span of 27 ft (8.3 m) and a deck 26 ft wide.

Who owns Nfa C561 over Horse Creek?

It is owned by the County Highway Agency.